├── .gitignore ├── LICENSE ├── README.md ├── crunch.sln ├── crunch.vcxproj ├── crunch.vcxproj.filters ├── crunch.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ └── contents.xcworkspacedata └── xcuserdata │ └── ChevyRay.xcuserdatad │ └── xcschemes │ ├── crunch.xcscheme │ └── xcschememanagement.plist └── crunch ├── GuillotineBinPack.cpp ├── GuillotineBinPack.h ├── MaxRectsBinPack.cpp ├── MaxRectsBinPack.h ├── Rect.cpp ├── Rect.h ├── binary.cpp ├── binary.hpp ├── bitmap.cpp ├── bitmap.hpp ├── hash.cpp ├── hash.hpp ├── lodepng.cpp ├── lodepng.h ├── main.cpp ├── packer.cpp ├── packer.hpp ├── str.cpp ├── str.hpp └── tinydir.h /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files 2 | *.slo 3 | *.lo 4 | *.o 5 | *.obj 6 | 7 | # Precompiled Headers 8 | *.gch 9 | *.pch 10 | 11 | # Compiled Dynamic libraries 12 | *.so 13 | *.dylib 14 | *.dll 15 | 16 | # Fortran module files 17 | *.mod 18 | *.smod 19 | 20 | # Compiled Static libraries 21 | *.lai 22 | *.la 23 | *.a 24 | *.lib 25 | 26 | # Executables 27 | *.exe 28 | *.out 29 | *.app 30 | *.ilk 31 | *.pdb 32 | *.tlog 33 | *.log 34 | Debug/* 35 | Release/* 36 | *.opendb 37 | *.db 38 | *.suo 39 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Unless otherwise specified in a source file, everything 2 | in this project falls under the following license: 3 | 4 | MIT License 5 | 6 | Copyright (c) 2017 Chevy Ray Johnston 7 | 8 | Permission is hereby granted, free of charge, to any person obtaining a copy 9 | of this software and associated documentation files (the "Software"), to deal 10 | in the Software without restriction, including without limitation the rights 11 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 12 | copies of the Software, and to permit persons to whom the Software is 13 | furnished to do so, subject to the following conditions: 14 | 15 | The above copyright notice and this permission notice shall be included in all 16 | copies or substantial portions of the Software. 17 | 18 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 | SOFTWARE. 25 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # crunch 2 | 3 | This is a command line tool that will pack a bunch of images into a single, larger image. It was designed for [Celeste](http://www.celestegame.com/), but could be very helpful for other games. 4 | 5 | It is designed using libraries with permissible licenses, so you are able to use it freely in your commercial and non-commercial projects. Please see each source file for its respective copyright and license. 6 | 7 | ### Features 8 | 9 | - Export XML, JSON, or binary data 10 | - Trim excess transparency 11 | - Rotate images to fit 12 | - Control atlas size and padding 13 | - Premultiply pixel values 14 | - Recursively scans folders 15 | - Remove duplicate images 16 | - Caching to prevent redundant builds 17 | - Multi-image atlas when the sprites don't fit 18 | 19 | ### What does it do? 20 | 21 | Given a folder with several images, like so: 22 | 23 | ``` 24 | images/ 25 | player.png 26 | tree.png 27 | enemy.png 28 | ``` 29 | 30 | It will output something like this: 31 | 32 | ``` 33 | bin/ 34 | images.png 35 | images.xml 36 | images.hash 37 | ``` 38 | 39 | Where `images.png` is the packed image, `images.xml` is an xml file describing where each sub-image is located, and `images.hash` is used for file caching (if none of the input files have changed since the last pack, the program will terminate). 40 | 41 | There is also an option to use a binary format instead of xml. 42 | 43 | ### Usage 44 | 45 | `crunch [OUTPUT] [INPUT1,INPUT2,INPUT3...] [OPTIONS...]` 46 | 47 | For example... 48 | 49 | `crunch bin/atlases/atlas assets/characters,assets/tiles -p -t -v -u -r -j` 50 | 51 | This will output the following files: 52 | 53 | ``` 54 | bin/atlases/atlas.png 55 | bin/atlases/atlas.json 56 | bin/atlases/atlas.hash 57 | ``` 58 | 59 | ### Options 60 | 61 | | option | alias | description | 62 | | ------------- | ------------- | ------------| 63 | | -d | --default | use default settings (-x -p -t -u) 64 | | -x | --xml | saves the atlas data as a .xml file 65 | | -b | --binary | saves the atlas data as a .bin file 66 | | -j | --json | saves the atlas data as a .json file 67 | | -p | --premultiply | premultiplies the pixels of the bitmaps by their alpha channel 68 | | -t | --trim | trims excess transparency off the bitmaps 69 | | -v | --verbose | print to the debug console as the packer works 70 | | -f | --force | ignore caching, forcing the packer to repack 71 | | -u | --unique | remove duplicate bitmaps from the atlas 72 | | -r | --rotate | enabled rotating bitmaps 90 degrees clockwise when packing 73 | | -s# | --size# | max atlas size (# can be 4096, 2048, 1024, 512, 256, 128, or 64) 74 | | -p# | --pad# | padding between images (# can be from 0 to 16) 75 | 76 | ### Binary Format 77 | 78 | ``` 79 | [int16] num_textures (below block is repeated this many times) 80 | [string] name 81 | [int16] num_images (below block is repeated this many times) 82 | [string] img_name 83 | [int16] img_x 84 | [int16] img_y 85 | [int16] img_width 86 | [int16] img_height 87 | [int16] img_frame_x (if --trim enabled) 88 | [int16] img_frame_y (if --trim enabled) 89 | [int16] img_frame_width (if --trim enabled) 90 | [int16] img_frame_height (if --trim enabled) 91 | [byte] img_rotated (if --rotate enabled) 92 | ``` 93 | 94 | ### License 95 | 96 | Unless otherwise specified in a source file, everything in this project falls under the following license: 97 | 98 | ``` 99 | MIT License 100 | 101 | Copyright (c) 2017 Chevy Ray Johnston 102 | 103 | Permission is hereby granted, free of charge, to any person obtaining a copy 104 | of this software and associated documentation files (the "Software"), to deal 105 | in the Software without restriction, including without limitation the rights 106 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 107 | copies of the Software, and to permit persons to whom the Software is 108 | furnished to do so, subject to the following conditions: 109 | 110 | The above copyright notice and this permission notice shall be included in all 111 | copies or substantial portions of the Software. 112 | 113 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 114 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 115 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 116 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 117 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 118 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 119 | SOFTWARE. 120 | ``` 121 | -------------------------------------------------------------------------------- /crunch.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 14 4 | VisualStudioVersion = 14.0.25123.0 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "crunch", "crunch.vcxproj", "{45DC29F9-10AB-4642-BE8F-CA01203EDF17}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|x64 = Debug|x64 11 | Debug|x86 = Debug|x86 12 | Release|x64 = Release|x64 13 | Release|x86 = Release|x86 14 | EndGlobalSection 15 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 16 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Debug|x64.ActiveCfg = Debug|x64 17 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Debug|x64.Build.0 = Debug|x64 18 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Debug|x86.ActiveCfg = Debug|Win32 19 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Debug|x86.Build.0 = Debug|Win32 20 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Release|x64.ActiveCfg = Release|x64 21 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Release|x64.Build.0 = Release|x64 22 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Release|x86.ActiveCfg = Release|Win32 23 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17}.Release|x86.Build.0 = Release|Win32 24 | EndGlobalSection 25 | GlobalSection(SolutionProperties) = preSolution 26 | HideSolutionNode = FALSE 27 | EndGlobalSection 28 | EndGlobal 29 | -------------------------------------------------------------------------------- /crunch.vcxproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | Debug 6 | Win32 7 | 8 | 9 | Release 10 | Win32 11 | 12 | 13 | Debug 14 | x64 15 | 16 | 17 | Release 18 | x64 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | {45DC29F9-10AB-4642-BE8F-CA01203EDF17} 47 | Win32Proj 48 | crunch 49 | 8.1 50 | 51 | 52 | 53 | Application 54 | true 55 | v140 56 | Unicode 57 | 58 | 59 | Application 60 | false 61 | v140 62 | true 63 | Unicode 64 | 65 | 66 | Application 67 | true 68 | v140 69 | Unicode 70 | 71 | 72 | Application 73 | false 74 | v140 75 | true 76 | Unicode 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | true 98 | 99 | 100 | true 101 | 102 | 103 | false 104 | 105 | 106 | false 107 | 108 | 109 | 110 | 111 | 112 | Level3 113 | Disabled 114 | WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions) 115 | 116 | 117 | Console 118 | true 119 | 120 | 121 | 122 | 123 | 124 | 125 | Level3 126 | Disabled 127 | _DEBUG;_CONSOLE;%(PreprocessorDefinitions) 128 | 129 | 130 | Console 131 | true 132 | 133 | 134 | 135 | 136 | Level3 137 | 138 | 139 | Full 140 | true 141 | true 142 | WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions) 143 | 144 | 145 | Console 146 | true 147 | true 148 | true 149 | 150 | 151 | 152 | 153 | Level3 154 | 155 | 156 | MaxSpeed 157 | true 158 | true 159 | NDEBUG;_CONSOLE;%(PreprocessorDefinitions) 160 | 161 | 162 | Console 163 | true 164 | true 165 | true 166 | 167 | 168 | 169 | 170 | 171 | -------------------------------------------------------------------------------- /crunch.vcxproj.filters: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | 5 | {4FC737F1-C7A5-4376-A066-2A32D752A2FF} 6 | cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx 7 | 8 | 9 | {93995380-89BD-4b04-88EB-625FBE52EBFB} 10 | h;hh;hpp;hxx;hm;inl;inc;xsd 11 | 12 | 13 | {67DA6AB6-F800-4c08-8B7A-83BB121AAD01} 14 | rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms 15 | 16 | 17 | 18 | 19 | Header Files 20 | 21 | 22 | Header Files 23 | 24 | 25 | Header Files 26 | 27 | 28 | Header Files 29 | 30 | 31 | Header Files 32 | 33 | 34 | Header Files 35 | 36 | 37 | Header Files 38 | 39 | 40 | Header Files 41 | 42 | 43 | Header Files 44 | 45 | 46 | Header Files 47 | 48 | 49 | 50 | 51 | Source Files 52 | 53 | 54 | Source Files 55 | 56 | 57 | Source Files 58 | 59 | 60 | Source Files 61 | 62 | 63 | Source Files 64 | 65 | 66 | Source Files 67 | 68 | 69 | Source Files 70 | 71 | 72 | Source Files 73 | 74 | 75 | Source Files 76 | 77 | 78 | Source Files 79 | 80 | 81 | -------------------------------------------------------------------------------- /crunch.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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263 | GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE; 264 | GCC_WARN_UNUSED_FUNCTION = YES; 265 | GCC_WARN_UNUSED_VARIABLE = YES; 266 | MACOSX_DEPLOYMENT_TARGET = 10.12; 267 | MTL_ENABLE_DEBUG_INFO = NO; 268 | SDKROOT = macosx; 269 | }; 270 | name = Release; 271 | }; 272 | 1BD1CE561E78EC44009C02A2 /* Debug */ = { 273 | isa = XCBuildConfiguration; 274 | buildSettings = { 275 | PRODUCT_NAME = "$(TARGET_NAME)"; 276 | }; 277 | name = Debug; 278 | }; 279 | 1BD1CE571E78EC44009C02A2 /* Release */ = { 280 | isa = XCBuildConfiguration; 281 | buildSettings = { 282 | GCC_OPTIMIZATION_LEVEL = fast; 283 | PRODUCT_NAME = "$(TARGET_NAME)"; 284 | }; 285 | name = Release; 286 | }; 287 | /* End XCBuildConfiguration section */ 288 | 289 | /* Begin XCConfigurationList section */ 290 | 1BD1CE491E78EC44009C02A2 /* Build configuration list for PBXProject "crunch" */ = { 291 | isa = XCConfigurationList; 292 | buildConfigurations = ( 293 | 1BD1CE531E78EC44009C02A2 /* Debug */, 294 | 1BD1CE541E78EC44009C02A2 /* Release */, 295 | ); 296 | defaultConfigurationIsVisible = 0; 297 | defaultConfigurationName = Release; 298 | }; 299 | 1BD1CE551E78EC44009C02A2 /* Build configuration list for PBXNativeTarget "crunch" */ = { 300 | isa = XCConfigurationList; 301 | buildConfigurations = ( 302 | 1BD1CE561E78EC44009C02A2 /* Debug */, 303 | 1BD1CE571E78EC44009C02A2 /* Release */, 304 | ); 305 | defaultConfigurationIsVisible = 0; 306 | defaultConfigurationName = Release; 307 | }; 308 | /* End XCConfigurationList section */ 309 | }; 310 | rootObject = 1BD1CE461E78EC44009C02A2 /* Project object */; 311 | } 312 | -------------------------------------------------------------------------------- /crunch.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /crunch.xcodeproj/xcuserdata/ChevyRay.xcuserdatad/xcschemes/crunch.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 24 | 25 | 30 | 31 | 32 | 33 | 39 | 40 | 41 | 42 | 43 | 44 | 54 | 56 | 62 | 63 | 64 | 65 | 66 | 67 | 73 | 75 | 81 | 82 | 83 | 84 | 86 | 87 | 90 | 91 | 92 | -------------------------------------------------------------------------------- /crunch.xcodeproj/xcuserdata/ChevyRay.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | crunch.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | 1BD1CE4D1E78EC44009C02A2 16 | 17 | primary 18 | 19 | 20 | 21 | 22 | 23 | -------------------------------------------------------------------------------- /crunch/GuillotineBinPack.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/GuillotineBinPack.cpp -------------------------------------------------------------------------------- /crunch/GuillotineBinPack.h: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/GuillotineBinPack.h -------------------------------------------------------------------------------- /crunch/MaxRectsBinPack.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/MaxRectsBinPack.cpp -------------------------------------------------------------------------------- /crunch/MaxRectsBinPack.h: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/MaxRectsBinPack.h -------------------------------------------------------------------------------- /crunch/Rect.cpp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/Rect.cpp -------------------------------------------------------------------------------- /crunch/Rect.h: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ChevyRay/crunch/a836f6dbaf2af6bd10e1f1bff0c74ad82ceaa913/crunch/Rect.h -------------------------------------------------------------------------------- /crunch/binary.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #include "binary.hpp" 28 | #include 29 | 30 | void WriteString(ofstream& bin, const string& value) 31 | { 32 | bin.write(value.data(), value.length() + 1); 33 | } 34 | 35 | void WriteShort(ofstream& bin, int16_t value) 36 | { 37 | bin.put(static_cast(value & 0xff)); 38 | bin.put(static_cast((value >> 8) & 0xff)); 39 | } 40 | 41 | void WriteByte(ofstream& bin, char value) 42 | { 43 | bin.write(&value, 1); 44 | } 45 | 46 | string ReadString(ifstream& bin) 47 | { 48 | char data[256]; 49 | bin.read(data, 1); 50 | char* chr = data; 51 | while (*chr != '\0') 52 | bin.read(++chr, 1); 53 | return data; 54 | } 55 | 56 | int16_t ReadShort(ifstream& bin) 57 | { 58 | int16_t value; 59 | bin.read(reinterpret_cast(&value), 2); 60 | return value; 61 | } 62 | -------------------------------------------------------------------------------- /crunch/binary.hpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #ifndef binary_hpp 28 | #define binary_hpp 29 | 30 | #include 31 | #include 32 | 33 | using namespace std; 34 | 35 | void WriteString(ofstream& bin, const string& value); 36 | void WriteShort(ofstream& bin, int16_t value); 37 | void WriteByte(ofstream& bin, char value); 38 | string ReadString(ifstream& bin); 39 | int16_t ReadShort(ifstream& bin); 40 | 41 | #endif 42 | -------------------------------------------------------------------------------- /crunch/bitmap.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #include "bitmap.hpp" 28 | #include 29 | #define LODEPNG_NO_COMPILE_CPP 30 | #include "lodepng.h" 31 | #include 32 | #include "hash.hpp" 33 | 34 | using namespace std; 35 | 36 | Bitmap::Bitmap(const string& file, const string& name, bool premultiply, bool trim) 37 | : name(name) 38 | { 39 | //Load the png file 40 | unsigned char* pdata; 41 | unsigned int pw, ph; 42 | if (lodepng_decode32_file(&pdata, &pw, &ph, file.data())) 43 | { 44 | cerr << "failed to load png: " << file << endl; 45 | exit(EXIT_FAILURE); 46 | } 47 | int w = static_cast(pw); 48 | int h = static_cast(ph); 49 | uint32_t* pixels = reinterpret_cast(pdata); 50 | 51 | //Premultiply all the pixels by their alpha 52 | if (premultiply) 53 | { 54 | int count = w * h; 55 | uint32_t c,a,r,g,b; 56 | float m; 57 | for (int i = 0; i < count; ++i) 58 | { 59 | c = pixels[i]; 60 | a = c >> 24; 61 | m = static_cast(a) / 255.0f; 62 | r = static_cast((c & 0xff) * m); 63 | g = static_cast(((c >> 8) & 0xff) * m); 64 | b = static_cast(((c >> 16) & 0xff) * m); 65 | pixels[i] = (a << 24) | (b << 16) | (g << 8) | r; 66 | } 67 | } 68 | 69 | //TODO: skip if all corners contain opaque pixels? 70 | 71 | //Get pixel bounds 72 | int minX = w - 1; 73 | int minY = h - 1; 74 | int maxX = 0; 75 | int maxY = 0; 76 | if (trim) 77 | { 78 | uint32_t p; 79 | for (int y = 0; y < h; ++y) 80 | { 81 | for (int x = 0; x < w; ++x) 82 | { 83 | p = pixels[y * w + x]; 84 | if ((p >> 24) > 0) 85 | { 86 | minX = min(x, minX); 87 | minY = min(y, minY); 88 | maxX = max(x, maxX); 89 | maxY = max(y, maxY); 90 | } 91 | } 92 | } 93 | if (maxX < minX || maxY < minY) 94 | { 95 | minX = 0; 96 | minY = 0; 97 | maxX = w - 1; 98 | maxY = h - 1; 99 | cout << "image is completely transparent: " << file << endl; 100 | } 101 | } 102 | else 103 | { 104 | minX = 0; 105 | minY = 0; 106 | maxX = w - 1; 107 | maxY = h - 1; 108 | } 109 | 110 | //Calculate our trimmed size 111 | width = (maxX - minX) + 1; 112 | height = (maxY - minY) + 1; 113 | frameW = w; 114 | frameH = h; 115 | 116 | if (width == w && height == h) 117 | { 118 | //If we aren't trimmed, use the loaded image data 119 | frameX = 0; 120 | frameY = 0; 121 | data = pixels; 122 | } 123 | else 124 | { 125 | //Create the trimmed image data 126 | data = reinterpret_cast(calloc(width * height, sizeof(uint32_t))); 127 | frameX = -minX; 128 | frameY = -minY; 129 | 130 | //Copy trimmed pixels over to the trimmed pixel array 131 | for (int y = minY; y <= maxY; ++y) 132 | for (int x = minX; x <= maxX; ++x) 133 | data[(y - minY) * width + (x - minX)] = pixels[y * w + x]; 134 | 135 | //Free the untrimmed pixels 136 | free(pixels); 137 | } 138 | 139 | //Generate a hash for the bitmap 140 | hashValue = 0; 141 | HashCombine(hashValue, static_cast(width)); 142 | HashCombine(hashValue, static_cast(height)); 143 | HashData(hashValue, reinterpret_cast(data), sizeof(uint32_t) * width * height); 144 | } 145 | 146 | Bitmap::Bitmap(int width, int height) 147 | : width(width), height(height) 148 | { 149 | data = reinterpret_cast(calloc(width * height, sizeof(uint32_t))); 150 | } 151 | 152 | Bitmap::~Bitmap() 153 | { 154 | free(data); 155 | } 156 | 157 | void Bitmap::SaveAs(const string& file) 158 | { 159 | unsigned char* pdata = reinterpret_cast(data); 160 | unsigned int pw = static_cast(width); 161 | unsigned int ph = static_cast(height); 162 | if (lodepng_encode32_file(file.data(), pdata, pw, ph)) 163 | { 164 | cout << "failed to save png: " << file << endl; 165 | exit(EXIT_FAILURE); 166 | } 167 | } 168 | 169 | void Bitmap::CopyPixels(const Bitmap* src, int tx, int ty) 170 | { 171 | for (int y = 0; y < src->height; ++y) 172 | for (int x = 0; x < src->width; ++x) 173 | data[(ty + y) * width + (tx + x)] = src->data[y * src->width + x]; 174 | } 175 | 176 | void Bitmap::CopyPixelsRot(const Bitmap* src, int tx, int ty) 177 | { 178 | int r = src->height - 1; 179 | for (int y = 0; y < src->width; ++y) 180 | for (int x = 0; x < src->height; ++x) 181 | data[(ty + y) * width + (tx + x)] = src->data[(r - x) * src->width + y]; 182 | } 183 | 184 | bool Bitmap::Equals(const Bitmap* other) const 185 | { 186 | if (width == other->width && height == other->height) 187 | return memcmp(data, other->data, sizeof(uint32_t) * width * height) == 0; 188 | return false; 189 | } 190 | -------------------------------------------------------------------------------- /crunch/bitmap.hpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #ifndef bitmap_hpp 28 | #define bitmap_hpp 29 | 30 | #include 31 | #include 32 | #include 33 | 34 | using namespace std; 35 | 36 | struct Bitmap 37 | { 38 | string name; 39 | int width; 40 | int height; 41 | int frameX; 42 | int frameY; 43 | int frameW; 44 | int frameH; 45 | uint32_t* data; 46 | size_t hashValue; 47 | Bitmap(const string& file, const string& name, bool premultiply, bool trim); 48 | Bitmap(int width, int height); 49 | ~Bitmap(); 50 | void SaveAs(const string& file); 51 | void CopyPixels(const Bitmap* src, int tx, int ty); 52 | void CopyPixelsRot(const Bitmap* src, int tx, int ty); 53 | bool Equals(const Bitmap* other) const; 54 | }; 55 | 56 | #endif 57 | -------------------------------------------------------------------------------- /crunch/hash.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #include "hash.hpp" 28 | #include 29 | #include 30 | #include 31 | #include 32 | #include "tinydir.h" 33 | #include "str.hpp" 34 | 35 | template 36 | void HashCombine(std::size_t& hash, const T& v) 37 | { 38 | std::hash hasher; 39 | hash ^= hasher(v) + 0x9e3779b9 + (hash<<6) + (hash>>2); 40 | } 41 | void HashCombine(std::size_t& hash, size_t v) 42 | { 43 | hash ^= v + 0x9e3779b9 + (hash<<6) + (hash>>2); 44 | } 45 | 46 | void HashString(size_t& hash, const string& str) 47 | { 48 | HashCombine(hash, str); 49 | } 50 | 51 | void HashFile(size_t& hash, const string& file) 52 | { 53 | ifstream stream(file, ios::binary | ios::ate); 54 | streamsize size = stream.tellg(); 55 | stream.seekg(0, ios::beg); 56 | vector buffer(size + 1); 57 | if (!stream.read(buffer.data(), size)) 58 | { 59 | cerr << "failed to read file: " << file << endl; 60 | exit(EXIT_FAILURE); 61 | } 62 | buffer[size] = '\0'; 63 | string text(buffer.begin(), buffer.end()); 64 | HashCombine(hash, text); 65 | } 66 | 67 | void HashFiles(size_t& hash, const string& root) 68 | { 69 | static string dot1 = "."; 70 | static string dot2 = ".."; 71 | 72 | tinydir_dir dir; 73 | tinydir_open(&dir, StrToPath(root).data()); 74 | 75 | while (dir.has_next) 76 | { 77 | tinydir_file file; 78 | tinydir_readfile(&dir, &file); 79 | 80 | if (file.is_dir) 81 | { 82 | if (dot1 != PathToStr(file.name) && dot2 != PathToStr(file.name)) 83 | HashFiles(hash, PathToStr(file.path)); 84 | } 85 | else if (PathToStr(file.extension) == "png") 86 | HashFile(hash, PathToStr(file.path)); 87 | 88 | tinydir_next(&dir); 89 | } 90 | 91 | tinydir_close(&dir); 92 | } 93 | 94 | void HashData(size_t& hash, const char* data, size_t size) 95 | { 96 | string str(data, size); 97 | HashCombine(hash, str); 98 | } 99 | 100 | bool LoadHash(size_t& hash, const string& file) 101 | { 102 | ifstream stream(file); 103 | if (stream) 104 | { 105 | stringstream ss; 106 | ss << stream.rdbuf(); 107 | ss >> hash; 108 | return true; 109 | } 110 | return false; 111 | } 112 | 113 | void SaveHash(size_t hash, const string& file) 114 | { 115 | ofstream stream(file); 116 | stream << hash; 117 | } 118 | -------------------------------------------------------------------------------- /crunch/hash.hpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #ifndef hash_hpp 28 | #define hash_hpp 29 | 30 | #include 31 | using namespace std; 32 | 33 | template 34 | void HashCombine(std::size_t& hash, const T& v); 35 | void HashCombine(std::size_t& hash, size_t v); 36 | void HashString(size_t& hash, const string& str); 37 | void HashFile(size_t& hash, const string& file); 38 | void HashFiles(size_t& hash, const string& root); 39 | void HashData(size_t& hash, const char* data, size_t size); 40 | bool LoadHash(size_t& hash, const string& file); 41 | void SaveHash(size_t hash, const string& file); 42 | 43 | #endif 44 | -------------------------------------------------------------------------------- /crunch/lodepng.h: -------------------------------------------------------------------------------- 1 | /* 2 | LodePNG version 20161127 3 | 4 | Copyright (c) 2005-2016 Lode Vandevenne 5 | 6 | This software is provided 'as-is', without any express or implied 7 | warranty. In no event will the authors be held liable for any damages 8 | arising from the use of this software. 9 | 10 | Permission is granted to anyone to use this software for any purpose, 11 | including commercial applications, and to alter it and redistribute it 12 | freely, subject to the following restrictions: 13 | 14 | 1. The origin of this software must not be misrepresented; you must not 15 | claim that you wrote the original software. If you use this software 16 | in a product, an acknowledgment in the product documentation would be 17 | appreciated but is not required. 18 | 19 | 2. Altered source versions must be plainly marked as such, and must not be 20 | misrepresented as being the original software. 21 | 22 | 3. This notice may not be removed or altered from any source 23 | distribution. 24 | */ 25 | 26 | #ifndef LODEPNG_H 27 | #define LODEPNG_H 28 | 29 | #include /*for size_t*/ 30 | 31 | extern const char* LODEPNG_VERSION_STRING; 32 | 33 | /* 34 | The following #defines are used to create code sections. They can be disabled 35 | to disable code sections, which can give faster compile time and smaller binary. 36 | The "NO_COMPILE" defines are designed to be used to pass as defines to the 37 | compiler command to disable them without modifying this header, e.g. 38 | -DLODEPNG_NO_COMPILE_ZLIB for gcc. 39 | In addition to those below, you can also define LODEPNG_NO_COMPILE_CRC to 40 | allow implementing a custom lodepng_crc32. 41 | */ 42 | /*deflate & zlib. If disabled, you must specify alternative zlib functions in 43 | the custom_zlib field of the compress and decompress settings*/ 44 | #ifndef LODEPNG_NO_COMPILE_ZLIB 45 | #define LODEPNG_COMPILE_ZLIB 46 | #endif 47 | /*png encoder and png decoder*/ 48 | #ifndef LODEPNG_NO_COMPILE_PNG 49 | #define LODEPNG_COMPILE_PNG 50 | #endif 51 | /*deflate&zlib decoder and png decoder*/ 52 | #ifndef LODEPNG_NO_COMPILE_DECODER 53 | #define LODEPNG_COMPILE_DECODER 54 | #endif 55 | /*deflate&zlib encoder and png encoder*/ 56 | #ifndef LODEPNG_NO_COMPILE_ENCODER 57 | #define LODEPNG_COMPILE_ENCODER 58 | #endif 59 | /*the optional built in harddisk file loading and saving functions*/ 60 | #ifndef LODEPNG_NO_COMPILE_DISK 61 | #define LODEPNG_COMPILE_DISK 62 | #endif 63 | /*support for chunks other than IHDR, IDAT, PLTE, tRNS, IEND: ancillary and unknown chunks*/ 64 | #ifndef LODEPNG_NO_COMPILE_ANCILLARY_CHUNKS 65 | #define LODEPNG_COMPILE_ANCILLARY_CHUNKS 66 | #endif 67 | /*ability to convert error numerical codes to English text string*/ 68 | #ifndef LODEPNG_NO_COMPILE_ERROR_TEXT 69 | #define LODEPNG_COMPILE_ERROR_TEXT 70 | #endif 71 | /*Compile the default allocators (C's free, malloc and realloc). If you disable this, 72 | you can define the functions lodepng_free, lodepng_malloc and lodepng_realloc in your 73 | source files with custom allocators.*/ 74 | #ifndef LODEPNG_NO_COMPILE_ALLOCATORS 75 | #define LODEPNG_COMPILE_ALLOCATORS 76 | #endif 77 | /*compile the C++ version (you can disable the C++ wrapper here even when compiling for C++)*/ 78 | #ifdef __cplusplus 79 | #ifndef LODEPNG_NO_COMPILE_CPP 80 | #define LODEPNG_COMPILE_CPP 81 | #endif 82 | #endif 83 | 84 | #ifdef LODEPNG_COMPILE_CPP 85 | #include 86 | #include 87 | #endif /*LODEPNG_COMPILE_CPP*/ 88 | 89 | #ifdef LODEPNG_COMPILE_PNG 90 | /*The PNG color types (also used for raw).*/ 91 | typedef enum LodePNGColorType 92 | { 93 | LCT_GREY = 0, /*greyscale: 1,2,4,8,16 bit*/ 94 | LCT_RGB = 2, /*RGB: 8,16 bit*/ 95 | LCT_PALETTE = 3, /*palette: 1,2,4,8 bit*/ 96 | LCT_GREY_ALPHA = 4, /*greyscale with alpha: 8,16 bit*/ 97 | LCT_RGBA = 6 /*RGB with alpha: 8,16 bit*/ 98 | } LodePNGColorType; 99 | 100 | #ifdef LODEPNG_COMPILE_DECODER 101 | /* 102 | Converts PNG data in memory to raw pixel data. 103 | out: Output parameter. Pointer to buffer that will contain the raw pixel data. 104 | After decoding, its size is w * h * (bytes per pixel) bytes larger than 105 | initially. Bytes per pixel depends on colortype and bitdepth. 106 | Must be freed after usage with free(*out). 107 | Note: for 16-bit per channel colors, uses big endian format like PNG does. 108 | w: Output parameter. Pointer to width of pixel data. 109 | h: Output parameter. Pointer to height of pixel data. 110 | in: Memory buffer with the PNG file. 111 | insize: size of the in buffer. 112 | colortype: the desired color type for the raw output image. See explanation on PNG color types. 113 | bitdepth: the desired bit depth for the raw output image. See explanation on PNG color types. 114 | Return value: LodePNG error code (0 means no error). 115 | */ 116 | unsigned lodepng_decode_memory(unsigned char** out, unsigned* w, unsigned* h, 117 | const unsigned char* in, size_t insize, 118 | LodePNGColorType colortype, unsigned bitdepth); 119 | 120 | /*Same as lodepng_decode_memory, but always decodes to 32-bit RGBA raw image*/ 121 | unsigned lodepng_decode32(unsigned char** out, unsigned* w, unsigned* h, 122 | const unsigned char* in, size_t insize); 123 | 124 | /*Same as lodepng_decode_memory, but always decodes to 24-bit RGB raw image*/ 125 | unsigned lodepng_decode24(unsigned char** out, unsigned* w, unsigned* h, 126 | const unsigned char* in, size_t insize); 127 | 128 | #ifdef LODEPNG_COMPILE_DISK 129 | /* 130 | Load PNG from disk, from file with given name. 131 | Same as the other decode functions, but instead takes a filename as input. 132 | */ 133 | unsigned lodepng_decode_file(unsigned char** out, unsigned* w, unsigned* h, 134 | const char* filename, 135 | LodePNGColorType colortype, unsigned bitdepth); 136 | 137 | /*Same as lodepng_decode_file, but always decodes to 32-bit RGBA raw image.*/ 138 | unsigned lodepng_decode32_file(unsigned char** out, unsigned* w, unsigned* h, 139 | const char* filename); 140 | 141 | /*Same as lodepng_decode_file, but always decodes to 24-bit RGB raw image.*/ 142 | unsigned lodepng_decode24_file(unsigned char** out, unsigned* w, unsigned* h, 143 | const char* filename); 144 | #endif /*LODEPNG_COMPILE_DISK*/ 145 | #endif /*LODEPNG_COMPILE_DECODER*/ 146 | 147 | 148 | #ifdef LODEPNG_COMPILE_ENCODER 149 | /* 150 | Converts raw pixel data into a PNG image in memory. The colortype and bitdepth 151 | of the output PNG image cannot be chosen, they are automatically determined 152 | by the colortype, bitdepth and content of the input pixel data. 153 | Note: for 16-bit per channel colors, needs big endian format like PNG does. 154 | out: Output parameter. Pointer to buffer that will contain the PNG image data. 155 | Must be freed after usage with free(*out). 156 | outsize: Output parameter. Pointer to the size in bytes of the out buffer. 157 | image: The raw pixel data to encode. The size of this buffer should be 158 | w * h * (bytes per pixel), bytes per pixel depends on colortype and bitdepth. 159 | w: width of the raw pixel data in pixels. 160 | h: height of the raw pixel data in pixels. 161 | colortype: the color type of the raw input image. See explanation on PNG color types. 162 | bitdepth: the bit depth of the raw input image. See explanation on PNG color types. 163 | Return value: LodePNG error code (0 means no error). 164 | */ 165 | unsigned lodepng_encode_memory(unsigned char** out, size_t* outsize, 166 | const unsigned char* image, unsigned w, unsigned h, 167 | LodePNGColorType colortype, unsigned bitdepth); 168 | 169 | /*Same as lodepng_encode_memory, but always encodes from 32-bit RGBA raw image.*/ 170 | unsigned lodepng_encode32(unsigned char** out, size_t* outsize, 171 | const unsigned char* image, unsigned w, unsigned h); 172 | 173 | /*Same as lodepng_encode_memory, but always encodes from 24-bit RGB raw image.*/ 174 | unsigned lodepng_encode24(unsigned char** out, size_t* outsize, 175 | const unsigned char* image, unsigned w, unsigned h); 176 | 177 | #ifdef LODEPNG_COMPILE_DISK 178 | /* 179 | Converts raw pixel data into a PNG file on disk. 180 | Same as the other encode functions, but instead takes a filename as output. 181 | NOTE: This overwrites existing files without warning! 182 | */ 183 | unsigned lodepng_encode_file(const char* filename, 184 | const unsigned char* image, unsigned w, unsigned h, 185 | LodePNGColorType colortype, unsigned bitdepth); 186 | 187 | /*Same as lodepng_encode_file, but always encodes from 32-bit RGBA raw image.*/ 188 | unsigned lodepng_encode32_file(const char* filename, 189 | const unsigned char* image, unsigned w, unsigned h); 190 | 191 | /*Same as lodepng_encode_file, but always encodes from 24-bit RGB raw image.*/ 192 | unsigned lodepng_encode24_file(const char* filename, 193 | const unsigned char* image, unsigned w, unsigned h); 194 | #endif /*LODEPNG_COMPILE_DISK*/ 195 | #endif /*LODEPNG_COMPILE_ENCODER*/ 196 | 197 | 198 | #ifdef LODEPNG_COMPILE_CPP 199 | namespace lodepng 200 | { 201 | #ifdef LODEPNG_COMPILE_DECODER 202 | /*Same as lodepng_decode_memory, but decodes to an std::vector. The colortype 203 | is the format to output the pixels to. Default is RGBA 8-bit per channel.*/ 204 | unsigned decode(std::vector& out, unsigned& w, unsigned& h, 205 | const unsigned char* in, size_t insize, 206 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 207 | unsigned decode(std::vector& out, unsigned& w, unsigned& h, 208 | const std::vector& in, 209 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 210 | #ifdef LODEPNG_COMPILE_DISK 211 | /* 212 | Converts PNG file from disk to raw pixel data in memory. 213 | Same as the other decode functions, but instead takes a filename as input. 214 | */ 215 | unsigned decode(std::vector& out, unsigned& w, unsigned& h, 216 | const std::string& filename, 217 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 218 | #endif /* LODEPNG_COMPILE_DISK */ 219 | #endif /* LODEPNG_COMPILE_DECODER */ 220 | 221 | #ifdef LODEPNG_COMPILE_ENCODER 222 | /*Same as lodepng_encode_memory, but encodes to an std::vector. colortype 223 | is that of the raw input data. The output PNG color type will be auto chosen.*/ 224 | unsigned encode(std::vector& out, 225 | const unsigned char* in, unsigned w, unsigned h, 226 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 227 | unsigned encode(std::vector& out, 228 | const std::vector& in, unsigned w, unsigned h, 229 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 230 | #ifdef LODEPNG_COMPILE_DISK 231 | /* 232 | Converts 32-bit RGBA raw pixel data into a PNG file on disk. 233 | Same as the other encode functions, but instead takes a filename as output. 234 | NOTE: This overwrites existing files without warning! 235 | */ 236 | unsigned encode(const std::string& filename, 237 | const unsigned char* in, unsigned w, unsigned h, 238 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 239 | unsigned encode(const std::string& filename, 240 | const std::vector& in, unsigned w, unsigned h, 241 | LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); 242 | #endif /* LODEPNG_COMPILE_DISK */ 243 | #endif /* LODEPNG_COMPILE_ENCODER */ 244 | } /* namespace lodepng */ 245 | #endif /*LODEPNG_COMPILE_CPP*/ 246 | #endif /*LODEPNG_COMPILE_PNG*/ 247 | 248 | #ifdef LODEPNG_COMPILE_ERROR_TEXT 249 | /*Returns an English description of the numerical error code.*/ 250 | const char* lodepng_error_text(unsigned code); 251 | #endif /*LODEPNG_COMPILE_ERROR_TEXT*/ 252 | 253 | #ifdef LODEPNG_COMPILE_DECODER 254 | /*Settings for zlib decompression*/ 255 | typedef struct LodePNGDecompressSettings LodePNGDecompressSettings; 256 | struct LodePNGDecompressSettings 257 | { 258 | unsigned ignore_adler32; /*if 1, continue and don't give an error message if the Adler32 checksum is corrupted*/ 259 | 260 | /*use custom zlib decoder instead of built in one (default: null)*/ 261 | unsigned (*custom_zlib)(unsigned char**, size_t*, 262 | const unsigned char*, size_t, 263 | const LodePNGDecompressSettings*); 264 | /*use custom deflate decoder instead of built in one (default: null) 265 | if custom_zlib is used, custom_deflate is ignored since only the built in 266 | zlib function will call custom_deflate*/ 267 | unsigned (*custom_inflate)(unsigned char**, size_t*, 268 | const unsigned char*, size_t, 269 | const LodePNGDecompressSettings*); 270 | 271 | const void* custom_context; /*optional custom settings for custom functions*/ 272 | }; 273 | 274 | extern const LodePNGDecompressSettings lodepng_default_decompress_settings; 275 | void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings); 276 | #endif /*LODEPNG_COMPILE_DECODER*/ 277 | 278 | #ifdef LODEPNG_COMPILE_ENCODER 279 | /* 280 | Settings for zlib compression. Tweaking these settings tweaks the balance 281 | between speed and compression ratio. 282 | */ 283 | typedef struct LodePNGCompressSettings LodePNGCompressSettings; 284 | struct LodePNGCompressSettings /*deflate = compress*/ 285 | { 286 | /*LZ77 related settings*/ 287 | unsigned btype; /*the block type for LZ (0, 1, 2 or 3, see zlib standard). Should be 2 for proper compression.*/ 288 | unsigned use_lz77; /*whether or not to use LZ77. Should be 1 for proper compression.*/ 289 | unsigned windowsize; /*must be a power of two <= 32768. higher compresses more but is slower. Default value: 2048.*/ 290 | unsigned minmatch; /*mininum lz77 length. 3 is normally best, 6 can be better for some PNGs. Default: 0*/ 291 | unsigned nicematch; /*stop searching if >= this length found. Set to 258 for best compression. Default: 128*/ 292 | unsigned lazymatching; /*use lazy matching: better compression but a bit slower. Default: true*/ 293 | 294 | /*use custom zlib encoder instead of built in one (default: null)*/ 295 | unsigned (*custom_zlib)(unsigned char**, size_t*, 296 | const unsigned char*, size_t, 297 | const LodePNGCompressSettings*); 298 | /*use custom deflate encoder instead of built in one (default: null) 299 | if custom_zlib is used, custom_deflate is ignored since only the built in 300 | zlib function will call custom_deflate*/ 301 | unsigned (*custom_deflate)(unsigned char**, size_t*, 302 | const unsigned char*, size_t, 303 | const LodePNGCompressSettings*); 304 | 305 | const void* custom_context; /*optional custom settings for custom functions*/ 306 | }; 307 | 308 | extern const LodePNGCompressSettings lodepng_default_compress_settings; 309 | void lodepng_compress_settings_init(LodePNGCompressSettings* settings); 310 | #endif /*LODEPNG_COMPILE_ENCODER*/ 311 | 312 | #ifdef LODEPNG_COMPILE_PNG 313 | /* 314 | Color mode of an image. Contains all information required to decode the pixel 315 | bits to RGBA colors. This information is the same as used in the PNG file 316 | format, and is used both for PNG and raw image data in LodePNG. 317 | */ 318 | typedef struct LodePNGColorMode 319 | { 320 | /*header (IHDR)*/ 321 | LodePNGColorType colortype; /*color type, see PNG standard or documentation further in this header file*/ 322 | unsigned bitdepth; /*bits per sample, see PNG standard or documentation further in this header file*/ 323 | 324 | /* 325 | palette (PLTE and tRNS) 326 | 327 | Dynamically allocated with the colors of the palette, including alpha. 328 | When encoding a PNG, to store your colors in the palette of the LodePNGColorMode, first use 329 | lodepng_palette_clear, then for each color use lodepng_palette_add. 330 | If you encode an image without alpha with palette, don't forget to put value 255 in each A byte of the palette. 331 | 332 | When decoding, by default you can ignore this palette, since LodePNG already 333 | fills the palette colors in the pixels of the raw RGBA output. 334 | 335 | The palette is only supported for color type 3. 336 | */ 337 | unsigned char* palette; /*palette in RGBARGBA... order. When allocated, must be either 0, or have size 1024*/ 338 | size_t palettesize; /*palette size in number of colors (amount of bytes is 4 * palettesize)*/ 339 | 340 | /* 341 | transparent color key (tRNS) 342 | 343 | This color uses the same bit depth as the bitdepth value in this struct, which can be 1-bit to 16-bit. 344 | For greyscale PNGs, r, g and b will all 3 be set to the same. 345 | 346 | When decoding, by default you can ignore this information, since LodePNG sets 347 | pixels with this key to transparent already in the raw RGBA output. 348 | 349 | The color key is only supported for color types 0 and 2. 350 | */ 351 | unsigned key_defined; /*is a transparent color key given? 0 = false, 1 = true*/ 352 | unsigned key_r; /*red/greyscale component of color key*/ 353 | unsigned key_g; /*green component of color key*/ 354 | unsigned key_b; /*blue component of color key*/ 355 | } LodePNGColorMode; 356 | 357 | /*init, cleanup and copy functions to use with this struct*/ 358 | void lodepng_color_mode_init(LodePNGColorMode* info); 359 | void lodepng_color_mode_cleanup(LodePNGColorMode* info); 360 | /*return value is error code (0 means no error)*/ 361 | unsigned lodepng_color_mode_copy(LodePNGColorMode* dest, const LodePNGColorMode* source); 362 | 363 | void lodepng_palette_clear(LodePNGColorMode* info); 364 | /*add 1 color to the palette*/ 365 | unsigned lodepng_palette_add(LodePNGColorMode* info, 366 | unsigned char r, unsigned char g, unsigned char b, unsigned char a); 367 | 368 | /*get the total amount of bits per pixel, based on colortype and bitdepth in the struct*/ 369 | unsigned lodepng_get_bpp(const LodePNGColorMode* info); 370 | /*get the amount of color channels used, based on colortype in the struct. 371 | If a palette is used, it counts as 1 channel.*/ 372 | unsigned lodepng_get_channels(const LodePNGColorMode* info); 373 | /*is it a greyscale type? (only colortype 0 or 4)*/ 374 | unsigned lodepng_is_greyscale_type(const LodePNGColorMode* info); 375 | /*has it got an alpha channel? (only colortype 2 or 6)*/ 376 | unsigned lodepng_is_alpha_type(const LodePNGColorMode* info); 377 | /*has it got a palette? (only colortype 3)*/ 378 | unsigned lodepng_is_palette_type(const LodePNGColorMode* info); 379 | /*only returns true if there is a palette and there is a value in the palette with alpha < 255. 380 | Loops through the palette to check this.*/ 381 | unsigned lodepng_has_palette_alpha(const LodePNGColorMode* info); 382 | /* 383 | Check if the given color info indicates the possibility of having non-opaque pixels in the PNG image. 384 | Returns true if the image can have translucent or invisible pixels (it still be opaque if it doesn't use such pixels). 385 | Returns false if the image can only have opaque pixels. 386 | In detail, it returns true only if it's a color type with alpha, or has a palette with non-opaque values, 387 | or if "key_defined" is true. 388 | */ 389 | unsigned lodepng_can_have_alpha(const LodePNGColorMode* info); 390 | /*Returns the byte size of a raw image buffer with given width, height and color mode*/ 391 | size_t lodepng_get_raw_size(unsigned w, unsigned h, const LodePNGColorMode* color); 392 | 393 | #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS 394 | /*The information of a Time chunk in PNG.*/ 395 | typedef struct LodePNGTime 396 | { 397 | unsigned year; /*2 bytes used (0-65535)*/ 398 | unsigned month; /*1-12*/ 399 | unsigned day; /*1-31*/ 400 | unsigned hour; /*0-23*/ 401 | unsigned minute; /*0-59*/ 402 | unsigned second; /*0-60 (to allow for leap seconds)*/ 403 | } LodePNGTime; 404 | #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ 405 | 406 | /*Information about the PNG image, except pixels, width and height.*/ 407 | typedef struct LodePNGInfo 408 | { 409 | /*header (IHDR), palette (PLTE) and transparency (tRNS) chunks*/ 410 | unsigned compression_method;/*compression method of the original file. Always 0.*/ 411 | unsigned filter_method; /*filter method of the original file*/ 412 | unsigned interlace_method; /*interlace method of the original file*/ 413 | LodePNGColorMode color; /*color type and bits, palette and transparency of the PNG file*/ 414 | 415 | #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS 416 | /* 417 | suggested background color chunk (bKGD) 418 | This color uses the same color mode as the PNG (except alpha channel), which can be 1-bit to 16-bit. 419 | 420 | For greyscale PNGs, r, g and b will all 3 be set to the same. When encoding 421 | the encoder writes the red one. For palette PNGs: When decoding, the RGB value 422 | will be stored, not a palette index. But when encoding, specify the index of 423 | the palette in background_r, the other two are then ignored. 424 | 425 | The decoder does not use this background color to edit the color of pixels. 426 | */ 427 | unsigned background_defined; /*is a suggested background color given?*/ 428 | unsigned background_r; /*red component of suggested background color*/ 429 | unsigned background_g; /*green component of suggested background color*/ 430 | unsigned background_b; /*blue component of suggested background color*/ 431 | 432 | /* 433 | non-international text chunks (tEXt and zTXt) 434 | 435 | The char** arrays each contain num strings. The actual messages are in 436 | text_strings, while text_keys are keywords that give a short description what 437 | the actual text represents, e.g. Title, Author, Description, or anything else. 438 | 439 | A keyword is minimum 1 character and maximum 79 characters long. It's 440 | discouraged to use a single line length longer than 79 characters for texts. 441 | 442 | Don't allocate these text buffers yourself. Use the init/cleanup functions 443 | correctly and use lodepng_add_text and lodepng_clear_text. 444 | */ 445 | size_t text_num; /*the amount of texts in these char** buffers (there may be more texts in itext)*/ 446 | char** text_keys; /*the keyword of a text chunk (e.g. "Comment")*/ 447 | char** text_strings; /*the actual text*/ 448 | 449 | /* 450 | international text chunks (iTXt) 451 | Similar to the non-international text chunks, but with additional strings 452 | "langtags" and "transkeys". 453 | */ 454 | size_t itext_num; /*the amount of international texts in this PNG*/ 455 | char** itext_keys; /*the English keyword of the text chunk (e.g. "Comment")*/ 456 | char** itext_langtags; /*language tag for this text's language, ISO/IEC 646 string, e.g. ISO 639 language tag*/ 457 | char** itext_transkeys; /*keyword translated to the international language - UTF-8 string*/ 458 | char** itext_strings; /*the actual international text - UTF-8 string*/ 459 | 460 | /*time chunk (tIME)*/ 461 | unsigned time_defined; /*set to 1 to make the encoder generate a tIME chunk*/ 462 | LodePNGTime time; 463 | 464 | /*phys chunk (pHYs)*/ 465 | unsigned phys_defined; /*if 0, there is no pHYs chunk and the values below are undefined, if 1 else there is one*/ 466 | unsigned phys_x; /*pixels per unit in x direction*/ 467 | unsigned phys_y; /*pixels per unit in y direction*/ 468 | unsigned phys_unit; /*may be 0 (unknown unit) or 1 (metre)*/ 469 | 470 | /* 471 | unknown chunks 472 | There are 3 buffers, one for each position in the PNG where unknown chunks can appear 473 | each buffer contains all unknown chunks for that position consecutively 474 | The 3 buffers are the unknown chunks between certain critical chunks: 475 | 0: IHDR-PLTE, 1: PLTE-IDAT, 2: IDAT-IEND 476 | Do not allocate or traverse this data yourself. Use the chunk traversing functions declared 477 | later, such as lodepng_chunk_next and lodepng_chunk_append, to read/write this struct. 478 | */ 479 | unsigned char* unknown_chunks_data[3]; 480 | size_t unknown_chunks_size[3]; /*size in bytes of the unknown chunks, given for protection*/ 481 | #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ 482 | } LodePNGInfo; 483 | 484 | /*init, cleanup and copy functions to use with this struct*/ 485 | void lodepng_info_init(LodePNGInfo* info); 486 | void lodepng_info_cleanup(LodePNGInfo* info); 487 | /*return value is error code (0 means no error)*/ 488 | unsigned lodepng_info_copy(LodePNGInfo* dest, const LodePNGInfo* source); 489 | 490 | #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS 491 | void lodepng_clear_text(LodePNGInfo* info); /*use this to clear the texts again after you filled them in*/ 492 | unsigned lodepng_add_text(LodePNGInfo* info, const char* key, const char* str); /*push back both texts at once*/ 493 | 494 | void lodepng_clear_itext(LodePNGInfo* info); /*use this to clear the itexts again after you filled them in*/ 495 | unsigned lodepng_add_itext(LodePNGInfo* info, const char* key, const char* langtag, 496 | const char* transkey, const char* str); /*push back the 4 texts of 1 chunk at once*/ 497 | #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ 498 | 499 | /* 500 | Converts raw buffer from one color type to another color type, based on 501 | LodePNGColorMode structs to describe the input and output color type. 502 | See the reference manual at the end of this header file to see which color conversions are supported. 503 | return value = LodePNG error code (0 if all went ok, an error if the conversion isn't supported) 504 | The out buffer must have size (w * h * bpp + 7) / 8, where bpp is the bits per pixel 505 | of the output color type (lodepng_get_bpp). 506 | For < 8 bpp images, there should not be padding bits at the end of scanlines. 507 | For 16-bit per channel colors, uses big endian format like PNG does. 508 | Return value is LodePNG error code 509 | */ 510 | unsigned lodepng_convert(unsigned char* out, const unsigned char* in, 511 | const LodePNGColorMode* mode_out, const LodePNGColorMode* mode_in, 512 | unsigned w, unsigned h); 513 | 514 | #ifdef LODEPNG_COMPILE_DECODER 515 | /* 516 | Settings for the decoder. This contains settings for the PNG and the Zlib 517 | decoder, but not the Info settings from the Info structs. 518 | */ 519 | typedef struct LodePNGDecoderSettings 520 | { 521 | LodePNGDecompressSettings zlibsettings; /*in here is the setting to ignore Adler32 checksums*/ 522 | 523 | unsigned ignore_crc; /*ignore CRC checksums*/ 524 | 525 | unsigned color_convert; /*whether to convert the PNG to the color type you want. Default: yes*/ 526 | 527 | #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS 528 | unsigned read_text_chunks; /*if false but remember_unknown_chunks is true, they're stored in the unknown chunks*/ 529 | /*store all bytes from unknown chunks in the LodePNGInfo (off by default, useful for a png editor)*/ 530 | unsigned remember_unknown_chunks; 531 | #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ 532 | } LodePNGDecoderSettings; 533 | 534 | void lodepng_decoder_settings_init(LodePNGDecoderSettings* settings); 535 | #endif /*LODEPNG_COMPILE_DECODER*/ 536 | 537 | #ifdef LODEPNG_COMPILE_ENCODER 538 | /*automatically use color type with less bits per pixel if losslessly possible. Default: AUTO*/ 539 | typedef enum LodePNGFilterStrategy 540 | { 541 | /*every filter at zero*/ 542 | LFS_ZERO, 543 | /*Use filter that gives minimum sum, as described in the official PNG filter heuristic.*/ 544 | LFS_MINSUM, 545 | /*Use the filter type that gives smallest Shannon entropy for this scanline. Depending 546 | on the image, this is better or worse than minsum.*/ 547 | LFS_ENTROPY, 548 | /* 549 | Brute-force-search PNG filters by compressing each filter for each scanline. 550 | Experimental, very slow, and only rarely gives better compression than MINSUM. 551 | */ 552 | LFS_BRUTE_FORCE, 553 | /*use predefined_filters buffer: you specify the filter type for each scanline*/ 554 | LFS_PREDEFINED 555 | } LodePNGFilterStrategy; 556 | 557 | /*Gives characteristics about the colors of the image, which helps decide which color model to use for encoding. 558 | Used internally by default if "auto_convert" is enabled. Public because it's useful for custom algorithms.*/ 559 | typedef struct LodePNGColorProfile 560 | { 561 | unsigned colored; /*not greyscale*/ 562 | unsigned key; /*image is not opaque and color key is possible instead of full alpha*/ 563 | unsigned short key_r; /*key values, always as 16-bit, in 8-bit case the byte is duplicated, e.g. 65535 means 255*/ 564 | unsigned short key_g; 565 | unsigned short key_b; 566 | unsigned alpha; /*image is not opaque and alpha channel or alpha palette required*/ 567 | unsigned numcolors; /*amount of colors, up to 257. Not valid if bits == 16.*/ 568 | unsigned char palette[1024]; /*Remembers up to the first 256 RGBA colors, in no particular order*/ 569 | unsigned bits; /*bits per channel (not for palette). 1,2 or 4 for greyscale only. 16 if 16-bit per channel required.*/ 570 | } LodePNGColorProfile; 571 | 572 | void lodepng_color_profile_init(LodePNGColorProfile* profile); 573 | 574 | /*Get a LodePNGColorProfile of the image.*/ 575 | unsigned lodepng_get_color_profile(LodePNGColorProfile* profile, 576 | const unsigned char* image, unsigned w, unsigned h, 577 | const LodePNGColorMode* mode_in); 578 | /*The function LodePNG uses internally to decide the PNG color with auto_convert. 579 | Chooses an optimal color model, e.g. grey if only grey pixels, palette if < 256 colors, ...*/ 580 | unsigned lodepng_auto_choose_color(LodePNGColorMode* mode_out, 581 | const unsigned char* image, unsigned w, unsigned h, 582 | const LodePNGColorMode* mode_in); 583 | 584 | /*Settings for the encoder.*/ 585 | typedef struct LodePNGEncoderSettings 586 | { 587 | LodePNGCompressSettings zlibsettings; /*settings for the zlib encoder, such as window size, ...*/ 588 | 589 | unsigned auto_convert; /*automatically choose output PNG color type. Default: true*/ 590 | 591 | /*If true, follows the official PNG heuristic: if the PNG uses a palette or lower than 592 | 8 bit depth, set all filters to zero. Otherwise use the filter_strategy. Note that to 593 | completely follow the official PNG heuristic, filter_palette_zero must be true and 594 | filter_strategy must be LFS_MINSUM*/ 595 | unsigned filter_palette_zero; 596 | /*Which filter strategy to use when not using zeroes due to filter_palette_zero. 597 | Set filter_palette_zero to 0 to ensure always using your chosen strategy. Default: LFS_MINSUM*/ 598 | LodePNGFilterStrategy filter_strategy; 599 | /*used if filter_strategy is LFS_PREDEFINED. In that case, this must point to a buffer with 600 | the same length as the amount of scanlines in the image, and each value must <= 5. You 601 | have to cleanup this buffer, LodePNG will never free it. Don't forget that filter_palette_zero 602 | must be set to 0 to ensure this is also used on palette or low bitdepth images.*/ 603 | const unsigned char* predefined_filters; 604 | 605 | /*force creating a PLTE chunk if colortype is 2 or 6 (= a suggested palette). 606 | If colortype is 3, PLTE is _always_ created.*/ 607 | unsigned force_palette; 608 | #ifdef LODEPNG_COMPILE_ANCILLARY_CHUNKS 609 | /*add LodePNG identifier and version as a text chunk, for debugging*/ 610 | unsigned add_id; 611 | /*encode text chunks as zTXt chunks instead of tEXt chunks, and use compression in iTXt chunks*/ 612 | unsigned text_compression; 613 | #endif /*LODEPNG_COMPILE_ANCILLARY_CHUNKS*/ 614 | } LodePNGEncoderSettings; 615 | 616 | void lodepng_encoder_settings_init(LodePNGEncoderSettings* settings); 617 | #endif /*LODEPNG_COMPILE_ENCODER*/ 618 | 619 | 620 | #if defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) 621 | /*The settings, state and information for extended encoding and decoding.*/ 622 | typedef struct LodePNGState 623 | { 624 | #ifdef LODEPNG_COMPILE_DECODER 625 | LodePNGDecoderSettings decoder; /*the decoding settings*/ 626 | #endif /*LODEPNG_COMPILE_DECODER*/ 627 | #ifdef LODEPNG_COMPILE_ENCODER 628 | LodePNGEncoderSettings encoder; /*the encoding settings*/ 629 | #endif /*LODEPNG_COMPILE_ENCODER*/ 630 | LodePNGColorMode info_raw; /*specifies the format in which you would like to get the raw pixel buffer*/ 631 | LodePNGInfo info_png; /*info of the PNG image obtained after decoding*/ 632 | unsigned error; 633 | #ifdef LODEPNG_COMPILE_CPP 634 | /* For the lodepng::State subclass. */ 635 | virtual ~LodePNGState(){} 636 | #endif 637 | } LodePNGState; 638 | 639 | /*init, cleanup and copy functions to use with this struct*/ 640 | void lodepng_state_init(LodePNGState* state); 641 | void lodepng_state_cleanup(LodePNGState* state); 642 | void lodepng_state_copy(LodePNGState* dest, const LodePNGState* source); 643 | #endif /* defined(LODEPNG_COMPILE_DECODER) || defined(LODEPNG_COMPILE_ENCODER) */ 644 | 645 | #ifdef LODEPNG_COMPILE_DECODER 646 | /* 647 | Same as lodepng_decode_memory, but uses a LodePNGState to allow custom settings and 648 | getting much more information about the PNG image and color mode. 649 | */ 650 | unsigned lodepng_decode(unsigned char** out, unsigned* w, unsigned* h, 651 | LodePNGState* state, 652 | const unsigned char* in, size_t insize); 653 | 654 | /* 655 | Read the PNG header, but not the actual data. This returns only the information 656 | that is in the header chunk of the PNG, such as width, height and color type. The 657 | information is placed in the info_png field of the LodePNGState. 658 | */ 659 | unsigned lodepng_inspect(unsigned* w, unsigned* h, 660 | LodePNGState* state, 661 | const unsigned char* in, size_t insize); 662 | #endif /*LODEPNG_COMPILE_DECODER*/ 663 | 664 | 665 | #ifdef LODEPNG_COMPILE_ENCODER 666 | /*This function allocates the out buffer with standard malloc and stores the size in *outsize.*/ 667 | unsigned lodepng_encode(unsigned char** out, size_t* outsize, 668 | const unsigned char* image, unsigned w, unsigned h, 669 | LodePNGState* state); 670 | #endif /*LODEPNG_COMPILE_ENCODER*/ 671 | 672 | /* 673 | The lodepng_chunk functions are normally not needed, except to traverse the 674 | unknown chunks stored in the LodePNGInfo struct, or add new ones to it. 675 | It also allows traversing the chunks of an encoded PNG file yourself. 676 | 677 | PNG standard chunk naming conventions: 678 | First byte: uppercase = critical, lowercase = ancillary 679 | Second byte: uppercase = public, lowercase = private 680 | Third byte: must be uppercase 681 | Fourth byte: uppercase = unsafe to copy, lowercase = safe to copy 682 | */ 683 | 684 | /* 685 | Gets the length of the data of the chunk. Total chunk length has 12 bytes more. 686 | There must be at least 4 bytes to read from. If the result value is too large, 687 | it may be corrupt data. 688 | */ 689 | unsigned lodepng_chunk_length(const unsigned char* chunk); 690 | 691 | /*puts the 4-byte type in null terminated string*/ 692 | void lodepng_chunk_type(char type[5], const unsigned char* chunk); 693 | 694 | /*check if the type is the given type*/ 695 | unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type); 696 | 697 | /*0: it's one of the critical chunk types, 1: it's an ancillary chunk (see PNG standard)*/ 698 | unsigned char lodepng_chunk_ancillary(const unsigned char* chunk); 699 | 700 | /*0: public, 1: private (see PNG standard)*/ 701 | unsigned char lodepng_chunk_private(const unsigned char* chunk); 702 | 703 | /*0: the chunk is unsafe to copy, 1: the chunk is safe to copy (see PNG standard)*/ 704 | unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk); 705 | 706 | /*get pointer to the data of the chunk, where the input points to the header of the chunk*/ 707 | unsigned char* lodepng_chunk_data(unsigned char* chunk); 708 | const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk); 709 | 710 | /*returns 0 if the crc is correct, 1 if it's incorrect (0 for OK as usual!)*/ 711 | unsigned lodepng_chunk_check_crc(const unsigned char* chunk); 712 | 713 | /*generates the correct CRC from the data and puts it in the last 4 bytes of the chunk*/ 714 | void lodepng_chunk_generate_crc(unsigned char* chunk); 715 | 716 | /*iterate to next chunks. don't use on IEND chunk, as there is no next chunk then*/ 717 | unsigned char* lodepng_chunk_next(unsigned char* chunk); 718 | const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk); 719 | 720 | /* 721 | Appends chunk to the data in out. The given chunk should already have its chunk header. 722 | The out variable and outlength are updated to reflect the new reallocated buffer. 723 | Returns error code (0 if it went ok) 724 | */ 725 | unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk); 726 | 727 | /* 728 | Appends new chunk to out. The chunk to append is given by giving its length, type 729 | and data separately. The type is a 4-letter string. 730 | The out variable and outlength are updated to reflect the new reallocated buffer. 731 | Returne error code (0 if it went ok) 732 | */ 733 | unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length, 734 | const char* type, const unsigned char* data); 735 | 736 | 737 | /*Calculate CRC32 of buffer*/ 738 | unsigned lodepng_crc32(const unsigned char* buf, size_t len); 739 | #endif /*LODEPNG_COMPILE_PNG*/ 740 | 741 | 742 | #ifdef LODEPNG_COMPILE_ZLIB 743 | /* 744 | This zlib part can be used independently to zlib compress and decompress a 745 | buffer. It cannot be used to create gzip files however, and it only supports the 746 | part of zlib that is required for PNG, it does not support dictionaries. 747 | */ 748 | 749 | #ifdef LODEPNG_COMPILE_DECODER 750 | /*Inflate a buffer. Inflate is the decompression step of deflate. Out buffer must be freed after use.*/ 751 | unsigned lodepng_inflate(unsigned char** out, size_t* outsize, 752 | const unsigned char* in, size_t insize, 753 | const LodePNGDecompressSettings* settings); 754 | 755 | /* 756 | Decompresses Zlib data. Reallocates the out buffer and appends the data. The 757 | data must be according to the zlib specification. 758 | Either, *out must be NULL and *outsize must be 0, or, *out must be a valid 759 | buffer and *outsize its size in bytes. out must be freed by user after usage. 760 | */ 761 | unsigned lodepng_zlib_decompress(unsigned char** out, size_t* outsize, 762 | const unsigned char* in, size_t insize, 763 | const LodePNGDecompressSettings* settings); 764 | #endif /*LODEPNG_COMPILE_DECODER*/ 765 | 766 | #ifdef LODEPNG_COMPILE_ENCODER 767 | /* 768 | Compresses data with Zlib. Reallocates the out buffer and appends the data. 769 | Zlib adds a small header and trailer around the deflate data. 770 | The data is output in the format of the zlib specification. 771 | Either, *out must be NULL and *outsize must be 0, or, *out must be a valid 772 | buffer and *outsize its size in bytes. out must be freed by user after usage. 773 | */ 774 | unsigned lodepng_zlib_compress(unsigned char** out, size_t* outsize, 775 | const unsigned char* in, size_t insize, 776 | const LodePNGCompressSettings* settings); 777 | 778 | /* 779 | Find length-limited Huffman code for given frequencies. This function is in the 780 | public interface only for tests, it's used internally by lodepng_deflate. 781 | */ 782 | unsigned lodepng_huffman_code_lengths(unsigned* lengths, const unsigned* frequencies, 783 | size_t numcodes, unsigned maxbitlen); 784 | 785 | /*Compress a buffer with deflate. See RFC 1951. Out buffer must be freed after use.*/ 786 | unsigned lodepng_deflate(unsigned char** out, size_t* outsize, 787 | const unsigned char* in, size_t insize, 788 | const LodePNGCompressSettings* settings); 789 | 790 | #endif /*LODEPNG_COMPILE_ENCODER*/ 791 | #endif /*LODEPNG_COMPILE_ZLIB*/ 792 | 793 | #ifdef LODEPNG_COMPILE_DISK 794 | /* 795 | Load a file from disk into buffer. The function allocates the out buffer, and 796 | after usage you should free it. 797 | out: output parameter, contains pointer to loaded buffer. 798 | outsize: output parameter, size of the allocated out buffer 799 | filename: the path to the file to load 800 | return value: error code (0 means ok) 801 | */ 802 | unsigned lodepng_load_file(unsigned char** out, size_t* outsize, const char* filename); 803 | 804 | /* 805 | Save a file from buffer to disk. Warning, if it exists, this function overwrites 806 | the file without warning! 807 | buffer: the buffer to write 808 | buffersize: size of the buffer to write 809 | filename: the path to the file to save to 810 | return value: error code (0 means ok) 811 | */ 812 | unsigned lodepng_save_file(const unsigned char* buffer, size_t buffersize, const char* filename); 813 | #endif /*LODEPNG_COMPILE_DISK*/ 814 | 815 | #ifdef LODEPNG_COMPILE_CPP 816 | /* The LodePNG C++ wrapper uses std::vectors instead of manually allocated memory buffers. */ 817 | namespace lodepng 818 | { 819 | #ifdef LODEPNG_COMPILE_PNG 820 | class State : public LodePNGState 821 | { 822 | public: 823 | State(); 824 | State(const State& other); 825 | virtual ~State(); 826 | State& operator=(const State& other); 827 | }; 828 | 829 | #ifdef LODEPNG_COMPILE_DECODER 830 | /* Same as other lodepng::decode, but using a State for more settings and information. */ 831 | unsigned decode(std::vector& out, unsigned& w, unsigned& h, 832 | State& state, 833 | const unsigned char* in, size_t insize); 834 | unsigned decode(std::vector& out, unsigned& w, unsigned& h, 835 | State& state, 836 | const std::vector& in); 837 | #endif /*LODEPNG_COMPILE_DECODER*/ 838 | 839 | #ifdef LODEPNG_COMPILE_ENCODER 840 | /* Same as other lodepng::encode, but using a State for more settings and information. */ 841 | unsigned encode(std::vector& out, 842 | const unsigned char* in, unsigned w, unsigned h, 843 | State& state); 844 | unsigned encode(std::vector& out, 845 | const std::vector& in, unsigned w, unsigned h, 846 | State& state); 847 | #endif /*LODEPNG_COMPILE_ENCODER*/ 848 | 849 | #ifdef LODEPNG_COMPILE_DISK 850 | /* 851 | Load a file from disk into an std::vector. 852 | return value: error code (0 means ok) 853 | */ 854 | unsigned load_file(std::vector& buffer, const std::string& filename); 855 | 856 | /* 857 | Save the binary data in an std::vector to a file on disk. The file is overwritten 858 | without warning. 859 | */ 860 | unsigned save_file(const std::vector& buffer, const std::string& filename); 861 | #endif /* LODEPNG_COMPILE_DISK */ 862 | #endif /* LODEPNG_COMPILE_PNG */ 863 | 864 | #ifdef LODEPNG_COMPILE_ZLIB 865 | #ifdef LODEPNG_COMPILE_DECODER 866 | /* Zlib-decompress an unsigned char buffer */ 867 | unsigned decompress(std::vector& out, const unsigned char* in, size_t insize, 868 | const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); 869 | 870 | /* Zlib-decompress an std::vector */ 871 | unsigned decompress(std::vector& out, const std::vector& in, 872 | const LodePNGDecompressSettings& settings = lodepng_default_decompress_settings); 873 | #endif /* LODEPNG_COMPILE_DECODER */ 874 | 875 | #ifdef LODEPNG_COMPILE_ENCODER 876 | /* Zlib-compress an unsigned char buffer */ 877 | unsigned compress(std::vector& out, const unsigned char* in, size_t insize, 878 | const LodePNGCompressSettings& settings = lodepng_default_compress_settings); 879 | 880 | /* Zlib-compress an std::vector */ 881 | unsigned compress(std::vector& out, const std::vector& in, 882 | const LodePNGCompressSettings& settings = lodepng_default_compress_settings); 883 | #endif /* LODEPNG_COMPILE_ENCODER */ 884 | #endif /* LODEPNG_COMPILE_ZLIB */ 885 | } /* namespace lodepng */ 886 | #endif /*LODEPNG_COMPILE_CPP*/ 887 | 888 | /* 889 | TODO: 890 | [.] test if there are no memory leaks or security exploits - done a lot but needs to be checked often 891 | [.] check compatibility with various compilers - done but needs to be redone for every newer version 892 | [X] converting color to 16-bit per channel types 893 | [ ] read all public PNG chunk types (but never let the color profile and gamma ones touch RGB values) 894 | [ ] make sure encoder generates no chunks with size > (2^31)-1 895 | [ ] partial decoding (stream processing) 896 | [X] let the "isFullyOpaque" function check color keys and transparent palettes too 897 | [X] better name for the variables "codes", "codesD", "codelengthcodes", "clcl" and "lldl" 898 | [ ] don't stop decoding on errors like 69, 57, 58 (make warnings) 899 | [ ] make warnings like: oob palette, checksum fail, data after iend, wrong/unknown crit chunk, no null terminator in text, ... 900 | [ ] let the C++ wrapper catch exceptions coming from the standard library and return LodePNG error codes 901 | [ ] allow user to provide custom color conversion functions, e.g. for premultiplied alpha, padding bits or not, ... 902 | [ ] allow user to give data (void*) to custom allocator 903 | */ 904 | 905 | #endif /*LODEPNG_H inclusion guard*/ 906 | 907 | /* 908 | LodePNG Documentation 909 | --------------------- 910 | 911 | 0. table of contents 912 | -------------------- 913 | 914 | 1. about 915 | 1.1. supported features 916 | 1.2. features not supported 917 | 2. C and C++ version 918 | 3. security 919 | 4. decoding 920 | 5. encoding 921 | 6. color conversions 922 | 6.1. PNG color types 923 | 6.2. color conversions 924 | 6.3. padding bits 925 | 6.4. A note about 16-bits per channel and endianness 926 | 7. error values 927 | 8. chunks and PNG editing 928 | 9. compiler support 929 | 10. examples 930 | 10.1. decoder C++ example 931 | 10.2. decoder C example 932 | 11. state settings reference 933 | 12. changes 934 | 13. contact information 935 | 936 | 937 | 1. about 938 | -------- 939 | 940 | PNG is a file format to store raster images losslessly with good compression, 941 | supporting different color types and alpha channel. 942 | 943 | LodePNG is a PNG codec according to the Portable Network Graphics (PNG) 944 | Specification (Second Edition) - W3C Recommendation 10 November 2003. 945 | 946 | The specifications used are: 947 | 948 | *) Portable Network Graphics (PNG) Specification (Second Edition): 949 | http://www.w3.org/TR/2003/REC-PNG-20031110 950 | *) RFC 1950 ZLIB Compressed Data Format version 3.3: 951 | http://www.gzip.org/zlib/rfc-zlib.html 952 | *) RFC 1951 DEFLATE Compressed Data Format Specification ver 1.3: 953 | http://www.gzip.org/zlib/rfc-deflate.html 954 | 955 | The most recent version of LodePNG can currently be found at 956 | http://lodev.org/lodepng/ 957 | 958 | LodePNG works both in C (ISO C90) and C++, with a C++ wrapper that adds 959 | extra functionality. 960 | 961 | LodePNG exists out of two files: 962 | -lodepng.h: the header file for both C and C++ 963 | -lodepng.c(pp): give it the name lodepng.c or lodepng.cpp (or .cc) depending on your usage 964 | 965 | If you want to start using LodePNG right away without reading this doc, get the 966 | examples from the LodePNG website to see how to use it in code, or check the 967 | smaller examples in chapter 13 here. 968 | 969 | LodePNG is simple but only supports the basic requirements. To achieve 970 | simplicity, the following design choices were made: There are no dependencies 971 | on any external library. There are functions to decode and encode a PNG with 972 | a single function call, and extended versions of these functions taking a 973 | LodePNGState struct allowing to specify or get more information. By default 974 | the colors of the raw image are always RGB or RGBA, no matter what color type 975 | the PNG file uses. To read and write files, there are simple functions to 976 | convert the files to/from buffers in memory. 977 | 978 | This all makes LodePNG suitable for loading textures in games, demos and small 979 | programs, ... It's less suitable for full fledged image editors, loading PNGs 980 | over network (it requires all the image data to be available before decoding can 981 | begin), life-critical systems, ... 982 | 983 | 1.1. supported features 984 | ----------------------- 985 | 986 | The following features are supported by the decoder: 987 | 988 | *) decoding of PNGs with any color type, bit depth and interlace mode, to a 24- or 32-bit color raw image, 989 | or the same color type as the PNG 990 | *) encoding of PNGs, from any raw image to 24- or 32-bit color, or the same color type as the raw image 991 | *) Adam7 interlace and deinterlace for any color type 992 | *) loading the image from harddisk or decoding it from a buffer from other sources than harddisk 993 | *) support for alpha channels, including RGBA color model, translucent palettes and color keying 994 | *) zlib decompression (inflate) 995 | *) zlib compression (deflate) 996 | *) CRC32 and ADLER32 checksums 997 | *) handling of unknown chunks, allowing making a PNG editor that stores custom and unknown chunks. 998 | *) the following chunks are supported (generated/interpreted) by both encoder and decoder: 999 | IHDR: header information 1000 | PLTE: color palette 1001 | IDAT: pixel data 1002 | IEND: the final chunk 1003 | tRNS: transparency for palettized images 1004 | tEXt: textual information 1005 | zTXt: compressed textual information 1006 | iTXt: international textual information 1007 | bKGD: suggested background color 1008 | pHYs: physical dimensions 1009 | tIME: modification time 1010 | 1011 | 1.2. features not supported 1012 | --------------------------- 1013 | 1014 | The following features are _not_ supported: 1015 | 1016 | *) some features needed to make a conformant PNG-Editor might be still missing. 1017 | *) partial loading/stream processing. All data must be available and is processed in one call. 1018 | *) The following public chunks are not supported but treated as unknown chunks by LodePNG 1019 | cHRM, gAMA, iCCP, sRGB, sBIT, hIST, sPLT 1020 | Some of these are not supported on purpose: LodePNG wants to provide the RGB values 1021 | stored in the pixels, not values modified by system dependent gamma or color models. 1022 | 1023 | 1024 | 2. C and C++ version 1025 | -------------------- 1026 | 1027 | The C version uses buffers allocated with alloc that you need to free() 1028 | yourself. You need to use init and cleanup functions for each struct whenever 1029 | using a struct from the C version to avoid exploits and memory leaks. 1030 | 1031 | The C++ version has extra functions with std::vectors in the interface and the 1032 | lodepng::State class which is a LodePNGState with constructor and destructor. 1033 | 1034 | These files work without modification for both C and C++ compilers because all 1035 | the additional C++ code is in "#ifdef __cplusplus" blocks that make C-compilers 1036 | ignore it, and the C code is made to compile both with strict ISO C90 and C++. 1037 | 1038 | To use the C++ version, you need to rename the source file to lodepng.cpp 1039 | (instead of lodepng.c), and compile it with a C++ compiler. 1040 | 1041 | To use the C version, you need to rename the source file to lodepng.c (instead 1042 | of lodepng.cpp), and compile it with a C compiler. 1043 | 1044 | 1045 | 3. Security 1046 | ----------- 1047 | 1048 | Even if carefully designed, it's always possible that LodePNG contains possible 1049 | exploits. If you discover one, please let me know, and it will be fixed. 1050 | 1051 | When using LodePNG, care has to be taken with the C version of LodePNG, as well 1052 | as the C-style structs when working with C++. The following conventions are used 1053 | for all C-style structs: 1054 | 1055 | -if a struct has a corresponding init function, always call the init function when making a new one 1056 | -if a struct has a corresponding cleanup function, call it before the struct disappears to avoid memory leaks 1057 | -if a struct has a corresponding copy function, use the copy function instead of "=". 1058 | The destination must also be inited already. 1059 | 1060 | 1061 | 4. Decoding 1062 | ----------- 1063 | 1064 | Decoding converts a PNG compressed image to a raw pixel buffer. 1065 | 1066 | Most documentation on using the decoder is at its declarations in the header 1067 | above. For C, simple decoding can be done with functions such as 1068 | lodepng_decode32, and more advanced decoding can be done with the struct 1069 | LodePNGState and lodepng_decode. For C++, all decoding can be done with the 1070 | various lodepng::decode functions, and lodepng::State can be used for advanced 1071 | features. 1072 | 1073 | When using the LodePNGState, it uses the following fields for decoding: 1074 | *) LodePNGInfo info_png: it stores extra information about the PNG (the input) in here 1075 | *) LodePNGColorMode info_raw: here you can say what color mode of the raw image (the output) you want to get 1076 | *) LodePNGDecoderSettings decoder: you can specify a few extra settings for the decoder to use 1077 | 1078 | LodePNGInfo info_png 1079 | -------------------- 1080 | 1081 | After decoding, this contains extra information of the PNG image, except the actual 1082 | pixels, width and height because these are already gotten directly from the decoder 1083 | functions. 1084 | 1085 | It contains for example the original color type of the PNG image, text comments, 1086 | suggested background color, etc... More details about the LodePNGInfo struct are 1087 | at its declaration documentation. 1088 | 1089 | LodePNGColorMode info_raw 1090 | ------------------------- 1091 | 1092 | When decoding, here you can specify which color type you want 1093 | the resulting raw image to be. If this is different from the colortype of the 1094 | PNG, then the decoder will automatically convert the result. This conversion 1095 | always works, except if you want it to convert a color PNG to greyscale or to 1096 | a palette with missing colors. 1097 | 1098 | By default, 32-bit color is used for the result. 1099 | 1100 | LodePNGDecoderSettings decoder 1101 | ------------------------------ 1102 | 1103 | The settings can be used to ignore the errors created by invalid CRC and Adler32 1104 | chunks, and to disable the decoding of tEXt chunks. 1105 | 1106 | There's also a setting color_convert, true by default. If false, no conversion 1107 | is done, the resulting data will be as it was in the PNG (after decompression) 1108 | and you'll have to puzzle the colors of the pixels together yourself using the 1109 | color type information in the LodePNGInfo. 1110 | 1111 | 1112 | 5. Encoding 1113 | ----------- 1114 | 1115 | Encoding converts a raw pixel buffer to a PNG compressed image. 1116 | 1117 | Most documentation on using the encoder is at its declarations in the header 1118 | above. For C, simple encoding can be done with functions such as 1119 | lodepng_encode32, and more advanced decoding can be done with the struct 1120 | LodePNGState and lodepng_encode. For C++, all encoding can be done with the 1121 | various lodepng::encode functions, and lodepng::State can be used for advanced 1122 | features. 1123 | 1124 | Like the decoder, the encoder can also give errors. However it gives less errors 1125 | since the encoder input is trusted, the decoder input (a PNG image that could 1126 | be forged by anyone) is not trusted. 1127 | 1128 | When using the LodePNGState, it uses the following fields for encoding: 1129 | *) LodePNGInfo info_png: here you specify how you want the PNG (the output) to be. 1130 | *) LodePNGColorMode info_raw: here you say what color type of the raw image (the input) has 1131 | *) LodePNGEncoderSettings encoder: you can specify a few settings for the encoder to use 1132 | 1133 | LodePNGInfo info_png 1134 | -------------------- 1135 | 1136 | When encoding, you use this the opposite way as when decoding: for encoding, 1137 | you fill in the values you want the PNG to have before encoding. By default it's 1138 | not needed to specify a color type for the PNG since it's automatically chosen, 1139 | but it's possible to choose it yourself given the right settings. 1140 | 1141 | The encoder will not always exactly match the LodePNGInfo struct you give, 1142 | it tries as close as possible. Some things are ignored by the encoder. The 1143 | encoder uses, for example, the following settings from it when applicable: 1144 | colortype and bitdepth, text chunks, time chunk, the color key, the palette, the 1145 | background color, the interlace method, unknown chunks, ... 1146 | 1147 | When encoding to a PNG with colortype 3, the encoder will generate a PLTE chunk. 1148 | If the palette contains any colors for which the alpha channel is not 255 (so 1149 | there are translucent colors in the palette), it'll add a tRNS chunk. 1150 | 1151 | LodePNGColorMode info_raw 1152 | ------------------------- 1153 | 1154 | You specify the color type of the raw image that you give to the input here, 1155 | including a possible transparent color key and palette you happen to be using in 1156 | your raw image data. 1157 | 1158 | By default, 32-bit color is assumed, meaning your input has to be in RGBA 1159 | format with 4 bytes (unsigned chars) per pixel. 1160 | 1161 | LodePNGEncoderSettings encoder 1162 | ------------------------------ 1163 | 1164 | The following settings are supported (some are in sub-structs): 1165 | *) auto_convert: when this option is enabled, the encoder will 1166 | automatically choose the smallest possible color mode (including color key) that 1167 | can encode the colors of all pixels without information loss. 1168 | *) btype: the block type for LZ77. 0 = uncompressed, 1 = fixed huffman tree, 1169 | 2 = dynamic huffman tree (best compression). Should be 2 for proper 1170 | compression. 1171 | *) use_lz77: whether or not to use LZ77 for compressed block types. Should be 1172 | true for proper compression. 1173 | *) windowsize: the window size used by the LZ77 encoder (1 - 32768). Has value 1174 | 2048 by default, but can be set to 32768 for better, but slow, compression. 1175 | *) force_palette: if colortype is 2 or 6, you can make the encoder write a PLTE 1176 | chunk if force_palette is true. This can used as suggested palette to convert 1177 | to by viewers that don't support more than 256 colors (if those still exist) 1178 | *) add_id: add text chunk "Encoder: LodePNG " to the image. 1179 | *) text_compression: default 1. If 1, it'll store texts as zTXt instead of tEXt chunks. 1180 | zTXt chunks use zlib compression on the text. This gives a smaller result on 1181 | large texts but a larger result on small texts (such as a single program name). 1182 | It's all tEXt or all zTXt though, there's no separate setting per text yet. 1183 | 1184 | 1185 | 6. color conversions 1186 | -------------------- 1187 | 1188 | An important thing to note about LodePNG, is that the color type of the PNG, and 1189 | the color type of the raw image, are completely independent. By default, when 1190 | you decode a PNG, you get the result as a raw image in the color type you want, 1191 | no matter whether the PNG was encoded with a palette, greyscale or RGBA color. 1192 | And if you encode an image, by default LodePNG will automatically choose the PNG 1193 | color type that gives good compression based on the values of colors and amount 1194 | of colors in the image. It can be configured to let you control it instead as 1195 | well, though. 1196 | 1197 | To be able to do this, LodePNG does conversions from one color mode to another. 1198 | It can convert from almost any color type to any other color type, except the 1199 | following conversions: RGB to greyscale is not supported, and converting to a 1200 | palette when the palette doesn't have a required color is not supported. This is 1201 | not supported on purpose: this is information loss which requires a color 1202 | reduction algorithm that is beyong the scope of a PNG encoder (yes, RGB to grey 1203 | is easy, but there are multiple ways if you want to give some channels more 1204 | weight). 1205 | 1206 | By default, when decoding, you get the raw image in 32-bit RGBA or 24-bit RGB 1207 | color, no matter what color type the PNG has. And by default when encoding, 1208 | LodePNG automatically picks the best color model for the output PNG, and expects 1209 | the input image to be 32-bit RGBA or 24-bit RGB. So, unless you want to control 1210 | the color format of the images yourself, you can skip this chapter. 1211 | 1212 | 6.1. PNG color types 1213 | -------------------- 1214 | 1215 | A PNG image can have many color types, ranging from 1-bit color to 64-bit color, 1216 | as well as palettized color modes. After the zlib decompression and unfiltering 1217 | in the PNG image is done, the raw pixel data will have that color type and thus 1218 | a certain amount of bits per pixel. If you want the output raw image after 1219 | decoding to have another color type, a conversion is done by LodePNG. 1220 | 1221 | The PNG specification gives the following color types: 1222 | 1223 | 0: greyscale, bit depths 1, 2, 4, 8, 16 1224 | 2: RGB, bit depths 8 and 16 1225 | 3: palette, bit depths 1, 2, 4 and 8 1226 | 4: greyscale with alpha, bit depths 8 and 16 1227 | 6: RGBA, bit depths 8 and 16 1228 | 1229 | Bit depth is the amount of bits per pixel per color channel. So the total amount 1230 | of bits per pixel is: amount of channels * bitdepth. 1231 | 1232 | 6.2. color conversions 1233 | ---------------------- 1234 | 1235 | As explained in the sections about the encoder and decoder, you can specify 1236 | color types and bit depths in info_png and info_raw to change the default 1237 | behaviour. 1238 | 1239 | If, when decoding, you want the raw image to be something else than the default, 1240 | you need to set the color type and bit depth you want in the LodePNGColorMode, 1241 | or the parameters colortype and bitdepth of the simple decoding function. 1242 | 1243 | If, when encoding, you use another color type than the default in the raw input 1244 | image, you need to specify its color type and bit depth in the LodePNGColorMode 1245 | of the raw image, or use the parameters colortype and bitdepth of the simple 1246 | encoding function. 1247 | 1248 | If, when encoding, you don't want LodePNG to choose the output PNG color type 1249 | but control it yourself, you need to set auto_convert in the encoder settings 1250 | to false, and specify the color type you want in the LodePNGInfo of the 1251 | encoder (including palette: it can generate a palette if auto_convert is true, 1252 | otherwise not). 1253 | 1254 | If the input and output color type differ (whether user chosen or auto chosen), 1255 | LodePNG will do a color conversion, which follows the rules below, and may 1256 | sometimes result in an error. 1257 | 1258 | To avoid some confusion: 1259 | -the decoder converts from PNG to raw image 1260 | -the encoder converts from raw image to PNG 1261 | -the colortype and bitdepth in LodePNGColorMode info_raw, are those of the raw image 1262 | -the colortype and bitdepth in the color field of LodePNGInfo info_png, are those of the PNG 1263 | -when encoding, the color type in LodePNGInfo is ignored if auto_convert 1264 | is enabled, it is automatically generated instead 1265 | -when decoding, the color type in LodePNGInfo is set by the decoder to that of the original 1266 | PNG image, but it can be ignored since the raw image has the color type you requested instead 1267 | -if the color type of the LodePNGColorMode and PNG image aren't the same, a conversion 1268 | between the color types is done if the color types are supported. If it is not 1269 | supported, an error is returned. If the types are the same, no conversion is done. 1270 | -even though some conversions aren't supported, LodePNG supports loading PNGs from any 1271 | colortype and saving PNGs to any colortype, sometimes it just requires preparing 1272 | the raw image correctly before encoding. 1273 | -both encoder and decoder use the same color converter. 1274 | 1275 | Non supported color conversions: 1276 | -color to greyscale: no error is thrown, but the result will look ugly because 1277 | only the red channel is taken 1278 | -anything to palette when that palette does not have that color in it: in this 1279 | case an error is thrown 1280 | 1281 | Supported color conversions: 1282 | -anything to 8-bit RGB, 8-bit RGBA, 16-bit RGB, 16-bit RGBA 1283 | -any grey or grey+alpha, to grey or grey+alpha 1284 | -anything to a palette, as long as the palette has the requested colors in it 1285 | -removing alpha channel 1286 | -higher to smaller bitdepth, and vice versa 1287 | 1288 | If you want no color conversion to be done (e.g. for speed or control): 1289 | -In the encoder, you can make it save a PNG with any color type by giving the 1290 | raw color mode and LodePNGInfo the same color mode, and setting auto_convert to 1291 | false. 1292 | -In the decoder, you can make it store the pixel data in the same color type 1293 | as the PNG has, by setting the color_convert setting to false. Settings in 1294 | info_raw are then ignored. 1295 | 1296 | The function lodepng_convert does the color conversion. It is available in the 1297 | interface but normally isn't needed since the encoder and decoder already call 1298 | it. 1299 | 1300 | 6.3. padding bits 1301 | ----------------- 1302 | 1303 | In the PNG file format, if a less than 8-bit per pixel color type is used and the scanlines 1304 | have a bit amount that isn't a multiple of 8, then padding bits are used so that each 1305 | scanline starts at a fresh byte. But that is NOT true for the LodePNG raw input and output. 1306 | The raw input image you give to the encoder, and the raw output image you get from the decoder 1307 | will NOT have these padding bits, e.g. in the case of a 1-bit image with a width 1308 | of 7 pixels, the first pixel of the second scanline will the the 8th bit of the first byte, 1309 | not the first bit of a new byte. 1310 | 1311 | 6.4. A note about 16-bits per channel and endianness 1312 | ---------------------------------------------------- 1313 | 1314 | LodePNG uses unsigned char arrays for 16-bit per channel colors too, just like 1315 | for any other color format. The 16-bit values are stored in big endian (most 1316 | significant byte first) in these arrays. This is the opposite order of the 1317 | little endian used by x86 CPU's. 1318 | 1319 | LodePNG always uses big endian because the PNG file format does so internally. 1320 | Conversions to other formats than PNG uses internally are not supported by 1321 | LodePNG on purpose, there are myriads of formats, including endianness of 16-bit 1322 | colors, the order in which you store R, G, B and A, and so on. Supporting and 1323 | converting to/from all that is outside the scope of LodePNG. 1324 | 1325 | This may mean that, depending on your use case, you may want to convert the big 1326 | endian output of LodePNG to little endian with a for loop. This is certainly not 1327 | always needed, many applications and libraries support big endian 16-bit colors 1328 | anyway, but it means you cannot simply cast the unsigned char* buffer to an 1329 | unsigned short* buffer on x86 CPUs. 1330 | 1331 | 1332 | 7. error values 1333 | --------------- 1334 | 1335 | All functions in LodePNG that return an error code, return 0 if everything went 1336 | OK, or a non-zero code if there was an error. 1337 | 1338 | The meaning of the LodePNG error values can be retrieved with the function 1339 | lodepng_error_text: given the numerical error code, it returns a description 1340 | of the error in English as a string. 1341 | 1342 | Check the implementation of lodepng_error_text to see the meaning of each code. 1343 | 1344 | 1345 | 8. chunks and PNG editing 1346 | ------------------------- 1347 | 1348 | If you want to add extra chunks to a PNG you encode, or use LodePNG for a PNG 1349 | editor that should follow the rules about handling of unknown chunks, or if your 1350 | program is able to read other types of chunks than the ones handled by LodePNG, 1351 | then that's possible with the chunk functions of LodePNG. 1352 | 1353 | A PNG chunk has the following layout: 1354 | 1355 | 4 bytes length 1356 | 4 bytes type name 1357 | length bytes data 1358 | 4 bytes CRC 1359 | 1360 | 8.1. iterating through chunks 1361 | ----------------------------- 1362 | 1363 | If you have a buffer containing the PNG image data, then the first chunk (the 1364 | IHDR chunk) starts at byte number 8 of that buffer. The first 8 bytes are the 1365 | signature of the PNG and are not part of a chunk. But if you start at byte 8 1366 | then you have a chunk, and can check the following things of it. 1367 | 1368 | NOTE: none of these functions check for memory buffer boundaries. To avoid 1369 | exploits, always make sure the buffer contains all the data of the chunks. 1370 | When using lodepng_chunk_next, make sure the returned value is within the 1371 | allocated memory. 1372 | 1373 | unsigned lodepng_chunk_length(const unsigned char* chunk): 1374 | 1375 | Get the length of the chunk's data. The total chunk length is this length + 12. 1376 | 1377 | void lodepng_chunk_type(char type[5], const unsigned char* chunk): 1378 | unsigned char lodepng_chunk_type_equals(const unsigned char* chunk, const char* type): 1379 | 1380 | Get the type of the chunk or compare if it's a certain type 1381 | 1382 | unsigned char lodepng_chunk_critical(const unsigned char* chunk): 1383 | unsigned char lodepng_chunk_private(const unsigned char* chunk): 1384 | unsigned char lodepng_chunk_safetocopy(const unsigned char* chunk): 1385 | 1386 | Check if the chunk is critical in the PNG standard (only IHDR, PLTE, IDAT and IEND are). 1387 | Check if the chunk is private (public chunks are part of the standard, private ones not). 1388 | Check if the chunk is safe to copy. If it's not, then, when modifying data in a critical 1389 | chunk, unsafe to copy chunks of the old image may NOT be saved in the new one if your 1390 | program doesn't handle that type of unknown chunk. 1391 | 1392 | unsigned char* lodepng_chunk_data(unsigned char* chunk): 1393 | const unsigned char* lodepng_chunk_data_const(const unsigned char* chunk): 1394 | 1395 | Get a pointer to the start of the data of the chunk. 1396 | 1397 | unsigned lodepng_chunk_check_crc(const unsigned char* chunk): 1398 | void lodepng_chunk_generate_crc(unsigned char* chunk): 1399 | 1400 | Check if the crc is correct or generate a correct one. 1401 | 1402 | unsigned char* lodepng_chunk_next(unsigned char* chunk): 1403 | const unsigned char* lodepng_chunk_next_const(const unsigned char* chunk): 1404 | 1405 | Iterate to the next chunk. This works if you have a buffer with consecutive chunks. Note that these 1406 | functions do no boundary checking of the allocated data whatsoever, so make sure there is enough 1407 | data available in the buffer to be able to go to the next chunk. 1408 | 1409 | unsigned lodepng_chunk_append(unsigned char** out, size_t* outlength, const unsigned char* chunk): 1410 | unsigned lodepng_chunk_create(unsigned char** out, size_t* outlength, unsigned length, 1411 | const char* type, const unsigned char* data): 1412 | 1413 | These functions are used to create new chunks that are appended to the data in *out that has 1414 | length *outlength. The append function appends an existing chunk to the new data. The create 1415 | function creates a new chunk with the given parameters and appends it. Type is the 4-letter 1416 | name of the chunk. 1417 | 1418 | 8.2. chunks in info_png 1419 | ----------------------- 1420 | 1421 | The LodePNGInfo struct contains fields with the unknown chunk in it. It has 3 1422 | buffers (each with size) to contain 3 types of unknown chunks: 1423 | the ones that come before the PLTE chunk, the ones that come between the PLTE 1424 | and the IDAT chunks, and the ones that come after the IDAT chunks. 1425 | It's necessary to make the distionction between these 3 cases because the PNG 1426 | standard forces to keep the ordering of unknown chunks compared to the critical 1427 | chunks, but does not force any other ordering rules. 1428 | 1429 | info_png.unknown_chunks_data[0] is the chunks before PLTE 1430 | info_png.unknown_chunks_data[1] is the chunks after PLTE, before IDAT 1431 | info_png.unknown_chunks_data[2] is the chunks after IDAT 1432 | 1433 | The chunks in these 3 buffers can be iterated through and read by using the same 1434 | way described in the previous subchapter. 1435 | 1436 | When using the decoder to decode a PNG, you can make it store all unknown chunks 1437 | if you set the option settings.remember_unknown_chunks to 1. By default, this 1438 | option is off (0). 1439 | 1440 | The encoder will always encode unknown chunks that are stored in the info_png. 1441 | If you need it to add a particular chunk that isn't known by LodePNG, you can 1442 | use lodepng_chunk_append or lodepng_chunk_create to the chunk data in 1443 | info_png.unknown_chunks_data[x]. 1444 | 1445 | Chunks that are known by LodePNG should not be added in that way. E.g. to make 1446 | LodePNG add a bKGD chunk, set background_defined to true and add the correct 1447 | parameters there instead. 1448 | 1449 | 1450 | 9. compiler support 1451 | ------------------- 1452 | 1453 | No libraries other than the current standard C library are needed to compile 1454 | LodePNG. For the C++ version, only the standard C++ library is needed on top. 1455 | Add the files lodepng.c(pp) and lodepng.h to your project, include 1456 | lodepng.h where needed, and your program can read/write PNG files. 1457 | 1458 | It is compatible with C90 and up, and C++03 and up. 1459 | 1460 | If performance is important, use optimization when compiling! For both the 1461 | encoder and decoder, this makes a large difference. 1462 | 1463 | Make sure that LodePNG is compiled with the same compiler of the same version 1464 | and with the same settings as the rest of the program, or the interfaces with 1465 | std::vectors and std::strings in C++ can be incompatible. 1466 | 1467 | CHAR_BITS must be 8 or higher, because LodePNG uses unsigned chars for octets. 1468 | 1469 | *) gcc and g++ 1470 | 1471 | LodePNG is developed in gcc so this compiler is natively supported. It gives no 1472 | warnings with compiler options "-Wall -Wextra -pedantic -ansi", with gcc and g++ 1473 | version 4.7.1 on Linux, 32-bit and 64-bit. 1474 | 1475 | *) Clang 1476 | 1477 | Fully supported and warning-free. 1478 | 1479 | *) Mingw 1480 | 1481 | The Mingw compiler (a port of gcc for Windows) should be fully supported by 1482 | LodePNG. 1483 | 1484 | *) Visual Studio and Visual C++ Express Edition 1485 | 1486 | LodePNG should be warning-free with warning level W4. Two warnings were disabled 1487 | with pragmas though: warning 4244 about implicit conversions, and warning 4996 1488 | where it wants to use a non-standard function fopen_s instead of the standard C 1489 | fopen. 1490 | 1491 | Visual Studio may want "stdafx.h" files to be included in each source file and 1492 | give an error "unexpected end of file while looking for precompiled header". 1493 | This is not standard C++ and will not be added to the stock LodePNG. You can 1494 | disable it for lodepng.cpp only by right clicking it, Properties, C/C++, 1495 | Precompiled Headers, and set it to Not Using Precompiled Headers there. 1496 | 1497 | NOTE: Modern versions of VS should be fully supported, but old versions, e.g. 1498 | VS6, are not guaranteed to work. 1499 | 1500 | *) Compilers on Macintosh 1501 | 1502 | LodePNG has been reported to work both with gcc and LLVM for Macintosh, both for 1503 | C and C++. 1504 | 1505 | *) Other Compilers 1506 | 1507 | If you encounter problems on any compilers, feel free to let me know and I may 1508 | try to fix it if the compiler is modern and standards complient. 1509 | 1510 | 1511 | 10. examples 1512 | ------------ 1513 | 1514 | This decoder example shows the most basic usage of LodePNG. More complex 1515 | examples can be found on the LodePNG website. 1516 | 1517 | 10.1. decoder C++ example 1518 | ------------------------- 1519 | 1520 | #include "lodepng.h" 1521 | #include 1522 | 1523 | int main(int argc, char *argv[]) 1524 | { 1525 | const char* filename = argc > 1 ? argv[1] : "test.png"; 1526 | 1527 | //load and decode 1528 | std::vector image; 1529 | unsigned width, height; 1530 | unsigned error = lodepng::decode(image, width, height, filename); 1531 | 1532 | //if there's an error, display it 1533 | if(error) std::cout << "decoder error " << error << ": " << lodepng_error_text(error) << std::endl; 1534 | 1535 | //the pixels are now in the vector "image", 4 bytes per pixel, ordered RGBARGBA..., use it as texture, draw it, ... 1536 | } 1537 | 1538 | 10.2. decoder C example 1539 | ----------------------- 1540 | 1541 | #include "lodepng.h" 1542 | 1543 | int main(int argc, char *argv[]) 1544 | { 1545 | unsigned error; 1546 | unsigned char* image; 1547 | size_t width, height; 1548 | const char* filename = argc > 1 ? argv[1] : "test.png"; 1549 | 1550 | error = lodepng_decode32_file(&image, &width, &height, filename); 1551 | 1552 | if(error) printf("decoder error %u: %s\n", error, lodepng_error_text(error)); 1553 | 1554 | / * use image here * / 1555 | 1556 | free(image); 1557 | return 0; 1558 | } 1559 | 1560 | 11. state settings reference 1561 | ---------------------------- 1562 | 1563 | A quick reference of some settings to set on the LodePNGState 1564 | 1565 | For decoding: 1566 | 1567 | state.decoder.zlibsettings.ignore_adler32: ignore ADLER32 checksums 1568 | state.decoder.zlibsettings.custom_...: use custom inflate function 1569 | state.decoder.ignore_crc: ignore CRC checksums 1570 | state.decoder.color_convert: convert internal PNG color to chosen one 1571 | state.decoder.read_text_chunks: whether to read in text metadata chunks 1572 | state.decoder.remember_unknown_chunks: whether to read in unknown chunks 1573 | state.info_raw.colortype: desired color type for decoded image 1574 | state.info_raw.bitdepth: desired bit depth for decoded image 1575 | state.info_raw....: more color settings, see struct LodePNGColorMode 1576 | state.info_png....: no settings for decoder but ouput, see struct LodePNGInfo 1577 | 1578 | For encoding: 1579 | 1580 | state.encoder.zlibsettings.btype: disable compression by setting it to 0 1581 | state.encoder.zlibsettings.use_lz77: use LZ77 in compression 1582 | state.encoder.zlibsettings.windowsize: tweak LZ77 windowsize 1583 | state.encoder.zlibsettings.minmatch: tweak min LZ77 length to match 1584 | state.encoder.zlibsettings.nicematch: tweak LZ77 match where to stop searching 1585 | state.encoder.zlibsettings.lazymatching: try one more LZ77 matching 1586 | state.encoder.zlibsettings.custom_...: use custom deflate function 1587 | state.encoder.auto_convert: choose optimal PNG color type, if 0 uses info_png 1588 | state.encoder.filter_palette_zero: PNG filter strategy for palette 1589 | state.encoder.filter_strategy: PNG filter strategy to encode with 1590 | state.encoder.force_palette: add palette even if not encoding to one 1591 | state.encoder.add_id: add LodePNG identifier and version as a text chunk 1592 | state.encoder.text_compression: use compressed text chunks for metadata 1593 | state.info_raw.colortype: color type of raw input image you provide 1594 | state.info_raw.bitdepth: bit depth of raw input image you provide 1595 | state.info_raw: more color settings, see struct LodePNGColorMode 1596 | state.info_png.color.colortype: desired color type if auto_convert is false 1597 | state.info_png.color.bitdepth: desired bit depth if auto_convert is false 1598 | state.info_png.color....: more color settings, see struct LodePNGColorMode 1599 | state.info_png....: more PNG related settings, see struct LodePNGInfo 1600 | 1601 | 1602 | 12. changes 1603 | ----------- 1604 | 1605 | The version number of LodePNG is the date of the change given in the format 1606 | yyyymmdd. 1607 | 1608 | Some changes aren't backwards compatible. Those are indicated with a (!) 1609 | symbol. 1610 | 1611 | *) 27 nov 2016: grey+alpha auto color model detection bugfix 1612 | *) 18 apr 2016: Changed qsort to custom stable sort (for platforms w/o qsort). 1613 | *) 09 apr 2016: Fixed colorkey usage detection, and better file loading (within 1614 | the limits of pure C90). 1615 | *) 08 dec 2015: Made load_file function return error if file can't be opened. 1616 | *) 24 okt 2015: Bugfix with decoding to palette output. 1617 | *) 18 apr 2015: Boundary PM instead of just package-merge for faster encoding. 1618 | *) 23 aug 2014: Reduced needless memory usage of decoder. 1619 | *) 28 jun 2014: Removed fix_png setting, always support palette OOB for 1620 | simplicity. Made ColorProfile public. 1621 | *) 09 jun 2014: Faster encoder by fixing hash bug and more zeros optimization. 1622 | *) 22 dec 2013: Power of two windowsize required for optimization. 1623 | *) 15 apr 2013: Fixed bug with LAC_ALPHA and color key. 1624 | *) 25 mar 2013: Added an optional feature to ignore some PNG errors (fix_png). 1625 | *) 11 mar 2013 (!): Bugfix with custom free. Changed from "my" to "lodepng_" 1626 | prefix for the custom allocators and made it possible with a new #define to 1627 | use custom ones in your project without needing to change lodepng's code. 1628 | *) 28 jan 2013: Bugfix with color key. 1629 | *) 27 okt 2012: Tweaks in text chunk keyword length error handling. 1630 | *) 8 okt 2012 (!): Added new filter strategy (entropy) and new auto color mode. 1631 | (no palette). Better deflate tree encoding. New compression tweak settings. 1632 | Faster color conversions while decoding. Some internal cleanups. 1633 | *) 23 sep 2012: Reduced warnings in Visual Studio a little bit. 1634 | *) 1 sep 2012 (!): Removed #define's for giving custom (de)compression functions 1635 | and made it work with function pointers instead. 1636 | *) 23 jun 2012: Added more filter strategies. Made it easier to use custom alloc 1637 | and free functions and toggle #defines from compiler flags. Small fixes. 1638 | *) 6 may 2012 (!): Made plugging in custom zlib/deflate functions more flexible. 1639 | *) 22 apr 2012 (!): Made interface more consistent, renaming a lot. Removed 1640 | redundant C++ codec classes. Reduced amount of structs. Everything changed, 1641 | but it is cleaner now imho and functionality remains the same. Also fixed 1642 | several bugs and shrunk the implementation code. Made new samples. 1643 | *) 6 nov 2011 (!): By default, the encoder now automatically chooses the best 1644 | PNG color model and bit depth, based on the amount and type of colors of the 1645 | raw image. For this, autoLeaveOutAlphaChannel replaced by auto_choose_color. 1646 | *) 9 okt 2011: simpler hash chain implementation for the encoder. 1647 | *) 8 sep 2011: lz77 encoder lazy matching instead of greedy matching. 1648 | *) 23 aug 2011: tweaked the zlib compression parameters after benchmarking. 1649 | A bug with the PNG filtertype heuristic was fixed, so that it chooses much 1650 | better ones (it's quite significant). A setting to do an experimental, slow, 1651 | brute force search for PNG filter types is added. 1652 | *) 17 aug 2011 (!): changed some C zlib related function names. 1653 | *) 16 aug 2011: made the code less wide (max 120 characters per line). 1654 | *) 17 apr 2011: code cleanup. Bugfixes. Convert low to 16-bit per sample colors. 1655 | *) 21 feb 2011: fixed compiling for C90. Fixed compiling with sections disabled. 1656 | *) 11 dec 2010: encoding is made faster, based on suggestion by Peter Eastman 1657 | to optimize long sequences of zeros. 1658 | *) 13 nov 2010: added LodePNG_InfoColor_hasPaletteAlpha and 1659 | LodePNG_InfoColor_canHaveAlpha functions for convenience. 1660 | *) 7 nov 2010: added LodePNG_error_text function to get error code description. 1661 | *) 30 okt 2010: made decoding slightly faster 1662 | *) 26 okt 2010: (!) changed some C function and struct names (more consistent). 1663 | Reorganized the documentation and the declaration order in the header. 1664 | *) 08 aug 2010: only changed some comments and external samples. 1665 | *) 05 jul 2010: fixed bug thanks to warnings in the new gcc version. 1666 | *) 14 mar 2010: fixed bug where too much memory was allocated for char buffers. 1667 | *) 02 sep 2008: fixed bug where it could create empty tree that linux apps could 1668 | read by ignoring the problem but windows apps couldn't. 1669 | *) 06 jun 2008: added more error checks for out of memory cases. 1670 | *) 26 apr 2008: added a few more checks here and there to ensure more safety. 1671 | *) 06 mar 2008: crash with encoding of strings fixed 1672 | *) 02 feb 2008: support for international text chunks added (iTXt) 1673 | *) 23 jan 2008: small cleanups, and #defines to divide code in sections 1674 | *) 20 jan 2008: support for unknown chunks allowing using LodePNG for an editor. 1675 | *) 18 jan 2008: support for tIME and pHYs chunks added to encoder and decoder. 1676 | *) 17 jan 2008: ability to encode and decode compressed zTXt chunks added 1677 | Also various fixes, such as in the deflate and the padding bits code. 1678 | *) 13 jan 2008: Added ability to encode Adam7-interlaced images. Improved 1679 | filtering code of encoder. 1680 | *) 07 jan 2008: (!) changed LodePNG to use ISO C90 instead of C++. A 1681 | C++ wrapper around this provides an interface almost identical to before. 1682 | Having LodePNG be pure ISO C90 makes it more portable. The C and C++ code 1683 | are together in these files but it works both for C and C++ compilers. 1684 | *) 29 dec 2007: (!) changed most integer types to unsigned int + other tweaks 1685 | *) 30 aug 2007: bug fixed which makes this Borland C++ compatible 1686 | *) 09 aug 2007: some VS2005 warnings removed again 1687 | *) 21 jul 2007: deflate code placed in new namespace separate from zlib code 1688 | *) 08 jun 2007: fixed bug with 2- and 4-bit color, and small interlaced images 1689 | *) 04 jun 2007: improved support for Visual Studio 2005: crash with accessing 1690 | invalid std::vector element [0] fixed, and level 3 and 4 warnings removed 1691 | *) 02 jun 2007: made the encoder add a tag with version by default 1692 | *) 27 may 2007: zlib and png code separated (but still in the same file), 1693 | simple encoder/decoder functions added for more simple usage cases 1694 | *) 19 may 2007: minor fixes, some code cleaning, new error added (error 69), 1695 | moved some examples from here to lodepng_examples.cpp 1696 | *) 12 may 2007: palette decoding bug fixed 1697 | *) 24 apr 2007: changed the license from BSD to the zlib license 1698 | *) 11 mar 2007: very simple addition: ability to encode bKGD chunks. 1699 | *) 04 mar 2007: (!) tEXt chunk related fixes, and support for encoding 1700 | palettized PNG images. Plus little interface change with palette and texts. 1701 | *) 03 mar 2007: Made it encode dynamic Huffman shorter with repeat codes. 1702 | Fixed a bug where the end code of a block had length 0 in the Huffman tree. 1703 | *) 26 feb 2007: Huffman compression with dynamic trees (BTYPE 2) now implemented 1704 | and supported by the encoder, resulting in smaller PNGs at the output. 1705 | *) 27 jan 2007: Made the Adler-32 test faster so that a timewaste is gone. 1706 | *) 24 jan 2007: gave encoder an error interface. Added color conversion from any 1707 | greyscale type to 8-bit greyscale with or without alpha. 1708 | *) 21 jan 2007: (!) Totally changed the interface. It allows more color types 1709 | to convert to and is more uniform. See the manual for how it works now. 1710 | *) 07 jan 2007: Some cleanup & fixes, and a few changes over the last days: 1711 | encode/decode custom tEXt chunks, separate classes for zlib & deflate, and 1712 | at last made the decoder give errors for incorrect Adler32 or Crc. 1713 | *) 01 jan 2007: Fixed bug with encoding PNGs with less than 8 bits per channel. 1714 | *) 29 dec 2006: Added support for encoding images without alpha channel, and 1715 | cleaned out code as well as making certain parts faster. 1716 | *) 28 dec 2006: Added "Settings" to the encoder. 1717 | *) 26 dec 2006: The encoder now does LZ77 encoding and produces much smaller files now. 1718 | Removed some code duplication in the decoder. Fixed little bug in an example. 1719 | *) 09 dec 2006: (!) Placed output parameters of public functions as first parameter. 1720 | Fixed a bug of the decoder with 16-bit per color. 1721 | *) 15 okt 2006: Changed documentation structure 1722 | *) 09 okt 2006: Encoder class added. It encodes a valid PNG image from the 1723 | given image buffer, however for now it's not compressed. 1724 | *) 08 sep 2006: (!) Changed to interface with a Decoder class 1725 | *) 30 jul 2006: (!) LodePNG_InfoPng , width and height are now retrieved in different 1726 | way. Renamed decodePNG to decodePNGGeneric. 1727 | *) 29 jul 2006: (!) Changed the interface: image info is now returned as a 1728 | struct of type LodePNG::LodePNG_Info, instead of a vector, which was a bit clumsy. 1729 | *) 28 jul 2006: Cleaned the code and added new error checks. 1730 | Corrected terminology "deflate" into "inflate". 1731 | *) 23 jun 2006: Added SDL example in the documentation in the header, this 1732 | example allows easy debugging by displaying the PNG and its transparency. 1733 | *) 22 jun 2006: (!) Changed way to obtain error value. Added 1734 | loadFile function for convenience. Made decodePNG32 faster. 1735 | *) 21 jun 2006: (!) Changed type of info vector to unsigned. 1736 | Changed position of palette in info vector. Fixed an important bug that 1737 | happened on PNGs with an uncompressed block. 1738 | *) 16 jun 2006: Internally changed unsigned into unsigned where 1739 | needed, and performed some optimizations. 1740 | *) 07 jun 2006: (!) Renamed functions to decodePNG and placed them 1741 | in LodePNG namespace. Changed the order of the parameters. Rewrote the 1742 | documentation in the header. Renamed files to lodepng.cpp and lodepng.h 1743 | *) 22 apr 2006: Optimized and improved some code 1744 | *) 07 sep 2005: (!) Changed to std::vector interface 1745 | *) 12 aug 2005: Initial release (C++, decoder only) 1746 | 1747 | 1748 | 13. contact information 1749 | ----------------------- 1750 | 1751 | Feel free to contact me with suggestions, problems, comments, ... concerning 1752 | LodePNG. If you encounter a PNG image that doesn't work properly with this 1753 | decoder, feel free to send it and I'll use it to find and fix the problem. 1754 | 1755 | My email address is (puzzle the account and domain together with an @ symbol): 1756 | Domain: gmail dot com. 1757 | Account: lode dot vandevenne. 1758 | 1759 | 1760 | Copyright (c) 2005-2016 Lode Vandevenne 1761 | */ 1762 | -------------------------------------------------------------------------------- /crunch/main.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | crunch - command line texture packer 26 | ==================================== 27 | 28 | usage: 29 | crunch [OUTPUT] [INPUT1,INPUT2,INPUT3...] [OPTIONS...] 30 | 31 | example: 32 | crunch bin/atlases/atlas assets/characters,assets/tiles -p -t -v -u -r 33 | 34 | options: 35 | -d --default use default settings (-x -p -t -u) 36 | -x --xml saves the atlas data as a .xml file 37 | -b --binary saves the atlas data as a .bin file 38 | -j --json saves the atlas data as a .json file 39 | -p --premultiply premultiplies the pixels of the bitmaps by their alpha channel 40 | -t --trim trims excess transparency off the bitmaps 41 | -v --verbose print to the debug console as the packer works 42 | -f --force ignore the hash, forcing the packer to repack 43 | -u --unique remove duplicate bitmaps from the atlas 44 | -r --rotate enabled rotating bitmaps 90 degrees clockwise when packing 45 | -s# --size# max atlas size (# can be 4096, 2048, 1024, 512, 256, 128, or 64) 46 | -p# --pad# padding between images (# can be from 0 to 16) 47 | 48 | binary format: 49 | [int16] num_textures (below block is repeated this many times) 50 | [string] name 51 | [int16] num_images (below block is repeated this many times) 52 | [string] img_name 53 | [int16] img_x 54 | [int16] img_y 55 | [int16] img_width 56 | [int16] img_height 57 | [int16] img_frame_x (if --trim enabled) 58 | [int16] img_frame_y (if --trim enabled) 59 | [int16] img_frame_width (if --trim enabled) 60 | [int16] img_frame_height (if --trim enabled) 61 | [byte] img_rotated (if --rotate enabled) 62 | */ 63 | 64 | #include 65 | #include 66 | #include 67 | #include 68 | #include 69 | #include 70 | #include 71 | #include "tinydir.h" 72 | #include "bitmap.hpp" 73 | #include "packer.hpp" 74 | #include "binary.hpp" 75 | #include "hash.hpp" 76 | #include "str.hpp" 77 | 78 | using namespace std; 79 | 80 | static int optSize; 81 | static int optPadding; 82 | static bool optXml; 83 | static bool optBinary; 84 | static bool optJson; 85 | static bool optPremultiply; 86 | static bool optTrim; 87 | static bool optVerbose; 88 | static bool optForce; 89 | static bool optUnique; 90 | static bool optRotate; 91 | static vector bitmaps; 92 | static vector packers; 93 | 94 | static void SplitFileName(const string& path, string* dir, string* name, string* ext) 95 | { 96 | size_t si = path.rfind('/') + 1; 97 | if (si == string::npos) 98 | si = 0; 99 | size_t di = path.rfind('.'); 100 | if (dir != nullptr) 101 | { 102 | if (si > 0) 103 | *dir = path.substr(0, si); 104 | else 105 | *dir = ""; 106 | } 107 | if (name != nullptr) 108 | { 109 | if (di != string::npos) 110 | *name = path.substr(si, di - si); 111 | else 112 | *name = path.substr(si); 113 | } 114 | if (ext != nullptr) 115 | { 116 | if (di != string::npos) 117 | *ext = path.substr(di); 118 | else 119 | *ext = ""; 120 | } 121 | } 122 | 123 | static string GetFileName(const string& path) 124 | { 125 | string name; 126 | SplitFileName(path, nullptr, &name, nullptr); 127 | return name; 128 | } 129 | 130 | static void LoadBitmap(const string& prefix, const string& path) 131 | { 132 | if (optVerbose) 133 | cout << '\t' << PathToStr(path) << endl; 134 | 135 | bitmaps.push_back(new Bitmap(PathToStr(path), prefix + GetFileName(PathToStr(path)), optPremultiply, optTrim)); 136 | } 137 | 138 | static void LoadBitmaps(const string& root, const string& prefix) 139 | { 140 | static string dot1 = "."; 141 | static string dot2 = ".."; 142 | 143 | tinydir_dir dir; 144 | tinydir_open(&dir, StrToPath(root).data()); 145 | 146 | while (dir.has_next) 147 | { 148 | tinydir_file file; 149 | tinydir_readfile(&dir, &file); 150 | 151 | if (file.is_dir) 152 | { 153 | if (dot1 != PathToStr(file.name) && dot2 != PathToStr(file.name)) 154 | LoadBitmaps(PathToStr(file.path), prefix + PathToStr(file.name) + "/"); 155 | } 156 | else if (PathToStr(file.extension) == "png") 157 | LoadBitmap(prefix, file.path); 158 | 159 | tinydir_next(&dir); 160 | } 161 | 162 | tinydir_close(&dir); 163 | } 164 | 165 | static void RemoveFile(string file) 166 | { 167 | remove(file.data()); 168 | } 169 | 170 | static int GetPackSize(const string& str) 171 | { 172 | if (str == "4096") 173 | return 4096; 174 | if (str == "2048") 175 | return 2048; 176 | if (str == "1024") 177 | return 1024; 178 | if (str == "512") 179 | return 512; 180 | if (str == "256") 181 | return 256; 182 | if (str == "128") 183 | return 128; 184 | if (str == "64") 185 | return 64; 186 | cerr << "invalid size: " << str << endl; 187 | exit(EXIT_FAILURE); 188 | return 0; 189 | } 190 | 191 | static int GetPadding(const string& str) 192 | { 193 | for (int i = 0; i <= 16; ++i) 194 | if (str == to_string(i)) 195 | return i; 196 | cerr << "invalid padding value: " << str << endl; 197 | exit(EXIT_FAILURE); 198 | return 1; 199 | } 200 | 201 | int main(int argc, const char* argv[]) 202 | { 203 | //Print out passed arguments 204 | for (int i = 0; i < argc; ++i) 205 | cout << argv[i] << ' '; 206 | cout << endl; 207 | 208 | if (argc < 3) 209 | { 210 | cerr << "invalid input, expected: \"crunch [INPUT DIRECTORY] [OUTPUT PREFIX] [OPTIONS...]\"" << endl; 211 | return EXIT_FAILURE; 212 | } 213 | 214 | //Get the output directory and name 215 | string outputDir, name; 216 | SplitFileName(argv[1], &outputDir, &name, nullptr); 217 | 218 | //Get all the input files and directories 219 | vector inputs; 220 | stringstream ss(argv[2]); 221 | while (ss.good()) 222 | { 223 | string inputStr; 224 | getline(ss, inputStr, ','); 225 | inputs.push_back(inputStr); 226 | } 227 | 228 | //Get the options 229 | optSize = 4096; 230 | optPadding = 1; 231 | optXml = false; 232 | optBinary = false; 233 | optJson = false; 234 | optPremultiply = false; 235 | optTrim = false; 236 | optVerbose = false; 237 | optForce = false; 238 | optUnique = false; 239 | for (int i = 3; i < argc; ++i) 240 | { 241 | string arg = argv[i]; 242 | if (arg == "-d" || arg == "--default") 243 | optXml = optPremultiply = optTrim = optUnique = true; 244 | else if (arg == "-x" || arg == "--xml") 245 | optXml = true; 246 | else if (arg == "-b" || arg == "--binary") 247 | optBinary = true; 248 | else if (arg == "-j" || arg == "--json") 249 | optJson = true; 250 | else if (arg == "-p" || arg == "--premultiply") 251 | optPremultiply = true; 252 | else if (arg == "-t" || arg == "--trim") 253 | optTrim = true; 254 | else if (arg == "-v" || arg == "--verbose") 255 | optVerbose = true; 256 | else if (arg == "-f" || arg == "--force") 257 | optForce = true; 258 | else if (arg == "-u" || arg == "--unique") 259 | optUnique = true; 260 | else if (arg == "-r" || arg == "--rotate") 261 | optRotate = true; 262 | else if (arg.find("--size") == 0) 263 | optSize = GetPackSize(arg.substr(6)); 264 | else if (arg.find("-s") == 0) 265 | optSize = GetPackSize(arg.substr(2)); 266 | else if (arg.find("--pad") == 0) 267 | optPadding = GetPadding(arg.substr(5)); 268 | else if (arg.find("-p") == 0) 269 | optPadding = GetPadding(arg.substr(2)); 270 | else 271 | { 272 | cerr << "unexpected argument: " << arg << endl; 273 | return EXIT_FAILURE; 274 | } 275 | } 276 | 277 | //Hash the arguments and input directories 278 | size_t newHash = 0; 279 | for (int i = 1; i < argc; ++i) 280 | HashString(newHash, argv[i]); 281 | for (size_t i = 0; i < inputs.size(); ++i) 282 | { 283 | if (inputs[i].rfind('.') == string::npos) 284 | HashFiles(newHash, inputs[i]); 285 | else 286 | HashFile(newHash, inputs[i]); 287 | } 288 | 289 | //Load the old hash 290 | size_t oldHash; 291 | if (LoadHash(oldHash, outputDir + name + ".hash")) 292 | { 293 | if (!optForce && newHash == oldHash) 294 | { 295 | cout << "atlas is unchanged: " << name << endl; 296 | return EXIT_SUCCESS; 297 | } 298 | } 299 | 300 | /*-d --default use default settings (-x -p -t -u) 301 | -x --xml saves the atlas data as a .xml file 302 | -b --binary saves the atlas data as a .bin file 303 | -j --json saves the atlas data as a .json file 304 | -p --premultiply premultiplies the pixels of the bitmaps by their alpha channel 305 | -t --trim trims excess transparency off the bitmaps 306 | -v --verbose print to the debug console as the packer works 307 | -f --force ignore the hash, forcing the packer to repack 308 | -u --unique remove duplicate bitmaps from the atlas 309 | -r --rotate enabled rotating bitmaps 90 degrees clockwise when packing 310 | -s# --size# max atlas size (# can be 4096, 2048, 1024, 512, or 256) 311 | -p# --pad# padding between images (# can be from 0 to 16)*/ 312 | 313 | if (optVerbose) 314 | { 315 | cout << "options..." << endl; 316 | cout << "\t--xml: " << (optXml ? "true" : "false") << endl; 317 | cout << "\t--binary: " << (optBinary ? "true" : "false") << endl; 318 | cout << "\t--json: " << (optJson ? "true" : "false") << endl; 319 | cout << "\t--premultiply: " << (optPremultiply ? "true" : "false") << endl; 320 | cout << "\t--trim: " << (optTrim ? "true" : "false") << endl; 321 | cout << "\t--verbose: " << (optVerbose ? "true" : "false") << endl; 322 | cout << "\t--force: " << (optForce ? "true" : "false") << endl; 323 | cout << "\t--unique: " << (optUnique ? "true" : "false") << endl; 324 | cout << "\t--rotate: " << (optRotate ? "true" : "false") << endl; 325 | cout << "\t--size: " << optSize << endl; 326 | cout << "\t--pad: " << optPadding << endl; 327 | } 328 | 329 | //Remove old files 330 | RemoveFile(outputDir + name + ".hash"); 331 | RemoveFile(outputDir + name + ".bin"); 332 | RemoveFile(outputDir + name + ".xml"); 333 | RemoveFile(outputDir + name + ".json"); 334 | for (size_t i = 0; i < 16; ++i) 335 | RemoveFile(outputDir + name + to_string(i) + ".png"); 336 | 337 | //Load the bitmaps from all the input files and directories 338 | if (optVerbose) 339 | cout << "loading images..." << endl; 340 | for (size_t i = 0; i < inputs.size(); ++i) 341 | { 342 | if (inputs[i].rfind('.') != string::npos) 343 | LoadBitmap("", inputs[i]); 344 | else 345 | LoadBitmaps(inputs[i], ""); 346 | } 347 | 348 | //Sort the bitmaps by area 349 | sort(bitmaps.begin(), bitmaps.end(), [](const Bitmap* a, const Bitmap* b) { 350 | return (a->width * a->height) < (b->width * b->height); 351 | }); 352 | 353 | //Pack the bitmaps 354 | while (!bitmaps.empty()) 355 | { 356 | if (optVerbose) 357 | cout << "packing " << bitmaps.size() << " images..." << endl; 358 | auto packer = new Packer(optSize, optSize, optPadding); 359 | packer->Pack(bitmaps, optVerbose, optUnique, optRotate); 360 | packers.push_back(packer); 361 | if (optVerbose) 362 | cout << "finished packing: " << name << to_string(packers.size() - 1) << " (" << packer->width << " x " << packer->height << ')' << endl; 363 | 364 | if (packer->bitmaps.empty()) 365 | { 366 | cerr << "packing failed, could not fit bitmap: " << (bitmaps.back())->name << endl; 367 | return EXIT_FAILURE; 368 | } 369 | } 370 | 371 | //Save the atlas image 372 | for (size_t i = 0; i < packers.size(); ++i) 373 | { 374 | if (optVerbose) 375 | cout << "writing png: " << outputDir << name << to_string(i) << ".png" << endl; 376 | packers[i]->SavePng(outputDir + name + to_string(i) + ".png"); 377 | } 378 | 379 | //Save the atlas binary 380 | if (optBinary) 381 | { 382 | if (optVerbose) 383 | cout << "writing bin: " << outputDir << name << ".bin" << endl; 384 | 385 | ofstream bin(outputDir + name + ".bin", ios::binary); 386 | WriteShort(bin, (int16_t)packers.size()); 387 | for (size_t i = 0; i < packers.size(); ++i) 388 | packers[i]->SaveBin(name + to_string(i), bin, optTrim, optRotate); 389 | bin.close(); 390 | } 391 | 392 | //Save the atlas xml 393 | if (optXml) 394 | { 395 | if (optVerbose) 396 | cout << "writing xml: " << outputDir << name << ".xml" << endl; 397 | 398 | ofstream xml(outputDir + name + ".xml"); 399 | xml << "" << endl; 400 | for (size_t i = 0; i < packers.size(); ++i) 401 | packers[i]->SaveXml(name + to_string(i), xml, optTrim, optRotate); 402 | xml << ""; 403 | } 404 | 405 | //Save the atlas json 406 | if (optJson) 407 | { 408 | if (optVerbose) 409 | cout << "writing json: " << outputDir << name << ".json" << endl; 410 | 411 | ofstream json(outputDir + name + ".json"); 412 | json << '{' << endl; 413 | json << "\t\"textures\":[" << endl; 414 | for (size_t i = 0; i < packers.size(); ++i) 415 | { 416 | json << "\t\t{" << endl; 417 | packers[i]->SaveJson(name + to_string(i), json, optTrim, optRotate); 418 | json << "\t\t}"; 419 | if (i + 1 < packers.size()) 420 | json << ','; 421 | json << endl; 422 | } 423 | json << "\t]" << endl; 424 | json << '}'; 425 | } 426 | 427 | //Save the new hash 428 | SaveHash(newHash, outputDir + name + ".hash"); 429 | 430 | return EXIT_SUCCESS; 431 | } 432 | -------------------------------------------------------------------------------- /crunch/packer.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #include "packer.hpp" 28 | #include "MaxRectsBinPack.h" 29 | #include "GuillotineBinPack.h" 30 | #include "binary.hpp" 31 | #include 32 | #include 33 | 34 | using namespace std; 35 | using namespace rbp; 36 | 37 | Packer::Packer(int width, int height, int pad) 38 | : width(width), height(height), pad(pad) 39 | { 40 | 41 | } 42 | 43 | void Packer::Pack(vector& bitmaps, bool verbose, bool unique, bool rotate) 44 | { 45 | MaxRectsBinPack packer(width, height); 46 | 47 | int ww = 0; 48 | int hh = 0; 49 | while (!bitmaps.empty()) 50 | { 51 | auto bitmap = bitmaps.back(); 52 | 53 | if (verbose) 54 | cout << '\t' << bitmaps.size() << ": " << bitmap->name << endl; 55 | 56 | //Check to see if this is a duplicate of an already packed bitmap 57 | if (unique) 58 | { 59 | auto di = dupLookup.find(bitmap->hashValue); 60 | if (di != dupLookup.end() && bitmap->Equals(this->bitmaps[di->second])) 61 | { 62 | Point p = points[di->second]; 63 | p.dupID = di->second; 64 | points.push_back(p); 65 | this->bitmaps.push_back(bitmap); 66 | bitmaps.pop_back(); 67 | continue; 68 | } 69 | } 70 | 71 | //If it's not a duplicate, pack it into the atlas 72 | { 73 | Rect rect = packer.Insert(bitmap->width + pad, bitmap->height + pad, rotate, MaxRectsBinPack::RectBestShortSideFit); 74 | 75 | if (rect.width == 0 || rect.height == 0) 76 | break; 77 | 78 | if (unique) 79 | dupLookup[bitmap->hashValue] = static_cast(points.size()); 80 | 81 | //Check if we rotated it 82 | Point p; 83 | p.x = rect.x; 84 | p.y = rect.y; 85 | p.dupID = -1; 86 | p.rot = rotate && bitmap->width != (rect.width - pad); 87 | 88 | points.push_back(p); 89 | this->bitmaps.push_back(bitmap); 90 | bitmaps.pop_back(); 91 | 92 | ww = max(rect.x + rect.width, ww); 93 | hh = max(rect.y + rect.height, hh); 94 | } 95 | } 96 | 97 | while (width / 2 >= ww) 98 | width /= 2; 99 | while( height / 2 >= hh) 100 | height /= 2; 101 | } 102 | 103 | void Packer::SavePng(const string& file) 104 | { 105 | Bitmap bitmap(width, height); 106 | for (size_t i = 0, j = bitmaps.size(); i < j; ++i) 107 | { 108 | if (points[i].dupID < 0) 109 | { 110 | if (points[i].rot) 111 | bitmap.CopyPixelsRot(bitmaps[i], points[i].x, points[i].y); 112 | else 113 | bitmap.CopyPixels(bitmaps[i], points[i].x, points[i].y); 114 | } 115 | } 116 | bitmap.SaveAs(file); 117 | } 118 | 119 | void Packer::SaveXml(const string& name, ofstream& xml, bool trim, bool rotate) 120 | { 121 | xml << "\t" << endl; 122 | for (size_t i = 0, j = bitmaps.size(); i < j; ++i) 123 | { 124 | xml << "\t\tname << "\" "; 125 | xml << "x=\"" << points[i].x << "\" "; 126 | xml << "y=\"" << points[i].y << "\" "; 127 | xml << "w=\"" << bitmaps[i]->width << "\" "; 128 | xml << "h=\"" << bitmaps[i]->height << "\" "; 129 | if (trim) 130 | { 131 | xml << "fx=\"" << bitmaps[i]->frameX << "\" "; 132 | xml << "fy=\"" << bitmaps[i]->frameY << "\" "; 133 | xml << "fw=\"" << bitmaps[i]->frameW << "\" "; 134 | xml << "fh=\"" << bitmaps[i]->frameH << "\" "; 135 | } 136 | if (rotate) 137 | xml << "r=\"" << (points[i].rot ? 1 : 0) << "\" "; 138 | xml << "/>" << endl; 139 | } 140 | xml << "\t" << endl; 141 | } 142 | 143 | void Packer::SaveBin(const string& name, ofstream& bin, bool trim, bool rotate) 144 | { 145 | WriteString(bin, name); 146 | WriteShort(bin, (int16_t)bitmaps.size()); 147 | for (size_t i = 0, j = bitmaps.size(); i < j; ++i) 148 | { 149 | WriteString(bin, bitmaps[i]->name); 150 | WriteShort(bin, (int16_t)points[i].x); 151 | WriteShort(bin, (int16_t)points[i].y); 152 | WriteShort(bin, (int16_t)bitmaps[i]->width); 153 | WriteShort(bin, (int16_t)bitmaps[i]->height); 154 | if (trim) 155 | { 156 | WriteShort(bin, (int16_t)bitmaps[i]->frameX); 157 | WriteShort(bin, (int16_t)bitmaps[i]->frameY); 158 | WriteShort(bin, (int16_t)bitmaps[i]->frameW); 159 | WriteShort(bin, (int16_t)bitmaps[i]->frameH); 160 | } 161 | if (rotate) 162 | WriteByte(bin, points[i].rot ? 1 : 0); 163 | } 164 | } 165 | 166 | void Packer::SaveJson(const string& name, ofstream& json, bool trim, bool rotate) 167 | { 168 | json << "\t\t\t\"name\":\"" << name << "\"," << endl; 169 | json << "\t\t\t\"images\":[" << endl; 170 | for (size_t i = 0, j = bitmaps.size(); i < j; ++i) 171 | { 172 | json << "\t\t\t\t{ "; 173 | json << "\"n\":\"" << bitmaps[i]->name << "\", "; 174 | json << "\"x\":" << points[i].x << ", "; 175 | json << "\"y\":" << points[i].y << ", "; 176 | json << "\"w\":" << bitmaps[i]->width << ", "; 177 | json << "\"h\":" << bitmaps[i]->height; 178 | if (trim) 179 | { 180 | json << ", \"fx\":" << bitmaps[i]->frameX << ", "; 181 | json << "\"fy\":" << bitmaps[i]->frameY << ", "; 182 | json << "\"fw\":" << bitmaps[i]->frameW << ", "; 183 | json << "\"fh\":" << bitmaps[i]->frameH; 184 | } 185 | if (rotate) 186 | json << ", \"r\":" << (points[i].rot ? "true" : "false"); 187 | json << " }"; 188 | if(i != bitmaps.size() -1) 189 | json << ","; 190 | json << endl; 191 | } 192 | json << "\t\t\t]" << endl; 193 | } 194 | -------------------------------------------------------------------------------- /crunch/packer.hpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #ifndef packer_hpp 28 | #define packer_hpp 29 | 30 | #include 31 | #include 32 | #include 33 | #include "bitmap.hpp" 34 | 35 | using namespace std; 36 | 37 | struct Point 38 | { 39 | int x; 40 | int y; 41 | int dupID; 42 | bool rot; 43 | }; 44 | 45 | struct Packer 46 | { 47 | int width; 48 | int height; 49 | int pad; 50 | 51 | vector bitmaps; 52 | vector points; 53 | unordered_map dupLookup; 54 | 55 | Packer(int width, int height, int pad); 56 | void Pack(vector& bitmaps, bool verbose, bool unique, bool rotate); 57 | void SavePng(const string& file); 58 | void SaveXml(const string& name, ofstream& xml, bool trim, bool rotate); 59 | void SaveBin(const string& name, ofstream& bin, bool trim, bool rotate); 60 | void SaveJson(const string& name, ofstream& json, bool trim, bool rotate); 61 | }; 62 | 63 | #endif 64 | -------------------------------------------------------------------------------- /crunch/str.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #include "str.hpp" 28 | 29 | #if defined _MSC_VER || defined __MINGW32__ 30 | #include 31 | #include 32 | wstring StrToPath(const string& str) 33 | { 34 | std::wstring_convert> converter; 35 | return converter.from_bytes(str); 36 | } 37 | string PathToStr(const wstring& str) 38 | { 39 | std::wstring_convert> converter; 40 | return converter.to_bytes(str); 41 | } 42 | #else 43 | const string& StrToPath(const string& str) 44 | { 45 | return str; 46 | } 47 | const string& PathToStr(const string& str) 48 | { 49 | return str; 50 | } 51 | #endif 52 | -------------------------------------------------------------------------------- /crunch/str.hpp: -------------------------------------------------------------------------------- 1 | /* 2 | 3 | MIT License 4 | 5 | Copyright (c) 2017 Chevy Ray Johnston 6 | 7 | Permission is hereby granted, free of charge, to any person obtaining a copy 8 | of this software and associated documentation files (the "Software"), to deal 9 | in the Software without restriction, including without limitation the rights 10 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 | copies of the Software, and to permit persons to whom the Software is 12 | furnished to do so, subject to the following conditions: 13 | 14 | The above copyright notice and this permission notice shall be included in all 15 | copies or substantial portions of the Software. 16 | 17 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 | SOFTWARE. 24 | 25 | */ 26 | 27 | #ifndef str_hpp 28 | #define str_hpp 29 | 30 | #include 31 | using namespace std; 32 | 33 | #if defined _MSC_VER || defined __MINGW32__ 34 | #include 35 | #include 36 | wstring StrToPath(const string& str); 37 | string PathToStr(const wstring& str); 38 | #else 39 | const string& StrToPath(const string& str); 40 | const string& PathToStr(const string& str); 41 | #endif 42 | 43 | #endif 44 | -------------------------------------------------------------------------------- /crunch/tinydir.h: -------------------------------------------------------------------------------- 1 | /* 2 | Copyright (c) 2013-2016, tinydir authors: 3 | - Cong Xu 4 | - Lautis Sun 5 | - Baudouin Feildel 6 | - Andargor 7 | All rights reserved. 8 | 9 | Redistribution and use in source and binary forms, with or without 10 | modification, are permitted provided that the following conditions are met: 11 | 12 | 1. Redistributions of source code must retain the above copyright notice, this 13 | list of conditions and the following disclaimer. 14 | 2. Redistributions in binary form must reproduce the above copyright notice, 15 | this list of conditions and the following disclaimer in the documentation 16 | and/or other materials provided with the distribution. 17 | 18 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 19 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 22 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 25 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 27 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 | */ 29 | #ifndef TINYDIR_H 30 | #define TINYDIR_H 31 | 32 | #ifdef __cplusplus 33 | extern "C" { 34 | #endif 35 | 36 | #if ((defined _UNICODE) && !(defined UNICODE)) 37 | #define UNICODE 38 | #endif 39 | 40 | #if ((defined UNICODE) && !(defined _UNICODE)) 41 | #define _UNICODE 42 | #endif 43 | 44 | #include 45 | #include 46 | #include 47 | #ifdef _MSC_VER 48 | # define WIN32_LEAN_AND_MEAN 49 | # include 50 | # include 51 | # pragma warning(push) 52 | # pragma warning (disable : 4996) 53 | #else 54 | # include 55 | # include 56 | # include 57 | # include 58 | #endif 59 | #ifdef __MINGW32__ 60 | # include 61 | #endif 62 | 63 | 64 | /* types */ 65 | 66 | /* Windows UNICODE wide character support */ 67 | #if defined _MSC_VER || defined __MINGW32__ 68 | #define _tinydir_char_t TCHAR 69 | #define TINYDIR_STRING(s) _TEXT(s) 70 | #define _tinydir_strlen _tcslen 71 | #define _tinydir_strcpy _tcscpy 72 | #define _tinydir_strcat _tcscat 73 | #define _tinydir_strcmp _tcscmp 74 | #define _tinydir_strrchr _tcsrchr 75 | #define _tinydir_strncmp _tcsncmp 76 | #else 77 | #define _tinydir_char_t char 78 | #define TINYDIR_STRING(s) s 79 | #define _tinydir_strlen strlen 80 | #define _tinydir_strcpy strcpy 81 | #define _tinydir_strcat strcat 82 | #define _tinydir_strcmp strcmp 83 | #define _tinydir_strrchr strrchr 84 | #define _tinydir_strncmp strncmp 85 | #endif 86 | 87 | #if (defined _MSC_VER || defined __MINGW32__) 88 | #include 89 | #define _TINYDIR_PATH_MAX MAX_PATH 90 | #elif defined __linux__ 91 | #include 92 | #define _TINYDIR_PATH_MAX PATH_MAX 93 | #else 94 | #define _TINYDIR_PATH_MAX 4096 95 | #endif 96 | 97 | #ifdef _MSC_VER 98 | /* extra chars for the "\\*" mask */ 99 | # define _TINYDIR_PATH_EXTRA 2 100 | #else 101 | # define _TINYDIR_PATH_EXTRA 0 102 | #endif 103 | 104 | #define _TINYDIR_FILENAME_MAX 256 105 | 106 | #if (defined _MSC_VER || defined __MINGW32__) 107 | #define _TINYDIR_DRIVE_MAX 3 108 | #endif 109 | 110 | #ifdef _MSC_VER 111 | # define _TINYDIR_FUNC static __inline 112 | #elif !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L 113 | # define _TINYDIR_FUNC static __inline__ 114 | #else 115 | # define _TINYDIR_FUNC static inline 116 | #endif 117 | 118 | /* readdir_r usage; define TINYDIR_USE_READDIR_R to use it (if supported) */ 119 | #ifdef TINYDIR_USE_READDIR_R 120 | 121 | /* readdir_r is a POSIX-only function, and may not be available under various 122 | * environments/settings, e.g. MinGW. Use readdir fallback */ 123 | #if _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _BSD_SOURCE || _SVID_SOURCE ||\ 124 | _POSIX_SOURCE 125 | # define _TINYDIR_HAS_READDIR_R 126 | #endif 127 | #if _POSIX_C_SOURCE >= 200112L 128 | # define _TINYDIR_HAS_FPATHCONF 129 | # include 130 | #endif 131 | #if _BSD_SOURCE || _SVID_SOURCE || \ 132 | (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700) 133 | # define _TINYDIR_HAS_DIRFD 134 | # include 135 | #endif 136 | #if defined _TINYDIR_HAS_FPATHCONF && defined _TINYDIR_HAS_DIRFD &&\ 137 | defined _PC_NAME_MAX 138 | # define _TINYDIR_USE_FPATHCONF 139 | #endif 140 | #if defined __MINGW32__ || !defined _TINYDIR_HAS_READDIR_R ||\ 141 | !(defined _TINYDIR_USE_FPATHCONF || defined NAME_MAX) 142 | # define _TINYDIR_USE_READDIR 143 | #endif 144 | 145 | /* Use readdir by default */ 146 | #else 147 | # define _TINYDIR_USE_READDIR 148 | #endif 149 | 150 | /* MINGW32 has two versions of dirent, ASCII and UNICODE*/ 151 | #ifndef _MSC_VER 152 | #if (defined __MINGW32__) && (defined _UNICODE) 153 | #define _TINYDIR_DIR _WDIR 154 | #define _tinydir_dirent _wdirent 155 | #define _tinydir_opendir _wopendir 156 | #define _tinydir_readdir _wreaddir 157 | #define _tinydir_closedir _wclosedir 158 | #else 159 | #define _TINYDIR_DIR DIR 160 | #define _tinydir_dirent dirent 161 | #define _tinydir_opendir opendir 162 | #define _tinydir_readdir readdir 163 | #define _tinydir_closedir closedir 164 | #endif 165 | #endif 166 | 167 | /* Allow user to use a custom allocator by defining _TINYDIR_MALLOC and _TINYDIR_FREE. */ 168 | #if defined(_TINYDIR_MALLOC) && defined(_TINYDIR_FREE) 169 | #elif !defined(_TINYDIR_MALLOC) && !defined(_TINYDIR_FREE) 170 | #else 171 | #error "Either define both alloc and free or none of them!" 172 | #endif 173 | 174 | #if !defined(_TINYDIR_MALLOC) 175 | #define _TINYDIR_MALLOC(_size) malloc(_size) 176 | #define _TINYDIR_FREE(_ptr) free(_ptr) 177 | #endif /* !defined(_TINYDIR_MALLOC) */ 178 | 179 | typedef struct tinydir_file 180 | { 181 | _tinydir_char_t path[_TINYDIR_PATH_MAX]; 182 | _tinydir_char_t name[_TINYDIR_FILENAME_MAX]; 183 | _tinydir_char_t *extension; 184 | int is_dir; 185 | int is_reg; 186 | 187 | #ifndef _MSC_VER 188 | #ifdef __MINGW32__ 189 | struct _stat _s; 190 | #else 191 | struct stat _s; 192 | #endif 193 | #endif 194 | } tinydir_file; 195 | 196 | typedef struct tinydir_dir 197 | { 198 | _tinydir_char_t path[_TINYDIR_PATH_MAX]; 199 | int has_next; 200 | size_t n_files; 201 | 202 | tinydir_file *_files; 203 | #ifdef _MSC_VER 204 | HANDLE _h; 205 | WIN32_FIND_DATA _f; 206 | #else 207 | _TINYDIR_DIR *_d; 208 | struct _tinydir_dirent *_e; 209 | #ifndef _TINYDIR_USE_READDIR 210 | struct _tinydir_dirent *_ep; 211 | #endif 212 | #endif 213 | } tinydir_dir; 214 | 215 | 216 | /* declarations */ 217 | 218 | _TINYDIR_FUNC 219 | int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path); 220 | _TINYDIR_FUNC 221 | int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path); 222 | _TINYDIR_FUNC 223 | void tinydir_close(tinydir_dir *dir); 224 | 225 | _TINYDIR_FUNC 226 | int tinydir_next(tinydir_dir *dir); 227 | _TINYDIR_FUNC 228 | int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file); 229 | _TINYDIR_FUNC 230 | int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i); 231 | _TINYDIR_FUNC 232 | int tinydir_open_subdir_n(tinydir_dir *dir, size_t i); 233 | 234 | _TINYDIR_FUNC 235 | int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path); 236 | _TINYDIR_FUNC 237 | void _tinydir_get_ext(tinydir_file *file); 238 | _TINYDIR_FUNC 239 | int _tinydir_file_cmp(const void *a, const void *b); 240 | #ifndef _MSC_VER 241 | #ifndef _TINYDIR_USE_READDIR 242 | _TINYDIR_FUNC 243 | size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp); 244 | #endif 245 | #endif 246 | 247 | 248 | /* definitions*/ 249 | 250 | _TINYDIR_FUNC 251 | int tinydir_open(tinydir_dir *dir, const _tinydir_char_t *path) 252 | { 253 | #ifndef _MSC_VER 254 | #ifndef _TINYDIR_USE_READDIR 255 | int error; 256 | int size; /* using int size */ 257 | #endif 258 | #else 259 | _tinydir_char_t path_buf[_TINYDIR_PATH_MAX]; 260 | #endif 261 | _tinydir_char_t *pathp; 262 | 263 | if (dir == NULL || path == NULL || _tinydir_strlen(path) == 0) 264 | { 265 | errno = EINVAL; 266 | return -1; 267 | } 268 | if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) 269 | { 270 | errno = ENAMETOOLONG; 271 | return -1; 272 | } 273 | 274 | /* initialise dir */ 275 | dir->_files = NULL; 276 | #ifdef _MSC_VER 277 | dir->_h = INVALID_HANDLE_VALUE; 278 | #else 279 | dir->_d = NULL; 280 | #ifndef _TINYDIR_USE_READDIR 281 | dir->_ep = NULL; 282 | #endif 283 | #endif 284 | tinydir_close(dir); 285 | 286 | _tinydir_strcpy(dir->path, path); 287 | /* Remove trailing slashes */ 288 | pathp = &dir->path[_tinydir_strlen(dir->path) - 1]; 289 | while (pathp != dir->path && (*pathp == TINYDIR_STRING('\\') || *pathp == TINYDIR_STRING('/'))) 290 | { 291 | *pathp = TINYDIR_STRING('\0'); 292 | pathp++; 293 | } 294 | #ifdef _MSC_VER 295 | _tinydir_strcpy(path_buf, dir->path); 296 | _tinydir_strcat(path_buf, TINYDIR_STRING("\\*")); 297 | dir->_h = FindFirstFile(path_buf, &dir->_f); 298 | if (dir->_h == INVALID_HANDLE_VALUE) 299 | { 300 | errno = ENOENT; 301 | #else 302 | dir->_d = _tinydir_opendir(path); 303 | if (dir->_d == NULL) 304 | { 305 | #endif 306 | goto bail; 307 | } 308 | 309 | /* read first file */ 310 | dir->has_next = 1; 311 | #ifndef _MSC_VER 312 | #ifdef _TINYDIR_USE_READDIR 313 | dir->_e = _tinydir_readdir(dir->_d); 314 | #else 315 | /* allocate dirent buffer for readdir_r */ 316 | size = _tinydir_dirent_buf_size(dir->_d); /* conversion to int */ 317 | if (size == -1) return -1; 318 | dir->_ep = (struct _tinydir_dirent*)_TINYDIR_MALLOC(size); 319 | if (dir->_ep == NULL) return -1; 320 | 321 | error = readdir_r(dir->_d, dir->_ep, &dir->_e); 322 | if (error != 0) return -1; 323 | #endif 324 | if (dir->_e == NULL) 325 | { 326 | dir->has_next = 0; 327 | } 328 | #endif 329 | 330 | return 0; 331 | 332 | bail: 333 | tinydir_close(dir); 334 | return -1; 335 | } 336 | 337 | _TINYDIR_FUNC 338 | int tinydir_open_sorted(tinydir_dir *dir, const _tinydir_char_t *path) 339 | { 340 | /* Count the number of files first, to pre-allocate the files array */ 341 | size_t n_files = 0; 342 | if (tinydir_open(dir, path) == -1) 343 | { 344 | return -1; 345 | } 346 | while (dir->has_next) 347 | { 348 | n_files++; 349 | if (tinydir_next(dir) == -1) 350 | { 351 | goto bail; 352 | } 353 | } 354 | tinydir_close(dir); 355 | 356 | if (tinydir_open(dir, path) == -1) 357 | { 358 | return -1; 359 | } 360 | 361 | dir->n_files = 0; 362 | dir->_files = (tinydir_file *)_TINYDIR_MALLOC(sizeof *dir->_files * n_files); 363 | if (dir->_files == NULL) 364 | { 365 | goto bail; 366 | } 367 | while (dir->has_next) 368 | { 369 | tinydir_file *p_file; 370 | dir->n_files++; 371 | 372 | p_file = &dir->_files[dir->n_files - 1]; 373 | if (tinydir_readfile(dir, p_file) == -1) 374 | { 375 | goto bail; 376 | } 377 | 378 | if (tinydir_next(dir) == -1) 379 | { 380 | goto bail; 381 | } 382 | 383 | /* Just in case the number of files has changed between the first and 384 | second reads, terminate without writing into unallocated memory */ 385 | if (dir->n_files == n_files) 386 | { 387 | break; 388 | } 389 | } 390 | 391 | qsort(dir->_files, dir->n_files, sizeof(tinydir_file), _tinydir_file_cmp); 392 | 393 | return 0; 394 | 395 | bail: 396 | tinydir_close(dir); 397 | return -1; 398 | } 399 | 400 | _TINYDIR_FUNC 401 | void tinydir_close(tinydir_dir *dir) 402 | { 403 | if (dir == NULL) 404 | { 405 | return; 406 | } 407 | 408 | memset(dir->path, 0, sizeof(dir->path)); 409 | dir->has_next = 0; 410 | dir->n_files = 0; 411 | _TINYDIR_FREE(dir->_files); 412 | dir->_files = NULL; 413 | #ifdef _MSC_VER 414 | if (dir->_h != INVALID_HANDLE_VALUE) 415 | { 416 | FindClose(dir->_h); 417 | } 418 | dir->_h = INVALID_HANDLE_VALUE; 419 | #else 420 | if (dir->_d) 421 | { 422 | _tinydir_closedir(dir->_d); 423 | } 424 | dir->_d = NULL; 425 | dir->_e = NULL; 426 | #ifndef _TINYDIR_USE_READDIR 427 | _TINYDIR_FREE(dir->_ep); 428 | dir->_ep = NULL; 429 | #endif 430 | #endif 431 | } 432 | 433 | _TINYDIR_FUNC 434 | int tinydir_next(tinydir_dir *dir) 435 | { 436 | if (dir == NULL) 437 | { 438 | errno = EINVAL; 439 | return -1; 440 | } 441 | if (!dir->has_next) 442 | { 443 | errno = ENOENT; 444 | return -1; 445 | } 446 | 447 | #ifdef _MSC_VER 448 | if (FindNextFile(dir->_h, &dir->_f) == 0) 449 | #else 450 | #ifdef _TINYDIR_USE_READDIR 451 | dir->_e = _tinydir_readdir(dir->_d); 452 | #else 453 | if (dir->_ep == NULL) 454 | { 455 | return -1; 456 | } 457 | if (readdir_r(dir->_d, dir->_ep, &dir->_e) != 0) 458 | { 459 | return -1; 460 | } 461 | #endif 462 | if (dir->_e == NULL) 463 | #endif 464 | { 465 | dir->has_next = 0; 466 | #ifdef _MSC_VER 467 | if (GetLastError() != ERROR_SUCCESS && 468 | GetLastError() != ERROR_NO_MORE_FILES) 469 | { 470 | tinydir_close(dir); 471 | errno = EIO; 472 | return -1; 473 | } 474 | #endif 475 | } 476 | 477 | return 0; 478 | } 479 | 480 | _TINYDIR_FUNC 481 | int tinydir_readfile(const tinydir_dir *dir, tinydir_file *file) 482 | { 483 | if (dir == NULL || file == NULL) 484 | { 485 | errno = EINVAL; 486 | return -1; 487 | } 488 | #ifdef _MSC_VER 489 | if (dir->_h == INVALID_HANDLE_VALUE) 490 | #else 491 | if (dir->_e == NULL) 492 | #endif 493 | { 494 | errno = ENOENT; 495 | return -1; 496 | } 497 | if (_tinydir_strlen(dir->path) + 498 | _tinydir_strlen( 499 | #ifdef _MSC_VER 500 | dir->_f.cFileName 501 | #else 502 | dir->_e->d_name 503 | #endif 504 | ) + 1 + _TINYDIR_PATH_EXTRA >= 505 | _TINYDIR_PATH_MAX) 506 | { 507 | /* the path for the file will be too long */ 508 | errno = ENAMETOOLONG; 509 | return -1; 510 | } 511 | if (_tinydir_strlen( 512 | #ifdef _MSC_VER 513 | dir->_f.cFileName 514 | #else 515 | dir->_e->d_name 516 | #endif 517 | ) >= _TINYDIR_FILENAME_MAX) 518 | { 519 | errno = ENAMETOOLONG; 520 | return -1; 521 | } 522 | 523 | _tinydir_strcpy(file->path, dir->path); 524 | _tinydir_strcat(file->path, TINYDIR_STRING("/")); 525 | _tinydir_strcpy(file->name, 526 | #ifdef _MSC_VER 527 | dir->_f.cFileName 528 | #else 529 | dir->_e->d_name 530 | #endif 531 | ); 532 | _tinydir_strcat(file->path, file->name); 533 | #ifndef _MSC_VER 534 | #ifdef __MINGW32__ 535 | if (_tstat( 536 | #else 537 | if (stat( 538 | #endif 539 | file->path, &file->_s) == -1) 540 | { 541 | return -1; 542 | } 543 | #endif 544 | _tinydir_get_ext(file); 545 | 546 | file->is_dir = 547 | #ifdef _MSC_VER 548 | !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY); 549 | #else 550 | S_ISDIR(file->_s.st_mode); 551 | #endif 552 | file->is_reg = 553 | #ifdef _MSC_VER 554 | !!(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NORMAL) || 555 | ( 556 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DEVICE) && 557 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && 558 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED) && 559 | #ifdef FILE_ATTRIBUTE_INTEGRITY_STREAM 560 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_INTEGRITY_STREAM) && 561 | #endif 562 | #ifdef FILE_ATTRIBUTE_NO_SCRUB_DATA 563 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_NO_SCRUB_DATA) && 564 | #endif 565 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_OFFLINE) && 566 | !(dir->_f.dwFileAttributes & FILE_ATTRIBUTE_TEMPORARY)); 567 | #else 568 | S_ISREG(file->_s.st_mode); 569 | #endif 570 | 571 | return 0; 572 | } 573 | 574 | _TINYDIR_FUNC 575 | int tinydir_readfile_n(const tinydir_dir *dir, tinydir_file *file, size_t i) 576 | { 577 | if (dir == NULL || file == NULL) 578 | { 579 | errno = EINVAL; 580 | return -1; 581 | } 582 | if (i >= dir->n_files) 583 | { 584 | errno = ENOENT; 585 | return -1; 586 | } 587 | 588 | memcpy(file, &dir->_files[i], sizeof(tinydir_file)); 589 | _tinydir_get_ext(file); 590 | 591 | return 0; 592 | } 593 | 594 | _TINYDIR_FUNC 595 | int tinydir_open_subdir_n(tinydir_dir *dir, size_t i) 596 | { 597 | _tinydir_char_t path[_TINYDIR_PATH_MAX]; 598 | if (dir == NULL) 599 | { 600 | errno = EINVAL; 601 | return -1; 602 | } 603 | if (i >= dir->n_files || !dir->_files[i].is_dir) 604 | { 605 | errno = ENOENT; 606 | return -1; 607 | } 608 | 609 | _tinydir_strcpy(path, dir->_files[i].path); 610 | tinydir_close(dir); 611 | if (tinydir_open_sorted(dir, path) == -1) 612 | { 613 | return -1; 614 | } 615 | 616 | return 0; 617 | } 618 | 619 | /* Open a single file given its path */ 620 | _TINYDIR_FUNC 621 | int tinydir_file_open(tinydir_file *file, const _tinydir_char_t *path) 622 | { 623 | tinydir_dir dir; 624 | int result = 0; 625 | int found = 0; 626 | _tinydir_char_t dir_name_buf[_TINYDIR_PATH_MAX]; 627 | _tinydir_char_t file_name_buf[_TINYDIR_FILENAME_MAX]; 628 | _tinydir_char_t *dir_name; 629 | _tinydir_char_t *base_name; 630 | #if (defined _MSC_VER || defined __MINGW32__) 631 | _tinydir_char_t drive_buf[_TINYDIR_DRIVE_MAX]; 632 | _tinydir_char_t ext_buf[_TINYDIR_FILENAME_MAX]; 633 | #endif 634 | 635 | if (file == NULL || path == NULL || _tinydir_strlen(path) == 0) 636 | { 637 | errno = EINVAL; 638 | return -1; 639 | } 640 | if (_tinydir_strlen(path) + _TINYDIR_PATH_EXTRA >= _TINYDIR_PATH_MAX) 641 | { 642 | errno = ENAMETOOLONG; 643 | return -1; 644 | } 645 | 646 | /* Get the parent path */ 647 | #if (defined _MSC_VER || defined __MINGW32__) 648 | #if ((defined _MSC_VER) && (_MSC_VER >= 1400)) 649 | _tsplitpath_s( 650 | path, 651 | drive_buf, _TINYDIR_DRIVE_MAX, 652 | dir_name_buf, _TINYDIR_FILENAME_MAX, 653 | file_name_buf, _TINYDIR_FILENAME_MAX, 654 | ext_buf, _TINYDIR_FILENAME_MAX); 655 | #else 656 | _tsplitpath( 657 | path, 658 | drive_buf, 659 | dir_name_buf, 660 | file_name_buf, 661 | ext_buf); 662 | #endif 663 | 664 | /* _splitpath_s not work fine with only filename and widechar support */ 665 | #ifdef _UNICODE 666 | if (drive_buf[0] == L'\xFEFE') 667 | drive_buf[0] = '\0'; 668 | if (dir_name_buf[0] == L'\xFEFE') 669 | dir_name_buf[0] = '\0'; 670 | #endif 671 | 672 | if (errno) 673 | { 674 | errno = EINVAL; 675 | return -1; 676 | } 677 | /* Emulate the behavior of dirname by returning "." for dir name if it's 678 | empty */ 679 | if (drive_buf[0] == '\0' && dir_name_buf[0] == '\0') 680 | { 681 | _tinydir_strcpy(dir_name_buf, TINYDIR_STRING(".")); 682 | } 683 | /* Concatenate the drive letter and dir name to form full dir name */ 684 | _tinydir_strcat(drive_buf, dir_name_buf); 685 | dir_name = drive_buf; 686 | /* Concatenate the file name and extension to form base name */ 687 | _tinydir_strcat(file_name_buf, ext_buf); 688 | base_name = file_name_buf; 689 | #else 690 | _tinydir_strcpy(dir_name_buf, path); 691 | dir_name = dirname(dir_name_buf); 692 | _tinydir_strcpy(file_name_buf, path); 693 | base_name =basename(file_name_buf); 694 | #endif 695 | 696 | /* Open the parent directory */ 697 | if (tinydir_open(&dir, dir_name) == -1) 698 | { 699 | return -1; 700 | } 701 | 702 | /* Read through the parent directory and look for the file */ 703 | while (dir.has_next) 704 | { 705 | if (tinydir_readfile(&dir, file) == -1) 706 | { 707 | result = -1; 708 | goto bail; 709 | } 710 | if (_tinydir_strcmp(file->name, base_name) == 0) 711 | { 712 | /* File found */ 713 | found = 1; 714 | break; 715 | } 716 | tinydir_next(&dir); 717 | } 718 | if (!found) 719 | { 720 | result = -1; 721 | errno = ENOENT; 722 | } 723 | 724 | bail: 725 | tinydir_close(&dir); 726 | return result; 727 | } 728 | 729 | _TINYDIR_FUNC 730 | void _tinydir_get_ext(tinydir_file *file) 731 | { 732 | _tinydir_char_t *period = _tinydir_strrchr(file->name, TINYDIR_STRING('.')); 733 | if (period == NULL) 734 | { 735 | file->extension = &(file->name[_tinydir_strlen(file->name)]); 736 | } 737 | else 738 | { 739 | file->extension = period + 1; 740 | } 741 | } 742 | 743 | _TINYDIR_FUNC 744 | int _tinydir_file_cmp(const void *a, const void *b) 745 | { 746 | const tinydir_file *fa = (const tinydir_file *)a; 747 | const tinydir_file *fb = (const tinydir_file *)b; 748 | if (fa->is_dir != fb->is_dir) 749 | { 750 | return -(fa->is_dir - fb->is_dir); 751 | } 752 | return _tinydir_strncmp(fa->name, fb->name, _TINYDIR_FILENAME_MAX); 753 | } 754 | 755 | #ifndef _MSC_VER 756 | #ifndef _TINYDIR_USE_READDIR 757 | /* 758 | The following authored by Ben Hutchings 759 | from https://womble.decadent.org.uk/readdir_r-advisory.html 760 | */ 761 | /* Calculate the required buffer size (in bytes) for directory * 762 | * entries read from the given directory handle. Return -1 if this * 763 | * this cannot be done. * 764 | * * 765 | * This code does not trust values of NAME_MAX that are less than * 766 | * 255, since some systems (including at least HP-UX) incorrectly * 767 | * define it to be a smaller value. */ 768 | _TINYDIR_FUNC 769 | size_t _tinydir_dirent_buf_size(_TINYDIR_DIR *dirp) 770 | { 771 | long name_max; 772 | size_t name_end; 773 | /* parameter may be unused */ 774 | (void)dirp; 775 | 776 | #if defined _TINYDIR_USE_FPATHCONF 777 | name_max = fpathconf(dirfd(dirp), _PC_NAME_MAX); 778 | if (name_max == -1) 779 | #if defined(NAME_MAX) 780 | name_max = (NAME_MAX > 255) ? NAME_MAX : 255; 781 | #else 782 | return (size_t)(-1); 783 | #endif 784 | #elif defined(NAME_MAX) 785 | name_max = (NAME_MAX > 255) ? NAME_MAX : 255; 786 | #else 787 | #error "buffer size for readdir_r cannot be determined" 788 | #endif 789 | name_end = (size_t)offsetof(struct _tinydir_dirent, d_name) + name_max + 1; 790 | return (name_end > sizeof(struct _tinydir_dirent) ? 791 | name_end : sizeof(struct _tinydir_dirent)); 792 | } 793 | #endif 794 | #endif 795 | 796 | #ifdef __cplusplus 797 | } 798 | #endif 799 | 800 | # if defined (_MSC_VER) 801 | # pragma warning(pop) 802 | # endif 803 | 804 | #endif 805 | --------------------------------------------------------------------------------