├── .gitattributes ├── .gitignore ├── LICENCE ├── README.md ├── TODO.md ├── docs ├── README-API.md ├── README-Errors.md ├── README-MacroDefinitions.md ├── README-TypeDefinitions.md └── README.md ├── examples ├── example_console │ ├── README.md │ └── main.c ├── example_ppm │ ├── README.md │ ├── main.c │ └── output.ppm ├── example_raylib │ ├── CMakeLists.txt │ ├── README.md │ └── main.c ├── example_rgfw │ ├── README.md │ ├── RGFW.h │ └── main.c ├── example_sdl │ ├── CMakeLists.txt │ ├── README.md │ └── main.c ├── example_stbi │ ├── README.md │ ├── main.c │ ├── output.bmp │ ├── output.jpg │ ├── output.png │ ├── output.ppm │ ├── stb_image.h │ ├── stb_image_write.h │ └── turtle.png ├── example_template │ ├── README.md │ └── main.c ├── example_win32 │ ├── README.md │ └── main.c └── example_x11 │ ├── README.md │ └── main.c ├── res └── images │ ├── silk_banner.png │ ├── silk_banner.svg │ └── silk_logo.svg └── silk.h /.gitattributes: -------------------------------------------------------------------------------- 1 | # Sources 2 | *.c text diff=cpp 3 | *.cc text diff=cpp 4 | *.cxx text diff=cpp 5 | *.cpp text diff=cpp 6 | *.cpi text diff=cpp 7 | *.c++ text diff=cpp 8 | *.hpp text diff=cpp 9 | *.h text diff=cpp 10 | *.h++ text diff=cpp 11 | *.hh text diff=cpp 12 | 13 | # Compiled Object files 14 | *.slo binary 15 | *.lo binary 16 | *.o binary 17 | *.obj binary 18 | 19 | # Precompiled Headers 20 | *.gch binary 21 | *.pch binary 22 | 23 | # Compiled Dynamic libraries 24 | *.so binary 25 | *.dylib binary 26 | *.dll binary 27 | 28 | # Compiled Static libraries 29 | *.lai binary 30 | *.la binary 31 | *.a binary 32 | *.lib binary 33 | 34 | # Executables 35 | *.exe binary 36 | *.out binary 37 | *.app binary -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Prerequisites 2 | *.d 3 | 4 | # Object files 5 | *.o 6 | *.ko 7 | *.obj 8 | *.elf 9 | 10 | # Linker output 11 | *.ilk 12 | *.map 13 | *.exp 14 | 15 | # Precompiled Headers 16 | *.gch 17 | *.pch 18 | 19 | # Libraries 20 | *.lib 21 | *.a 22 | *.la 23 | *.lo 24 | 25 | # Shared objects (inc. Windows DLLs) 26 | *.dll 27 | *.so 28 | *.so.* 29 | *.dylib 30 | 31 | # Executables 32 | *.exe 33 | *.out 34 | *.app 35 | *.i*86 36 | *.x86_64 37 | *.hex 38 | 39 | # Debug files 40 | *.dSYM/ 41 | *.su 42 | *.idb 43 | *.pdb 44 | 45 | # Kernel Module Compile Results 46 | *.mod* 47 | *.cmd 48 | .tmp_versions/ 49 | modules.order 50 | Module.symvers 51 | Mkfile.old 52 | dkms.conf 53 | 54 | # Build directories 55 | **/bin/ 56 | **/build/ 57 | 58 | # editor files 59 | *.swp 60 | *.swo 61 | -------------------------------------------------------------------------------- /LICENCE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2024 Jakub Oleksiak 2 | 3 | Permission is hereby granted, free of charge, to any person obtaining a copy 4 | of this software and associated documentation files (the "Software"), to deal 5 | in the Software without restriction, including without limitation the rights 6 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 | copies of the Software, and to permit persons to whom the Software is 8 | furnished to do so, subject to the following conditions: 9 | 10 | The above copyright notice and this permission notice shall be included in all 11 | copies or substantial portions of the Software. 12 | 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 14 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 15 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 16 | IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 17 | DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 18 | OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 19 | OR OTHER DEALINGS IN THE SOFTWARE. -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | 4 | 5 |
6 | 7 | ## Introduction 8 | 9 | This is Silk - 2D single-header graphics library. 10 | The soul-purpose of this library is to give you the front-end for rendering graphics immediately to the screen. Everything works on CPU, completely on stack. 11 | Note that you MUST provide your own rendering and/or windowing back-end to work with Silk. 12 | 13 | ```c 14 | #include "your_backend_of_choosing.h" 15 | 16 | #define SILK_PIXELBUFFER_WIDTH 800 17 | #define SILK_PIXELBUFFER_HEIGHT 600 18 | 19 | #define SILK_IMPLEMENTATION 20 | #include "../../silk.h" 21 | 22 | i32 main(i32 argc, const string argv[]) { 23 | // Setting-up the main pixel-buffer 24 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT] = { 0 }; 25 | 26 | // Set-up your back-end here ... 27 | 28 | while(true) { 29 | // Clearing the pixel-buffer to white (0xffffffff -> #FFFFFFFF -> WHITE) 30 | silkClearPixelBufferColor(buffer, 0xffffffff); 31 | 32 | // Draw the red rectangle at the position in the middle of the pixel-buffer 33 | silkDrawRect( 34 | buffer, // pixel-buffer 35 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, // pixel-buffer size 36 | SILK_PIXELBUFFER_WIDTH, // pixel-buffer stride 37 | (vec2i) { SILK_PIXELBUFFER_CENTER_X, SILK_PIXELBUFFER_CENTER_Y }, // The position where we want to draw our red rectangle 38 | (vec2i) { 64, 64 }, // The size of our red rectangle 39 | 0xff0000ff // The color of our rectangle (0xff0000ff -> #FF0000FF -> RED) 40 | ); 41 | 42 | // ... Blit your graphics using your back-end ... 43 | } 44 | 45 | // ... close your back-end here 46 | 47 | return 0; 48 | } 49 | ``` 50 | 51 | Check out [`examples`](./examples/) to see how you can do this with some of the most popular libraries! 52 | If you wish to extand the list of examples, check out the [`example template`](./examples/example_template/). You can also use it to build your application using Silk! 53 | 54 | You can also check out [`TODO.md`](./TODO.md) file to see the possible additions in the future! 55 | 56 | Lastly, check out the [`docs`](./docs/) for documentation. 57 | 58 | ## Setup 59 | ### 1. Getting started 60 | Get the `silk.h` header file into your project: 61 | - You can download the file directly form [GitHub](https://github.com/itsYakub/Silk/blob/main/silk.h) 62 | - You can clone this repository ... 63 | ```console 64 | $ git clone https://github.com/itsYakub/Silk.git 65 | ``` 66 | ... and then provide the directory to include `silk.h` into your project 67 | 68 | ### 2. Project setup 69 | Design of the single-header libraries allows us to simply include the header file in your project: 70 | 71 | ```c 72 | #include "silk.h" 73 | ``` 74 | 75 | *WARNING:* You must, at least and no more than only once, provide the special macro `SILK_IMPLEMENTATION` in one of your source files, before the include directive: 76 | ```c 77 | #define SILK_IMPLEMENTATION 78 | #include "silk.h" 79 | ``` 80 | This macro tells the preprocessor to not only include the function declarations, but also their defnitions. 81 | - Not calling this macro ever in your project causes the `undefined reference to ..` error. 82 | - Calling this macro multiple time throughout the project causes the `multiple definitions of ..` error. 83 | 84 | ## Examples 85 | This is the list of available examples provided by Silk: 86 | - [PPM Example](./examples/example_ppm/) 87 | - [X11 Example](./examples/example_x11/) 88 | - [SDL Example](./examples/example_sdl/) 89 | - [Raylib Example](./examples/example_raylib/) 90 | - [STB_Image Example](./examples/example_stbi/) 91 | - [RGFW Example](./examples/example_rgfw/) 92 | 93 | ## Credits 94 | 1. Inspiration: 95 | - [Olive.c](https://www.youtube.com/playlist?list=PLpM-Dvs8t0Va-Gb0Dp4d9t8yvNFHaKH6N) 96 | - [Programming a first person shooter from scratch like it's 1995](https://www.youtube.com/watch?v=fSjc8vLMg8c) 97 | - [nothings/stb](https://github.com/nothings/stb) 98 | 99 | 2. Sources: 100 | - [My previous project: Soft](https://github.com/itsYakub/Soft/blob/main/src/soft.c) 101 | - [DDA Algorithm / Line-Drawing algorithm](https://en.wikipedia.org/wiki/Digital_differential_analyzer_(graphics_algorithm)) 102 | - [Circle-Drawing algorithm](https://youtu.be/LmQKZmQh1ZQ?list=PLpM-Dvs8t0Va-Gb0Dp4d9t8yvNFHaKH6N&t=3088) 103 | - [Triangle-Drawing algorithm](https://github.com/tsoding/olive.c/commit/633c657dbea3435a64114570ecb3f703fa276f28) 104 | - [Equations for equilateral triangle vertices](https://www.quora.com/How-do-you-calculate-the-triangle-vertices-coordinates-on-a-circumcircle-triangle-with-a-given-centre-point-and-radius-Assuming-the-triangle-is-acute-with-all-equal-length-sides-and-that-one-point-is-straight-up) 105 | 106 | ## Licence 107 | This project is under the [MIT Licence](./LICENCE). 108 | -------------------------------------------------------------------------------- /TODO.md: -------------------------------------------------------------------------------- 1 | # Silk TODO List: 2 | ## 1. Silk: 3 | - [X] **Shape rotation**; 4 | - [X] **Star shape rendering** (with `n` number of rays); 5 | - [X] **Primitive text rendering;** 6 | - [ ] **Optimization**; 7 | 8 | ## 2. Examples: 9 | - [X] **Raylib example**; 10 | - [X] **stb_image.h example**; 11 | - [X] **RGFW & RSGL example**; 12 | - [X] **Win32 example;** 13 | 14 | ## 3. Repository: 15 | - [X] **Finish [README.md](./README.md)**; 16 | - [ ] **Expand the examples README's**; 17 | - [ ] **Separate the examples to functionalities and platforms (or maybe move the platform examples to their own directory called "implementations")** -------------------------------------------------------------------------------- /docs/README-API.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk Documentation - API 4 | 5 |
6 | 7 | You can find the official Silk API in the **[silk.h](../silk.h)** file, under the `SECTION: API` title. 8 | 9 | ## Naming convention 10 | 11 | Rule of naming is like this: 12 | ```c 13 | SILK_API i32 silkDoSomething(...); 14 | ``` 15 | Let's talk about it's structure: 16 | - **`SILK_API`** - the key-word added to each publically-available function in Silk. 17 | - **`i32`** - integer return type. Almost every Silk function returns the exit value: `SILK_SUCCESS` and `SILK_FAILURE`. Depending on the circumstances, if the functions executes without any issue it will return `SILK_SUCCESS` (Macro for the value: 0), or if there'll be some problem, and function won't execute completely (i.e. the value NULL was passed) it will return `SILK_FAILURE` (Macro for the value: 1). 18 | - **`silkDoSomething`** - every Silk function is prefixed with the word `silk`. This is the common practice for C libraries, as this language doesn't support namespacing, thus to distinguish that the function belongs to this library it's prefixed by something connected to it. 19 | - **`...`** - function parameters. For readability and simplicity Silk follows some simple rules of parameter naming and ordering (i.e. every buffer-manipulation function starts it's parameter list with `pixel* buf` parameter). 20 | 21 | ## Functions 22 | 23 | API is organised by *Modules* for each separate topic and use. 24 | The API consists of: 25 | ### 1. SECTION MODULE: Pixel buffer 26 | - **`SILK_API i32 silkClearPixelBuffer(pixel* buf)`** - clear the pixel buffer; set all the pixels from the buffer to 0. 27 | 28 | - **`SILK_API i32 silkClearPixelBufferRegion(pixel* buf, vec2i size)`** - clear the pixel buffer in the specified region. The range in the refresh happens is: (0, 0) -> (size.x, size.y). 29 | 30 | - **`SILK_API i32 silkClearPixelBufferColor(pixel* buf, pixel **pix)`** - clears the pixel buffer with the color specified by `pix`. 31 | 32 | - **`SILK_API i32 silkClearPixelBufferColorRegion(pixel* buf, vec2i size, pixel **pix)`** - clear the pixel buffer in the specified region with the color specified by `pix`. The range in the refresh happens is: (0, 0) -> (size.x, size.y). 33 | 34 | - **`SILK_API pixel silkGetPixel(pixel* buf, vec2i position, vec2i size)`** - gets the pixel color from the specified `position`, bounded to the `size`. 35 | 36 | - **`SILK_API i32 silkSetPixel(pixel* buf, vec2i position, vec2i size, pixel **pix)`** - sets the color of the pixel to the color `pix` at the specific `position`, bounded to the `size`. 37 | 38 | - **`SILK_API i32 silkUnloadBuffer(pixel* buf)`** - unloads the dynamically allocated pixel buffer (i. e. images). 39 | 40 | ### 2. SECTION MODULE: Pixels and Colors 41 | - **`SILK_API color silkPixelToColor(pixel **pix)`** - converts pixel to color; 42 | 43 | - **`SILK_API pixel silkColorToPixel(color col)`** - converts color to pixel; 44 | 45 | - **`SILK_API pixel silkAlphaBlend(pixel base_pixel, pixel return_pixel, color_channel value)`** - blends the pixel `return_pixel` with the `base_pixel` by the `value` color channel. 46 | 47 | - **`SILK_API pixel silkPixelFade(pixel pix, f32 factor)`** - fades the color `pix` by the `factor` (0.0 - 1.0). 48 | 49 | - **`SILK_API pixel silkPixelTint(pixel pix, pixel tint)`** - tints the color `pix` with the `tint`. 50 | 51 | ### 3. SECTION MODULE: Rendering 52 | - **`SILK_API i32 silkDrawPixel(pixel* buf, vec2i position, pixel **pix)`** - draws the pixel `pix` at the specified `position`. 53 | 54 | - **`SILK_API i32 silkDrawLine(pixel* buf, vec2i start, vec2i end, pixel **pix)`** - draws the line from `start` to `end` using the color `pix`. 55 | 56 | - **`SILK_API i32 silkDrawRect(pixel* buf, vec2i position, vec2i size, pixel **pix)`** - draws the rectangle of a color `pix` at the specified `position` with specified `size`. 57 | 58 | - **`SILK_API i32 silkDrawRectPro(pixel* buf, vec2i position, vec2i size, i32 angle, vec2i offset, pixel **pix)`** - draws the rectangle of a color `pix` at the specified `position`, corrected by the `offset`, with specified `size` and `angle`. 59 | 60 | - **`SILK_API i32 silkDrawRectLines(pixel* buf, vec2i position, vec2i size, i32 angle, vec2i offset, pixel **pix)`** - draws the lines of the rectangle of a color `pix` at the specified `position`, corected by the `offset`, with specified `size` and `angle`. 61 | 62 | - **`SILK_API i32 silkDrawCircle(pixel* buf, vec2i position, i32 radius, pixel **pix)`** - draws the circle of a color `pix` at the specified `position` with specified `radius`. 63 | 64 | - **`SILK_API i32 silkDrawCircleLines(pixel* buf, vec2i position, i32 radius, pixel **pix)`** - draws the lines of a circle of a color `pix` at the specified `position` with specified `radius`. 65 | 66 | - **`SILK_API i32 silkDrawTriangle(pixel* buf, vec2i point_a, vec2i point_b, vec2i point_c, pixel **pix)`** - draws the triangle of the color `pix` at the area specified by three points: `point_a`, `point_b` and `point_c`. 67 | 68 | - **`SILK_API i32 silkDrawTriangleLines(pixel* buf, vec2i point_a, vec2i point_b, vec2i point_c, pixel **pix)`** - draws the lines of a triangle of the color `pix` at the area specified by three points: `point_a`, `point_b` and `point_c`. 69 | 70 | - **`SILK_API i32 silkDrawTriangleEquilateral(pixel* buf, vec2i position, i32 radius, i32 angle, pixel **pix)`** - draws the equilateral triangle of the color `pix` at the specified `position` with specified `radius` and `angle`. 71 | 72 | - **`SILK_API i32 silkDrawTriangleEquilateralLines(pixel* buf, vec2i position, i32 radius, i32 angle, pixel **pix)`** - draws the lines of a equilateral triangle of the color `pix` at the specified `position` with specified `radius` and `angle`. 73 | 74 | - **`SILK_API i32 silkDrawPolygon(pixel* buf, vec2i position, i32 radius, i32 angle, i32 n, pixel **pix)`** - draws the `n`-sided polygon of the color `pix` at the specified `position` with specified `radius` and `angle`. 75 | 76 | - **`SILK_API i32 silkDrawStar(pixel* buf, vec2i position, i32 radius, i32 angle, i32 n, pixel **pix)`** - draws the `n`-armed star of the color `pix` at the specified `position` with specified `radius` and `angle`. 77 | 78 | - **`SILK_API i32 silkDrawBuffer(pixel* buf, pixel* img_buf, vec2i position, vec2i size)`** - draws the image buffer `img_buf` at the specified `position` with specified `size`. 79 | 80 | - **`SILK_API i32 silkDrawBufferScaled(pixel* buf, pixel* img_buf, vec2i position, vec2i size_src, vec2i size_dest)`** - draws the image buffer `img_buf` at the specified `position`, scaled from `size_src` to `size_dest`. 81 | 82 | - **`SILK_API i32 silkDrawBufferPro(pixel* buf, pixel* img_buf, vec2i position, vec2i offset, vec2i size_src, vec2i size_dest, pixel tint)`** - draws the image buffer `img_buf` tinted with `tint` at the specified `position`, corrected by the `offset`, scaled from `size_src` to `size_dest`. 83 | 84 | *NOTE: Before we start we should mention the structure of these function parameters. Let's see:* 85 | ```c 86 | SILK_API i32 silkDrawRectLines( 87 | pixel* buf, 88 | vec2i position, 89 | vec2i size, 90 | i32 angle, 91 | vec2i offset, 92 | pixel pix 93 | ) 94 | ``` 95 | *This function consists of the simple parameter structure that every other rendering function adapt:* 96 | - `pixel* buf` - pixel buffer that we renders into; 97 | - `vec2i position` - position at which we want to render our object; 98 | - `vec2i size` / `i32 radius` - the size or the radius of the object; 99 | - `vec2i offset` - the origin point of drawing our object, relative to it's position; 100 | - `pixel pix` / `pixel tint` - the color of our object OR the tint of our object; 101 | 102 | ### 4. SECTION MODULE: Logging 103 | - **`SILK_API i32 silkLogInfo(const string text, ...)`** - prints the information message to the console (prefixed with: **[INFO]**). 104 | - **`SILK_API i32 silkLogWarn(const string text, ...)`** - prints the warning message to the console (prefixed with: **[WARN]**). 105 | - **`SILK_API i32 silkLogErr(const string text, ...)`** - prints the error message to the console (prefixed with: **[ERR]**). 106 | - **`SILK_API i32 silkLogAlphaBlendStatus()`** - prints the current state of alpha-blending (**ENABLED|DISABLED**). 107 | - **`SILK_API i32 silkLogByteOrderStatus()`** - prints the current byte ordering (**LITTLE ENDIAN|BIG ENDIAN**). 108 | 109 | ### 5. SECTION MODULE: Math 110 | - **`SILK_API i32 silkVectorSwap(vec2i* a, vec2i* b)`** - swaps the vector `a` with `b` and vice versa. 111 | - **`SILK_API i32 silkIntSwap(i32* a, i32* b)`** - swaps the integer `a` with `b` and vice versa. 112 | 113 | ### 6. SECTION MODULE: IO 114 | - **`SILK_API pixel* silkLoadPPM(const string path, vec2i* size)`** - deserializes the PPM image format from the `path` and sets the `size` vector to it's resolution. 115 | - **`SILK_API i32 silkSavePPM(pixel* buf, const string path)`** - serializes the PPM image format to the `path`. 116 | 117 | ### 7. SECTION MODULE: Error-Logging 118 | - **`SILK_API string silkGetError()`** - prints the latest internal error to the console. -------------------------------------------------------------------------------- /docs/README-Errors.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk Documentation - Error Messages 4 | 5 |
6 | 7 | You can find the list of Silk's error messages in the **[silk.h](../silk.h)** file, under the `SECTION MODULE: Error Messages` title. 8 | 9 | Here's the list of error messages internally used by Silk: 10 | ## General: 11 | - **"Error message NULL or Empty."** - error message wasn't registered yet OR is set to NULL. 12 | 13 | - **"Undefined behaviour."** - the behaviour that causes this error is undefined. 14 | 15 | ## Buffer: 16 | - **"Passed the invalid pixel buffer."** - there was the invalid pixel buffer *(most likely: NULL)* passed to the function. 17 | 18 | - **"Passed the invalid image buffer."** - there was the invalid image *(most likely: NULL)* passed to the function. 19 | 20 | - **"Trying to access the out-of-bounds buffer address."** - the index we tried to access is outside of the pixel buffer's boundaries. 21 | 22 | ## File: 23 | - **"Couldn't open the file."** - the file-opeining didn't finished correctly. -------------------------------------------------------------------------------- /docs/README-MacroDefinitions.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk Documentation - Macro Definitions 4 | 5 |
6 | 7 | You can find the list of Macro Definitions in the **[silk.h](../silk.h)** file, under the `SECTION: Macro Definitions` title. 8 | 9 | Here's the list of available macro definitions: 10 | - `SILK_IMPLEMENTATION` - This macro includes function definitions to the project, during the *preprocessor* compilation stage. 11 | 12 | *NOTE: This macro MUST be included only once. Otherwise there will be a multiple-definition error!* 13 | 14 | - `SILK_ALPHA_IGNORE` - Ignore alpha-channel during the color calculations. 15 | 16 | *NOTE: This macro disables alpha-blending, even if you define the `SILK_ALPHABLEND_ENABLE` macro.* 17 | 18 | - `SILK_ALPHABLEND_ENABLE` - Enables alpha-blending. 19 | 20 | *NOTE: This macro is defined by default. You can disable it by defining `SILK_ALPHABLEND_DISABLE`.* 21 | 22 | - `SILK_ALPHABLEND_DISABLE` - Disables alpha-blending. 23 | 24 | - `SILK_BYTEORDER_LITTLE_ENDIAN` - Byte order is little endian. 25 | 26 | - `SILK_BYTEORDER_BIG_ENDIAN` - Byte order is big endian. 27 | 28 | - `SILK_DISABLE_LOG_INFO` - Disables info-logging. 29 | 30 | - `SILK_DISABLE_LOG_WARN` - Disables warn-logging. 31 | 32 | - `SILK_DISABLE_LOG_ERR` - Disables error-logging. 33 | 34 | - `SILK_DISABLE_LOG_ALL` - Completely disables all logging (info, warn and err). -------------------------------------------------------------------------------- /docs/README-TypeDefinitions.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk Documentation - Type Definitions 4 | 5 |
6 | 7 | You can find the list of Type Definitions in the **[silk.h](../silk.h)** file, under the `SECTION: Typedefs` title. 8 | 9 | Here's the list of available macro definitions: 10 | - `i32` - 32-bit signed integer variable | **int**; 11 | - `f32` - 32-bit floating-point variable | **float**; 12 | - `u8` - 8-bit unsigned integer variable | **unsigned char**; 13 | - `u32` - 32-bit unsigned integer variable | **unsigned int**; 14 | - `string` - array of characters | **char***; 15 | - `color_channel` - singular color channel | **u8**; 16 | - `pixel` - singular pixel | **u32**; 17 | - `vec2i` - struct of two integers: x, y | **struct { i32 x; i32 y };** 18 | - `color` - struct of four color channels: r, g, b, a | **struct { color_channel r; color_channel g; color_channel b; color_channel a; };** 19 | -------------------------------------------------------------------------------- /docs/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk - 2D single-header graphics library 4 | 5 |
6 | 7 | This is Silk - 2D single-header graphics library, which works entirely on CPU. 8 | The soul-purpose of this library is to give you the front-end for rendering graphics immediately to the screen. Everything works on CPU, completely on stack. 9 | 10 | This section is the official documentation for Silk. Here you'll find informations about: 11 | - [API](README-API.md) 12 | - [Macro Definitions](README-MacroDefinitions.md) 13 | - [Type Definitions](README-TypeDefinitions.md) 14 | - [Error Messages](README-Errors.md) -------------------------------------------------------------------------------- /examples/example_console/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - COnsole 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ cc main.c -o example.out 11 | $ ./example.out 12 | ``` -------------------------------------------------------------------------------- /examples/example_console/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // cc main.c -o example.out 3 | 4 | #include 5 | #include 6 | #include 7 | 8 | #define SILK_PIXELBUFFER_WIDTH 64 9 | #define SILK_PIXELBUFFER_HEIGHT 48 10 | 11 | #define SILK_IMPLEMENTATION 12 | #include "../../silk.h" 13 | 14 | i32 ConsoleBlit(pixel* buf) { 15 | if(buf == NULL) { 16 | silkLogErr("Raylib: Passed a NULL parameter: buffer."); 17 | 18 | return SILK_FAILURE; 19 | } 20 | 21 | for(int y = 0; y < SILK_PIXELBUFFER_HEIGHT; y++) { 22 | for(int x = 0; x < SILK_PIXELBUFFER_WIDTH; x++) { 23 | pixel pix = silkGetPixel( 24 | buf, 25 | (vec2i) { x, y }, 26 | SILK_PIXELBUFFER_WIDTH 27 | ); 28 | 29 | if(pix == 0x00000000) { 30 | putc(' ', stdout); 31 | putc(' ', stdout); 32 | } 33 | 34 | else { 35 | putc('#', stdout); 36 | putc('#', stdout); 37 | } 38 | } 39 | 40 | putc('\n', stdout); 41 | } 42 | 43 | printf("\033[%dA", SILK_PIXELBUFFER_HEIGHT); 44 | printf("\033[%dD", SILK_PIXELBUFFER_WIDTH); 45 | 46 | 47 | return SILK_SUCCESS; 48 | } 49 | 50 | i32 main(int argc, const string argv[]) { 51 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT]; 52 | i32 rotation = 0.0f; 53 | 54 | while(true) { 55 | silkClearPixelBuffer(buffer); 56 | silkDrawRectPro( 57 | buffer, 58 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 59 | SILK_PIXELBUFFER_WIDTH, 60 | (vec2i) { SILK_PIXELBUFFER_WIDTH / 2, SILK_PIXELBUFFER_HEIGHT / 2 }, 61 | (vec2i) { SILK_PIXELBUFFER_HEIGHT / 4, SILK_PIXELBUFFER_HEIGHT / 4 }, 62 | rotation++, 63 | (vec2i) { SILK_PIXELBUFFER_HEIGHT / 8, SILK_PIXELBUFFER_HEIGHT / 8 }, 64 | 0xffffffff 65 | ); 66 | 67 | ConsoleBlit(buffer); 68 | 69 | usleep(1000 / 60); 70 | } 71 | 72 | return 0; 73 | } -------------------------------------------------------------------------------- /examples/example_ppm/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - PPM 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ cc main.c -o example.out 11 | $ ./example.out 12 | ``` -------------------------------------------------------------------------------- /examples/example_ppm/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // cc main.c -o example.out 3 | 4 | #include 5 | 6 | #define SILK_PIXELBUFFER_WIDTH 800 7 | #define SILK_PIXELBUFFER_HEIGHT 600 8 | 9 | #define SILK_IMPLEMENTATION 10 | #include "../../silk.h" 11 | 12 | int main(int argc, const string argv[]) { 13 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT]; 14 | 15 | i32 rotation = 45; 16 | 17 | const string text = "Hello, PPM!"; 18 | const i32 text_size = 4; 19 | const i32 text_spacing = 1; 20 | 21 | silkClearPixelBufferColor(buffer, 0xffffffff); 22 | 23 | silkDrawRectPro( 24 | buffer, 25 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 26 | SILK_PIXELBUFFER_WIDTH, 27 | (vec2i) { 28 | SILK_PIXELBUFFER_CENTER_X, 29 | SILK_PIXELBUFFER_CENTER_Y 30 | }, 31 | (vec2i) { 32 | SILK_PIXELBUFFER_CENTER_Y / 2, 33 | SILK_PIXELBUFFER_CENTER_Y / 2 34 | }, 35 | rotation, 36 | (vec2i) { 37 | SILK_PIXELBUFFER_CENTER_Y / 4, 38 | SILK_PIXELBUFFER_CENTER_Y / 4 39 | }, 40 | 0xff0000ff 41 | ); 42 | 43 | silkDrawTextDefault( 44 | buffer, 45 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 46 | SILK_PIXELBUFFER_WIDTH, 47 | text, 48 | (vec2i) { 49 | SILK_PIXELBUFFER_CENTER_X - silkMeasureText(text, text_size, text_spacing).x / 2, 50 | SILK_PIXELBUFFER_CENTER_Y - silkMeasureText(text, text_size, text_spacing).y / 2 + SILK_PIXELBUFFER_CENTER_Y / 2 51 | }, 52 | text_size, 53 | text_spacing, 54 | 0xff000000 55 | ); 56 | 57 | image canvas_image = silkBufferToImage(buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }); 58 | silkSaveImage("output.ppm", &canvas_image); 59 | silkUnloadBuffer(canvas_image.data); 60 | 61 | return 0; 62 | } -------------------------------------------------------------------------------- /examples/example_ppm/output.ppm: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_ppm/output.ppm -------------------------------------------------------------------------------- /examples/example_raylib/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | cmake_minimum_required(VERSION 3.14) 2 | 3 | project(example.out) 4 | 5 | set(CMAKE_C_STANDARD 11) 6 | set(CMAKE_C_STANDARD_REQUIRED ON) 7 | 8 | include(FetchContent) 9 | FetchContent_Declare( 10 | raylib 11 | GIT_REPOSITORY https://github.com/raysan5/raylib.git 12 | GIT_TAG 5.0 13 | ) 14 | 15 | FetchContent_MakeAvailable(raylib) 16 | 17 | add_executable(${PROJECT_NAME} ${CMAKE_SOURCE_DIR}/main.c) 18 | target_link_libraries(${PROJECT_NAME} raylib -lm) -------------------------------------------------------------------------------- /examples/example_raylib/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - Raylib 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ mkdir bin/ 11 | $ cd bin/ 12 | $ cmake .. 13 | $ cmake --build . 14 | $ ./example.out 15 | ``` -------------------------------------------------------------------------------- /examples/example_raylib/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // $ mkdir bin/ 3 | // $ cd bin/ 4 | // $ cmake .. 5 | // > For debug build: 6 | // $ cmake .. -DCMAKE_BUILD_TYPE=Debug 7 | // > For release build: 8 | // $ cmake .. -DCMAKE_BUILD_TYPE=Release 9 | // $ cmake --build . 10 | 11 | #include "./bin/_deps/raylib-build/raylib/include/raylib.h" 12 | 13 | #define SILK_ALPHABLEND_ENABLE 14 | #define SILK_IMPLEMENTATION 15 | #include "../../silk.h" 16 | 17 | i32 RaylibSetup(Texture* texture) { 18 | SetConfigFlags(FLAG_WINDOW_RESIZABLE | FLAG_VSYNC_HINT); 19 | InitWindow( 20 | 800, 21 | 600, 22 | "Silk 1.0 - Raylib Example" 23 | ); 24 | 25 | if(!IsWindowReady()) { 26 | silkLogErr("Raylib: Couldn't create a Window"); 27 | 28 | return SILK_FAILURE; 29 | } 30 | 31 | Image raylib_image = GenImageColor( 32 | SILK_PIXELBUFFER_WIDTH, 33 | SILK_PIXELBUFFER_HEIGHT, 34 | BLANK 35 | ); 36 | 37 | ImageFormat(&raylib_image, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8); 38 | 39 | *texture = LoadTextureFromImage(raylib_image); 40 | UnloadImage(raylib_image); 41 | 42 | if(!IsTextureReady(*texture)) { 43 | silkLogErr("Raylib: Couldn't create a Texture"); 44 | 45 | return SILK_FAILURE; 46 | } 47 | 48 | return SILK_SUCCESS; 49 | } 50 | 51 | i32 RaylibBlit(pixel* buffer, Texture* texture) { 52 | if(buffer == NULL) { 53 | silkLogErr("Raylib: Passed a NULL parameter: buffer."); 54 | 55 | return SILK_FAILURE; 56 | } if(texture == NULL) { 57 | silkLogErr("Raylib: Passed a NULL parameter: texture."); 58 | 59 | return SILK_FAILURE; 60 | } 61 | 62 | UpdateTexture(*texture, buffer); 63 | 64 | BeginDrawing(); 65 | DrawTexture(*texture, 0, 0, WHITE); 66 | EndDrawing(); 67 | 68 | return SILK_SUCCESS; 69 | } 70 | 71 | i32 RaylibClose(Texture* texture) { 72 | if(texture == NULL) { 73 | silkLogErr("Raylib: Passed a NULL parameter: texture."); 74 | 75 | return SILK_FAILURE; 76 | } 77 | 78 | UnloadTexture(*texture); 79 | CloseWindow(); 80 | 81 | return SILK_SUCCESS; 82 | } 83 | 84 | int main(int argc, const string argv[]) { 85 | // Silk's pixel buffer 86 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT] = { 0 }; 87 | 88 | i32 rotation = 0; 89 | 90 | const string text = "Hello, raylib!"; 91 | const i32 text_size = 4; 92 | const i32 text_spacing = 1; 93 | 94 | // Raylib components 95 | Texture raylib_texture = { 0 }; 96 | 97 | // Setting-up Raylib components 98 | RaylibSetup(&raylib_texture); 99 | 100 | silkLogByteOrderStatus(); 101 | silkLogAlphaBlendStatus(); 102 | 103 | // Update-Render loop 104 | while(!WindowShouldClose()) { 105 | // Clearing the silk's pixel buffer 106 | silkClearPixelBufferColorRegion(buffer, (vec2i) { GetScreenWidth(), GetScreenHeight() }, SILK_PIXELBUFFER_WIDTH, 0xffffffff); 107 | 108 | silkDrawPolygon( 109 | buffer, 110 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 111 | SILK_PIXELBUFFER_WIDTH, 112 | (vec2i) { 113 | GetScreenWidth() / 2, 114 | GetScreenHeight() / 2 115 | }, 116 | 64, 117 | 0, 118 | 5, 119 | 0xff0000ff 120 | ); 121 | 122 | silkDrawTextDefault( 123 | buffer, 124 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 125 | SILK_PIXELBUFFER_WIDTH, 126 | text, 127 | (vec2i) { 128 | GetScreenWidth() / 2 - silkMeasureText(text, text_size, text_spacing).x / 2, 129 | GetScreenHeight() / 2 - silkMeasureText(text, text_size, text_spacing).y / 2 + GetScreenHeight() / 4 130 | }, 131 | text_size, 132 | text_spacing, 133 | 0xff000000 134 | ); 135 | 136 | // Displaying the graphics on the window 137 | RaylibBlit( 138 | buffer, 139 | &raylib_texture 140 | ); 141 | } 142 | 143 | // Closing Raylib 144 | RaylibClose(&raylib_texture); 145 | 146 | return 0; 147 | } 148 | -------------------------------------------------------------------------------- /examples/example_rgfw/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - RGFW 4 | 5 |
6 | 7 | - Example submited by: [@ColleagueRiley](https://github.com/ColleagueRiley) 8 | 9 | - Compilation command (on linux): 10 | ```console 11 | $ cc main.c -lX11 -lXrandr -lm -o example.out 12 | $ ./example.out 13 | ``` 14 | 15 | - Compilation command (on windows): 16 | ```console 17 | $ cc main.c -lgdi32 -lwinmm -o example.exe 18 | $ example.exe 19 | ``` 20 | 21 | - Compilation command (on macOS): 22 | ```console 23 | $ cc main.c -lm -framework Foundation -framework AppKit -framework CoreVideo -o example.out 24 | $ ./example.out 25 | ``` -------------------------------------------------------------------------------- /examples/example_rgfw/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command (linux): 2 | // - Compilation command (on linux): 3 | // cc main.c -lX11 -lXrandr -lm -o example.out 4 | // 5 | // - Compilation command (on windows): 6 | // cc main.c -lgdi32 -lwinmm -o example.exe 7 | // 8 | // Compilation command (on macOS): 9 | // cc main.c -lm -framework Foundation -framework AppKit -framework CoreVideo -o example.out 10 | 11 | #include 12 | #include 13 | 14 | #define RGFW_BUFFER 15 | #define RGFW_IMPLEMENTATION 16 | #include "RGFW.h" 17 | 18 | unsigned char icon[4 * 3 * 3] = {0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xFF}; 19 | 20 | size_t screenWidth = 0; 21 | #define SILK_PIXELBUFFER_WIDTH screenWidth 22 | #define SILK_PIXELBUFFER_HEIGHT 600 23 | 24 | #define SILK_IMPLEMENTATION 25 | #include "../../silk.h" 26 | 27 | int main(int argc, const string argv[]) { 28 | // RGFW components 29 | silkLogInfo("RGFW: Platform initialized successfully."); 30 | 31 | RGFW_window* window = RGFW_createWindow("Silk 1.0 - RGFW Example", RGFW_RECT(0, 0, 800, 600), RGFW_CENTER); 32 | 33 | RGFW_window_setIcon(window, icon, RGFW_AREA(3, 3), 4); 34 | screenWidth = RGFW_getScreenSize().w; 35 | 36 | // check blend status 37 | silkLogAlphaBlendStatus(); 38 | 39 | // Update-Render loop 40 | bool exit = false; 41 | u8 star = false; 42 | size_t angle = 0; 43 | u32 angleDir = 1; 44 | 45 | image img = silkBufferToImage((pixel*)icon, (vec2i) { 3, 3 }); 46 | 47 | vec2i circlePoint = {100, 100}; 48 | 49 | while(!exit) { 50 | // Dispatching window events 51 | while(RGFW_window_checkEvent(window)) { 52 | switch (window->event.type) { 53 | case RGFW_quit: { 54 | exit = true; 55 | break; 56 | } 57 | case RGFW_keyReleased: { 58 | switch (window->event.keyCode) { 59 | case RGFW_Return: { 60 | star = !star; 61 | RGFW_window_showMouse(window, !star); 62 | break; 63 | } 64 | case RGFW_Space: { 65 | star = (star) ? 0 : 3; 66 | RGFW_window_showMouse(window, !star); 67 | break; 68 | } 69 | case RGFW_BackSpace: { 70 | star = 0; 71 | RGFW_window_setMouse(window, icon, RGFW_AREA(3, 3), 4); 72 | break; 73 | } 74 | default: break; 75 | } 76 | 77 | } 78 | case RGFW_mouseButtonReleased: { 79 | if (window->event.button != 1) 80 | break; 81 | 82 | RGFW_rect r = {(window->r.w / 2) - 74, SILK_PIXELBUFFER_CENTER_Y - 64, 138, 128}; 83 | 84 | if (window->event.point.x >= r.x && window->event.point.x <= r.x + r.w && window->event.point.y >= r.y && window->event.point.y <= r.y + r.h) { 85 | angleDir = (angleDir == 1) ? -1 : 1; 86 | } 87 | 88 | silkDrawStar((pixel*)window->buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, SILK_PIXELBUFFER_WIDTH, (vec2i){window->event.point.x, window->event.point.y}, 10, 0, 8, 0xffeaddca); 89 | } 90 | } 91 | } 92 | 93 | // Clearing the silk's pixel buffer 94 | silkClearPixelBufferColor((pixel*)window->buffer, 0xff333333); 95 | 96 | // Draw the rectangle at the middle of the screen 97 | silkDrawRectPro( 98 | (pixel*)window->buffer, 99 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 100 | SILK_PIXELBUFFER_WIDTH, 101 | (vec2i) { (window->r.w / 2), SILK_PIXELBUFFER_CENTER_Y}, 102 | (vec2i) { 128, 128 }, 103 | angle, 104 | (vec2i) { 64, 64 }, 105 | 0xff0000ff 106 | ); 107 | angle += angleDir; 108 | 109 | silkDrawCircle((pixel*)window->buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, SILK_PIXELBUFFER_WIDTH, circlePoint, 20, 0xff00ff00); 110 | 111 | RGFW_vector v = RGFW_window_getMousePoint(window); 112 | if (star == 1) { 113 | silkDrawStar((pixel*)window->buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, SILK_PIXELBUFFER_WIDTH, (vec2i){v.x, v.y}, 10, 0, 5, 0xff00FFFF); 114 | } 115 | 116 | if (star == 3) 117 | silkDrawImage((pixel*)window->buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, SILK_PIXELBUFFER_WIDTH, &img, (vec2i){v.x, v.y}); 118 | 119 | if (RGFW_isPressedI(window, RGFW_Up)) 120 | circlePoint.y--; 121 | if (RGFW_isPressedI(window, RGFW_Down)) 122 | circlePoint.y++; 123 | if (RGFW_isPressedI(window, RGFW_Left)) 124 | circlePoint.x--; 125 | if (RGFW_isPressedI(window, RGFW_Right)) 126 | circlePoint.x++; 127 | 128 | // Displaying the graphics on the window 129 | RGFW_window_swapBuffers(window); 130 | } 131 | 132 | // Closing RGFW 133 | RGFW_window_close(window); 134 | 135 | return 0; 136 | } -------------------------------------------------------------------------------- /examples/example_sdl/CMakeLists.txt: -------------------------------------------------------------------------------- 1 | cmake_minimum_required(VERSION 3.14) 2 | 3 | project(example.out) 4 | 5 | set(CMAKE_C_STANDARD 11) 6 | set(CMAKE_C_STANDARD_REQUIRED ON) 7 | 8 | include(FetchContent) 9 | FetchContent_Declare( 10 | SDL2 11 | GIT_REPOSITORY https://github.com/libsdl-org/SDL.git 12 | GIT_TAG release-2.30.3 13 | ) 14 | 15 | FetchContent_MakeAvailable(SDL2) 16 | 17 | add_executable(${PROJECT_NAME} ${CMAKE_SOURCE_DIR}/main.c) 18 | target_link_libraries(${PROJECT_NAME} SDL2 -lm) -------------------------------------------------------------------------------- /examples/example_sdl/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - SDL 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ mkdir bin/ 11 | $ cd bin/ 12 | $ cmake .. 13 | $ cmake --build . 14 | $ ./example.out 15 | ``` -------------------------------------------------------------------------------- /examples/example_sdl/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // $ mkdir bin/ 3 | // $ cd bin/ 4 | // $ cmake .. 5 | // > For debug build: 6 | // $ cmake .. -DCMAKE_BUILD_TYPE=Debug 7 | // > For release build: 8 | // $ cmake .. -DCMAKE_BUILD_TYPE=Release 9 | // $ cmake --build . 10 | 11 | #include 12 | #include 13 | 14 | #include "bin/_deps/sdl2-src/include/SDL.h" 15 | #include "bin/_deps/sdl2-src/include/SDL_events.h" 16 | #include "bin/_deps/sdl2-src/include/SDL_render.h" 17 | #include "bin/_deps/sdl2-src/include/SDL_scancode.h" 18 | #include "bin/_deps/sdl2-src/include/SDL_video.h" 19 | 20 | #define SILK_IMPLEMENTATION 21 | #include "../../silk.h" 22 | 23 | i32 SDLSetup(SDL_Window** window, SDL_Renderer** renderer, SDL_Texture** texture) { 24 | if(SDL_Init(SDL_INIT_EVERYTHING) != 0) { 25 | silkLogErr("SDL: Couldn't initialize SDL."); 26 | return SILK_FAILURE; 27 | } 28 | 29 | silkLogInfo("SDL: Platform initialized successfully."); 30 | 31 | *window = SDL_CreateWindow( 32 | "Silk 1.0 - SDL Example", 33 | SDL_WINDOWPOS_CENTERED, 34 | SDL_WINDOWPOS_CENTERED, 35 | 800, 36 | 600, 37 | SDL_WINDOW_RESIZABLE 38 | ); 39 | 40 | if(window == NULL) { 41 | silkLogErr("SDL: Couldn't create an SDL Window."); 42 | SDL_Quit(); 43 | return SILK_FAILURE; 44 | } 45 | 46 | silkLogInfo("SDL: Window created successfully."); 47 | 48 | *renderer = SDL_CreateRenderer( 49 | *window, 50 | 0, 51 | 0 52 | ); 53 | 54 | if(*renderer == NULL) { 55 | silkLogErr("SDL: Couldn't create an SDL Renderer."); 56 | SDL_DestroyWindow(*window); 57 | SDL_Quit(); 58 | return SILK_FAILURE; 59 | } 60 | 61 | silkLogInfo("SDL: Renderer created successfully."); 62 | 63 | #if defined(SILK_BYTEORDER_LITTLE_ENDIAN) 64 | 65 | *texture = SDL_CreateTexture( 66 | *renderer, 67 | SDL_PIXELFORMAT_ABGR8888, 68 | SDL_TEXTUREACCESS_STREAMING, 69 | SILK_PIXELBUFFER_WIDTH, 70 | SILK_PIXELBUFFER_HEIGHT 71 | ); 72 | 73 | #elif defined (SILK_BYTEORDER_BIG_ENDIAN) 74 | 75 | *texture = SDL_CreateTexture( 76 | *renderer, 77 | SDL_PIXELFORMAT_RGBA8888, 78 | SDL_TEXTUREACCESS_STREAMING, 79 | SILK_PIXELBUFFER_WIDTH, 80 | SILK_PIXELBUFFER_HEIGHT 81 | ); 82 | 83 | #endif 84 | 85 | if(texture == NULL) { 86 | silkLogErr("SDL: Couldn't create an SDL Texture."); 87 | SDL_DestroyRenderer(*renderer); 88 | SDL_DestroyWindow(*window); 89 | SDL_Quit(); 90 | return SILK_FAILURE; 91 | } 92 | 93 | silkLogInfo("SDL: Texture created successfully."); 94 | 95 | return SILK_SUCCESS; 96 | } 97 | 98 | i32 SDLBlit(pixel* buffer, SDL_Window* window, SDL_Renderer* renderer, SDL_Texture* texture) { 99 | if(buffer == NULL) { 100 | silkLogErr("SDL: Passed a NULL parameter: buffer."); 101 | 102 | return SILK_FAILURE; 103 | } if(renderer == NULL) { 104 | silkLogErr("SDL: Passed a NULL parameter: renderer."); 105 | 106 | return SILK_FAILURE; 107 | } if(texture == NULL) { 108 | silkLogErr("SDL: Passed a NULL parameter: texture."); 109 | 110 | return SILK_FAILURE; 111 | } 112 | 113 | // TODO(yakub): 114 | // Fix the scaling of the texture 115 | // Currently displaying the final rendered image to the screen is malfunctioning 116 | 117 | vec2i sdl_window_size = { 0 }; 118 | SDL_GetWindowSize(window, &sdl_window_size.x, &sdl_window_size.y); 119 | 120 | SDL_Rect source_rect = { 121 | 0, 122 | 0, 123 | SILK_PIXELBUFFER_WIDTH, 124 | SILK_PIXELBUFFER_HEIGHT 125 | }; 126 | 127 | SDL_Rect destination_rect = { 128 | 0, 129 | 0, 130 | sdl_window_size.x, 131 | sdl_window_size.y 132 | }; 133 | 134 | SDL_UpdateTexture( 135 | texture, 136 | &destination_rect, 137 | buffer, 138 | SILK_PIXELBUFFER_WIDTH * sizeof(pixel) 139 | ); 140 | 141 | SDL_RenderCopyEx( 142 | renderer, 143 | texture, 144 | &destination_rect, 145 | &source_rect, 146 | 0.0, 147 | NULL, 148 | SDL_FLIP_NONE 149 | ); 150 | 151 | SDL_RenderPresent(renderer); 152 | 153 | return SILK_SUCCESS; 154 | } 155 | 156 | i32 SDLClose(SDL_Window* window, SDL_Renderer* renderer, SDL_Texture* texture) { 157 | if(window == NULL) { 158 | silkLogErr("SDL: Passed a NULL parameter: window."); 159 | 160 | return SILK_FAILURE; 161 | } if(renderer == NULL) { 162 | silkLogErr("SDL: Passed a NULL parameter: renderer."); 163 | 164 | return SILK_FAILURE; 165 | } if(texture == NULL) { 166 | silkLogErr("SDL: Passed a NULL parameter: texture."); 167 | 168 | return SILK_FAILURE; 169 | } 170 | 171 | SDL_DestroyTexture(texture); silkLogInfo("SDL: Texture unloaded successfully."); 172 | SDL_DestroyRenderer(renderer); silkLogInfo("SDL: Renderer unloaded successfully."); 173 | SDL_DestroyWindow(window); silkLogInfo("SDL: Window unloaded successfully."); 174 | SDL_Quit(); silkLogInfo("SDL: Closing."); 175 | 176 | return SILK_SUCCESS; 177 | } 178 | 179 | int main(int argc, const string argv[]) { 180 | // Silk's pixel buffer 181 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT]; 182 | 183 | i32 rotation = 0.0f; 184 | 185 | const string text = "Hello, SDL2!"; 186 | const i32 text_size = 4; 187 | const i32 text_spacing = 1; 188 | 189 | // SDL components 190 | SDL_Window* sdl_window; 191 | SDL_Renderer* sdl_renderer; 192 | SDL_Texture* sdl_texture; 193 | 194 | vec2i sdl_window_size = { 0 }; 195 | 196 | // Setting-up SDL components 197 | SDLSetup( 198 | &sdl_window, 199 | &sdl_renderer, 200 | &sdl_texture 201 | ); 202 | 203 | silkLogAlphaBlendStatus(); 204 | 205 | // Update-Render loop 206 | bool exit = false; 207 | while(!exit) { 208 | // Dispatching window events 209 | SDL_Event event = { 0 }; 210 | while(SDL_PollEvent(&event)) { 211 | switch (event.type) { 212 | case SDL_QUIT: { 213 | exit = true; 214 | } break; 215 | 216 | case SDL_KEYDOWN: { 217 | if(event.key.keysym.scancode == SDL_SCANCODE_SPACE) { 218 | silkLogInfo("%i, %i", sdl_window_size.x, sdl_window_size.y); 219 | } 220 | } 221 | } 222 | } 223 | 224 | SDL_GetWindowSize(sdl_window, &sdl_window_size.x, &sdl_window_size.y); 225 | 226 | // Clearing the silk's pixel buffer 227 | silkClearPixelBufferColorRegion(buffer, sdl_window_size, SILK_PIXELBUFFER_WIDTH, 0xffffffff); 228 | 229 | silkDrawStar( 230 | buffer, 231 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 232 | SILK_PIXELBUFFER_WIDTH, 233 | (vec2i) { 234 | sdl_window_size.x / 2, 235 | sdl_window_size.y / 2 236 | }, 237 | sdl_window_size.y / 8, 238 | rotation++, 239 | 5, 240 | 0xff0000ff 241 | ); 242 | 243 | silkDrawTextDefault( 244 | buffer, 245 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 246 | SILK_PIXELBUFFER_WIDTH, 247 | text, 248 | (vec2i) { 249 | sdl_window_size.x / 2 - silkMeasureText(text, text_size, text_spacing).x / 2, 250 | sdl_window_size.y / 2 - silkMeasureText(text, text_size, text_spacing).y / 2 + sdl_window_size.y / 4 251 | }, 252 | text_size, 253 | text_spacing, 254 | 0xff000000 255 | ); 256 | 257 | // Displaying the graphics on the window 258 | SDLBlit( 259 | buffer, 260 | sdl_window, 261 | sdl_renderer, 262 | sdl_texture 263 | ); 264 | } 265 | 266 | // Closing SDL 267 | SDLClose( 268 | sdl_window, 269 | sdl_renderer, 270 | sdl_texture 271 | ); 272 | 273 | return 0; 274 | } -------------------------------------------------------------------------------- /examples/example_stbi/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - STB_Image 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ cc main.c -o example.out -lm 11 | $ ./example.out 12 | ``` -------------------------------------------------------------------------------- /examples/example_stbi/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // cc main.c -o example.out -lm 3 | 4 | #include 5 | #include 6 | 7 | #define SILK_PIXELBUFFER_WIDTH 800 8 | #define SILK_PIXELBUFFER_HEIGHT 600 9 | 10 | #define SILK_INCLUDE_MODULE_STB_IMAGE 11 | #define SILK_MODULE_STB_IMAGE_PATH "./examples/example_stbi/stb_image.h" 12 | 13 | #define SILK_INCLUDE_MODULE_STB_IMAGE_WRITE 14 | #define SILK_MODULE_STB_IMAGE_WRITE_PATH "./examples/example_stbi/stb_image_write.h" 15 | 16 | #define SILK_IMPLEMENTATION 17 | #include "../../silk.h" 18 | 19 | int main(int argc, const string argv[]) { 20 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT] = { 0 }; 21 | 22 | image img = silkLoadImage("turtle.png"); 23 | 24 | const string text = "Hello, Stb_Image!"; 25 | const i32 text_size = 4; 26 | const i32 text_spacing = 1; 27 | 28 | silkClearPixelBufferColor(buffer, 0xffffffff); 29 | 30 | silkDrawImagePro( 31 | buffer, 32 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 33 | SILK_PIXELBUFFER_WIDTH, 34 | &img, 35 | (vec2i) { SILK_PIXELBUFFER_CENTER_X, SILK_PIXELBUFFER_CENTER_Y }, 36 | (vec2i) { img.size.x / 4, img.size.y / 4 }, 37 | (vec2i) { img.size.x / 2, img.size.y / 2 }, 38 | 0xffffffff 39 | ); 40 | 41 | silkDrawTextDefault( 42 | buffer, 43 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 44 | SILK_PIXELBUFFER_WIDTH, 45 | text, 46 | (vec2i) { 47 | SILK_PIXELBUFFER_CENTER_X - silkMeasureText(text, text_size, text_spacing).x / 2, 48 | SILK_PIXELBUFFER_CENTER_Y - silkMeasureText(text, text_size, text_spacing).y / 2 + SILK_PIXELBUFFER_CENTER_Y / 2 49 | }, 50 | text_size, 51 | text_spacing, 52 | 0xff000000 53 | ); 54 | 55 | image buffer_to_image = silkBufferToImage(buffer, (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }); 56 | 57 | silkSaveImage("output.png", &buffer_to_image); 58 | silkSaveImage("output.jpg", &buffer_to_image); 59 | silkSaveImage("output.bmp", &buffer_to_image); 60 | silkSaveImage("output.ppm", &buffer_to_image); 61 | 62 | silkUnloadBuffer(img.data); 63 | silkUnloadBuffer(buffer_to_image.data); 64 | 65 | return 0; 66 | } -------------------------------------------------------------------------------- /examples/example_stbi/output.bmp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_stbi/output.bmp -------------------------------------------------------------------------------- /examples/example_stbi/output.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_stbi/output.jpg -------------------------------------------------------------------------------- /examples/example_stbi/output.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_stbi/output.png -------------------------------------------------------------------------------- /examples/example_stbi/output.ppm: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_stbi/output.ppm -------------------------------------------------------------------------------- /examples/example_stbi/stb_image_write.h: -------------------------------------------------------------------------------- 1 | /* stb_image_write - v1.16 - public domain - http://nothings.org/stb 2 | writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 3 | no warranty implied; use at your own risk 4 | 5 | Before #including, 6 | 7 | #define STB_IMAGE_WRITE_IMPLEMENTATION 8 | 9 | in the file that you want to have the implementation. 10 | 11 | Will probably not work correctly with strict-aliasing optimizations. 12 | 13 | ABOUT: 14 | 15 | This header file is a library for writing images to C stdio or a callback. 16 | 17 | The PNG output is not optimal; it is 20-50% larger than the file 18 | written by a decent optimizing implementation; though providing a custom 19 | zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. 20 | This library is designed for source code compactness and simplicity, 21 | not optimal image file size or run-time performance. 22 | 23 | BUILDING: 24 | 25 | You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. 26 | You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace 27 | malloc,realloc,free. 28 | You can #define STBIW_MEMMOVE() to replace memmove() 29 | You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function 30 | for PNG compression (instead of the builtin one), it must have the following signature: 31 | unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); 32 | The returned data will be freed with STBIW_FREE() (free() by default), 33 | so it must be heap allocated with STBIW_MALLOC() (malloc() by default), 34 | 35 | UNICODE: 36 | 37 | If compiling for Windows and you wish to use Unicode filenames, compile 38 | with 39 | #define STBIW_WINDOWS_UTF8 40 | and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert 41 | Windows wchar_t filenames to utf8. 42 | 43 | USAGE: 44 | 45 | There are five functions, one for each image file format: 46 | 47 | int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); 48 | int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); 49 | int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); 50 | int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); 51 | int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); 52 | 53 | void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically 54 | 55 | There are also five equivalent functions that use an arbitrary write function. You are 56 | expected to open/close your file-equivalent before and after calling these: 57 | 58 | int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); 59 | int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); 60 | int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); 61 | int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); 62 | int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); 63 | 64 | where the callback is: 65 | void stbi_write_func(void *context, void *data, int size); 66 | 67 | You can configure it with these global variables: 68 | int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE 69 | int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression 70 | int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode 71 | 72 | 73 | You can define STBI_WRITE_NO_STDIO to disable the file variant of these 74 | functions, so the library will not use stdio.h at all. However, this will 75 | also disable HDR writing, because it requires stdio for formatted output. 76 | 77 | Each function returns 0 on failure and non-0 on success. 78 | 79 | The functions create an image file defined by the parameters. The image 80 | is a rectangle of pixels stored from left-to-right, top-to-bottom. 81 | Each pixel contains 'comp' channels of data stored interleaved with 8-bits 82 | per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is 83 | monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. 84 | The *data pointer points to the first byte of the top-left-most pixel. 85 | For PNG, "stride_in_bytes" is the distance in bytes from the first byte of 86 | a row of pixels to the first byte of the next row of pixels. 87 | 88 | PNG creates output files with the same number of components as the input. 89 | The BMP format expands Y to RGB in the file format and does not 90 | output alpha. 91 | 92 | PNG supports writing rectangles of data even when the bytes storing rows of 93 | data are not consecutive in memory (e.g. sub-rectangles of a larger image), 94 | by supplying the stride between the beginning of adjacent rows. The other 95 | formats do not. (Thus you cannot write a native-format BMP through the BMP 96 | writer, both because it is in BGR order and because it may have padding 97 | at the end of the line.) 98 | 99 | PNG allows you to set the deflate compression level by setting the global 100 | variable 'stbi_write_png_compression_level' (it defaults to 8). 101 | 102 | HDR expects linear float data. Since the format is always 32-bit rgb(e) 103 | data, alpha (if provided) is discarded, and for monochrome data it is 104 | replicated across all three channels. 105 | 106 | TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed 107 | data, set the global variable 'stbi_write_tga_with_rle' to 0. 108 | 109 | JPEG does ignore alpha channels in input data; quality is between 1 and 100. 110 | Higher quality looks better but results in a bigger image. 111 | JPEG baseline (no JPEG progressive). 112 | 113 | CREDITS: 114 | 115 | 116 | Sean Barrett - PNG/BMP/TGA 117 | Baldur Karlsson - HDR 118 | Jean-Sebastien Guay - TGA monochrome 119 | Tim Kelsey - misc enhancements 120 | Alan Hickman - TGA RLE 121 | Emmanuel Julien - initial file IO callback implementation 122 | Jon Olick - original jo_jpeg.cpp code 123 | Daniel Gibson - integrate JPEG, allow external zlib 124 | Aarni Koskela - allow choosing PNG filter 125 | 126 | bugfixes: 127 | github:Chribba 128 | Guillaume Chereau 129 | github:jry2 130 | github:romigrou 131 | Sergio Gonzalez 132 | Jonas Karlsson 133 | Filip Wasil 134 | Thatcher Ulrich 135 | github:poppolopoppo 136 | Patrick Boettcher 137 | github:xeekworx 138 | Cap Petschulat 139 | Simon Rodriguez 140 | Ivan Tikhonov 141 | github:ignotion 142 | Adam Schackart 143 | Andrew Kensler 144 | 145 | LICENSE 146 | 147 | See end of file for license information. 148 | 149 | */ 150 | 151 | #ifndef INCLUDE_STB_IMAGE_WRITE_H 152 | #define INCLUDE_STB_IMAGE_WRITE_H 153 | 154 | #include 155 | 156 | // if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' 157 | #ifndef STBIWDEF 158 | #ifdef STB_IMAGE_WRITE_STATIC 159 | #define STBIWDEF static 160 | #else 161 | #ifdef __cplusplus 162 | #define STBIWDEF extern "C" 163 | #else 164 | #define STBIWDEF extern 165 | #endif 166 | #endif 167 | #endif 168 | 169 | #ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations 170 | STBIWDEF int stbi_write_tga_with_rle; 171 | STBIWDEF int stbi_write_png_compression_level; 172 | STBIWDEF int stbi_write_force_png_filter; 173 | #endif 174 | 175 | #ifndef STBI_WRITE_NO_STDIO 176 | STBIWDEF int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); 177 | STBIWDEF int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); 178 | STBIWDEF int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); 179 | STBIWDEF int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); 180 | STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality); 181 | 182 | #ifdef STBIW_WINDOWS_UTF8 183 | STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input); 184 | #endif 185 | #endif 186 | 187 | typedef void stbi_write_func(void *context, void *data, int size); 188 | 189 | STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); 190 | STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); 191 | STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); 192 | STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); 193 | STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); 194 | 195 | STBIWDEF void stbi_flip_vertically_on_write(int flip_boolean); 196 | 197 | #endif//INCLUDE_STB_IMAGE_WRITE_H 198 | 199 | #ifdef STB_IMAGE_WRITE_IMPLEMENTATION 200 | 201 | #ifdef _WIN32 202 | #ifndef _CRT_SECURE_NO_WARNINGS 203 | #define _CRT_SECURE_NO_WARNINGS 204 | #endif 205 | #ifndef _CRT_NONSTDC_NO_DEPRECATE 206 | #define _CRT_NONSTDC_NO_DEPRECATE 207 | #endif 208 | #endif 209 | 210 | #ifndef STBI_WRITE_NO_STDIO 211 | #include 212 | #endif // STBI_WRITE_NO_STDIO 213 | 214 | #include 215 | #include 216 | #include 217 | #include 218 | 219 | #if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) 220 | // ok 221 | #elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) 222 | // ok 223 | #else 224 | #error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." 225 | #endif 226 | 227 | #ifndef STBIW_MALLOC 228 | #define STBIW_MALLOC(sz) malloc(sz) 229 | #define STBIW_REALLOC(p,newsz) realloc(p,newsz) 230 | #define STBIW_FREE(p) free(p) 231 | #endif 232 | 233 | #ifndef STBIW_REALLOC_SIZED 234 | #define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) 235 | #endif 236 | 237 | 238 | #ifndef STBIW_MEMMOVE 239 | #define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) 240 | #endif 241 | 242 | 243 | #ifndef STBIW_ASSERT 244 | #include 245 | #define STBIW_ASSERT(x) assert(x) 246 | #endif 247 | 248 | #define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) 249 | 250 | #ifdef STB_IMAGE_WRITE_STATIC 251 | static int stbi_write_png_compression_level = 8; 252 | static int stbi_write_tga_with_rle = 1; 253 | static int stbi_write_force_png_filter = -1; 254 | #else 255 | int stbi_write_png_compression_level = 8; 256 | int stbi_write_tga_with_rle = 1; 257 | int stbi_write_force_png_filter = -1; 258 | #endif 259 | 260 | static int stbi__flip_vertically_on_write = 0; 261 | 262 | STBIWDEF void stbi_flip_vertically_on_write(int flag) 263 | { 264 | stbi__flip_vertically_on_write = flag; 265 | } 266 | 267 | typedef struct 268 | { 269 | stbi_write_func *func; 270 | void *context; 271 | unsigned char buffer[64]; 272 | int buf_used; 273 | } stbi__write_context; 274 | 275 | // initialize a callback-based context 276 | static void stbi__start_write_callbacks(stbi__write_context *s, stbi_write_func *c, void *context) 277 | { 278 | s->func = c; 279 | s->context = context; 280 | } 281 | 282 | #ifndef STBI_WRITE_NO_STDIO 283 | 284 | static void stbi__stdio_write(void *context, void *data, int size) 285 | { 286 | fwrite(data,1,size,(FILE*) context); 287 | } 288 | 289 | #if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8) 290 | #ifdef __cplusplus 291 | #define STBIW_EXTERN extern "C" 292 | #else 293 | #define STBIW_EXTERN extern 294 | #endif 295 | STBIW_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide); 296 | STBIW_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default); 297 | 298 | STBIWDEF int stbiw_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input) 299 | { 300 | return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL); 301 | } 302 | #endif 303 | 304 | static FILE *stbiw__fopen(char const *filename, char const *mode) 305 | { 306 | FILE *f; 307 | #if defined(_WIN32) && defined(STBIW_WINDOWS_UTF8) 308 | wchar_t wMode[64]; 309 | wchar_t wFilename[1024]; 310 | if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename))) 311 | return 0; 312 | 313 | if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode))) 314 | return 0; 315 | 316 | #if defined(_MSC_VER) && _MSC_VER >= 1400 317 | if (0 != _wfopen_s(&f, wFilename, wMode)) 318 | f = 0; 319 | #else 320 | f = _wfopen(wFilename, wMode); 321 | #endif 322 | 323 | #elif defined(_MSC_VER) && _MSC_VER >= 1400 324 | if (0 != fopen_s(&f, filename, mode)) 325 | f=0; 326 | #else 327 | f = fopen(filename, mode); 328 | #endif 329 | return f; 330 | } 331 | 332 | static int stbi__start_write_file(stbi__write_context *s, const char *filename) 333 | { 334 | FILE *f = stbiw__fopen(filename, "wb"); 335 | stbi__start_write_callbacks(s, stbi__stdio_write, (void *) f); 336 | return f != NULL; 337 | } 338 | 339 | static void stbi__end_write_file(stbi__write_context *s) 340 | { 341 | fclose((FILE *)s->context); 342 | } 343 | 344 | #endif // !STBI_WRITE_NO_STDIO 345 | 346 | typedef unsigned int stbiw_uint32; 347 | typedef int stb_image_write_test[sizeof(stbiw_uint32)==4 ? 1 : -1]; 348 | 349 | static void stbiw__writefv(stbi__write_context *s, const char *fmt, va_list v) 350 | { 351 | while (*fmt) { 352 | switch (*fmt++) { 353 | case ' ': break; 354 | case '1': { unsigned char x = STBIW_UCHAR(va_arg(v, int)); 355 | s->func(s->context,&x,1); 356 | break; } 357 | case '2': { int x = va_arg(v,int); 358 | unsigned char b[2]; 359 | b[0] = STBIW_UCHAR(x); 360 | b[1] = STBIW_UCHAR(x>>8); 361 | s->func(s->context,b,2); 362 | break; } 363 | case '4': { stbiw_uint32 x = va_arg(v,int); 364 | unsigned char b[4]; 365 | b[0]=STBIW_UCHAR(x); 366 | b[1]=STBIW_UCHAR(x>>8); 367 | b[2]=STBIW_UCHAR(x>>16); 368 | b[3]=STBIW_UCHAR(x>>24); 369 | s->func(s->context,b,4); 370 | break; } 371 | default: 372 | STBIW_ASSERT(0); 373 | return; 374 | } 375 | } 376 | } 377 | 378 | static void stbiw__writef(stbi__write_context *s, const char *fmt, ...) 379 | { 380 | va_list v; 381 | va_start(v, fmt); 382 | stbiw__writefv(s, fmt, v); 383 | va_end(v); 384 | } 385 | 386 | static void stbiw__write_flush(stbi__write_context *s) 387 | { 388 | if (s->buf_used) { 389 | s->func(s->context, &s->buffer, s->buf_used); 390 | s->buf_used = 0; 391 | } 392 | } 393 | 394 | static void stbiw__putc(stbi__write_context *s, unsigned char c) 395 | { 396 | s->func(s->context, &c, 1); 397 | } 398 | 399 | static void stbiw__write1(stbi__write_context *s, unsigned char a) 400 | { 401 | if ((size_t)s->buf_used + 1 > sizeof(s->buffer)) 402 | stbiw__write_flush(s); 403 | s->buffer[s->buf_used++] = a; 404 | } 405 | 406 | static void stbiw__write3(stbi__write_context *s, unsigned char a, unsigned char b, unsigned char c) 407 | { 408 | int n; 409 | if ((size_t)s->buf_used + 3 > sizeof(s->buffer)) 410 | stbiw__write_flush(s); 411 | n = s->buf_used; 412 | s->buf_used = n+3; 413 | s->buffer[n+0] = a; 414 | s->buffer[n+1] = b; 415 | s->buffer[n+2] = c; 416 | } 417 | 418 | static void stbiw__write_pixel(stbi__write_context *s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char *d) 419 | { 420 | unsigned char bg[3] = { 255, 0, 255}, px[3]; 421 | int k; 422 | 423 | if (write_alpha < 0) 424 | stbiw__write1(s, d[comp - 1]); 425 | 426 | switch (comp) { 427 | case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case 428 | case 1: 429 | if (expand_mono) 430 | stbiw__write3(s, d[0], d[0], d[0]); // monochrome bmp 431 | else 432 | stbiw__write1(s, d[0]); // monochrome TGA 433 | break; 434 | case 4: 435 | if (!write_alpha) { 436 | // composite against pink background 437 | for (k = 0; k < 3; ++k) 438 | px[k] = bg[k] + ((d[k] - bg[k]) * d[3]) / 255; 439 | stbiw__write3(s, px[1 - rgb_dir], px[1], px[1 + rgb_dir]); 440 | break; 441 | } 442 | /* FALLTHROUGH */ 443 | case 3: 444 | stbiw__write3(s, d[1 - rgb_dir], d[1], d[1 + rgb_dir]); 445 | break; 446 | } 447 | if (write_alpha > 0) 448 | stbiw__write1(s, d[comp - 1]); 449 | } 450 | 451 | static void stbiw__write_pixels(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, void *data, int write_alpha, int scanline_pad, int expand_mono) 452 | { 453 | stbiw_uint32 zero = 0; 454 | int i,j, j_end; 455 | 456 | if (y <= 0) 457 | return; 458 | 459 | if (stbi__flip_vertically_on_write) 460 | vdir *= -1; 461 | 462 | if (vdir < 0) { 463 | j_end = -1; j = y-1; 464 | } else { 465 | j_end = y; j = 0; 466 | } 467 | 468 | for (; j != j_end; j += vdir) { 469 | for (i=0; i < x; ++i) { 470 | unsigned char *d = (unsigned char *) data + (j*x+i)*comp; 471 | stbiw__write_pixel(s, rgb_dir, comp, write_alpha, expand_mono, d); 472 | } 473 | stbiw__write_flush(s); 474 | s->func(s->context, &zero, scanline_pad); 475 | } 476 | } 477 | 478 | static int stbiw__outfile(stbi__write_context *s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void *data, int alpha, int pad, const char *fmt, ...) 479 | { 480 | if (y < 0 || x < 0) { 481 | return 0; 482 | } else { 483 | va_list v; 484 | va_start(v, fmt); 485 | stbiw__writefv(s, fmt, v); 486 | va_end(v); 487 | stbiw__write_pixels(s,rgb_dir,vdir,x,y,comp,data,alpha,pad, expand_mono); 488 | return 1; 489 | } 490 | } 491 | 492 | static int stbi_write_bmp_core(stbi__write_context *s, int x, int y, int comp, const void *data) 493 | { 494 | if (comp != 4) { 495 | // write RGB bitmap 496 | int pad = (-x*3) & 3; 497 | return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *) data,0,pad, 498 | "11 4 22 4" "4 44 22 444444", 499 | 'B', 'M', 14+40+(x*3+pad)*y, 0,0, 14+40, // file header 500 | 40, x,y, 1,24, 0,0,0,0,0,0); // bitmap header 501 | } else { 502 | // RGBA bitmaps need a v4 header 503 | // use BI_BITFIELDS mode with 32bpp and alpha mask 504 | // (straight BI_RGB with alpha mask doesn't work in most readers) 505 | return stbiw__outfile(s,-1,-1,x,y,comp,1,(void *)data,1,0, 506 | "11 4 22 4" "4 44 22 444444 4444 4 444 444 444 444", 507 | 'B', 'M', 14+108+x*y*4, 0, 0, 14+108, // file header 508 | 108, x,y, 1,32, 3,0,0,0,0,0, 0xff0000,0xff00,0xff,0xff000000u, 0, 0,0,0, 0,0,0, 0,0,0, 0,0,0); // bitmap V4 header 509 | } 510 | } 511 | 512 | STBIWDEF int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) 513 | { 514 | stbi__write_context s = { 0 }; 515 | stbi__start_write_callbacks(&s, func, context); 516 | return stbi_write_bmp_core(&s, x, y, comp, data); 517 | } 518 | 519 | #ifndef STBI_WRITE_NO_STDIO 520 | STBIWDEF int stbi_write_bmp(char const *filename, int x, int y, int comp, const void *data) 521 | { 522 | stbi__write_context s = { 0 }; 523 | if (stbi__start_write_file(&s,filename)) { 524 | int r = stbi_write_bmp_core(&s, x, y, comp, data); 525 | stbi__end_write_file(&s); 526 | return r; 527 | } else 528 | return 0; 529 | } 530 | #endif //!STBI_WRITE_NO_STDIO 531 | 532 | static int stbi_write_tga_core(stbi__write_context *s, int x, int y, int comp, void *data) 533 | { 534 | int has_alpha = (comp == 2 || comp == 4); 535 | int colorbytes = has_alpha ? comp-1 : comp; 536 | int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 537 | 538 | if (y < 0 || x < 0) 539 | return 0; 540 | 541 | if (!stbi_write_tga_with_rle) { 542 | return stbiw__outfile(s, -1, -1, x, y, comp, 0, (void *) data, has_alpha, 0, 543 | "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, (colorbytes + has_alpha) * 8, has_alpha * 8); 544 | } else { 545 | int i,j,k; 546 | int jend, jdir; 547 | 548 | stbiw__writef(s, "111 221 2222 11", 0,0,format+8, 0,0,0, 0,0,x,y, (colorbytes + has_alpha) * 8, has_alpha * 8); 549 | 550 | if (stbi__flip_vertically_on_write) { 551 | j = 0; 552 | jend = y; 553 | jdir = 1; 554 | } else { 555 | j = y-1; 556 | jend = -1; 557 | jdir = -1; 558 | } 559 | for (; j != jend; j += jdir) { 560 | unsigned char *row = (unsigned char *) data + j * x * comp; 561 | int len; 562 | 563 | for (i = 0; i < x; i += len) { 564 | unsigned char *begin = row + i * comp; 565 | int diff = 1; 566 | len = 1; 567 | 568 | if (i < x - 1) { 569 | ++len; 570 | diff = memcmp(begin, row + (i + 1) * comp, comp); 571 | if (diff) { 572 | const unsigned char *prev = begin; 573 | for (k = i + 2; k < x && len < 128; ++k) { 574 | if (memcmp(prev, row + k * comp, comp)) { 575 | prev += comp; 576 | ++len; 577 | } else { 578 | --len; 579 | break; 580 | } 581 | } 582 | } else { 583 | for (k = i + 2; k < x && len < 128; ++k) { 584 | if (!memcmp(begin, row + k * comp, comp)) { 585 | ++len; 586 | } else { 587 | break; 588 | } 589 | } 590 | } 591 | } 592 | 593 | if (diff) { 594 | unsigned char header = STBIW_UCHAR(len - 1); 595 | stbiw__write1(s, header); 596 | for (k = 0; k < len; ++k) { 597 | stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin + k * comp); 598 | } 599 | } else { 600 | unsigned char header = STBIW_UCHAR(len - 129); 601 | stbiw__write1(s, header); 602 | stbiw__write_pixel(s, -1, comp, has_alpha, 0, begin); 603 | } 604 | } 605 | } 606 | stbiw__write_flush(s); 607 | } 608 | return 1; 609 | } 610 | 611 | STBIWDEF int stbi_write_tga_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data) 612 | { 613 | stbi__write_context s = { 0 }; 614 | stbi__start_write_callbacks(&s, func, context); 615 | return stbi_write_tga_core(&s, x, y, comp, (void *) data); 616 | } 617 | 618 | #ifndef STBI_WRITE_NO_STDIO 619 | STBIWDEF int stbi_write_tga(char const *filename, int x, int y, int comp, const void *data) 620 | { 621 | stbi__write_context s = { 0 }; 622 | if (stbi__start_write_file(&s,filename)) { 623 | int r = stbi_write_tga_core(&s, x, y, comp, (void *) data); 624 | stbi__end_write_file(&s); 625 | return r; 626 | } else 627 | return 0; 628 | } 629 | #endif 630 | 631 | // ************************************************************************************************* 632 | // Radiance RGBE HDR writer 633 | // by Baldur Karlsson 634 | 635 | #define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) 636 | 637 | #ifndef STBI_WRITE_NO_STDIO 638 | 639 | static void stbiw__linear_to_rgbe(unsigned char *rgbe, float *linear) 640 | { 641 | int exponent; 642 | float maxcomp = stbiw__max(linear[0], stbiw__max(linear[1], linear[2])); 643 | 644 | if (maxcomp < 1e-32f) { 645 | rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; 646 | } else { 647 | float normalize = (float) frexp(maxcomp, &exponent) * 256.0f/maxcomp; 648 | 649 | rgbe[0] = (unsigned char)(linear[0] * normalize); 650 | rgbe[1] = (unsigned char)(linear[1] * normalize); 651 | rgbe[2] = (unsigned char)(linear[2] * normalize); 652 | rgbe[3] = (unsigned char)(exponent + 128); 653 | } 654 | } 655 | 656 | static void stbiw__write_run_data(stbi__write_context *s, int length, unsigned char databyte) 657 | { 658 | unsigned char lengthbyte = STBIW_UCHAR(length+128); 659 | STBIW_ASSERT(length+128 <= 255); 660 | s->func(s->context, &lengthbyte, 1); 661 | s->func(s->context, &databyte, 1); 662 | } 663 | 664 | static void stbiw__write_dump_data(stbi__write_context *s, int length, unsigned char *data) 665 | { 666 | unsigned char lengthbyte = STBIW_UCHAR(length); 667 | STBIW_ASSERT(length <= 128); // inconsistent with spec but consistent with official code 668 | s->func(s->context, &lengthbyte, 1); 669 | s->func(s->context, data, length); 670 | } 671 | 672 | static void stbiw__write_hdr_scanline(stbi__write_context *s, int width, int ncomp, unsigned char *scratch, float *scanline) 673 | { 674 | unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; 675 | unsigned char rgbe[4]; 676 | float linear[3]; 677 | int x; 678 | 679 | scanlineheader[2] = (width&0xff00)>>8; 680 | scanlineheader[3] = (width&0x00ff); 681 | 682 | /* skip RLE for images too small or large */ 683 | if (width < 8 || width >= 32768) { 684 | for (x=0; x < width; x++) { 685 | switch (ncomp) { 686 | case 4: /* fallthrough */ 687 | case 3: linear[2] = scanline[x*ncomp + 2]; 688 | linear[1] = scanline[x*ncomp + 1]; 689 | linear[0] = scanline[x*ncomp + 0]; 690 | break; 691 | default: 692 | linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; 693 | break; 694 | } 695 | stbiw__linear_to_rgbe(rgbe, linear); 696 | s->func(s->context, rgbe, 4); 697 | } 698 | } else { 699 | int c,r; 700 | /* encode into scratch buffer */ 701 | for (x=0; x < width; x++) { 702 | switch(ncomp) { 703 | case 4: /* fallthrough */ 704 | case 3: linear[2] = scanline[x*ncomp + 2]; 705 | linear[1] = scanline[x*ncomp + 1]; 706 | linear[0] = scanline[x*ncomp + 0]; 707 | break; 708 | default: 709 | linear[0] = linear[1] = linear[2] = scanline[x*ncomp + 0]; 710 | break; 711 | } 712 | stbiw__linear_to_rgbe(rgbe, linear); 713 | scratch[x + width*0] = rgbe[0]; 714 | scratch[x + width*1] = rgbe[1]; 715 | scratch[x + width*2] = rgbe[2]; 716 | scratch[x + width*3] = rgbe[3]; 717 | } 718 | 719 | s->func(s->context, scanlineheader, 4); 720 | 721 | /* RLE each component separately */ 722 | for (c=0; c < 4; c++) { 723 | unsigned char *comp = &scratch[width*c]; 724 | 725 | x = 0; 726 | while (x < width) { 727 | // find first run 728 | r = x; 729 | while (r+2 < width) { 730 | if (comp[r] == comp[r+1] && comp[r] == comp[r+2]) 731 | break; 732 | ++r; 733 | } 734 | if (r+2 >= width) 735 | r = width; 736 | // dump up to first run 737 | while (x < r) { 738 | int len = r-x; 739 | if (len > 128) len = 128; 740 | stbiw__write_dump_data(s, len, &comp[x]); 741 | x += len; 742 | } 743 | // if there's a run, output it 744 | if (r+2 < width) { // same test as what we break out of in search loop, so only true if we break'd 745 | // find next byte after run 746 | while (r < width && comp[r] == comp[x]) 747 | ++r; 748 | // output run up to r 749 | while (x < r) { 750 | int len = r-x; 751 | if (len > 127) len = 127; 752 | stbiw__write_run_data(s, len, comp[x]); 753 | x += len; 754 | } 755 | } 756 | } 757 | } 758 | } 759 | } 760 | 761 | static int stbi_write_hdr_core(stbi__write_context *s, int x, int y, int comp, float *data) 762 | { 763 | if (y <= 0 || x <= 0 || data == NULL) 764 | return 0; 765 | else { 766 | // Each component is stored separately. Allocate scratch space for full output scanline. 767 | unsigned char *scratch = (unsigned char *) STBIW_MALLOC(x*4); 768 | int i, len; 769 | char buffer[128]; 770 | char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; 771 | s->func(s->context, header, sizeof(header)-1); 772 | 773 | #ifdef __STDC_LIB_EXT1__ 774 | len = sprintf_s(buffer, sizeof(buffer), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); 775 | #else 776 | len = sprintf(buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x); 777 | #endif 778 | s->func(s->context, buffer, len); 779 | 780 | for(i=0; i < y; i++) 781 | stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp*x*(stbi__flip_vertically_on_write ? y-1-i : i)); 782 | STBIW_FREE(scratch); 783 | return 1; 784 | } 785 | } 786 | 787 | STBIWDEF int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const float *data) 788 | { 789 | stbi__write_context s = { 0 }; 790 | stbi__start_write_callbacks(&s, func, context); 791 | return stbi_write_hdr_core(&s, x, y, comp, (float *) data); 792 | } 793 | 794 | STBIWDEF int stbi_write_hdr(char const *filename, int x, int y, int comp, const float *data) 795 | { 796 | stbi__write_context s = { 0 }; 797 | if (stbi__start_write_file(&s,filename)) { 798 | int r = stbi_write_hdr_core(&s, x, y, comp, (float *) data); 799 | stbi__end_write_file(&s); 800 | return r; 801 | } else 802 | return 0; 803 | } 804 | #endif // STBI_WRITE_NO_STDIO 805 | 806 | 807 | ////////////////////////////////////////////////////////////////////////////// 808 | // 809 | // PNG writer 810 | // 811 | 812 | #ifndef STBIW_ZLIB_COMPRESS 813 | // stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() 814 | #define stbiw__sbraw(a) ((int *) (void *) (a) - 2) 815 | #define stbiw__sbm(a) stbiw__sbraw(a)[0] 816 | #define stbiw__sbn(a) stbiw__sbraw(a)[1] 817 | 818 | #define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a)) 819 | #define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0) 820 | #define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a))) 821 | 822 | #define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v)) 823 | #define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0) 824 | #define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0) 825 | 826 | static void *stbiw__sbgrowf(void **arr, int increment, int itemsize) 827 | { 828 | int m = *arr ? 2*stbiw__sbm(*arr)+increment : increment+1; 829 | void *p = STBIW_REALLOC_SIZED(*arr ? stbiw__sbraw(*arr) : 0, *arr ? (stbiw__sbm(*arr)*itemsize + sizeof(int)*2) : 0, itemsize * m + sizeof(int)*2); 830 | STBIW_ASSERT(p); 831 | if (p) { 832 | if (!*arr) ((int *) p)[1] = 0; 833 | *arr = (void *) ((int *) p + 2); 834 | stbiw__sbm(*arr) = m; 835 | } 836 | return *arr; 837 | } 838 | 839 | static unsigned char *stbiw__zlib_flushf(unsigned char *data, unsigned int *bitbuffer, int *bitcount) 840 | { 841 | while (*bitcount >= 8) { 842 | stbiw__sbpush(data, STBIW_UCHAR(*bitbuffer)); 843 | *bitbuffer >>= 8; 844 | *bitcount -= 8; 845 | } 846 | return data; 847 | } 848 | 849 | static int stbiw__zlib_bitrev(int code, int codebits) 850 | { 851 | int res=0; 852 | while (codebits--) { 853 | res = (res << 1) | (code & 1); 854 | code >>= 1; 855 | } 856 | return res; 857 | } 858 | 859 | static unsigned int stbiw__zlib_countm(unsigned char *a, unsigned char *b, int limit) 860 | { 861 | int i; 862 | for (i=0; i < limit && i < 258; ++i) 863 | if (a[i] != b[i]) break; 864 | return i; 865 | } 866 | 867 | static unsigned int stbiw__zhash(unsigned char *data) 868 | { 869 | stbiw_uint32 hash = data[0] + (data[1] << 8) + (data[2] << 16); 870 | hash ^= hash << 3; 871 | hash += hash >> 5; 872 | hash ^= hash << 4; 873 | hash += hash >> 17; 874 | hash ^= hash << 25; 875 | hash += hash >> 6; 876 | return hash; 877 | } 878 | 879 | #define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount)) 880 | #define stbiw__zlib_add(code,codebits) \ 881 | (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush()) 882 | #define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c) 883 | // default huffman tables 884 | #define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8) 885 | #define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9) 886 | #define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7) 887 | #define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8) 888 | #define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n)) 889 | #define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n)) 890 | 891 | #define stbiw__ZHASH 16384 892 | 893 | #endif // STBIW_ZLIB_COMPRESS 894 | 895 | STBIWDEF unsigned char * stbi_zlib_compress(unsigned char *data, int data_len, int *out_len, int quality) 896 | { 897 | #ifdef STBIW_ZLIB_COMPRESS 898 | // user provided a zlib compress implementation, use that 899 | return STBIW_ZLIB_COMPRESS(data, data_len, out_len, quality); 900 | #else // use builtin 901 | static unsigned short lengthc[] = { 3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258, 259 }; 902 | static unsigned char lengtheb[]= { 0,0,0,0,0,0,0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0 }; 903 | static unsigned short distc[] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577, 32768 }; 904 | static unsigned char disteb[] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 }; 905 | unsigned int bitbuf=0; 906 | int i,j, bitcount=0; 907 | unsigned char *out = NULL; 908 | unsigned char ***hash_table = (unsigned char***) STBIW_MALLOC(stbiw__ZHASH * sizeof(unsigned char**)); 909 | if (hash_table == NULL) 910 | return NULL; 911 | if (quality < 5) quality = 5; 912 | 913 | stbiw__sbpush(out, 0x78); // DEFLATE 32K window 914 | stbiw__sbpush(out, 0x5e); // FLEVEL = 1 915 | stbiw__zlib_add(1,1); // BFINAL = 1 916 | stbiw__zlib_add(1,2); // BTYPE = 1 -- fixed huffman 917 | 918 | for (i=0; i < stbiw__ZHASH; ++i) 919 | hash_table[i] = NULL; 920 | 921 | i=0; 922 | while (i < data_len-3) { 923 | // hash next 3 bytes of data to be compressed 924 | int h = stbiw__zhash(data+i)&(stbiw__ZHASH-1), best=3; 925 | unsigned char *bestloc = 0; 926 | unsigned char **hlist = hash_table[h]; 927 | int n = stbiw__sbcount(hlist); 928 | for (j=0; j < n; ++j) { 929 | if (hlist[j]-data > i-32768) { // if entry lies within window 930 | int d = stbiw__zlib_countm(hlist[j], data+i, data_len-i); 931 | if (d >= best) { best=d; bestloc=hlist[j]; } 932 | } 933 | } 934 | // when hash table entry is too long, delete half the entries 935 | if (hash_table[h] && stbiw__sbn(hash_table[h]) == 2*quality) { 936 | STBIW_MEMMOVE(hash_table[h], hash_table[h]+quality, sizeof(hash_table[h][0])*quality); 937 | stbiw__sbn(hash_table[h]) = quality; 938 | } 939 | stbiw__sbpush(hash_table[h],data+i); 940 | 941 | if (bestloc) { 942 | // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal 943 | h = stbiw__zhash(data+i+1)&(stbiw__ZHASH-1); 944 | hlist = hash_table[h]; 945 | n = stbiw__sbcount(hlist); 946 | for (j=0; j < n; ++j) { 947 | if (hlist[j]-data > i-32767) { 948 | int e = stbiw__zlib_countm(hlist[j], data+i+1, data_len-i-1); 949 | if (e > best) { // if next match is better, bail on current match 950 | bestloc = NULL; 951 | break; 952 | } 953 | } 954 | } 955 | } 956 | 957 | if (bestloc) { 958 | int d = (int) (data+i - bestloc); // distance back 959 | STBIW_ASSERT(d <= 32767 && best <= 258); 960 | for (j=0; best > lengthc[j+1]-1; ++j); 961 | stbiw__zlib_huff(j+257); 962 | if (lengtheb[j]) stbiw__zlib_add(best - lengthc[j], lengtheb[j]); 963 | for (j=0; d > distc[j+1]-1; ++j); 964 | stbiw__zlib_add(stbiw__zlib_bitrev(j,5),5); 965 | if (disteb[j]) stbiw__zlib_add(d - distc[j], disteb[j]); 966 | i += best; 967 | } else { 968 | stbiw__zlib_huffb(data[i]); 969 | ++i; 970 | } 971 | } 972 | // write out final bytes 973 | for (;i < data_len; ++i) 974 | stbiw__zlib_huffb(data[i]); 975 | stbiw__zlib_huff(256); // end of block 976 | // pad with 0 bits to byte boundary 977 | while (bitcount) 978 | stbiw__zlib_add(0,1); 979 | 980 | for (i=0; i < stbiw__ZHASH; ++i) 981 | (void) stbiw__sbfree(hash_table[i]); 982 | STBIW_FREE(hash_table); 983 | 984 | // store uncompressed instead if compression was worse 985 | if (stbiw__sbn(out) > data_len + 2 + ((data_len+32766)/32767)*5) { 986 | stbiw__sbn(out) = 2; // truncate to DEFLATE 32K window and FLEVEL = 1 987 | for (j = 0; j < data_len;) { 988 | int blocklen = data_len - j; 989 | if (blocklen > 32767) blocklen = 32767; 990 | stbiw__sbpush(out, data_len - j == blocklen); // BFINAL = ?, BTYPE = 0 -- no compression 991 | stbiw__sbpush(out, STBIW_UCHAR(blocklen)); // LEN 992 | stbiw__sbpush(out, STBIW_UCHAR(blocklen >> 8)); 993 | stbiw__sbpush(out, STBIW_UCHAR(~blocklen)); // NLEN 994 | stbiw__sbpush(out, STBIW_UCHAR(~blocklen >> 8)); 995 | memcpy(out+stbiw__sbn(out), data+j, blocklen); 996 | stbiw__sbn(out) += blocklen; 997 | j += blocklen; 998 | } 999 | } 1000 | 1001 | { 1002 | // compute adler32 on input 1003 | unsigned int s1=1, s2=0; 1004 | int blocklen = (int) (data_len % 5552); 1005 | j=0; 1006 | while (j < data_len) { 1007 | for (i=0; i < blocklen; ++i) { s1 += data[j+i]; s2 += s1; } 1008 | s1 %= 65521; s2 %= 65521; 1009 | j += blocklen; 1010 | blocklen = 5552; 1011 | } 1012 | stbiw__sbpush(out, STBIW_UCHAR(s2 >> 8)); 1013 | stbiw__sbpush(out, STBIW_UCHAR(s2)); 1014 | stbiw__sbpush(out, STBIW_UCHAR(s1 >> 8)); 1015 | stbiw__sbpush(out, STBIW_UCHAR(s1)); 1016 | } 1017 | *out_len = stbiw__sbn(out); 1018 | // make returned pointer freeable 1019 | STBIW_MEMMOVE(stbiw__sbraw(out), out, *out_len); 1020 | return (unsigned char *) stbiw__sbraw(out); 1021 | #endif // STBIW_ZLIB_COMPRESS 1022 | } 1023 | 1024 | static unsigned int stbiw__crc32(unsigned char *buffer, int len) 1025 | { 1026 | #ifdef STBIW_CRC32 1027 | return STBIW_CRC32(buffer, len); 1028 | #else 1029 | static unsigned int crc_table[256] = 1030 | { 1031 | 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 1032 | 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 1033 | 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 1034 | 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 1035 | 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 1036 | 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 1037 | 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 1038 | 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 1039 | 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 1040 | 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 1041 | 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 1042 | 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 1043 | 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 1044 | 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 1045 | 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 1046 | 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 1047 | 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 1048 | 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 1049 | 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 1050 | 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 1051 | 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 1052 | 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 1053 | 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 1054 | 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 1055 | 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 1056 | 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 1057 | 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 1058 | 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 1059 | 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 1060 | 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 1061 | 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 1062 | 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D 1063 | }; 1064 | 1065 | unsigned int crc = ~0u; 1066 | int i; 1067 | for (i=0; i < len; ++i) 1068 | crc = (crc >> 8) ^ crc_table[buffer[i] ^ (crc & 0xff)]; 1069 | return ~crc; 1070 | #endif 1071 | } 1072 | 1073 | #define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) 1074 | #define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); 1075 | #define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) 1076 | 1077 | static void stbiw__wpcrc(unsigned char **data, int len) 1078 | { 1079 | unsigned int crc = stbiw__crc32(*data - len - 4, len+4); 1080 | stbiw__wp32(*data, crc); 1081 | } 1082 | 1083 | static unsigned char stbiw__paeth(int a, int b, int c) 1084 | { 1085 | int p = a + b - c, pa = abs(p-a), pb = abs(p-b), pc = abs(p-c); 1086 | if (pa <= pb && pa <= pc) return STBIW_UCHAR(a); 1087 | if (pb <= pc) return STBIW_UCHAR(b); 1088 | return STBIW_UCHAR(c); 1089 | } 1090 | 1091 | // @OPTIMIZE: provide an option that always forces left-predict or paeth predict 1092 | static void stbiw__encode_png_line(unsigned char *pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char *line_buffer) 1093 | { 1094 | static int mapping[] = { 0,1,2,3,4 }; 1095 | static int firstmap[] = { 0,1,0,5,6 }; 1096 | int *mymap = (y != 0) ? mapping : firstmap; 1097 | int i; 1098 | int type = mymap[filter_type]; 1099 | unsigned char *z = pixels + stride_bytes * (stbi__flip_vertically_on_write ? height-1-y : y); 1100 | int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; 1101 | 1102 | if (type==0) { 1103 | memcpy(line_buffer, z, width*n); 1104 | return; 1105 | } 1106 | 1107 | // first loop isn't optimized since it's just one pixel 1108 | for (i = 0; i < n; ++i) { 1109 | switch (type) { 1110 | case 1: line_buffer[i] = z[i]; break; 1111 | case 2: line_buffer[i] = z[i] - z[i-signed_stride]; break; 1112 | case 3: line_buffer[i] = z[i] - (z[i-signed_stride]>>1); break; 1113 | case 4: line_buffer[i] = (signed char) (z[i] - stbiw__paeth(0,z[i-signed_stride],0)); break; 1114 | case 5: line_buffer[i] = z[i]; break; 1115 | case 6: line_buffer[i] = z[i]; break; 1116 | } 1117 | } 1118 | switch (type) { 1119 | case 1: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-n]; break; 1120 | case 2: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - z[i-signed_stride]; break; 1121 | case 3: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - ((z[i-n] + z[i-signed_stride])>>1); break; 1122 | case 4: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], z[i-signed_stride], z[i-signed_stride-n]); break; 1123 | case 5: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - (z[i-n]>>1); break; 1124 | case 6: for (i=n; i < width*n; ++i) line_buffer[i] = z[i] - stbiw__paeth(z[i-n], 0,0); break; 1125 | } 1126 | } 1127 | 1128 | STBIWDEF unsigned char *stbi_write_png_to_mem(const unsigned char *pixels, int stride_bytes, int x, int y, int n, int *out_len) 1129 | { 1130 | int force_filter = stbi_write_force_png_filter; 1131 | int ctype[5] = { -1, 0, 4, 2, 6 }; 1132 | unsigned char sig[8] = { 137,80,78,71,13,10,26,10 }; 1133 | unsigned char *out,*o, *filt, *zlib; 1134 | signed char *line_buffer; 1135 | int j,zlen; 1136 | 1137 | if (stride_bytes == 0) 1138 | stride_bytes = x * n; 1139 | 1140 | if (force_filter >= 5) { 1141 | force_filter = -1; 1142 | } 1143 | 1144 | filt = (unsigned char *) STBIW_MALLOC((x*n+1) * y); if (!filt) return 0; 1145 | line_buffer = (signed char *) STBIW_MALLOC(x * n); if (!line_buffer) { STBIW_FREE(filt); return 0; } 1146 | for (j=0; j < y; ++j) { 1147 | int filter_type; 1148 | if (force_filter > -1) { 1149 | filter_type = force_filter; 1150 | stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, force_filter, line_buffer); 1151 | } else { // Estimate the best filter by running through all of them: 1152 | int best_filter = 0, best_filter_val = 0x7fffffff, est, i; 1153 | for (filter_type = 0; filter_type < 5; filter_type++) { 1154 | stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, filter_type, line_buffer); 1155 | 1156 | // Estimate the entropy of the line using this filter; the less, the better. 1157 | est = 0; 1158 | for (i = 0; i < x*n; ++i) { 1159 | est += abs((signed char) line_buffer[i]); 1160 | } 1161 | if (est < best_filter_val) { 1162 | best_filter_val = est; 1163 | best_filter = filter_type; 1164 | } 1165 | } 1166 | if (filter_type != best_filter) { // If the last iteration already got us the best filter, don't redo it 1167 | stbiw__encode_png_line((unsigned char*)(pixels), stride_bytes, x, y, j, n, best_filter, line_buffer); 1168 | filter_type = best_filter; 1169 | } 1170 | } 1171 | // when we get here, filter_type contains the filter type, and line_buffer contains the data 1172 | filt[j*(x*n+1)] = (unsigned char) filter_type; 1173 | STBIW_MEMMOVE(filt+j*(x*n+1)+1, line_buffer, x*n); 1174 | } 1175 | STBIW_FREE(line_buffer); 1176 | zlib = stbi_zlib_compress(filt, y*( x*n+1), &zlen, stbi_write_png_compression_level); 1177 | STBIW_FREE(filt); 1178 | if (!zlib) return 0; 1179 | 1180 | // each tag requires 12 bytes of overhead 1181 | out = (unsigned char *) STBIW_MALLOC(8 + 12+13 + 12+zlen + 12); 1182 | if (!out) return 0; 1183 | *out_len = 8 + 12+13 + 12+zlen + 12; 1184 | 1185 | o=out; 1186 | STBIW_MEMMOVE(o,sig,8); o+= 8; 1187 | stbiw__wp32(o, 13); // header length 1188 | stbiw__wptag(o, "IHDR"); 1189 | stbiw__wp32(o, x); 1190 | stbiw__wp32(o, y); 1191 | *o++ = 8; 1192 | *o++ = STBIW_UCHAR(ctype[n]); 1193 | *o++ = 0; 1194 | *o++ = 0; 1195 | *o++ = 0; 1196 | stbiw__wpcrc(&o,13); 1197 | 1198 | stbiw__wp32(o, zlen); 1199 | stbiw__wptag(o, "IDAT"); 1200 | STBIW_MEMMOVE(o, zlib, zlen); 1201 | o += zlen; 1202 | STBIW_FREE(zlib); 1203 | stbiw__wpcrc(&o, zlen); 1204 | 1205 | stbiw__wp32(o,0); 1206 | stbiw__wptag(o, "IEND"); 1207 | stbiw__wpcrc(&o,0); 1208 | 1209 | STBIW_ASSERT(o == out + *out_len); 1210 | 1211 | return out; 1212 | } 1213 | 1214 | #ifndef STBI_WRITE_NO_STDIO 1215 | STBIWDEF int stbi_write_png(char const *filename, int x, int y, int comp, const void *data, int stride_bytes) 1216 | { 1217 | FILE *f; 1218 | int len; 1219 | unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); 1220 | if (png == NULL) return 0; 1221 | 1222 | f = stbiw__fopen(filename, "wb"); 1223 | if (!f) { STBIW_FREE(png); return 0; } 1224 | fwrite(png, 1, len, f); 1225 | fclose(f); 1226 | STBIW_FREE(png); 1227 | return 1; 1228 | } 1229 | #endif 1230 | 1231 | STBIWDEF int stbi_write_png_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int stride_bytes) 1232 | { 1233 | int len; 1234 | unsigned char *png = stbi_write_png_to_mem((const unsigned char *) data, stride_bytes, x, y, comp, &len); 1235 | if (png == NULL) return 0; 1236 | func(context, png, len); 1237 | STBIW_FREE(png); 1238 | return 1; 1239 | } 1240 | 1241 | 1242 | /* *************************************************************************** 1243 | * 1244 | * JPEG writer 1245 | * 1246 | * This is based on Jon Olick's jo_jpeg.cpp: 1247 | * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html 1248 | */ 1249 | 1250 | static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, 1251 | 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; 1252 | 1253 | static void stbiw__jpg_writeBits(stbi__write_context *s, int *bitBufP, int *bitCntP, const unsigned short *bs) { 1254 | int bitBuf = *bitBufP, bitCnt = *bitCntP; 1255 | bitCnt += bs[1]; 1256 | bitBuf |= bs[0] << (24 - bitCnt); 1257 | while(bitCnt >= 8) { 1258 | unsigned char c = (bitBuf >> 16) & 255; 1259 | stbiw__putc(s, c); 1260 | if(c == 255) { 1261 | stbiw__putc(s, 0); 1262 | } 1263 | bitBuf <<= 8; 1264 | bitCnt -= 8; 1265 | } 1266 | *bitBufP = bitBuf; 1267 | *bitCntP = bitCnt; 1268 | } 1269 | 1270 | static void stbiw__jpg_DCT(float *d0p, float *d1p, float *d2p, float *d3p, float *d4p, float *d5p, float *d6p, float *d7p) { 1271 | float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; 1272 | float z1, z2, z3, z4, z5, z11, z13; 1273 | 1274 | float tmp0 = d0 + d7; 1275 | float tmp7 = d0 - d7; 1276 | float tmp1 = d1 + d6; 1277 | float tmp6 = d1 - d6; 1278 | float tmp2 = d2 + d5; 1279 | float tmp5 = d2 - d5; 1280 | float tmp3 = d3 + d4; 1281 | float tmp4 = d3 - d4; 1282 | 1283 | // Even part 1284 | float tmp10 = tmp0 + tmp3; // phase 2 1285 | float tmp13 = tmp0 - tmp3; 1286 | float tmp11 = tmp1 + tmp2; 1287 | float tmp12 = tmp1 - tmp2; 1288 | 1289 | d0 = tmp10 + tmp11; // phase 3 1290 | d4 = tmp10 - tmp11; 1291 | 1292 | z1 = (tmp12 + tmp13) * 0.707106781f; // c4 1293 | d2 = tmp13 + z1; // phase 5 1294 | d6 = tmp13 - z1; 1295 | 1296 | // Odd part 1297 | tmp10 = tmp4 + tmp5; // phase 2 1298 | tmp11 = tmp5 + tmp6; 1299 | tmp12 = tmp6 + tmp7; 1300 | 1301 | // The rotator is modified from fig 4-8 to avoid extra negations. 1302 | z5 = (tmp10 - tmp12) * 0.382683433f; // c6 1303 | z2 = tmp10 * 0.541196100f + z5; // c2-c6 1304 | z4 = tmp12 * 1.306562965f + z5; // c2+c6 1305 | z3 = tmp11 * 0.707106781f; // c4 1306 | 1307 | z11 = tmp7 + z3; // phase 5 1308 | z13 = tmp7 - z3; 1309 | 1310 | *d5p = z13 + z2; // phase 6 1311 | *d3p = z13 - z2; 1312 | *d1p = z11 + z4; 1313 | *d7p = z11 - z4; 1314 | 1315 | *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; 1316 | } 1317 | 1318 | static void stbiw__jpg_calcBits(int val, unsigned short bits[2]) { 1319 | int tmp1 = val < 0 ? -val : val; 1320 | val = val < 0 ? val-1 : val; 1321 | bits[1] = 1; 1322 | while(tmp1 >>= 1) { 1323 | ++bits[1]; 1324 | } 1325 | bits[0] = val & ((1<0)&&(DU[end0pos]==0); --end0pos) { 1368 | } 1369 | // end0pos = first element in reverse order !=0 1370 | if(end0pos == 0) { 1371 | stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); 1372 | return DU[0]; 1373 | } 1374 | for(i = 1; i <= end0pos; ++i) { 1375 | int startpos = i; 1376 | int nrzeroes; 1377 | unsigned short bits[2]; 1378 | for (; DU[i]==0 && i<=end0pos; ++i) { 1379 | } 1380 | nrzeroes = i-startpos; 1381 | if ( nrzeroes >= 16 ) { 1382 | int lng = nrzeroes>>4; 1383 | int nrmarker; 1384 | for (nrmarker=1; nrmarker <= lng; ++nrmarker) 1385 | stbiw__jpg_writeBits(s, bitBuf, bitCnt, M16zeroes); 1386 | nrzeroes &= 15; 1387 | } 1388 | stbiw__jpg_calcBits(DU[i], bits); 1389 | stbiw__jpg_writeBits(s, bitBuf, bitCnt, HTAC[(nrzeroes<<4)+bits[1]]); 1390 | stbiw__jpg_writeBits(s, bitBuf, bitCnt, bits); 1391 | } 1392 | if(end0pos != 63) { 1393 | stbiw__jpg_writeBits(s, bitBuf, bitCnt, EOB); 1394 | } 1395 | return DU[0]; 1396 | } 1397 | 1398 | static int stbi_write_jpg_core(stbi__write_context *s, int width, int height, int comp, const void* data, int quality) { 1399 | // Constants that don't pollute global namespace 1400 | static const unsigned char std_dc_luminance_nrcodes[] = {0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0}; 1401 | static const unsigned char std_dc_luminance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; 1402 | static const unsigned char std_ac_luminance_nrcodes[] = {0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d}; 1403 | static const unsigned char std_ac_luminance_values[] = { 1404 | 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, 1405 | 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, 1406 | 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, 1407 | 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, 1408 | 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, 1409 | 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, 1410 | 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa 1411 | }; 1412 | static const unsigned char std_dc_chrominance_nrcodes[] = {0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0}; 1413 | static const unsigned char std_dc_chrominance_values[] = {0,1,2,3,4,5,6,7,8,9,10,11}; 1414 | static const unsigned char std_ac_chrominance_nrcodes[] = {0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77}; 1415 | static const unsigned char std_ac_chrominance_values[] = { 1416 | 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, 1417 | 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, 1418 | 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, 1419 | 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, 1420 | 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, 1421 | 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, 1422 | 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa 1423 | }; 1424 | // Huffman tables 1425 | static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9}}; 1426 | static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11}}; 1427 | static const unsigned short YAC_HT[256][2] = { 1428 | {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1429 | {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1430 | {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1431 | {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1432 | {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1433 | {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1434 | {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1435 | {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1436 | {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1437 | {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1438 | {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1439 | {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1440 | {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1441 | {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1442 | {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, 1443 | {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} 1444 | }; 1445 | static const unsigned short UVAC_HT[256][2] = { 1446 | {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1447 | {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1448 | {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1449 | {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1450 | {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1451 | {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1452 | {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1453 | {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1454 | {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1455 | {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1456 | {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1457 | {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1458 | {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1459 | {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, 1460 | {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, 1461 | {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} 1462 | }; 1463 | static const int YQT[] = {16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, 1464 | 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99}; 1465 | static const int UVQT[] = {17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, 1466 | 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99}; 1467 | static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, 1468 | 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; 1469 | 1470 | int row, col, i, k, subsample; 1471 | float fdtbl_Y[64], fdtbl_UV[64]; 1472 | unsigned char YTable[64], UVTable[64]; 1473 | 1474 | if(!data || !width || !height || comp > 4 || comp < 1) { 1475 | return 0; 1476 | } 1477 | 1478 | quality = quality ? quality : 90; 1479 | subsample = quality <= 90 ? 1 : 0; 1480 | quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; 1481 | quality = quality < 50 ? 5000 / quality : 200 - quality * 2; 1482 | 1483 | for(i = 0; i < 64; ++i) { 1484 | int uvti, yti = (YQT[i]*quality+50)/100; 1485 | YTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (yti < 1 ? 1 : yti > 255 ? 255 : yti); 1486 | uvti = (UVQT[i]*quality+50)/100; 1487 | UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char) (uvti < 1 ? 1 : uvti > 255 ? 255 : uvti); 1488 | } 1489 | 1490 | for(row = 0, k = 0; row < 8; ++row) { 1491 | for(col = 0; col < 8; ++col, ++k) { 1492 | fdtbl_Y[k] = 1 / (YTable [stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); 1493 | fdtbl_UV[k] = 1 / (UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col]); 1494 | } 1495 | } 1496 | 1497 | // Write Headers 1498 | { 1499 | static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; 1500 | static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; 1501 | const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)(height>>8),STBIW_UCHAR(height),(unsigned char)(width>>8),STBIW_UCHAR(width), 1502 | 3,1,(unsigned char)(subsample?0x22:0x11),0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; 1503 | s->func(s->context, (void*)head0, sizeof(head0)); 1504 | s->func(s->context, (void*)YTable, sizeof(YTable)); 1505 | stbiw__putc(s, 1); 1506 | s->func(s->context, UVTable, sizeof(UVTable)); 1507 | s->func(s->context, (void*)head1, sizeof(head1)); 1508 | s->func(s->context, (void*)(std_dc_luminance_nrcodes+1), sizeof(std_dc_luminance_nrcodes)-1); 1509 | s->func(s->context, (void*)std_dc_luminance_values, sizeof(std_dc_luminance_values)); 1510 | stbiw__putc(s, 0x10); // HTYACinfo 1511 | s->func(s->context, (void*)(std_ac_luminance_nrcodes+1), sizeof(std_ac_luminance_nrcodes)-1); 1512 | s->func(s->context, (void*)std_ac_luminance_values, sizeof(std_ac_luminance_values)); 1513 | stbiw__putc(s, 1); // HTUDCinfo 1514 | s->func(s->context, (void*)(std_dc_chrominance_nrcodes+1), sizeof(std_dc_chrominance_nrcodes)-1); 1515 | s->func(s->context, (void*)std_dc_chrominance_values, sizeof(std_dc_chrominance_values)); 1516 | stbiw__putc(s, 0x11); // HTUACinfo 1517 | s->func(s->context, (void*)(std_ac_chrominance_nrcodes+1), sizeof(std_ac_chrominance_nrcodes)-1); 1518 | s->func(s->context, (void*)std_ac_chrominance_values, sizeof(std_ac_chrominance_values)); 1519 | s->func(s->context, (void*)head2, sizeof(head2)); 1520 | } 1521 | 1522 | // Encode 8x8 macroblocks 1523 | { 1524 | static const unsigned short fillBits[] = {0x7F, 7}; 1525 | int DCY=0, DCU=0, DCV=0; 1526 | int bitBuf=0, bitCnt=0; 1527 | // comp == 2 is grey+alpha (alpha is ignored) 1528 | int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; 1529 | const unsigned char *dataR = (const unsigned char *)data; 1530 | const unsigned char *dataG = dataR + ofsG; 1531 | const unsigned char *dataB = dataR + ofsB; 1532 | int x, y, pos; 1533 | if(subsample) { 1534 | for(y = 0; y < height; y += 16) { 1535 | for(x = 0; x < width; x += 16) { 1536 | float Y[256], U[256], V[256]; 1537 | for(row = y, pos = 0; row < y+16; ++row) { 1538 | // row >= height => use last input row 1539 | int clamped_row = (row < height) ? row : height - 1; 1540 | int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; 1541 | for(col = x; col < x+16; ++col, ++pos) { 1542 | // if col >= width => use pixel from last input column 1543 | int p = base_p + ((col < width) ? col : (width-1))*comp; 1544 | float r = dataR[p], g = dataG[p], b = dataB[p]; 1545 | Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128; 1546 | U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b; 1547 | V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b; 1548 | } 1549 | } 1550 | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+0, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); 1551 | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+8, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); 1552 | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+128, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); 1553 | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y+136, 16, fdtbl_Y, DCY, YDC_HT, YAC_HT); 1554 | 1555 | // subsample U,V 1556 | { 1557 | float subU[64], subV[64]; 1558 | int yy, xx; 1559 | for(yy = 0, pos = 0; yy < 8; ++yy) { 1560 | for(xx = 0; xx < 8; ++xx, ++pos) { 1561 | int j = yy*32+xx*2; 1562 | subU[pos] = (U[j+0] + U[j+1] + U[j+16] + U[j+17]) * 0.25f; 1563 | subV[pos] = (V[j+0] + V[j+1] + V[j+16] + V[j+17]) * 0.25f; 1564 | } 1565 | } 1566 | DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subU, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); 1567 | DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, subV, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); 1568 | } 1569 | } 1570 | } 1571 | } else { 1572 | for(y = 0; y < height; y += 8) { 1573 | for(x = 0; x < width; x += 8) { 1574 | float Y[64], U[64], V[64]; 1575 | for(row = y, pos = 0; row < y+8; ++row) { 1576 | // row >= height => use last input row 1577 | int clamped_row = (row < height) ? row : height - 1; 1578 | int base_p = (stbi__flip_vertically_on_write ? (height-1-clamped_row) : clamped_row)*width*comp; 1579 | for(col = x; col < x+8; ++col, ++pos) { 1580 | // if col >= width => use pixel from last input column 1581 | int p = base_p + ((col < width) ? col : (width-1))*comp; 1582 | float r = dataR[p], g = dataG[p], b = dataB[p]; 1583 | Y[pos]= +0.29900f*r + 0.58700f*g + 0.11400f*b - 128; 1584 | U[pos]= -0.16874f*r - 0.33126f*g + 0.50000f*b; 1585 | V[pos]= +0.50000f*r - 0.41869f*g - 0.08131f*b; 1586 | } 1587 | } 1588 | 1589 | DCY = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, Y, 8, fdtbl_Y, DCY, YDC_HT, YAC_HT); 1590 | DCU = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, U, 8, fdtbl_UV, DCU, UVDC_HT, UVAC_HT); 1591 | DCV = stbiw__jpg_processDU(s, &bitBuf, &bitCnt, V, 8, fdtbl_UV, DCV, UVDC_HT, UVAC_HT); 1592 | } 1593 | } 1594 | } 1595 | 1596 | // Do the bit alignment of the EOI marker 1597 | stbiw__jpg_writeBits(s, &bitBuf, &bitCnt, fillBits); 1598 | } 1599 | 1600 | // EOI 1601 | stbiw__putc(s, 0xFF); 1602 | stbiw__putc(s, 0xD9); 1603 | 1604 | return 1; 1605 | } 1606 | 1607 | STBIWDEF int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality) 1608 | { 1609 | stbi__write_context s = { 0 }; 1610 | stbi__start_write_callbacks(&s, func, context); 1611 | return stbi_write_jpg_core(&s, x, y, comp, (void *) data, quality); 1612 | } 1613 | 1614 | 1615 | #ifndef STBI_WRITE_NO_STDIO 1616 | STBIWDEF int stbi_write_jpg(char const *filename, int x, int y, int comp, const void *data, int quality) 1617 | { 1618 | stbi__write_context s = { 0 }; 1619 | if (stbi__start_write_file(&s,filename)) { 1620 | int r = stbi_write_jpg_core(&s, x, y, comp, data, quality); 1621 | stbi__end_write_file(&s); 1622 | return r; 1623 | } else 1624 | return 0; 1625 | } 1626 | #endif 1627 | 1628 | #endif // STB_IMAGE_WRITE_IMPLEMENTATION 1629 | 1630 | /* Revision history 1631 | 1.16 (2021-07-11) 1632 | make Deflate code emit uncompressed blocks when it would otherwise expand 1633 | support writing BMPs with alpha channel 1634 | 1.15 (2020-07-13) unknown 1635 | 1.14 (2020-02-02) updated JPEG writer to downsample chroma channels 1636 | 1.13 1637 | 1.12 1638 | 1.11 (2019-08-11) 1639 | 1640 | 1.10 (2019-02-07) 1641 | support utf8 filenames in Windows; fix warnings and platform ifdefs 1642 | 1.09 (2018-02-11) 1643 | fix typo in zlib quality API, improve STB_I_W_STATIC in C++ 1644 | 1.08 (2018-01-29) 1645 | add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter 1646 | 1.07 (2017-07-24) 1647 | doc fix 1648 | 1.06 (2017-07-23) 1649 | writing JPEG (using Jon Olick's code) 1650 | 1.05 ??? 1651 | 1.04 (2017-03-03) 1652 | monochrome BMP expansion 1653 | 1.03 ??? 1654 | 1.02 (2016-04-02) 1655 | avoid allocating large structures on the stack 1656 | 1.01 (2016-01-16) 1657 | STBIW_REALLOC_SIZED: support allocators with no realloc support 1658 | avoid race-condition in crc initialization 1659 | minor compile issues 1660 | 1.00 (2015-09-14) 1661 | installable file IO function 1662 | 0.99 (2015-09-13) 1663 | warning fixes; TGA rle support 1664 | 0.98 (2015-04-08) 1665 | added STBIW_MALLOC, STBIW_ASSERT etc 1666 | 0.97 (2015-01-18) 1667 | fixed HDR asserts, rewrote HDR rle logic 1668 | 0.96 (2015-01-17) 1669 | add HDR output 1670 | fix monochrome BMP 1671 | 0.95 (2014-08-17) 1672 | add monochrome TGA output 1673 | 0.94 (2014-05-31) 1674 | rename private functions to avoid conflicts with stb_image.h 1675 | 0.93 (2014-05-27) 1676 | warning fixes 1677 | 0.92 (2010-08-01) 1678 | casts to unsigned char to fix warnings 1679 | 0.91 (2010-07-17) 1680 | first public release 1681 | 0.90 first internal release 1682 | */ 1683 | 1684 | /* 1685 | ------------------------------------------------------------------------------ 1686 | This software is available under 2 licenses -- choose whichever you prefer. 1687 | ------------------------------------------------------------------------------ 1688 | ALTERNATIVE A - MIT License 1689 | Copyright (c) 2017 Sean Barrett 1690 | Permission is hereby granted, free of charge, to any person obtaining a copy of 1691 | this software and associated documentation files (the "Software"), to deal in 1692 | the Software without restriction, including without limitation the rights to 1693 | use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 1694 | of the Software, and to permit persons to whom the Software is furnished to do 1695 | so, subject to the following conditions: 1696 | The above copyright notice and this permission notice shall be included in all 1697 | copies or substantial portions of the Software. 1698 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1699 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1700 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 1701 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 1702 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 1703 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 1704 | SOFTWARE. 1705 | ------------------------------------------------------------------------------ 1706 | ALTERNATIVE B - Public Domain (www.unlicense.org) 1707 | This is free and unencumbered software released into the public domain. 1708 | Anyone is free to copy, modify, publish, use, compile, sell, or distribute this 1709 | software, either in source code form or as a compiled binary, for any purpose, 1710 | commercial or non-commercial, and by any means. 1711 | In jurisdictions that recognize copyright laws, the author or authors of this 1712 | software dedicate any and all copyright interest in the software to the public 1713 | domain. We make this dedication for the benefit of the public at large and to 1714 | the detriment of our heirs and successors. We intend this dedication to be an 1715 | overt act of relinquishment in perpetuity of all present and future rights to 1716 | this software under copyright law. 1717 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1718 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1719 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 1720 | AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 1721 | ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 1722 | WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 1723 | ------------------------------------------------------------------------------ 1724 | */ 1725 | -------------------------------------------------------------------------------- /examples/example_stbi/turtle.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/examples/example_stbi/turtle.png -------------------------------------------------------------------------------- /examples/example_template/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - { template } 4 | 5 |
6 | 7 | - Example submited by: [@YourName](https://github.com/{YourName}) 8 | 9 | - Compilation command (on linux): 10 | ```console 11 | $ cc main.c -o example.out -lm 12 | $ ./example.out 13 | ``` 14 | 15 | - Compilation command (on windows): 16 | ```console 17 | $ cc main.c -o example.exe -lm 18 | $ ./example.exe 19 | ``` 20 | 21 | - Compilation command (on macOS): 22 | ```console 23 | $ cc main.c -o example.out -lm 24 | $ ./example.out 25 | ``` -------------------------------------------------------------------------------- /examples/example_template/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command (on linux): 2 | // cc main.c -o example.out -lm 3 | // 4 | // Compilation command (on windows): 5 | // cc main.c -o example.exe -lm 6 | // 7 | // Compilation command (on macOS): 8 | // cc main.c -o example.out -lm 9 | 10 | #include "your_backend_of_choosing.h" 11 | 12 | #define SILK_PIXELBUFFER_WIDTH 800 13 | #define SILK_PIXELBUFFER_HEIGHT 600 14 | 15 | #define SILK_IMPLEMENTATION 16 | #include "../../silk.h" 17 | 18 | i32 main(i32 argc, const string argv[]) { 19 | // Setting-up the main pixel-buffer 20 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT] = { 0 }; 21 | 22 | // Set-up your back-end here ... 23 | 24 | while(true) { 25 | // Clearing the pixel-buffer to white (0xffffffff -> #FFFFFFFF -> WHITE) 26 | silkClearPixelBufferColor(buffer, 0xffffffff); 27 | 28 | // Draw the red rectangle at the position in the middle of the pixel-buffer 29 | silkDrawRect( 30 | buffer, // pixel-buffer 31 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, // pixel-buffer size 32 | SILK_PIXELBUFFER_WIDTH, // pixel-buffer stride 33 | (vec2i) { SILK_PIXELBUFFER_CENTER_X, SILK_PIXELBUFFER_CENTER_Y }, // The position where we want to draw our red rectangle 34 | (vec2i) { 64, 64 }, // The size of our red rectangle 35 | 0xff0000ff // The color of our rectangle (0xff0000ff -> #FF0000FF -> RED) 36 | ); 37 | 38 | // ... Blit your graphics using your back-end ... 39 | } 40 | 41 | // ... close your back-end here 42 | 43 | return 0; 44 | } -------------------------------------------------------------------------------- /examples/example_win32/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - Win32 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | - Compilation command (on windows): 10 | ```console 11 | $ cc main.c -o example -municode -lgdi32 12 | $ ./example.exe 13 | ``` 14 | - Compilation command (on linux): 15 | ```console 16 | $ x86_64-w64-mingw32-gcc main.c -o example -municode -lgdi32 17 | $ wine example.exe 18 | ``` 19 | -------------------------------------------------------------------------------- /examples/example_win32/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command (on Windows) 2 | // cc main.c -o example -municode -lgdi32 3 | 4 | // Compilation command (on linux) 5 | // x86_64-w64-mingw32-gcc main.c -o example -municode -lgdi32 6 | 7 | #if !defined (UNICODE) 8 | #define UNICODE 9 | #endif // UNICODE 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | #define SILK_IMPLEMENTATION 17 | #include "../../silk.h" 18 | 19 | // NOTE(yakub): For some reason pixel buffer must be statically / globaly declared; otherwise the program won't even launch... 20 | static pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT] = { 0 }; 21 | static bool win32_close_window = false; 22 | static vec2i win32_window_size = { 0 }; 23 | 24 | LRESULT Win32WindowProcedures(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { 25 | switch (uMsg) { 26 | case WM_SIZE: { 27 | RECT win32_window_rect = { 0 }; 28 | GetClientRect(hwnd, &win32_window_rect); 29 | 30 | win32_window_size = (vec2i) { 31 | .x = win32_window_rect.right - win32_window_rect.left, 32 | .y = win32_window_rect.bottom - win32_window_rect.top 33 | }; 34 | } break; 35 | 36 | case WM_CLOSE: { 37 | win32_close_window = true; 38 | PostQuitMessage(0); 39 | } break; 40 | 41 | case WM_DESTROY: { 42 | win32_close_window = true; 43 | PostQuitMessage(0); 44 | } break; 45 | } 46 | 47 | return DefWindowProc( 48 | hwnd, 49 | uMsg, 50 | wParam, 51 | lParam 52 | ); 53 | }; 54 | 55 | i32 Win32CreateWindow(HINSTANCE hInstance, i32 nCmdShow, HWND* window) { 56 | if(window == NULL) { 57 | silkLogErr("WIN32: Passed a NULL parameter: window."); 58 | 59 | return SILK_FAILURE; 60 | } 61 | 62 | const wchar_t win32_window_class_name[] = L"SilkWin32Example"; 63 | 64 | WNDCLASS win32_window_class = { 65 | .lpszClassName = win32_window_class_name, 66 | .lpfnWndProc = Win32WindowProcedures, 67 | .hInstance = hInstance 68 | }; 69 | 70 | RegisterClass(&win32_window_class); 71 | 72 | silkLogInfo("WIN32: Registered window class: %ls", win32_window_class_name); 73 | 74 | *window = CreateWindowEx( 75 | 0, 76 | win32_window_class_name, 77 | L"Silk 1.0 - Win32 Example", 78 | WS_OVERLAPPEDWINDOW, 79 | CW_USEDEFAULT, 80 | CW_USEDEFAULT, 81 | 800, 82 | 600, 83 | NULL, 84 | NULL, 85 | hInstance, 86 | NULL 87 | ); 88 | 89 | if(window == NULL) { 90 | silkLogErr("WIN32: Unable to create a Win32 window."); 91 | 92 | return SILK_FAILURE; 93 | } 94 | 95 | ShowWindow(*window, nCmdShow); 96 | 97 | silkLogInfo("WIN32: Window created successfully."); 98 | 99 | return SILK_SUCCESS; 100 | }; 101 | 102 | i32 Win32DispatchEvents(HWND* window, MSG* messages) { 103 | if(window == NULL) { 104 | silkLogErr("WIN32: Passed a NULL parameter: window."); 105 | 106 | return SILK_FAILURE; 107 | } 108 | 109 | if(messages == NULL) { 110 | silkLogErr("WIN32: Passed a NULL parameter: messages."); 111 | 112 | return SILK_FAILURE; 113 | } 114 | 115 | while(PeekMessageA(messages, *window, 0, 0, PM_REMOVE)) { 116 | TranslateMessage(messages); 117 | DispatchMessage(messages); 118 | } 119 | 120 | return SILK_SUCCESS; 121 | }; 122 | 123 | i32 Win32Blit(HWND* window) { 124 | if(window == NULL) { 125 | silkLogErr("WIN32: Passed a NULL parameter: window."); 126 | 127 | return SILK_FAILURE; 128 | } 129 | 130 | BITMAPINFO win32_bitmap_info = { 131 | .bmiHeader.biSize = sizeof(win32_bitmap_info.bmiHeader), 132 | .bmiHeader.biWidth = SILK_PIXELBUFFER_WIDTH, 133 | .bmiHeader.biHeight = -SILK_PIXELBUFFER_HEIGHT, 134 | .bmiHeader.biBitCount = 32, 135 | .bmiHeader.biPlanes = 1, 136 | .bmiHeader.biCompression = BI_RGB 137 | }; 138 | 139 | HDC win32_device_context = GetDC(*window); 140 | 141 | StretchDIBits( 142 | win32_device_context, 143 | 0, 0, win32_window_size.x, win32_window_size.y, 144 | 0, 0, win32_window_size.x, win32_window_size.y, 145 | buffer, 146 | &win32_bitmap_info, 147 | DIB_RGB_COLORS, 148 | SRCCOPY 149 | ); 150 | 151 | ReleaseDC(*window, win32_device_context); 152 | 153 | 154 | return SILK_SUCCESS; 155 | }; 156 | 157 | i32 WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, i32 nCmdShow) { 158 | i32 rotation = 0; 159 | 160 | const string text = "Hello, Win32!"; 161 | const i32 text_size = 4; 162 | const i32 text_spacing = 1; 163 | 164 | // Win32 components 165 | HWND win32_window; 166 | MSG win32_event_messages; 167 | 168 | // Setting-up Win32 169 | Win32CreateWindow(hInstance, nCmdShow, &win32_window); 170 | 171 | // Update-Render loop 172 | while(!win32_close_window) { 173 | // Dispatching Win32 events 174 | Win32DispatchEvents(&win32_window, &win32_event_messages); 175 | 176 | // Clearing the silk's pixel buffer 177 | silkClearPixelBufferColorRegion(buffer, win32_window_size, SILK_PIXELBUFFER_WIDTH, 0xffffffff); 178 | 179 | silkDrawTriangleEquilateral( 180 | buffer, 181 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 182 | SILK_PIXELBUFFER_WIDTH, 183 | (vec2i) { 184 | win32_window_size.x / 2, 185 | win32_window_size.y / 2 186 | }, 187 | win32_window_size.y / 8, 188 | rotation++, 189 | 0xff0000ff 190 | ); 191 | 192 | silkDrawTextDefault( 193 | buffer, 194 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 195 | SILK_PIXELBUFFER_WIDTH, 196 | text, 197 | (vec2i) { 198 | win32_window_size.x / 2 - silkMeasureText(text, text_size, text_spacing).x / 2, 199 | win32_window_size.y / 2 - silkMeasureText(text, text_size, text_spacing).y / 2 + win32_window_size.y / 4 200 | }, 201 | text_size, 202 | text_spacing, 203 | 0xff000000 204 | ); 205 | 206 | // Displaying the graphics on the window 207 | Win32Blit(&win32_window); 208 | } 209 | 210 | return 0; 211 | } 212 | 213 | -------------------------------------------------------------------------------- /examples/example_x11/README.md: -------------------------------------------------------------------------------- 1 |
2 | 3 | # Silk example - X11 4 | 5 |
6 | 7 | - Example submited by: [@itsYakub](https://github.com/itsYakub) 8 | - Compilation command: 9 | ```console 10 | $ cc main.c -o example.out -lX11 11 | $ ./example.out 12 | ``` -------------------------------------------------------------------------------- /examples/example_x11/main.c: -------------------------------------------------------------------------------- 1 | // Compilation command: 2 | // cc main.c -o example.out -lX11 -lm 3 | 4 | #include 5 | #include 6 | #include 7 | #include // X11 Window Library / Protocol 8 | #include // Required for: 'bool quit;' 9 | 10 | #define SILK_IMPLEMENTATION 11 | #include "../../silk.h" 12 | 13 | i32 X11Setup(pixel* buf, Display** display, Window* root, Window* window, XWindowAttributes* attributes, GC* graphics_context, XImage** image, Atom* message_delete_window) { 14 | *display = XOpenDisplay(NULL); 15 | if(!*display) { 16 | silkLogErr("X11: Couldn't open the default display."); 17 | return SILK_FAILURE; 18 | } 19 | 20 | silkLogInfo("X11: Default display opened successfully."); 21 | 22 | *root = DefaultRootWindow(*display); 23 | if(*root == 0) { 24 | silkLogErr("X11: Couldn't open the default window root."); 25 | XCloseDisplay(*display); 26 | return SILK_FAILURE; 27 | } 28 | 29 | silkLogInfo("X11: Default root opened successfully."); 30 | 31 | *window = XCreateSimpleWindow( 32 | *display, 33 | *root, 34 | 0, 35 | 0, 36 | 800, 37 | 600, 38 | 0, 39 | 0, 40 | 0 41 | ); 42 | 43 | if(*window == 0) { 44 | silkLogErr("X11: Couldn't create an X11 Window."); 45 | XCloseDisplay(*display); 46 | return SILK_FAILURE; 47 | } 48 | 49 | silkLogInfo("X11: Window created successfully."); 50 | 51 | XStoreName( 52 | *display, 53 | *window, 54 | "Silk 1.0 - X11 Example" 55 | ); 56 | 57 | XGetWindowAttributes( 58 | *display, 59 | *window, 60 | attributes 61 | ); 62 | 63 | *image = XCreateImage( 64 | *display, 65 | attributes->visual, 66 | attributes->depth, 67 | ZPixmap, 68 | 0, 69 | (char*) buf, 70 | SILK_PIXELBUFFER_WIDTH, 71 | SILK_PIXELBUFFER_HEIGHT, 72 | 32, 73 | SILK_PIXELBUFFER_WIDTH * sizeof(pixel) 74 | ); 75 | 76 | *graphics_context = XCreateGC( 77 | *display, 78 | *window, 79 | 0, 80 | NULL 81 | ); 82 | 83 | if(*graphics_context == 0) { 84 | silkLogErr("X11: Couldn't create graphics context."); 85 | XCloseDisplay(*display); 86 | return SILK_FAILURE; 87 | } 88 | 89 | silkLogInfo("X11: Graphics context created successfully."); 90 | 91 | *message_delete_window = XInternAtom(*display, "WM_DELETE_WINDOW", False); 92 | XSetWMProtocols(*display, *window, message_delete_window, 1); 93 | 94 | silkLogInfo("X11: New window protocol: WM_DELETE_WINDOW."); 95 | 96 | XMapWindow(*display, *window); 97 | 98 | return SILK_SUCCESS; 99 | } 100 | 101 | i32 X11Blit(pixel* buffer, Display* display, Window* window, GC* graphics_context, XImage* image) { 102 | if(buffer == NULL) { 103 | silkLogErr("X11: Passed a NULL parameter: buffer."); 104 | 105 | return SILK_FAILURE; 106 | } if(display == NULL) { 107 | silkLogErr("X11: Passed a NULL parameter: display."); 108 | 109 | return SILK_FAILURE; 110 | } if(window == NULL) { 111 | silkLogErr("X11: Passed a NULL parameter: window."); 112 | 113 | return SILK_FAILURE; 114 | } if(graphics_context == NULL) { 115 | silkLogErr("X11: Passed a NULL parameter: graphics_context."); 116 | 117 | return SILK_FAILURE; 118 | } if(image == NULL) { 119 | silkLogErr("X11: Passed a NULL parameter: image."); 120 | 121 | return SILK_FAILURE; 122 | } 123 | 124 | XPutImage( 125 | display, 126 | *window, 127 | *graphics_context, 128 | image, 129 | 0, 130 | 0, 131 | 0, 132 | 0, 133 | SILK_PIXELBUFFER_WIDTH, 134 | SILK_PIXELBUFFER_HEIGHT 135 | ); 136 | 137 | return SILK_SUCCESS; 138 | } 139 | 140 | i32 X11Close(Display* display, XImage* image) { 141 | if(display == NULL) { 142 | silkLogErr("X11: Passed a NULL parameter: display."); 143 | 144 | return SILK_FAILURE; 145 | } if(image == NULL) { 146 | silkLogErr("X11: Passed a NULL parameter: image."); 147 | 148 | return SILK_FAILURE; 149 | } 150 | 151 | XCloseDisplay(display); 152 | 153 | return SILK_SUCCESS; 154 | } 155 | 156 | i32 main(i32 argc, const string argv[]) { 157 | pixel buffer[SILK_PIXELBUFFER_WIDTH * SILK_PIXELBUFFER_HEIGHT]; 158 | 159 | i32 rotation = 0; 160 | 161 | const string text = "Hello, X11!"; 162 | const i32 text_size = 4; 163 | const i32 text_spacing = 1; 164 | 165 | Display* x11_display = NULL; 166 | Window x11_root = 0; 167 | Window x11_window = 0; 168 | XWindowAttributes x11_window_attributes = { 0 }; 169 | XImage* x11_render_surface = NULL; 170 | GC x11_graphics_context = 0; 171 | Atom wm_delete_window = 0; 172 | 173 | X11Setup(buffer, &x11_display, &x11_root, &x11_window, &x11_window_attributes, &x11_graphics_context, &x11_render_surface, &wm_delete_window); 174 | 175 | bool quit = false; 176 | while(!quit) { 177 | while(XPending(x11_display) > 0) { 178 | XEvent x11_event = { 0 }; 179 | XNextEvent(x11_display, &x11_event); 180 | 181 | switch (x11_event.type) { 182 | case ClientMessage: { 183 | if(x11_event.xclient.data.l[0] == wm_delete_window) { 184 | quit = true; 185 | } 186 | } break; 187 | } 188 | } 189 | 190 | XGetWindowAttributes( 191 | x11_display, 192 | x11_window, 193 | &x11_window_attributes 194 | ); 195 | 196 | silkClearPixelBufferColorRegion(buffer, (vec2i) { x11_window_attributes.width, x11_window_attributes.height }, SILK_PIXELBUFFER_WIDTH, 0xffffffff); 197 | 198 | silkDrawPolygon( 199 | buffer, 200 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 201 | SILK_PIXELBUFFER_WIDTH, 202 | (vec2i) { 203 | x11_window_attributes.width / 2, 204 | x11_window_attributes.height / 2 205 | }, 206 | x11_window_attributes.height / 8, 207 | rotation++, 208 | 5, 209 | 0xffff0000 210 | ); 211 | 212 | silkDrawTextDefault( 213 | buffer, 214 | (vec2i) { SILK_PIXELBUFFER_WIDTH, SILK_PIXELBUFFER_HEIGHT }, 215 | SILK_PIXELBUFFER_WIDTH, 216 | text, 217 | (vec2i) { 218 | x11_window_attributes.width / 2 - silkMeasureText(text, text_size, text_spacing).x / 2, 219 | x11_window_attributes.height / 2 - silkMeasureText(text, text_size, text_spacing).y / 2 + x11_window_attributes.height / 4 220 | }, 221 | text_size, 222 | text_spacing, 223 | 0xff000000 224 | ); 225 | 226 | X11Blit(buffer, x11_display, &x11_window, &x11_graphics_context, x11_render_surface); 227 | } 228 | 229 | X11Close(x11_display, x11_render_surface); 230 | 231 | return 0; 232 | } -------------------------------------------------------------------------------- /res/images/silk_banner.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/itsYakub/Silk/c668fc73e3ab1f726de870fd2a6783788d232929/res/images/silk_banner.png -------------------------------------------------------------------------------- /res/images/silk_banner.svg: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | SilkSingle-header 2d graphics library 90 | -------------------------------------------------------------------------------- /res/images/silk_logo.svg: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 16 | 35 | 37 | 41 | 45 | 50 | 51 | 52 | --------------------------------------------------------------------------------