├── .gitignore
├── GraphicsCommon.h
├── GraphicsCommon.m
├── ImageConversion-Info.plist
├── ImageConversion.xcodeproj
    └── project.pbxproj
├── ImageConversion_Prefix.pch
├── ImageHelper.h
├── ImageHelper.m
├── MITLicense.txt
├── README.md
├── Shared
    └── main.m
├── iPad
    ├── AppDelegate_iPad.h
    ├── AppDelegate_iPad.mm
    ├── Icon4.png
    ├── MainWindow_iPad.xib
    └── ShareArrow.png
└── iPhone
    ├── AppDelegate_iPhone.h
    ├── AppDelegate_iPhone.m
    └── MainWindow_iPhone.xib


/.gitignore:
--------------------------------------------------------------------------------
 1 | .DS_Store
 2 | 
 3 | build/
 4 | 
 5 | *.pbxuser
 6 | *.perspective
 7 | *.perspectivev3
 8 | 
 9 | *.mode1v3
10 | *.mode2v3
11 | 
12 | # Xcode
13 | 
14 | *.pbxuser
15 | !default.pbxuser
16 | *.mode1v3
17 | !default.mode1v3
18 | *.mode2v3
19 | !default.mode2v3
20 | *.perspectivev3
21 | !default.perspectivev3
22 | *.xcworkspace
23 | !default.xcworkspace
24 | xcuserdata
25 | 


--------------------------------------------------------------------------------
/GraphicsCommon.h:
--------------------------------------------------------------------------------
  1 | //
  2 | //  GraphicsCommon.h
  3 | //  ImageConversion
  4 | //
  5 | //  Created by Paul Solt on 8/24/11.
  6 | //  Copyright 2011 Paul Solt. All rights reserved.
  7 | //
  8 | 
  9 | //#import <Foundation/Foundation.h>
 10 | //
 11 | //@interface GraphicsCommon : NSObject
 12 | //
 13 | //
 14 | //@end
 15 | 
 16 | #include <iostream>
 17 | #include <sstream>
 18 | 
 19 | static const int NUMBER_COLORS = 4;	
 20 | 
 21 | /** The Color3D structure is used for storing the Red, Green, Blue, and Alpha components. */
 22 | struct Color3D {
 23 |     
 24 |     Color3D() : red(0.0f), green(0.0f), blue(0.0f), alpha(1.0f) {}
 25 |     
 26 |     float red;
 27 |     float green;
 28 |     float blue;
 29 |     float alpha;
 30 | }; // Color3D;
 31 | 
 32 | /** Prints out a Color3D structure */
 33 | static std::ostream &operator<<(std::ostream &os, const Color3D &c) {
 34 |     os << "Color: (" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha << ")";
 35 |     return os;
 36 | }
 37 | 
 38 | static std::string toString(const Color3D &c) {
 39 |     std::ostringstream os;
 40 |     os << "Color: (" << c.red << ", " << c.green << ", " << c.blue << ", " << c.alpha << ")";
 41 |     std::string str(os.str());
 42 |     return str;
 43 | }
 44 | 
 45 | /** Converts a single color value from floating point space (0.0-1.0) to unsigned char (RGBA8) format.
 46 |  Red,green,blue,alpha in 0.0-1.0 space
 47 |  color will be in range 0-255
 48 |  Requires 4 component (RGBA) (unsigned char *) to be already allocated
 49 |  */
 50 | static inline void color3dToRGBA8(Color3D *colorIn, unsigned char *colorOut) {
 51 |     
 52 |     // Clamp the negative colors to black, it's undefined behavior otherwise. 
 53 |     Color3D newColor = *colorIn;
 54 |     if(newColor.red < 0) {
 55 |         newColor.red = 0;
 56 |     }
 57 |     if(newColor.green < 0) {
 58 |         newColor.green = 0;
 59 |     }
 60 |     if(newColor.blue < 0) {
 61 |         newColor.blue = 0;
 62 |     }
 63 |     
 64 |     colorOut[0] = static_cast<unsigned char>(newColor.red * 255);
 65 |     colorOut[1] = static_cast<unsigned char>(newColor.green * 255);
 66 |     colorOut[2] = static_cast<unsigned char>(newColor.blue * 255);
 67 |     colorOut[3] = static_cast<unsigned char>(newColor.alpha * 255);
 68 | }
 69 | 
 70 | static inline void RGBA8ToColor3d(unsigned char *colorIn, Color3D *colorOut) {
 71 |     colorOut->red = static_cast<float>(colorIn[0]) / 255.0f;
 72 |     colorOut->green = static_cast<float>(colorIn[1]) / 255.0f;
 73 |     colorOut->blue = static_cast<float>(colorIn[2]) / 255.0f;
 74 |     colorOut->alpha = static_cast<float>(colorIn[3]) / 255.0f;
 75 | }
 76 | 
 77 | /** Converts a single color value from the colors Red, Green, Blue, Alpha in RGBA8 format to floating
 78 |  point format in (0.0-1.0) range.
 79 |  Requires the memory to be allocated for the colorOut parameter.
 80 |  @param red - the red component
 81 |  @param green - the green component
 82 |  @param blue - the blue component
 83 |  @param alpha - the alpha component
 84 |  @param colorOut - the floating point Color3D structure to store the conversion
 85 |  */
 86 | static inline void RGBA8ToColor3d(unsigned char red, unsigned char green, unsigned char blue,
 87 |                                   unsigned char alpha, Color3D *colorOut) {
 88 |     colorOut->red = static_cast<float>(red) / 255.0f;
 89 |     colorOut->green = static_cast<float>(green) / 255.0f;
 90 |     colorOut->blue = static_cast<float>(blue) / 255.0f;
 91 |     colorOut->alpha = static_cast<float>(alpha) / 255.0f;
 92 | }
 93 | 
 94 | /** Converts a Color3D image to RGBA8 (unsigned char *) given the image dimensions. The function
 95 |  assumes the number of bytes per pixel color is 4. The memory should be allocated before calling this 
 96 |  method. It simply copies data from one type to the other. ImageOut should be width*height*4
 97 |  @param imageIn - the image that should be converted
 98 |  @param imageOut - the image that should be used for output
 99 |  @param width - the number of pixels wide
100 |  @param height - the number of pixels high.
101 |  */
102 | static inline void ConvertImageColor3dToRGBA8(Color3D *imageIn, unsigned char *imageOut, int width, int height) {
103 |     int length = width * height;
104 |     
105 |     // Need to increment unsigned char pointer by the number of colors each loop
106 |     for(int i = 0, j = 0; i < length; ++i, j+=NUMBER_COLORS) {
107 |         color3dToRGBA8(&imageIn[i], &imageOut[j]);
108 |     }
109 |     
110 | }
111 | 
112 | static inline void ConvertImageRGBA8ToColor3d(unsigned char *imageIn, Color3D *imageOut, int width, int height) {
113 |     int length = width * height;
114 |     
115 |     // Need to increment unsigned char pointer by the number of colors each loop
116 |     for(int i = 0, j = 0; i < length; ++i, j+=NUMBER_COLORS) {
117 |         RGBA8ToColor3d(&imageIn[j], &imageOut[i]);
118 |     }
119 | }


--------------------------------------------------------------------------------
/GraphicsCommon.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  GraphicsCommon.m
 3 | //  ImageConversion
 4 | //
 5 | //  Created by Paul Solt on 8/24/11.
 6 | //  Copyright 2011 Paul Solt. All rights reserved.
 7 | //
 8 | 
 9 | #import "GraphicsCommon.h"
10 | 
11 | @implementation GraphicsCommon
12 | 
13 | - (id)init
14 | {
15 |     self = [super init];
16 |     if (self) {
17 |         // Initialization code here.
18 |     }
19 |     
20 |     return self;
21 | }
22 | 
23 | 
24 | 
25 | 
26 | @end
27 | 


--------------------------------------------------------------------------------
/ImageConversion-Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>English</string>
 7 | 	<key>CFBundleDisplayName</key>
 8 | 	<string>${PRODUCT_NAME}</string>
 9 | 	<key>CFBundleExecutable</key>
10 | 	<string>${EXECUTABLE_NAME}</string>
11 | 	<key>CFBundleIconFile</key>
12 | 	<string>Icon4.png</string>
13 | 	<key>CFBundleIdentifier</key>
14 | 	<string>com.paulsolt.ImageConversion</string>
15 | 	<key>CFBundleInfoDictionaryVersion</key>
16 | 	<string>6.0</string>
17 | 	<key>CFBundleName</key>
18 | 	<string>${PRODUCT_NAME}</string>
19 | 	<key>CFBundlePackageType</key>
20 | 	<string>APPL</string>
21 | 	<key>CFBundleSignature</key>
22 | 	<string>????</string>
23 | 	<key>CFBundleVersion</key>
24 | 	<string>1.0</string>
25 | 	<key>LSRequiresIPhoneOS</key>
26 | 	<true/>
27 | 	<key>NSMainNibFile</key>
28 | 	<string>MainWindow_iPad</string>
29 | 	<key>NSMainNibFile~ipad</key>
30 | 	<string>MainWindow_iPad</string>
31 | 	<key>UISupportedInterfaceOrientations</key>
32 | 	<array>
33 | 		<string>UIInterfaceOrientationPortrait</string>
34 | 	</array>
35 | 	<key>UISupportedInterfaceOrientations~ipad</key>
36 | 	<array>
37 | 		<string>UIInterfaceOrientationPortrait</string>
38 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
39 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
40 | 		<string>UIInterfaceOrientationLandscapeRight</string>
41 | 	</array>
42 | </dict>
43 | </plist>
44 | 


--------------------------------------------------------------------------------
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219 | 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
220 | 				GCC_PREFIX_HEADER = ImageConversion_Prefix.pch;
221 | 				GCC_VERSION = com.apple.compilers.llvmgcc42;
222 | 				INFOPLIST_FILE = "ImageConversion-Info.plist";
223 | 				IPHONEOS_DEPLOYMENT_TARGET = 3.2;
224 | 				PRODUCT_NAME = ImageConversion;
225 | 			};
226 | 			name = Debug;
227 | 		};
228 | 		1D6058950D05DD3E006BFB54 /* Release */ = {
229 | 			isa = XCBuildConfiguration;
230 | 			buildSettings = {
231 | 				ALWAYS_SEARCH_USER_PATHS = NO;
232 | 				COPY_PHASE_STRIP = YES;
233 | 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
234 | 				GCC_PREFIX_HEADER = ImageConversion_Prefix.pch;
235 | 				GCC_VERSION = com.apple.compilers.llvmgcc42;
236 | 				INFOPLIST_FILE = "ImageConversion-Info.plist";
237 | 				IPHONEOS_DEPLOYMENT_TARGET = 3.2;
238 | 				PRODUCT_NAME = ImageConversion;
239 | 				VALIDATE_PRODUCT = YES;
240 | 			};
241 | 			name = Release;
242 | 		};
243 | 		C01FCF4F08A954540054247B /* Debug */ = {
244 | 			isa = XCBuildConfiguration;
245 | 			buildSettings = {
246 | 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
247 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
248 | 				GCC_C_LANGUAGE_STANDARD = c99;
249 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
250 | 				GCC_WARN_UNUSED_VARIABLE = YES;
251 | 				IPHONEOS_DEPLOYMENT_TARGET = 3.2;
252 | 				SDKROOT = iphoneos;
253 | 				TARGETED_DEVICE_FAMILY = "1,2";
254 | 			};
255 | 			name = Debug;
256 | 		};
257 | 		C01FCF5008A954540054247B /* Release */ = {
258 | 			isa = XCBuildConfiguration;
259 | 			buildSettings = {
260 | 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
261 | 				CODE_SIGN_IDENTITY = "iPhone Developer";
262 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
263 | 				GCC_C_LANGUAGE_STANDARD = c99;
264 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
265 | 				GCC_WARN_UNUSED_VARIABLE = YES;
266 | 				IPHONEOS_DEPLOYMENT_TARGET = 3.2;
267 | 				OTHER_CFLAGS = "-DNS_BLOCK_ASSERTIONS=1";
268 | 				PROVISIONING_PROFILE = "";
269 | 				SDKROOT = iphoneos;
270 | 				TARGETED_DEVICE_FAMILY = "1,2";
271 | 			};
272 | 			name = Release;
273 | 		};
274 | /* End XCBuildConfiguration section */
275 | 
276 | /* Begin XCConfigurationList section */
277 | 		1D6058960D05DD3E006BFB54 /* Build configuration list for PBXNativeTarget "ImageConversion" */ = {
278 | 			isa = XCConfigurationList;
279 | 			buildConfigurations = (
280 | 				1D6058940D05DD3E006BFB54 /* Debug */,
281 | 				1D6058950D05DD3E006BFB54 /* Release */,
282 | 			);
283 | 			defaultConfigurationIsVisible = 0;
284 | 			defaultConfigurationName = Release;
285 | 		};
286 | 		C01FCF4E08A954540054247B /* Build configuration list for PBXProject "ImageConversion" */ = {
287 | 			isa = XCConfigurationList;
288 | 			buildConfigurations = (
289 | 				C01FCF4F08A954540054247B /* Debug */,
290 | 				C01FCF5008A954540054247B /* Release */,
291 | 			);
292 | 			defaultConfigurationIsVisible = 0;
293 | 			defaultConfigurationName = Release;
294 | 		};
295 | /* End XCConfigurationList section */
296 | 	};
297 | 	rootObject = 29B97313FDCFA39411CA2CEA /* Project object */;
298 | }
299 | 


--------------------------------------------------------------------------------
/ImageConversion_Prefix.pch:
--------------------------------------------------------------------------------
1 | //
2 | // Prefix header for all source files of the 'ImageConversion' target in the 'ImageConversion' project
3 | //
4 | 
5 | #ifdef __OBJC__
6 |     #import <Foundation/Foundation.h>
7 |     #import <UIKit/UIKit.h>
8 | #endif
9 | 


--------------------------------------------------------------------------------
/ImageHelper.h:
--------------------------------------------------------------------------------
 1 | /*
 2 |  * The MIT License
 3 |  *
 4 |  * Copyright (c) 2011 Paul Solt, PaulSolt@gmail.com
 5 |  *
 6 |  * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 |  * of this software and associated documentation files (the "Software"), to deal
 8 |  * in the Software without restriction, including without limitation the rights
 9 |  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 |  * copies of the Software, and to permit persons to whom the Software is
11 |  * furnished to do so, subject to the following conditions:
12 |  *
13 |  * The above copyright notice and this permission notice shall be included in
14 |  * all copies or substantial portions of the Software.
15 |  *
16 |  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 |  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 |  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 |  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 |  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 |  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 |  * THE SOFTWARE.
23 |  *
24 |  */
25 | 
26 | #import <Foundation/Foundation.h>
27 | 
28 | 
29 | @interface ImageHelper : NSObject {
30 | 	
31 | }
32 | 
33 | /** Converts a UIImage to RGBA8 bitmap.
34 |  @param image - a UIImage to be converted
35 |  @return a RGBA8 bitmap, or NULL if any memory allocation issues. Cleanup memory with free() when done.
36 |  */
37 | + (unsigned char *) convertUIImageToBitmapRGBA8:(UIImage *)image;
38 | 
39 | /** A helper routine used to convert a RGBA8 to UIImage
40 |  @return a new context that is owned by the caller
41 |  */
42 | + (CGContextRef) newBitmapRGBA8ContextFromImage:(CGImageRef)image;
43 | 
44 | 
45 | /** Converts a RGBA8 bitmap to a UIImage. 
46 |  @param buffer - the RGBA8 unsigned char * bitmap
47 |  @param width - the number of pixels wide
48 |  @param height - the number of pixels tall
49 |  @return a UIImage that is autoreleased or nil if memory allocation issues
50 |  */
51 | + (UIImage *) convertBitmapRGBA8ToUIImage:(unsigned char *)buffer 
52 | 								withWidth:(int)width
53 | 							   withHeight:(int)height;
54 | 
55 | @end
56 | 
57 | 


--------------------------------------------------------------------------------
/ImageHelper.m:
--------------------------------------------------------------------------------
  1 | /*
  2 |  * The MIT License
  3 |  *
  4 |  * Copyright (c) 2011 Paul Solt, PaulSolt@gmail.com
  5 |  *
  6 |  * Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  * of this software and associated documentation files (the "Software"), to deal
  8 |  * in the Software without restriction, including without limitation the rights
  9 |  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  * copies of the Software, and to permit persons to whom the Software is
 11 |  * furnished to do so, subject to the following conditions:
 12 |  *
 13 |  * The above copyright notice and this permission notice shall be included in
 14 |  * all copies or substantial portions of the Software.
 15 |  *
 16 |  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 22 |  * THE SOFTWARE.
 23 |  *
 24 |  */
 25 | 
 26 | #import "ImageHelper.h"
 27 | 
 28 | 
 29 | @implementation ImageHelper
 30 | 
 31 | 
 32 | + (unsigned char *) convertUIImageToBitmapRGBA8:(UIImage *) image {
 33 | 	
 34 | 	CGImageRef imageRef = image.CGImage;
 35 | 	
 36 | 	// Create a bitmap context to draw the uiimage into
 37 | 	CGContextRef context = [self newBitmapRGBA8ContextFromImage:imageRef];
 38 | 	
 39 | 	if(!context) {
 40 | 		return NULL;
 41 | 	}
 42 | 	
 43 | 	size_t width = CGImageGetWidth(imageRef);
 44 | 	size_t height = CGImageGetHeight(imageRef);
 45 | 	
 46 | 	CGRect rect = CGRectMake(0, 0, width, height);
 47 | 	
 48 | 	// Draw image into the context to get the raw image data
 49 | 	CGContextDrawImage(context, rect, imageRef);
 50 | 	
 51 | 	// Get a pointer to the data	
 52 | 	unsigned char *bitmapData = (unsigned char *)CGBitmapContextGetData(context);
 53 | 	
 54 | 	// Copy the data and release the memory (return memory allocated with new)
 55 | 	size_t bytesPerRow = CGBitmapContextGetBytesPerRow(context);
 56 | 	size_t bufferLength = bytesPerRow * height;
 57 | 	
 58 | 	unsigned char *newBitmap = NULL;
 59 | 	
 60 | 	if(bitmapData) {
 61 | 		newBitmap = (unsigned char *)malloc(sizeof(unsigned char) * bytesPerRow * height);
 62 | 		
 63 | 		if(newBitmap) {	// Copy the data
 64 | 			for(int i = 0; i < bufferLength; ++i) {
 65 | 				newBitmap[i] = bitmapData[i];
 66 | 			}
 67 | 		}
 68 | 		
 69 | 		free(bitmapData);
 70 | 		
 71 | 	} else {
 72 | 		NSLog(@"Error getting bitmap pixel data\n");
 73 | 	}
 74 | 	
 75 | 	CGContextRelease(context);
 76 | 	
 77 | 	return newBitmap;	
 78 | }
 79 | 
 80 | + (CGContextRef) newBitmapRGBA8ContextFromImage:(CGImageRef) image {
 81 | 	CGContextRef context = NULL;
 82 | 	CGColorSpaceRef colorSpace;
 83 | 	uint32_t *bitmapData;
 84 | 	
 85 | 	size_t bitsPerPixel = 32;
 86 | 	size_t bitsPerComponent = 8;
 87 | 	size_t bytesPerPixel = bitsPerPixel / bitsPerComponent;
 88 | 	
 89 | 	size_t width = CGImageGetWidth(image);
 90 | 	size_t height = CGImageGetHeight(image);
 91 | 	
 92 | 	size_t bytesPerRow = width * bytesPerPixel;
 93 | 	size_t bufferLength = bytesPerRow * height;
 94 | 	
 95 | 	colorSpace = CGColorSpaceCreateDeviceRGB();
 96 | 	
 97 | 	if(!colorSpace) {
 98 | 		NSLog(@"Error allocating color space RGB\n");
 99 | 		return NULL;
100 | 	}
101 | 	
102 | 	// Allocate memory for image data
103 | 	bitmapData = (uint32_t *)malloc(bufferLength);
104 | 	
105 | 	if(!bitmapData) {
106 | 		NSLog(@"Error allocating memory for bitmap\n");
107 | 		CGColorSpaceRelease(colorSpace);
108 | 		return NULL;
109 | 	}
110 | 	
111 | 	//Create bitmap context
112 | 	context = CGBitmapContextCreate(bitmapData, 
113 | 									width, 
114 | 									height, 
115 | 									bitsPerComponent, 
116 | 									bytesPerRow, 
117 | 									colorSpace, 
118 |                                     kCGImageAlphaPremultipliedLast);	// RGBA
119 | 	
120 | 	if(!context) {
121 | 		free(bitmapData);
122 | 		NSLog(@"Bitmap context not created");
123 | 	}
124 | 	
125 | 	CGColorSpaceRelease(colorSpace);
126 | 	
127 | 	return context;	
128 | }
129 | 
130 | + (UIImage *) convertBitmapRGBA8ToUIImage:(unsigned char *) buffer 
131 | 								withWidth:(int) width
132 | 							   withHeight:(int) height {
133 | 	
134 | 	
135 | 	size_t bufferLength = width * height * 4;
136 | 	CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, buffer, bufferLength, NULL);
137 | 	size_t bitsPerComponent = 8;
138 | 	size_t bitsPerPixel = 32;
139 | 	size_t bytesPerRow = 4 * width;
140 | 	
141 | 	CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
142 | 	if(colorSpaceRef == NULL) {
143 | 		NSLog(@"Error allocating color space");
144 | 		CGDataProviderRelease(provider);
145 | 		return nil;
146 | 	}
147 | 	CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault | kCGImageAlphaPremultipliedLast;
148 | 	CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
149 | 	
150 | 	CGImageRef iref = CGImageCreate(width, 
151 | 									height, 
152 | 									bitsPerComponent, 
153 | 									bitsPerPixel, 
154 | 									bytesPerRow, 
155 | 									colorSpaceRef, 
156 | 									bitmapInfo, 
157 | 									provider,	// data provider
158 | 									NULL,		// decode
159 | 									YES,			// should interpolate
160 | 									renderingIntent);
161 | 		
162 | 	uint32_t* pixels = (uint32_t*)malloc(bufferLength);
163 | 	
164 | 	if(pixels == NULL) {
165 | 		NSLog(@"Error: Memory not allocated for bitmap");
166 | 		CGDataProviderRelease(provider);
167 | 		CGColorSpaceRelease(colorSpaceRef);
168 | 		CGImageRelease(iref);		
169 | 		return nil;
170 | 	}
171 | 	
172 | 	CGContextRef context = CGBitmapContextCreate(pixels, 
173 | 												 width, 
174 | 												 height, 
175 | 												 bitsPerComponent, 
176 | 												 bytesPerRow, 
177 | 												 colorSpaceRef,
178 |                                                  bitmapInfo);
179 | 	
180 | 	if(context == NULL) {
181 | 		NSLog(@"Error context not created");
182 | 		free(pixels);
183 | 	}
184 | 	
185 | 	UIImage *image = nil;
186 | 	if(context) {
187 | 		
188 | 		CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, width, height), iref);
189 | 		
190 | 		CGImageRef imageRef = CGBitmapContextCreateImage(context);
191 | 		
192 | 		// Support both iPad 3.2 and iPhone 4 Retina displays with the correct scale
193 | 		if([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)]) {
194 | 			float scale = [[UIScreen mainScreen] scale];
195 | 			image = [UIImage imageWithCGImage:imageRef scale:scale orientation:UIImageOrientationUp];
196 | 		} else {
197 | 			image = [UIImage imageWithCGImage:imageRef];
198 | 		}
199 | 		
200 | 		CGImageRelease(imageRef);	
201 | 		CGContextRelease(context);	
202 | 	}
203 | 	
204 | 	CGColorSpaceRelease(colorSpaceRef);
205 | 	CGImageRelease(iref);
206 | 	CGDataProviderRelease(provider);
207 | 	
208 | 	if(pixels) {
209 | 		free(pixels);
210 | 	}	
211 | 	return image;
212 | }
213 | 
214 | @end
215 | 


--------------------------------------------------------------------------------
/MITLicense.txt:
--------------------------------------------------------------------------------
 1 | The MIT License
 2 | 
 3 | Copyright (c) 2011 Paul Solt, PaulSolt@gmail.com
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in
13 | all copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21 | THE SOFTWARE.


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | UIImage Conversion Sample
 2 | -------------------------
 3 | Paul Solt 2010
 4 | 
 5 | Here's a sample project and code to convert between UIImage objects and RGBA8 bitmaps. The sample project is iPhone 4/iPad 3.2 compatible. 
 6 | 
 7 | The ImageHelper works with iPhone 4 and the Retina display using the correct scale factor with high resolution images.
 8 | 
 9 | 
10 | Basic Example Usage showing the ability to convert back and forth between formats: 
11 | ---------------------------------------------------------------------------------
12 | 
13 | // Look at the sample project for actual usage
14 | 
15 | 	NSString *path = (NSString*)[[NSBundle mainBundle] pathForResource:@"Icon4" ofType:@"png"];
16 | 	UIImage *image = [UIImage imageWithContentsOfFile:path]; 
17 | 	int width = image.size.width;
18 | 	int height = image.size.height;
19 | 	
20 | 	// Create a bitmap
21 | 	unsigned char *bitmap = [ImageHelper convertUIImageToBitmapRGBA8:image];
22 | 	
23 | 	// Create a UIImage using the bitmap
24 | 	UIImage *imageCopy = [ImageHelper convertBitmapRGBA8ToUIImage:bitmap withWidth:width withHeight:height];
25 | 	
26 | 	// Display the image copy on the GUI
27 | 	UIImageView *imageView = [[UIImageView alloc] initWithImage:imageCopy];
28 | 
29 | 	// Cleanup
30 | 	free(bitmap);
31 | 


--------------------------------------------------------------------------------
/Shared/main.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  main.m
 3 | //  ImageConversion
 4 | //
 5 | //  Created by Paul Solt on 9/22/10.
 6 | //  Copyright 2010 Paul Solt. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | int main(int argc, char *argv[]) {
12 |     
13 |     NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
14 |     int retVal = UIApplicationMain(argc, argv, nil, nil);
15 |     [pool release];
16 |     return retVal;
17 | }
18 | 


--------------------------------------------------------------------------------
/iPad/AppDelegate_iPad.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate_iPad.h
 3 | //  ImageConversion
 4 | //
 5 | //  Created by Paul Solt on 9/22/10.
 6 | //  Copyright 2010 RIT. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate_iPad : NSObject <UIApplicationDelegate> {
12 |     UIWindow *window;
13 | }
14 | 
15 | @property (nonatomic, retain) IBOutlet UIWindow *window;
16 | 
17 | 
18 | // Adds an image to an imageview on the window
19 | - (void)addImage:(NSString *)theFilename atPosition:(CGPoint)thePosition;
20 | 
21 | @end
22 | 
23 | 


--------------------------------------------------------------------------------
/iPad/AppDelegate_iPad.mm:
--------------------------------------------------------------------------------
  1 | //
  2 | //  AppDelegate_iPad.m
  3 | //  ImageConversion
  4 | //
  5 | //  Created by Paul Solt on 9/22/10.
  6 | //  Copyright 2010 RIT. All rights reserved.
  7 | //
  8 | 
  9 | #import "AppDelegate_iPad.h"
 10 | #import "ImageHelper.h"
 11 | #import "GraphicsCommon.h"
 12 | 
 13 | @implementation AppDelegate_iPad
 14 | 
 15 | @synthesize window;
 16 | 
 17 | 
 18 | #pragma mark -
 19 | #pragma mark Application lifecycle
 20 | 
 21 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
 22 |     
 23 |     // Override point for customization after application launch.
 24 | //
 25 | //    UIImage *image = [UIImage imageNamed:@"Icon4.png"];
 26 | //	int width = image.size.width;
 27 | //	int height = image.size.height;
 28 | //	
 29 | //	// Create a bitmap
 30 | //	unsigned char *bitmap = [ImageHelper convertUIImageToBitmapRGBA8:image];
 31 | //	
 32 | //	// Create a UIImage using the bitmap
 33 | //	UIImage *imageCopy = [ImageHelper convertBitmapRGBA8ToUIImage:bitmap withWidth:width withHeight:height];
 34 | //	
 35 | //	// Cleanup
 36 | //	if(bitmap) {
 37 | //		free(bitmap);	
 38 | //		bitmap = NULL;
 39 | //	}
 40 | //	
 41 | //	// Display the image copy on the GUI
 42 | //	UIImageView *imageView = [[UIImageView alloc] initWithImage:imageCopy];
 43 | //	CGPoint center = CGPointMake([UIScreen mainScreen].bounds.size.width / 2.0, 
 44 | //								 [UIScreen mainScreen].bounds.size.height / 2.0);
 45 | //	[imageView setCenter:center];
 46 | //	[window addSubview:imageView];
 47 | //	[imageView release];
 48 |     CGPoint iconPosition = CGPointMake([UIScreen mainScreen].bounds.size.width / 2.0, 
 49 |                                         [UIScreen mainScreen].bounds.size.height / 2.0);
 50 |     [self addImage:@"Icon4.png" atPosition:iconPosition];
 51 |     
 52 |     CGPoint arrowPosition = CGPointMake([UIScreen mainScreen].bounds.size.width / 2.0, 
 53 |                                    [UIScreen mainScreen].bounds.size.height / 4.0);
 54 |     [self addImage:@"ShareArrow.png" atPosition:arrowPosition];
 55 | 	
 56 |     [window makeKeyAndVisible];
 57 |     
 58 |     return YES;
 59 | }
 60 | 
 61 | - (void)addImage:(NSString *)theFilename atPosition:(CGPoint)thePosition {
 62 |     UIImage *image = [UIImage imageNamed:theFilename];
 63 | 	int width = image.size.width;
 64 | 	int height = image.size.height;
 65 | 	
 66 | 	// Create a bitmap
 67 | 	unsigned char *bitmap = [ImageHelper convertUIImageToBitmapRGBA8:image];
 68 |     Color3D *colorOut = new Color3D[width * height];
 69 |     ConvertImageRGBA8ToColor3d(bitmap, colorOut, width, height);
 70 |     
 71 |     // **NOTE:** Test Print the colors using a c++ code to check transparency
 72 | //    for(int i = 0; i < width * height; ++i) {
 73 | //        std::cout << colorOut[i] << std::endl;
 74 | //    }
 75 | 	
 76 | 	// Create a UIImage using the bitmap
 77 | 	UIImage *imageCopy = [ImageHelper convertBitmapRGBA8ToUIImage:bitmap withWidth:width withHeight:height];
 78 | 	
 79 | 	// Cleanup
 80 | 	if(bitmap) {
 81 | 		free(bitmap);	
 82 | 		bitmap = NULL;
 83 | 	}
 84 | 	
 85 | 	// Display the image copy on the GUI
 86 | 	UIImageView *imageView = [[UIImageView alloc] initWithImage:imageCopy];
 87 | 	[imageView setCenter:thePosition];
 88 | 	[window addSubview:imageView];
 89 | 	[imageView release];
 90 | }
 91 | 
 92 | 
 93 | - (void)applicationWillResignActive:(UIApplication *)application {
 94 |     /*
 95 |      Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
 96 |      Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
 97 |      */
 98 | }
 99 | 
100 | 
101 | - (void)applicationDidBecomeActive:(UIApplication *)application {
102 |     /*
103 |      Restart any tasks that were paused (or not yet started) while the application was inactive.
104 |      */
105 | }
106 | 
107 | 
108 | - (void)applicationWillTerminate:(UIApplication *)application {
109 |     /*
110 |      Called when the application is about to terminate.
111 |      */
112 | }
113 | 
114 | 
115 | #pragma mark -
116 | #pragma mark Memory management
117 | 
118 | - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
119 |     /*
120 |      Free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later.
121 |      */
122 | }
123 | 
124 | 
125 | - (void)dealloc {
126 |     [window release];
127 |     [super dealloc];
128 | }
129 | 
130 | 
131 | @end
132 | 


--------------------------------------------------------------------------------
/iPad/Icon4.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/PaulSolt/UIImage-Conversion/cc7c5e10763d650ae16a8e3d8736e486e597cdc8/iPad/Icon4.png


--------------------------------------------------------------------------------
/iPad/MainWindow_iPad.xib:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="UTF-8"?>
  2 | <archive type="com.apple.InterfaceBuilder3.CocoaTouch.iPad.XIB" version="7.10">
  3 | 	<data>
  4 | 		<int key="IBDocument.SystemTarget">1024</int>
  5 | 		<string key="IBDocument.SystemVersion">10F569</string>
  6 | 		<string key="IBDocument.InterfaceBuilderVersion">804</string>
  7 | 		<string key="IBDocument.AppKitVersion">1038.29</string>
  8 | 		<string key="IBDocument.HIToolboxVersion">461.00</string>
  9 | 		<object class="NSMutableDictionary" key="IBDocument.PluginVersions">
 10 | 			<string key="NS.key.0">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
 11 | 			<string key="NS.object.0">123</string>
 12 | 		</object>
 13 | 		<object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
 14 | 			<bool key="EncodedWithXMLCoder">YES</bool>
 15 | 		</object>
 16 | 		<object class="NSArray" key="IBDocument.PluginDependencies">
 17 | 			<bool key="EncodedWithXMLCoder">YES</bool>
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--------------------------------------------------------------------------------
/iPad/ShareArrow.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/PaulSolt/UIImage-Conversion/cc7c5e10763d650ae16a8e3d8736e486e597cdc8/iPad/ShareArrow.png


--------------------------------------------------------------------------------
/iPhone/AppDelegate_iPhone.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate_iPhone.h
 3 | //  ImageConversion
 4 | //
 5 | //  Created by Paul Solt on 9/22/10.
 6 | //  Copyright 2010 RIT. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate_iPhone : NSObject <UIApplicationDelegate> {
12 |     UIWindow *window;
13 | }
14 | 
15 | @property (nonatomic, retain) IBOutlet UIWindow *window;
16 | 
17 | @end
18 | 
19 | 


--------------------------------------------------------------------------------
/iPhone/AppDelegate_iPhone.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate_iPhone.m
 3 | //  ImageConversion
 4 | //
 5 | //  Created by Paul Solt on 9/22/10.
 6 | //  Copyright 2010 RIT. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate_iPhone.h"
10 | 
11 | @implementation AppDelegate_iPhone
12 | 
13 | @synthesize window;
14 | 
15 | 
16 | #pragma mark -
17 | #pragma mark Application lifecycle
18 | 
19 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
20 |     
21 |     // Override point for customization after application launch.
22 |     
23 |     [window makeKeyAndVisible];
24 |     
25 |     return YES;
26 | }
27 | 
28 | 
29 | - (void)applicationWillResignActive:(UIApplication *)application {
30 |     /*
31 |      Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
32 |      Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
33 |      */
34 | }
35 | 
36 | 
37 | - (void)applicationDidEnterBackground:(UIApplication *)application {
38 |     /*
39 |      Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
40 |      If your application supports background execution, called instead of applicationWillTerminate: when the user quits.
41 |      */
42 | }
43 | 
44 | 
45 | - (void)applicationWillEnterForeground:(UIApplication *)application {
46 |     /*
47 |      Called as part of  transition from the background to the inactive state: here you can undo many of the changes made on entering the background.
48 |      */
49 | }
50 | 
51 | 
52 | - (void)applicationDidBecomeActive:(UIApplication *)application {
53 |     /*
54 |      Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
55 |      */
56 | }
57 | 
58 | 
59 | - (void)applicationWillTerminate:(UIApplication *)application {
60 |     /*
61 |      Called when the application is about to terminate.
62 |      See also applicationDidEnterBackground:.
63 |      */
64 | }
65 | 
66 | 
67 | #pragma mark -
68 | #pragma mark Memory management
69 | 
70 | - (void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
71 |     /*
72 |      Free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later.
73 |      */
74 | }
75 | 
76 | 
77 | - (void)dealloc {
78 |     [window release];
79 |     [super dealloc];
80 | }
81 | 
82 | 
83 | @end
84 | 


--------------------------------------------------------------------------------
/iPhone/MainWindow_iPhone.xib:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="UTF-8"?>
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  6 | 		<string key="IBDocument.InterfaceBuilderVersion">782</string>
  7 | 		<string key="IBDocument.AppKitVersion">1038.29</string>
  8 | 		<string key="IBDocument.HIToolboxVersion">460.00</string>
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 20 | 		</object>
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328 | 


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