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project_files/HedgewarsMobile/Classes/UIImageExtra.m
changeset 6209 074ab6ebcb3e
parent 6080 ce02ddfe8aa1
child 6700 e04da46ee43c
equal deleted inserted replaced
6208:b831679e9467 6209:074ab6ebcb3e 
    23 
    23 
    24 
    24 
    25 @implementation UIImage (extra)
 
    25 @implementation UIImage (extra)
 
    26 
    26 
    27 -(UIImage *)scaleToSize:(CGSize) size {
 
    27 -(UIImage *)scaleToSize:(CGSize) size {
 
    28     DLog(@"warning - this is a very expensive operation, you should avoid using it");
 
       
    29 
       
    30     // Create a bitmap graphics context; this will also set it as the current context
 
    28     // Create a bitmap graphics context; this will also set it as the current context
 
    31     UIGraphicsBeginImageContextWithOptions(size, NO, [[UIScreen mainScreen] scale]);
 
    29     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
    32 
    30     CGContextRef context = CGBitmapContextCreate(NULL, size.width, size.height, 8, 4 * size.width, colorSpace, kCGImageAlphaPremultipliedFirst);
 
    33     // Draw the scaled image in the current context
 
    31 
    34     [self drawInRect:CGRectMake(0, 0, size.width, size.height)];
 
    32     // draw the image inside the context
 
    35 
    33     CGFloat screenScale = [[UIScreen mainScreen] safeScale];
 
    36     // Create a new image from current context
 
    34     CGContextDrawImage(context, CGRectMake(0, 0, size.width*screenScale, size.height*screenScale), self.CGImage);
 
    37     UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
 
    35 
    38 
    36     // Create bitmap image info from pixel data in current context
 
    39     // Pop the current context from the stack
 
    37     CGImageRef imageRef = CGBitmapContextCreateImage(context);
 
    40     UIGraphicsEndImageContext();
 
    38 
    41 
    39     // Create a new UIImage object
 
    42     // Return our new scaled image (autoreleased)
 
    40     UIImage *resultImage;
 
    43     return scaledImage;
 
    41     if ([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
 
       
    42         resultImage = [UIImage imageWithCGImage:imageRef scale:screenScale orientation:UIImageOrientationUp];
 
       
    43     else
 
       
    44         resultImage = [UIImage imageWithCGImage:imageRef];
 
       
    45 
       
    46     // Release colorspace, context and bitmap information
 
       
    47     CGColorSpaceRelease(colorSpace);
 
       
    48     CGContextRelease(context);
 
       
    49     CFRelease(imageRef);
 
       
    50 
       
    51     return resultImage;
 
    44 }
 
    52 }
 
    45 
    53 
    46 -(UIImage *)mergeWith:(UIImage *)secondImage atPoint:(CGPoint) secondImagePoint {
 
    54 -(UIImage *)mergeWith:(UIImage *)secondImage atPoint:(CGPoint) secondImagePoint {
 
    47     if (secondImage == nil) {
 
    55     if (secondImage == nil) {
 
    48         DLog(@"Warning, secondImage == nil");
 
    56         DLog(@"Warning, secondImage == nil");
 
    49         return self;
 
    57         return self;
 
    50     }
 
    58     }
 
    51     CGFloat screenScale = [[UIScreen mainScreen] scale];
 
    59     CGFloat screenScale = [[UIScreen mainScreen] safeScale];
 
    52     int w = self.size.width * screenScale;
 
    60     int w = self.size.width * screenScale;
 
    53     int h = self.size.height * screenScale;
 
    61     int h = self.size.height * screenScale;
 
    54     int yOffset = self.size.height - secondImage.size.height + secondImagePoint.y;
 
    62     int yOffset = self.size.height - secondImage.size.height + secondImagePoint.y;
 
    55 
    63 
    56     if (w == 0 || h == 0) {
 
    64     if (w == 0 || h == 0) {
 
    57         DLog(@"Cannot have 0 dimesions");
 
    65         DLog(@"Cannot have 0 dimesions");
 
    58         return self;
 
    66         return self;
 
    59     }
 
    67     }
 
    60     
    68 
    61     // Create a bitmap graphics context; this will also set it as the current context
 
    69     // Create a bitmap graphics context; this will also set it as the current context
 
    62     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
    70     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
    63     CGContextRef context = CGBitmapContextCreate(NULL, w, h+yOffset, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
 
    71     CGContextRef context = CGBitmapContextCreate(NULL, w, h+yOffset, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
 
    64     
    72 
    65     // draw the two images in the current context
 
    73     // draw the two images in the current context
 
    66     CGContextDrawImage(context, CGRectMake(0, 0, self.size.width*screenScale, self.size.height*screenScale), [self CGImage]);
 
    74     CGContextDrawImage(context, CGRectMake(0, 0, self.size.width*screenScale, self.size.height*screenScale), [self CGImage]);
 
    67     CGContextDrawImage(context, CGRectMake(secondImagePoint.x*screenScale, secondImagePoint.y*screenScale, secondImage.size.width*screenScale, secondImage.size.height*screenScale), [secondImage CGImage]);
 
    75     CGContextDrawImage(context, CGRectMake(secondImagePoint.x*screenScale, secondImagePoint.y*screenScale, secondImage.size.width*screenScale, secondImage.size.height*screenScale), [secondImage CGImage]);
 
    68     
    76 
    69     // Create bitmap image info from pixel data in current context
 
    77     // Create bitmap image info from pixel data in current context
 
    70     CGImageRef imageRef = CGBitmapContextCreateImage(context);
 
    78     CGImageRef imageRef = CGBitmapContextCreateImage(context);
 
    71     
    79 
    72     // Create a new UIImage object
 
    80     // Create a new UIImage object
 
    73     UIImage *resultImage = [UIImage imageWithCGImage:imageRef scale:screenScale orientation:UIImageOrientationUp];
 
    81     UIImage *resultImage;
 
       
    82     if ([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
 
       
    83         resultImage = [UIImage imageWithCGImage:imageRef scale:screenScale orientation:UIImageOrientationUp];
 
       
    84     else
 
       
    85         resultImage = [UIImage imageWithCGImage:imageRef];
 
    74 
    86 
    75     // Release colorspace, context and bitmap information
 
    87     // Release colorspace, context and bitmap information
 
    76     CGColorSpaceRelease(colorSpace);
 
    88     CGColorSpaceRelease(colorSpace);
 
    77     CGContextRelease(context);
 
    89     CGContextRelease(context);
 
    78     CFRelease(imageRef);
 
    90     CFRelease(imageRef);
 
    79    
    91 
    80     return resultImage;
 
    92     return resultImage;
 
    81 }
 
    93 }
 
    82 
    94 
    83 -(id) initWithContentsOfFile:(NSString *)path andCutAt:(CGRect) rect {
 
    95 -(id) initWithContentsOfFile:(NSString *)path andCutAt:(CGRect) rect {
 
    84     // load image from path
 
    96     // load image from path
 
   188 }
 
   200 }
 
   189 
   201 
   190 -(UIImage *)makeRoundCornersOfSize:(CGSize) sizewh {
 
   202 -(UIImage *)makeRoundCornersOfSize:(CGSize) sizewh {
 
   191     CGFloat cornerWidth = sizewh.width;
 
   203     CGFloat cornerWidth = sizewh.width;
 
   192     CGFloat cornerHeight = sizewh.height;
 
   204     CGFloat cornerHeight = sizewh.height;
 
   193     CGFloat screenScale = [[UIScreen mainScreen] scale];
 
   205     CGFloat screenScale = [[UIScreen mainScreen] safeScale];
 
   194     CGFloat w = self.size.width * screenScale;
 
   206     CGFloat w = self.size.width * screenScale;
 
   195     CGFloat h = self.size.height * screenScale;
 
   207     CGFloat h = self.size.height * screenScale;
 
   196 
   208 
   197     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
   209     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
   198     CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
 
   210     CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
 
   207 
   219 
   208     CGImageRef imageMasked = CGBitmapContextCreateImage(context);
 
   220     CGImageRef imageMasked = CGBitmapContextCreateImage(context);
 
   209     CGContextRelease(context);
 
   221     CGContextRelease(context);
 
   210     CGColorSpaceRelease(colorSpace);
 
   222     CGColorSpaceRelease(colorSpace);
 
   211 
   223 
   212     UIImage *newImage = [UIImage imageWithCGImage:imageMasked scale:screenScale orientation:UIImageOrientationUp];
 
   224     UIImage *resultImage;
 
   213 
   225     if ([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
 
       
   226         resultImage = [UIImage imageWithCGImage:imageMasked scale:screenScale orientation:UIImageOrientationUp];
 
       
   227     else
 
       
   228         resultImage = [UIImage imageWithCGImage:imageMasked];
 
   214     CGImageRelease(imageMasked);
 
   229     CGImageRelease(imageMasked);
 
   215 
   230 
   216     return newImage;
 
   231     return resultImage;
 
   217 }
 
   232 }
 
   218 
   233 
   219 // by http://www.sixtemia.com/journal/2010/06/23/uiimage-negative-color-effect/
 
   234 // by http://www.sixtemia.com/journal/2010/06/23/uiimage-negative-color-effect/
 
   220 -(UIImage *)convertToNegative {
 
   235 -(UIImage *)convertToNegative {
 
   221     UIGraphicsBeginImageContext(self.size);
 
   236     UIGraphicsBeginImageContext(self.size);
 
   249     UIImage *bkgImg = [UIImage imageWithCGImage:image];
 
   264     UIImage *bkgImg = [UIImage imageWithCGImage:image];
 
   250     CGImageRelease(image);
 
   265     CGImageRelease(image);
 
   251     return bkgImg;
 
   266     return bkgImg;
 
   252 }
 
   267 }
 
   253 
   268 
       
   269 +(UIImage *)drawHogsRepeated:(NSInteger) manyTimes {
 
       
   270     NSString *imgString = [[NSString alloc] initWithFormat:@"%@/hedgehog.png",[[NSBundle mainBundle] resourcePath]];
 
       
   271     UIImage *hogSprite = [[UIImage alloc] initWithContentsOfFile:imgString];
 
       
   272     [imgString release];
 
       
   273     CGFloat screenScale = [[UIScreen mainScreen] safeScale];
 
       
   274     int w = hogSprite.size.width * screenScale;
 
       
   275     int h = hogSprite.size.height * screenScale;
 
       
   276     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 
       
   277     CGContextRef context = CGBitmapContextCreate(NULL, w * 3, h, 8, 4 * w * 3, colorSpace, kCGImageAlphaPremultipliedFirst);
 
       
   278 
       
   279     // draw the two images in the current context
 
       
   280     for (int i = 0; i < manyTimes; i++)
 
       
   281         CGContextDrawImage(context, CGRectMake(i*8*screenScale, 0, w, h), [hogSprite CGImage]);
 
       
   282     [hogSprite release];
 
       
   283 
       
   284     // Create bitmap image info from pixel data in current context
 
       
   285     CGImageRef imageRef = CGBitmapContextCreateImage(context);
 
       
   286 
       
   287     // Create a new UIImage object
 
       
   288     UIImage *resultImage;
 
       
   289     if ([UIImage respondsToSelector:@selector(imageWithCGImage:scale:orientation:)])
 
       
   290         resultImage = [UIImage imageWithCGImage:imageRef scale:screenScale orientation:UIImageOrientationUp];
 
       
   291     else
 
       
   292         resultImage = [UIImage imageWithCGImage:imageRef];
 
       
   293 
       
   294     // Release colorspace, context and bitmap information
 
       
   295     CGColorSpaceRelease(colorSpace);
 
       
   296     CGContextRelease(context);
 
       
   297     CFRelease(imageRef);
 
       
   298 
       
   299     return resultImage;
 
       
   300 }
 
       
   301 
   254 // this routine checks for the PNG size without loading it in memory
 
   302 // this routine checks for the PNG size without loading it in memory
 
   255 // https://github.com/steipete/PSFramework/blob/master/PSFramework%20Version%200.3/PhotoshopFramework/PSMetaDataFunctions.m
 
   303 // https://github.com/steipete/PSFramework/blob/master/PSFramework%20Version%200.3/PhotoshopFramework/PSMetaDataFunctions.m
 
   256 +(CGSize) imageSizeFromMetadataOf:(NSString *)aFileName {
 
   304 +(CGSize) imageSizeFromMetadataOf:(NSString *)aFileName {
 
   257     // File Name to C String.
 
   305     // File Name to C String.
 
   258     const char *fileName = [aFileName UTF8String];
 
   306     const char *fileName = [aFileName UTF8String];
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