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2014/10/15 ¤U¤È 10:05:04
iphone Programming Glossary: cgimagegetwidthRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage byte array from this. Alpha is premultiplied. CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale 8 unsigned char getBytesForImage UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie context CGContextConcatCTM context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress..
UIImagePickerController camera preview is portrait in landscape app http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app UIImage image int kMaxResolution 640 Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity.. bounds.size.height ratio CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview withMask UIImage maskImage CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud CGDataProviderCreateWithCFData imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage obtained the CGImage from UIImageView image and created a RGBA byte array from this. Alpha is premultiplied. CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale way #define bytesPerPixel 4 #define bitsPerComponent 8 unsigned char getBytesForImage UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie rgbColorSpace kCGImageAlphaNoneSkipFirst NSParameterAssert context CGContextConcatCTM context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer frameSize..
UIImagePickerController camera preview is portrait in landscape app http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app thread.jspa messageID 7949889 UIImage scaleAndRotateImage UIImage image int kMaxResolution 640 Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity CGRect bounds CGRectMake 0 0 width height if width kMaxResolution.. bounds.size.height kMaxResolution bounds.size.width roundf bounds.size.height ratio CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation switch orient case UIImageOrientationUp EXIF 1 transform CGAffineTransformIdentity..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview image withMask mask ... UIImage maskImage UIImage image withMask UIImage maskImage CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow maskRef CGImageGetDataProvider maskRef..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud originalImage CGDataProviderRef imageDataProvider CGDataProviderCreateWithCFData imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel originalImage CGImageGetBytesPerRow originalImage CGImageGetColorSpace..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage and created a RGBA byte array from this. Alpha is premultiplied. CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale bitsPerComponent 8 unsigned char getBytesForImage UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB..
CGImage/UIImage lazily loading on UI thread causes stutter http://stackoverflow.com/questions/1815476/cgimage-uiimage-lazily-loading-on-ui-thread-causes-stutter Anyway the method is void forceLazyLoadOfImage UIImage image CGImageRef imgRef image.CGImage CGFloat currentWidth CGImageGetWidth imgRef CGFloat currentHeight CGImageGetHeight imgRef CGRect bounds CGRectMake 0.0f 0.0f 1.0f 1.0f CGAffineTransform transform..
How do I create/render a UIImage from a 3D transformed UIImageView? http://stackoverflow.com/questions/1949003/how-do-i-create-render-a-uiimage-from-a-3d-transformed-uiimageview UIGraphicsEndImageContext CGContextRef ctx CGImageRef imageRef source CGImage NSUInteger width CGImageGetWidth imageRef NSUInteger height CGImageGetHeight imageRef CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char.. 1 outputData indexOutput 2 inputData indexInput 2 outputData indexOutput 3 255.0 ctx CGBitmapContextCreate outputData CGImageGetWidth imageRef CGImageGetHeight imageRef 8 CGImageGetBytesPerRow imageRef CGImageGetColorSpace imageRef kCGImageAlphaPremultipliedLast..
MFMailComposeViewController image orientation http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation info valueForKey UIImagePickerControllerOriginalImage UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage self imageView setImage gImag send image to screen self imagePickerControllerRelease.. new NSArray aAddr NSArray arrayWithObjects gAddr nil UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage NSData imageAsNSData UIImageJPEGRepresentation gImag mailVC.. new NSArray aAddr NSArray arrayWithObjects gAddr nil UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage UIImage tmp UIImage alloc initWithCGImage gImag.CGImage orient..
UIImage resize (Scale proportion) [duplicate] http://stackoverflow.com/questions/2645768/uiimage-resize-scale-proportion to fit UIImage scaleImage UIImage image toResolution int resolution CGImageRef imgRef image CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGRect bounds CGRectMake 0 0 width height if already at the minimum resolution..
http://stackoverflow.com/questions/3231690/inner-shadow-in-uilabel shape UIGraphicsGetImageFromCurrentImageContext CGImage UIGraphicsEndImageContext CGImageRef mask CGImageMaskCreate CGImageGetWidth shape CGImageGetHeight shape CGImageGetBitsPerComponent shape CGImageGetBitsPerPixel shape CGImageGetBytesPerRow..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie NSParameterAssert context CGContextConcatCTM context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress..
layer.renderInContext doesn't take layer.mask into account? http://stackoverflow.com/questions/4896296/layer-renderincontext-doesnt-take-layer-mask-into-account applies the mask correctly IBAction saveImage UIImage saver nil CGImageRef image imageView.image.CGImage size_t cWidth CGImageGetWidth image size_t cHeight CGImageGetHeight image size_t bitsPerComponent 8 size_t bytesPerRow 4 cWidth Now we build a Context..
UIImagePickerController camera preview is portrait in landscape app http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app scaleAndRotateImage UIImage image int kMaxResolution 640 Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity CGRect bounds CGRectMake.. roundf bounds.size.height ratio CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation switch orient case UIImageOrientationUp..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview UIImage image withMask UIImage maskImage CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow..
How to make one color transparent on a UIImage? http://stackoverflow.com/questions/633722/how-to-make-one-color-transparent-on-a-uiimage resultedimage UIImage imageWithCGImage New CGImageRef createMask UIImage temp CGImageRef ref temp.CGImage int mWidth CGImageGetWidth ref int mHeight CGImageGetHeight ref int count mWidth mHeight 4 void bufferdata malloc count CGColorSpaceRef colorSpaceRef..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud imageDataProvider CGDataProviderCreateWithCFData imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel originalImage..
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