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2014/10/15 ¤U¤È 10:10:21

iphone Programming Glossary: initwithcgimage

memory leak when using CGImageCreateWithJPEGDataProvider

http://stackoverflow.com/questions/12211158/memory-leak-when-using-cgimagecreatewithjpegdataprovider

NULL true kCGRenderingIntentSaturation CGDataProviderRelease jpgDataProvider ResultHolder result ResultHolder alloc initWithCGImage image sometimes memory leaks in this line. CGImageRelease image return result Also some other related methods class A free.. callback. void freeData void info const void data size_t size free void data class ReslutHolder init and dealloc. id initWithCGImage CGImageRef image if self super init CGImageRetain image sometimes memory leak in this line. mBitmap CGImageCreateCopy image..

Another iPhone - CGBitmapContextCreateImage Leak

http://stackoverflow.com/questions/1434714/another-iphone-cgbitmapcontextcreateimage-leak

colorSpace ... draw into context CGImageRef imageRef CGBitmapContextCreateImage context UIImage image UIImage alloc initWithCGImage imageRef CGImageRelease imageRef CGContextRelease context After fbrereto's answer below I changed the code to this UIImage..

Uiscrollview lazy loading

http://stackoverflow.com/questions/14659650/uiscrollview-lazy-loading

self.scrollView.frame.size self.currentImageSize imageViewFrame.size THIS IS WRONG UIImage image UIImage alloc initWithCGImage asset.aspectRatioThumbnail UIImageView imageView UIImageView alloc initWithImage image imageView.clipsToBounds YES imageView.contentMode.. self dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_BACKGROUND 0 ^ UIImage tmpImage UIImage alloc initWithCGImage asset.defaultRepresentation.fullScreenImage __strong __typeof__ weakSelf strongSelf weakSelf if strongSelf.scrollView viewWithTag.. self dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_BACKGROUND 0 ^ UIImage tmpImage UIImage alloc initWithCGImage asset.aspectRatioThumbnail __strong __typeof__ weakSelf strongSelf weakSelf if strongSelf.scrollView viewWithTag tagNumber..

Cropping an image in iOS using OpenCV face detection

http://stackoverflow.com/questions/14756505/cropping-an-image-in-ios-using-opencv-face-detection

pointing me that its because of Rotation issue. I have Rotated the Image as below. UIImage rotateImage UIImage alloc initWithCGImage image.CGImage scale 1.0 orientation UIImageOrientationRight And Cropped the image using the below Code get sub image..

MFMailComposeViewController image orientation

http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation

CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage UIImage tmp UIImage alloc initWithCGImage gImag.CGImage orient tmp.imageOrientation width CGImageGetWidth tmp.CGImage height CGImageGetHeight tmp.CGImage NSData imageAsNSData..

How to erase part of an image as the user touches it

http://stackoverflow.com/questions/2978382/how-to-erase-part-of-an-image-as-the-user-touches-it

kCGBitmapByteOrderDefault provider NULL false kCGRenderingIntentDefault UIImage ret UIImage alloc initWithCGImage imageRef CGImageRelease imageRef CGDataProviderRelease provider CGColorSpaceRelease colorSpace data release return ret Now..

CoreGraphics for retina display

http://stackoverflow.com/questions/4707465/coregraphics-for-retina-display

originalHeight image CGImage CGImageRef cgImage CGBitmapContextCreateImage ctx UIImage resultImage UIImage alloc initWithCGImage cgImage CGContextRelease ctx CGImageRelease cgImage return resultImage How do I change this to make it retina compatible... you do all your manipulation at double resolution. Then you need to change the initialization of resultImage to use initWithCGImage scale orientation and input the same scale factor. This is what makes Retina devices render the output at native resolution..

layer.renderInContext doesn't take layer.mask into account?

http://stackoverflow.com/questions/4896296/layer-renderincontext-doesnt-take-layer-mask-into-account

cWidth cHeight mosaicLayer.image.CGImage CGImageRef mergeResult CGBitmapContextCreateImage context saver UIImage alloc initWithCGImage mergeResult CGContextRelease context CGImageRelease mergeResult UIImageWriteToSavedPhotosAlbum saver self @selector image..

How to draw a color wheel in objective-c

http://stackoverflow.com/questions/5108921/how-to-draw-a-color-wheel-in-objective-c

8 32 width 4 colorSpace kCGImageAlphaLast dataProvider NULL 0 kCGRenderingIntentDefault UIImage image UIImage alloc initWithCGImage imageRef CGDataProviderRelease dataProvider CGColorSpaceRelease colorSpace CGImageRelease imageRef return image Adapted..

Is there an SDK to draw lines on iOS with touch?

http://stackoverflow.com/questions/6774352/is-there-an-sdk-to-draw-lines-on-ios-with-touch

maskRef NULL false CGImageRef masked CGImageCreateWithMask image CGImage mask UIImage tempImage UIImage alloc initWithCGImage masked self.clippedImage tempImage tempImage release CFRelease masked CFRelease mask void awakeFromNib self initialize id..

How to properly crop an image taken on iPhone 4G (with EXIF rotation data)?

http://stackoverflow.com/questions/7203847/how-to-properly-crop-an-image-taken-on-iphone-4g-with-exif-rotation-data

EXIF rotation information is to use this dude's code but instead of using this line UIImage resultImage UIImage alloc initWithCGImage resultImageRef autorelease You should call this UIImage resultImage UIImage alloc initWithCGImage resultImageRef scale 1.0.. UIImage alloc initWithCGImage resultImageRef autorelease You should call this UIImage resultImage UIImage alloc initWithCGImage resultImageRef scale 1.0 orientation originalImage.imageOrientation autorelease The second call embeds rotation information..

Create image from RGB data?

http://stackoverflow.com/questions/7235991/create-image-from-rgb-data

UIView: how to do non-destructive drawing?

http://stackoverflow.com/questions/865636/uiview-how-to-do-non-destructive-drawing

drawingContext CGImageRef cgImage CGBitmapContextCreateImage drawingContext UIImage uiImage UIImage alloc initWithCGImage cgImage UIGraphicsPopContext CGImageRelease cgImage uiImage drawInRect rect uiImage release TODO can anyone optimize the..

iPhone take augmented reality screenshot with AVCaptureVideoPreviewLayer

http://stackoverflow.com/questions/8980847/iphone-take-augmented-reality-screenshot-with-avcapturevideopreviewlayer

CGContextRelease newContext free tempAddress if newImage nil modified for iOS5.0 with ARC tempImage UIImage alloc initWithCGImage newImage scale CGFloat 1.0 orientation cameraImageOrientation CGImageRelease newImage this call creates the illusion of.. imageRect overlayCopy CGImageRef newImage CGBitmapContextCreateImage context UIImage combinedViewImage UIImage alloc initWithCGImage newImage autorelease CGImageRelease newImage CGImageRelease overlayCopy CGContextRelease context CGColorSpaceRelease colorSpace.. imageRect overlayCopy CGImageRef newImage CGBitmapContextCreateImage context UIImage combinedViewImage UIImage alloc initWithCGImage newImage autorelease CGImageRelease newImage CGImageRelease overlayCopy CGContextRelease context CGColorSpaceRelease colorSpace..