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2014/10/15 ¤U¤È 10:12:23
iphone Programming Glossary: originalwidthCoreGraphics for retina display http://stackoverflow.com/questions/4707465/coregraphics-for-retina-display becomes blurry when it is on the retina display UIImage createImageSection UIImage image section CGRect section float originalWidth image.size.width float originalHeight image.size.height int w originalWidth section.size.width int h originalHeight section.size.height.. UIImage image section CGRect section float originalWidth image.size.width float originalHeight image.size.height int w originalWidth section.size.width int h originalHeight section.size.height CGContextRef ctx CGBitmapContextCreate nil w h 8 w 8 CGImageGetColorSpace.. nil w h 8 w 8 CGImageGetColorSpace image CGImage kCGImageAlphaPremultipliedLast CGContextClearRect ctx CGRectMake 0 0 originalWidth section.size.width originalHeight section.size.height w h before CGContextTranslateCTM ctx float originalWidth section.origin.x..
Blur an UIImage on change of slider http://stackoverflow.com/questions/8758433/blur-an-uiimage-on-change-of-slider NSUInteger gaussFactor andPixelRadius NSUInteger pixelRadius CGImageRef cgImage self.CGImage const size_t originalWidth CGImageGetWidth cgImage const size_t originalHeight CGImageGetHeight cgImage const size_t bytesPerRow originalWidth 4 CGContextRef.. originalWidth CGImageGetWidth cgImage const size_t originalHeight CGImageGetHeight cgImage const size_t bytesPerRow originalWidth 4 CGContextRef context NYXImageCreateARGBBitmapContext originalWidth originalHeight bytesPerRow if context return nil unsigned.. CGImageGetHeight cgImage const size_t bytesPerRow originalWidth 4 CGContextRef context NYXImageCreateARGBBitmapContext originalWidth originalHeight bytesPerRow if context return nil unsigned char srcData destData finalData size_t width CGBitmapContextGetWidth..
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