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2014/10/15 ¤U¤È 10:04:38

iphone Programming Glossary: bmcontext

Rotate image in UIImageView

http://stackoverflow.com/questions/7191492/rotate-image-in-uiimageview

CGRectApplyAffineTransform imgRect transform CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef bmContext CGBitmapContextCreate NULL rotatedRect.size.width rotatedRect.size.height 8 0 colorSpace kCGImageAlphaPremultipliedFirst.. rotatedRect.size.height 8 0 colorSpace kCGImageAlphaPremultipliedFirst CGContextSetAllowsAntialiasing bmContext YES CGContextSetShouldAntialias bmContext YES CGContextSetInterpolationQuality bmContext kCGInterpolationHigh CGColorSpaceRelease.. colorSpace kCGImageAlphaPremultipliedFirst CGContextSetAllowsAntialiasing bmContext YES CGContextSetShouldAntialias bmContext YES CGContextSetInterpolationQuality bmContext kCGInterpolationHigh CGColorSpaceRelease colorSpace CGContextTranslateCTM..

Blur an UIImage on change of slider

http://stackoverflow.com/questions/8758433/blur-an-uiimage-on-change-of-slider

CGColorSpaceCreateDeviceRGB Create the bitmap context we want pre multiplied ARGB 8 bits per component CGContextRef bmContext CGBitmapContextCreate NULL width height 8 Bits per component bytesPerRow colorSpace kCGBitmapByteOrderDefault kCGImageAlphaPremultipliedFirst.. bytesPerRow colorSpace kCGBitmapByteOrderDefault kCGImageAlphaPremultipliedFirst CGColorSpaceRelease colorSpace return bmContext UIImage blurredImageUsingGaussFactor NSUInteger gaussFactor andPixelRadius NSUInteger pixelRadius CGImageRef cgImage self.CGImage..