2014/10/15 下午 10:04:42

iphone Programming Glossary: bpr

How to implement didReceiveMemoryWarning?

http://stackoverflow.com/questions/2430728/how-to-implement-didreceivememorywarning

http://stackoverflow.com/questions/6073259/getting-rgb-pixel-data-from-cgimage

CGImageRef cgimage image.CGImage size_t width CGImageGetWidth cgimage size_t height CGImageGetHeight cgimage size_t bpr CGImageGetBytesPerRow cgimage size_t bpp CGImageGetBitsPerPixel cgimage size_t bpc CGImageGetBitsPerComponent cgimage size_t.. s n kCGBitmapByteOrder32Big s n file int width int height CGImageGetColorSpace cgimage int bpp int bpc int bpr unsigned info info kCGBitmapAlphaInfoMask YES NO info kCGBitmapFloatComponents YES NO info kCGBitmapByteOrderMask info kCGBitmapByteOrderMask.. printf Pixel Data n for size_t row 0 row height row for size_t col 0 col width col const uint8_t pixel bytes row bpr col bytes_per_pixel printf for size_t x 0 x bytes_per_pixel x printf .2X pixel x if x bytes_per_pixel 1 printf printf..

Blur an UIImage on change of slider

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

destData finalData size_t width CGBitmapContextGetWidth context size_t height CGBitmapContextGetHeight context size_t bpr CGBitmapContextGetBytesPerRow context size_t bpp CGBitmapContextGetBitsPerPixel context 8 CGRect rect 0.0f 0.0f width height.. with the bitmap context. srcData unsigned char CGBitmapContextGetData context if srcData NULL size_t dataSize bpr height finalData malloc dataSize destData malloc dataSize memcpy finalData srcData dataSize memcpy destData srcData dataSize.. y width x for i 0 i bpp i sums i p2 i gauss_fact k for i 0 i bpp i p3 i sums i gauss_sum size_t bitmapByteCount bpr height Here was the problem.. you had given srcData instead of destData.. Rest all were perfect... CGDataProviderRef dataProvider..