2014/10/15 下午 10:04:36

iphone Programming Glossary: bitspercomponent

How to change thin image to fat image in iPhone SDK?

http://stackoverflow.com/questions/10186200/how-to-change-thin-image-to-fat-image-in-iphone-sdk

from the modified pixel data size_t width CGImageGetWidth imageRef size_t height CGImageGetHeight imageRef size_t bitsPerComponent CGImageGetBitsPerComponent imageRef size_t bitsPerPixel CGImageGetBitsPerPixel imageRef size_t bytesPerRow CGImageGetBytesPerRow.. provider CGDataProviderCreateWithData NULL pixels data length NULL CGImageRef newImageRef CGImageCreate width height bitsPerComponent bitsPerPixel bytesPerRow colorspace bitmapInfo provider NULL false kCGRenderingIntentDefault the modified image UIImage..

Retrieving a pixel alpha value for a UIImage

http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage

CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast.. bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextDrawImage..

Convert image to grayscale

http://stackoverflow.com/questions/1298867/convert-image-to-grayscale

to grayscale I am trying to convert an image into grayscale in the following way #define bytesPerPixel 4 #define bitsPerComponent 8 unsigned char getBytesForImage UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger.. unsigned char rawData malloc height width 4 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextDrawImage..

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

char outputData malloc height width 4 NSUInteger bytesPerPixel 4 NSUInteger bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate inputData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast.. bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate inputData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextDrawImage.. CGRectMake 0 0 width height imageRef CGContextRelease context context CGBitmapContextCreate outputData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextDrawImage..

Extracting images from a PDF

http://stackoverflow.com/questions/2475450/extracting-images-from-a-pdf

return document CGFloat decodeValuesFromImageDictionary CGPDFDictionaryRef dict CGColorSpaceRef cgColorSpace NSInteger bitsPerComponent CGFloat decodeValues NULL CGPDFArrayRef decodeArray NULL if CGPDFDictionaryGetArray dict Decode decodeArray size_t count.. kCGColorSpaceModelIndexed decodeValues malloc sizeof CGFloat 2 decodeValues 0 0.0 decodeValues 1 pow 2.0 double bitsPerComponent 1 break default break return CGFloat CFMakeCollectable decodeValues UIImage getImageRef CGPDFStreamRef myStream CGPDFArrayRef..

Image processing Glamour filter in iphone

http://stackoverflow.com/questions/3549396/image-processing-glamour-filter-in-iphone

data i 2 outputBlue CGDataProviderRef provider2 CGDataProviderCreateWithData NULL data myDataLength NULL int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 width CGColorSpaceRef colorSpaceRef CGColorSpaceCreateDeviceRGB CGBitmapInfo bitmapInfo.. CGColorRenderingIntent renderingIntent kCGRenderingIntentDefault CGImageRef imageRef CGImageCreate width height bitsPerComponent bitsPerPixel bytesPerRow colorSpaceRef bitmapInfo provider2 NULL NO renderingIntent CGColorSpaceRelease colorSpaceRef YOU..

Creating UIImage from raw RGBA data

http://stackoverflow.com/questions/4545237/creating-uiimage-from-raw-rgba-data

11 255.0f CGDataProviderRef provider CGDataProviderCreateWithData NULL rawData width height 4 NULL int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 width CGColorSpaceRef colorSpaceRef CGColorSpaceCreateDeviceRGB CGBitmapInfo bitmapInfo..

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

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

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 with those dimensions. CGContextRef context CGBitmapContextCreate nil.. 4 cWidth Now we build a Context with those dimensions. CGContextRef context CGBitmapContextCreate nil cWidth cHeight bitsPerComponent bytesPerRow CGColorSpaceCreateDeviceRGB CGImageGetBitmapInfo image The location where you draw your image on the context..

Filling a portion of an image with color

http://stackoverflow.com/questions/8124308/filling-a-portion-of-an-image-with-color

char rawData malloc height width 4 NSUInteger bytesPerPixel 4 NSUInteger bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast.. bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big CGColorSpaceRelease colorSpace CGContextDrawImage..

Saving imageRef from GLPaint creates completely black image

http://stackoverflow.com/questions/9857912/saving-imageref-from-glpaint-creates-completely-black-image

data. CGDataProviderRef provider CGDataProviderCreateWithData NULL buffer2 myDataLength NULL prep the ingredients int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 w s CGColorSpaceRef colorSpaceRef CGColorSpaceCreateDeviceRGB CGBitmapInfo bitmapInfo.. renderingIntent kCGRenderingIntentDefault make the cgimage CGImageRef imageRef CGImageCreate w s h s bitsPerComponent bitsPerPixel bytesPerRow colorSpaceRef bitmapInfo provider NULL NO renderingIntent then make the uiimage from that UIImage..