2014/10/15 下午 10:13:29

iphone Programming Glossary: rgbcolorspace

How do I export UIImage array as a movie?

http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie

pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata frameSize.width frameSize.height 8 4 frameSize.width.. CGContextRef context CGBitmapContextCreate pxdata frameSize.width frameSize.height 8 4 frameSize.width rgbColorSpace kCGImageAlphaNoneSkipFirst NSParameterAssert context CGContextConcatCTM context frameTransform CGContextDrawImage context.. CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer frameSize is a CGSize describing your..

ASSETWriterInput for making Video from UIImages on Iphone Issues

http://stackoverflow.com/questions/3983882/assetwriterinput-for-making-video-from-uiimages-on-iphone-issues

Get RGB value from UIColor presets

http://stackoverflow.com/questions/4700168/get-rgb-value-from-uicolor-presets

don't have reasonable RGB values. void getRGBComponents CGFloat 3 components forColor UIColor color CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB unsigned char resultingPixel 4 CGContextRef context CGBitmapContextCreate resultingPixel .. unsigned char resultingPixel 4 CGContextRef context CGBitmapContextCreate resultingPixel 1 1 8 4 rgbColorSpace kCGImageAlphaNoneSkipLast CGContextSetFillColorWithColor context color CGColor CGContextFillRect context CGRectMake 0.. context color CGColor CGContextFillRect context CGRectMake 0 0 1 1 CGContextRelease context CGColorSpaceRelease rgbColorSpace for int component 0 component 3 component components component resultingPixel component 255.0f You can use it something..

iPhone CGContextRef CGBitmapContextCreate unsupported parameter combination

http://stackoverflow.com/questions/5545600/iphone-cgcontextref-cgbitmapcontextcreate-unsupported-parameter-combination

works for me when trying to save image I got from AVCaptureSession. And don't forget to release it CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef bitmap CGBitmapContextCreate NULL newRect.size.width newRect.size.height .. CGBitmapContextCreate NULL newRect.size.width newRect.size.height CGImageGetBitsPerComponent imageRef 0 rgbColorSpace CGImageGetColorSpace imageRef sometimes contains unsupported colorspace bitmapInfo CGColorSpaceRelease rgbColorSpace ..

AVFoundation + AssetWriter: Generate Movie With Images and Audio

http://stackoverflow.com/questions/5640657/avfoundation-assetwriter-generate-movie-with-images-and-audio

pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata size.width size.height 8 4 size.width rgbColorSpace.. CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata size.width size.height 8 4 size.width rgbColorSpace kCGImageAlphaNoneSkipFirst NSParameterAssert context CGContextConcatCTM context CGAffineTransformMakeRotation 0 CGContextDrawImage.. 0 CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer So can you help me out regarding how..

AVAssetWriter Woes

http://stackoverflow.com/questions/6189535/avassetwriter-woes

pxbuffer 0 void pxdata CVPixelBufferGetBaseAddress pxbuffer NSParameterAssert pxdata NULL CGColorSpaceRef rgbColorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata size.width size.height 8 4 size.width rgbColorSpace.. CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate pxdata size.width size.height 8 4 size.width rgbColorSpace kCGImageAlphaNoneSkipFirst NSParameterAssert context CGContextConcatCTM context CGAffineTransformMakeRotation 0 CGContextDrawImage.. 0 CGContextDrawImage context CGRectMake 90 10 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer iphone ios avassetwriter share improve..

How do I add a gradient to the text of a UILabel, but not the background?

http://stackoverflow.com/questions/1266179/how-do-i-add-a-gradient-to-the-text-of-a-uilabel-but-not-the-background

context self.text UTF8String strlen self.text UTF8String CGContextClip context CGGradientRef gradient CGColorSpaceRef rgbColorspace size_t num_locations 2 CGFloat locations 2 0.0 1.0 CGFloat components 8 1.0 1.0 1.0 1.0 Start color 1.0 1.0 1.0 0.1 End.. num_locations 2 CGFloat locations 2 0.0 1.0 CGFloat components 8 1.0 1.0 1.0 1.0 Start color 1.0 1.0 1.0 0.1 End color rgbColorspace CGColorSpaceCreateDeviceRGB gradient CGGradientCreateWithColorComponents rgbColorspace components locations num_locations.. color 1.0 1.0 1.0 0.1 End color rgbColorspace CGColorSpaceCreateDeviceRGB gradient CGGradientCreateWithColorComponents rgbColorspace components locations num_locations CGRect currentBounds self.bounds CGPoint topCenter CGPointMake CGRectGetMidX currentBounds..

How to get UILabel (UITextView) auto adjusted font size?

http://stackoverflow.com/questions/3669844/how-to-get-uilabel-uitextview-auto-adjusted-font-size

font...Is it even possible draw gradient CGContextSaveGState myContext CGGradientRef glossGradient CGColorSpaceRef rgbColorspace size_t num_locations 2 CGFloat locations 2 0.0 1.0 CGFloat components 8 1 1 1 0.25 BOTTOM color 1 1 1 0.12 UPPER color scale.. 1.0 create mask CGImageRef alphaMask CGBitmapContextCreateImage myContext CGContextClipToMask myContext rect alphaMask rgbColorspace CGColorSpaceCreateDeviceRGB glossGradient CGGradientCreateWithColorComponents rgbColorspace components locations num_locations.. myContext rect alphaMask rgbColorspace CGColorSpaceCreateDeviceRGB glossGradient CGGradientCreateWithColorComponents rgbColorspace components locations num_locations gradient should be sized to actual font size. THIS IS THE PROBLEM EVEN IF FONT IS AUTO..

How do you explicitly animate a CALayer's backgroundColor?

http://stackoverflow.com/questions/518192/how-do-you-explicitly-animate-a-calayers-backgroundcolor

but I can't figure out how to properly wrap a CGColorRef value to pass to the animation. For example CGColorSpaceRef rgbColorspace CGColorSpaceCreateDeviceRGB CGFloat values 4 1.0 0.0 0.0 1.0 CGColorRef red CGColorCreate rgbColorspace values CGColorSpaceRelease.. rgbColorspace CGColorSpaceCreateDeviceRGB CGFloat values 4 1.0 0.0 0.0 1.0 CGColorRef red CGColorCreate rgbColorspace values CGColorSpaceRelease rgbColorspace CABasicAnimation selectionAnimation CABasicAnimation animationWithKeyPath @ backgroundColor.. CGFloat values 4 1.0 0.0 0.0 1.0 CGColorRef red CGColorCreate rgbColorspace values CGColorSpaceRelease rgbColorspace CABasicAnimation selectionAnimation CABasicAnimation animationWithKeyPath @ backgroundColor selectionAnimation setDuration..

iPhone Glossy Icons Using Core Graphics

http://stackoverflow.com/questions/5541457/iphone-glossy-icons-using-core-graphics

UIImage icon UIImage newImage CGContextRef context CGGradientRef glossGradient CGColorSpaceRef rgbColorspace CGRect currentBounds CGRectMake 0 0 icon.size.width icon.size.height CGPoint topCenter CGPointMake CGRectGetMidX currentBounds.. context CGContextClip context icon drawInRect currentBounds addGlossPath context currentBounds CGContextClip context rgbColorspace CGColorSpaceCreateDeviceRGB glossGradient CGGradientCreateWithColorComponents rgbColorspace components locations 2 CGContextDrawLinearGradient.. CGContextClip context rgbColorspace CGColorSpaceCreateDeviceRGB glossGradient CGGradientCreateWithColorComponents rgbColorspace components locations 2 CGContextDrawLinearGradient context glossGradient topCenter midCenter 0 UIGraphicsPopContext newImage..