2014/10/15 下午 10:05:04

iphone Programming Glossary: cgimagegetheight

Retrieving a pixel alpha value for a UIImage

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

CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel..

Convert image to grayscale

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

pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB..

How do I export UIImage array as a movie?

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

context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress..

UIImagePickerController camera preview is portrait in landscape app

http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app

Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity CGRect bounds CGRectMake 0 0 width height.. CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation switch orient case UIImageOrientationUp..

How to Mask an UIImageView

http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview

CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow maskRef..

Dispelling the UIImage imageNamed: FUD

http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud

imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel originalImage CGImageGetBytesPerRow..

Retrieving a pixel alpha value for a UIImage

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

and created a RGBA byte array from this. Alpha is premultiplied. CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent..

Convert image to grayscale

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

bitsPerComponent 8 unsigned char getBytesForImage UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData malloc height width 4 CGContextRef..

How do I export UIImage array as a movie?

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

kCGImageAlphaNoneSkipFirst NSParameterAssert context CGContextConcatCTM context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer frameSize is a CGSize describing..

UIImagePickerController camera preview is portrait in landscape app

http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app

scaleAndRotateImage UIImage image int kMaxResolution 640 Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity CGRect bounds CGRectMake 0 0 width height if width kMaxResolution height kMaxResolution CGFloat ratio.. bounds.size.width roundf bounds.size.height ratio CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation switch orient case UIImageOrientationUp EXIF 1 transform CGAffineTransformIdentity break..

How to Mask an UIImageView

http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview

... UIImage maskImage UIImage image withMask UIImage maskImage CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow maskRef CGImageGetDataProvider maskRef NULL false CGImageRef maskedImageRef..

Dispelling the UIImage imageNamed: FUD

http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud

CGDataProviderRef imageDataProvider CGDataProviderCreateWithCFData imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage CGImageGetBitsPerComponent originalImage CGImageGetBitsPerPixel originalImage CGImageGetBytesPerRow originalImage CGImageGetColorSpace originalImage..

Retrieving a pixel alpha value for a UIImage

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

Alpha is premultiplied. CGImageRef image uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel..

Convert image to grayscale

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

UIImage pImage CGImageRef image pImage CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData..

CGImage/UIImage lazily loading on UI thread causes stutter

http://stackoverflow.com/questions/1815476/cgimage-uiimage-lazily-loading-on-ui-thread-causes-stutter

UIImage image CGImageRef imgRef image.CGImage CGFloat currentWidth CGImageGetWidth imgRef CGFloat currentHeight CGImageGetHeight imgRef CGRect bounds CGRectMake 0.0f 0.0f 1.0f 1.0f CGAffineTransform transform CGAffineTransformIdentity CGFloat scaleRatioX..

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

CGContextRef ctx CGImageRef imageRef source CGImage NSUInteger width CGImageGetWidth imageRef NSUInteger height CGImageGetHeight imageRef CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char inputData malloc height width 4 unsigned char.. 2 inputData indexInput 2 outputData indexOutput 3 255.0 ctx CGBitmapContextCreate outputData CGImageGetWidth imageRef CGImageGetHeight imageRef 8 CGImageGetBytesPerRow imageRef CGImageGetColorSpace imageRef kCGImageAlphaPremultipliedLast imageRef CGBitmapContextCreateImage..

MFMailComposeViewController image orientation

http://stackoverflow.com/questions/20204495/mfmailcomposeviewcontroller-image-orientation

UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage self imageView setImage gImag send image to screen self imagePickerControllerRelease picker free the picker.. gAddr nil UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage NSData imageAsNSData UIImageJPEGRepresentation gImag mailVC setMailComposeDelegate self mailVC setToRecipients.. gAddr nil UIImageOrientation orient gImag.imageOrientation CGFloat width CGImageGetWidth gImag.CGImage CGFloat height CGImageGetHeight gImag.CGImage UIImage tmp UIImage alloc initWithCGImage gImag.CGImage orient tmp.imageOrientation width CGImageGetWidth..

UIImage resize (Scale proportion) [duplicate]

http://stackoverflow.com/questions/2645768/uiimage-resize-scale-proportion

image toResolution int resolution CGImageRef imgRef image CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGRect bounds CGRectMake 0 0 width height if already at the minimum resolution return the orginal image otherwise..

Inner Shadow in UILabel

http://stackoverflow.com/questions/3231690/inner-shadow-in-uilabel

CGImage UIGraphicsEndImageContext CGImageRef mask CGImageMaskCreate CGImageGetWidth shape CGImageGetHeight shape CGImageGetBitsPerComponent shape CGImageGetBitsPerPixel shape CGImageGetBytesPerRow shape CGImageGetDataProvider..

How do I export UIImage array as a movie?

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

context CGContextConcatCTM context frameTransform CGContextDrawImage context CGRectMake 0 0 CGImageGetWidth image CGImageGetHeight image image CGColorSpaceRelease rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return..

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

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

UIImage saver nil CGImageRef 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..

UIImagePickerController camera preview is portrait in landscape app

http://stackoverflow.com/questions/538041/uiimagepickercontroller-camera-preview-is-portrait-in-landscape-app

int kMaxResolution 640 Or whatever CGImageRef imgRef image.CGImage CGFloat width CGImageGetWidth imgRef CGFloat height CGImageGetHeight imgRef CGAffineTransform transform CGAffineTransformIdentity CGRect bounds CGRectMake 0 0 width height if width kMaxResolution.. ratio CGFloat scaleRatio bounds.size.width width CGSize imageSize CGSizeMake CGImageGetWidth imgRef CGImageGetHeight imgRef CGFloat boundHeight UIImageOrientation orient image.imageOrientation switch orient case UIImageOrientationUp EXIF..

How to Mask an UIImageView

http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview

UIImage maskImage CGImageRef maskRef maskImage.CGImage CGImageRef mask CGImageMaskCreate CGImageGetWidth maskRef CGImageGetHeight maskRef CGImageGetBitsPerComponent maskRef CGImageGetBitsPerPixel maskRef CGImageGetBytesPerRow maskRef CGImageGetDataProvider..

How to make one color transparent on a UIImage?

http://stackoverflow.com/questions/633722/how-to-make-one-color-transparent-on-a-uiimage

New CGImageRef createMask UIImage temp CGImageRef ref temp.CGImage int mWidth CGImageGetWidth ref int mHeight CGImageGetHeight ref int count mWidth mHeight 4 void bufferdata malloc count CGColorSpaceRef colorSpaceRef CGColorSpaceCreateDeviceRGB CGBitmapInfo..

Dispelling the UIImage imageNamed: FUD

http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud