2014/10/15 下午 10:05:03

iphone Programming Glossary: cgdataprovidercreatewithdata

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

CGColorSpaceCreateDeviceRGB CGBitmapInfo bitmapInfo CGImageGetBitmapInfo imageRef CGDataProviderRef provider CGDataProviderCreateWithData NULL pixels data length NULL CGImageRef newImageRef CGImageCreate width height bitsPerComponent bitsPerPixel bytesPerRow..

Drawing into OpenGL ES framebuffer and getting UIImage from it on iPhone

http://stackoverflow.com/questions/10936157/drawing-into-opengl-es-framebuffer-and-getting-uiimage-from-it-on-iphone

glPixelStorei GL_PACK_ALIGNMENT 4 glReadPixels x y width height GL_RGBA GL_UNSIGNED_BYTE data CGDataProviderRef ref CGDataProviderCreateWithData NULL data dataLength NULL CGColorSpaceRef colorspace CGColorSpaceCreateDeviceRGB CGImageRef iref CGImageCreate width height..

memory leak when using CGImageCreateWithJPEGDataProvider

http://stackoverflow.com/questions/12211158/memory-leak-when-using-cgimagecreatewithjpegdataprovider

there is a leak and how to solve it. CGImageCreateWithJPEGDataProvider method cause the memory leak mainly. Sometimes CGDataProviderCreateWithData also cause memory leak. But i don't know why. The leak method in Class A is as follows ResultHolder decodeData UInt8 data.. sizeof UInt8 memcpy buffer data offset 22 length sometimes memory leak in this line CGDataProviderRef jpgDataProvider CGDataProviderCreateWithData NULL buffer length freeData mainly memory leak in this line. CGImageRef image CGImageCreateWithJPEGDataProvider jpgDataProvider..

Image processing Glamour filter in iphone

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

if outputBlue 255 outputBlue 255 data i outputRed data i 1 outputGreen data i 2 outputBlue CGDataProviderRef provider2 CGDataProviderCreateWithData NULL data myDataLength NULL int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 width CGColorSpaceRef colorSpaceRef..

Creating UIImage from raw RGBA data

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

rawData 6 rawData 7 255.0f NSLog @ i i i f rawData 8 rawData 9 rawData 10 rawData 11 255.0f CGDataProviderRef provider CGDataProviderCreateWithData NULL rawData width height 4 NULL int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 width CGColorSpaceRef..

take screen Programmatically of UIview+glview

http://stackoverflow.com/questions/6197137/take-screen-programmatically-of-uiviewglview

x width 4 x buffer2 height 1 y width 4 x buffer y 4 width x make data provider with data. CGDataProviderRef provider CGDataProviderCreateWithData NULL buffer2 myDataLength NULL prep the ingredients int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 width CGColorSpaceRef..

How to make one color transparent on a UIImage?

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

0 mWidth mHeight CGContextDrawImage cgctx rect ref bufferdata CGBitmapContextGetData cgctx CGDataProviderRef provider CGDataProviderCreateWithData NULL bufferdata mWidth mHeight 4 NULL CGImageRef savedimageref CGImageCreate mWidth mHeight 8 32 mWidth 4 colorSpaceRef..

Blur an UIImage on change of slider

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

was the problem.. you had given srcData instead of destData.. Rest all were perfect... CGDataProviderRef dataProvider CGDataProviderCreateWithData NULL destData bitmapByteCount NULL CGImageRef blurredImageRef CGImageCreate width height CGBitmapContextGetBitsPerComponent..

iPhone take augmented reality screenshot with AVCaptureVideoPreviewLayer

http://stackoverflow.com/questions/8980847/iphone-take-augmented-reality-screenshot-with-avcapturevideopreviewlayer

to ignore the alpha channel otherwise use kCGImageAlphaPremultipliedLast CGDataProviderRef ref CGDataProviderCreateWithData NULL data dataLength NULL CGColorSpaceRef colorspace CGColorSpaceCreateDeviceRGB CGImageRef iref CGImageCreate width height..

GLPaint save image

http://stackoverflow.com/questions/946700/glpaint-save-image

int x 0 x 320 4 x buffer2 479 y 320 4 x buffer y 4 320 x make data provider with data. CGDataProviderRef provider CGDataProviderCreateWithData NULL buffer2 myDataLength NULL prep the ingredients int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 320 CGColorSpaceRef..

Capturing EAGLview content WITH alpha channel on iPhone

http://stackoverflow.com/questions/962390/capturing-eaglview-content-with-alpha-channel-on-iphone

unsigned char buffer 320 480 4 glReadPixels 0 0 320 480 GL_RGBA GL_UNSIGNED_BYTE buffer CGDataProviderRef ref CGDataProviderCreateWithData NULL buffer 320 480 4 NULL CGImageRef iref CGImageCreate 320 480 8 32 320 4 CGColorSpaceCreateDeviceRGB kCGBitmapByteOrderDefault..

Save OpenGL Drawn item as a Image

http://stackoverflow.com/questions/9660723/save-opengl-drawn-item-as-a-image

Saving imageRef from GLPaint creates completely black image

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

work with the flipped buffer so get rid of the original one. make data provider with data. CGDataProviderRef provider CGDataProviderCreateWithData NULL buffer2 myDataLength NULL prep the ingredients int bitsPerComponent 8 int bitsPerPixel 32 int bytesPerRow 4 w s CGColorSpaceRef..