2014/10/15 下午 10:05:02

iphone Programming Glossary: cgdataprovidercreatewithcfdata

Any idea why this image masking code does not work?

http://stackoverflow.com/questions/1133248/any-idea-why-this-image-masking-code-does-not-work

0 0 maskWidth maskHeight image CGContextRelease ctx now make a mask from the data. CGDataProviderRef dataProvider CGDataProviderCreateWithCFData dataBuffer CGImageRef mask CGImageMaskCreate maskWidth maskHeight 8 8 bytesPerRow dataProvider NULL FALSE CGDataProviderRelease..

matchTemplate opencv not working as shown in opencv document

http://stackoverflow.com/questions/12049358/matchtemplate-opencv-not-working-as-shown-in-opencv-document

1 colorSpace CGColorSpaceCreateDeviceGray else colorSpace CGColorSpaceCreateDeviceRGB CGDataProviderRef provider CGDataProviderCreateWithCFData __bridge CFDataRef data CGImageRef imageRef CGImageCreate cvMat.cols cvMat.rows 8 8 cvMat.elemSize cvMat.step 0 colorSpace..

OpenCV install in xcode

http://stackoverflow.com/questions/12214273/opencv-install-in-xcode

Extracting images from a PDF

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

renderingIntentFromName renderingIntentName imageDataPtr CGPDFStreamCopyData dataStream format dataProvider CGDataProviderCreateWithCFData imageDataPtr CFRelease imageDataPtr if CGPDFDictionaryGetArray dict ColorSpace colorSpaceArray cgColorSpace CGColorSpaceCreateDeviceRGB..

How to erase part of an image as the user touches it

http://stackoverflow.com/questions/2978382/how-to-erase-part-of-an-image-as-the-user-touches-it

image imageSize NSData data NSData dataWithBytes image imageData length image imageSize CGDataProviderRef provider CGDataProviderCreateWithCFData CFDataRef data CGImageRef imageRef CGImageCreate image width image height image depth image depth image nChannels image..

iPhone SDK: accessing indexed color PNG images

http://stackoverflow.com/questions/3251595/iphone-sdk-accessing-indexed-color-png-images

NSData file NSFileManager defaultManager contentsAtPath path if file printf file failed n CGDataProviderRef src CGDataProviderCreateWithCFData file if src printf image failed n CGImageRef img CGImageCreateWithPNGDataProvider src NULL NO kCGRenderingIntentDefault..

CGPDFDocumentRef from NSData

http://stackoverflow.com/questions/4875672/cgpdfdocumentref-from-nsdata

CGDataProviderRef provider To create the provider you can use this function CGDataProviderRef CGDataProviderCreateWithCFData CFDataRef data and consider that NSData and CFDataRef are toll free bridged so you can use them interchangeably. So summarizing.. try this NSData data ... my data from SQLite ... CFDataRef myPDFData CFDataRef data CGDataProviderRef provider CGDataProviderCreateWithCFData myPDFData CGPDFDocumentRef pdf CGPDFDocumentCreateWithProvider provider Don't forget to CFRelease all unused data. share..

How to draw a color wheel in objective-c

http://stackoverflow.com/questions/5108921/how-to-draw-a-color-wheel-in-objective-c

0 outH 1.0 outH UIImage createUIImageWithRGBAData CFDataRef data int width int height CGDataProviderRef dataProvider CGDataProviderCreateWithCFData data CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGImageRef imageRef CGImageCreate width height 8 32 width 4..

Can width/height of a powerpoint presentation be calculated on iPad

http://stackoverflow.com/questions/7230660/can-width-height-of-a-powerpoint-presentation-be-calculated-on-ipad

slide Code to do what I need to for a PDF CFDataRef myPDFData CFDataRef presentationContent CGDataProviderRef provider CGDataProviderCreateWithCFData myPDFData CGPDFDocumentRef pdf CGPDFDocumentCreateWithProvider provider CGPDFPageRef page CGPDFDocumentGetPage pdf 1 CGRect..

Dispelling the UIImage imageNamed: FUD

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

CFDataRef imageData CGDataProviderCopyData CGImageGetDataProvider originalImage CGDataProviderRef imageDataProvider CGDataProviderCreateWithCFData imageData CFRelease imageData CGImageRef image CGImageCreate CGImageGetWidth originalImage CGImageGetHeight originalImage..