iphone Programming Glossary: uigraphicspopcontext
Flipped NSString drawing in CGContext http://stackoverflow.com/questions/1252343/flipped-nsstring-drawing-in-cgcontext font UIFont fontWithName @ Arial size 12 CGContextSetRGBFillColor context 0 1 0 1 s drawAtPoint points 0 withFont font UIGraphicsPopContext The transformation matrix seems the Identity matrix... no CGAffineTransform is applied to THIS context. If the string is..
Detect touches only on non-transparent pixels of UIImageView, efficiently http://stackoverflow.com/questions/13291919/detect-touches-only-on-non-transparent-pixels-of-uiimageview-efficiently pixel 1 1 8 1 NULL kCGImageAlphaOnly UIGraphicsPushContext context image drawAtPoint CGPointMake point.x point.y UIGraphicsPopContext CGContextRelease context CGFloat alpha pixel 0 255.0f BOOL transparent alpha 0.01f return transparent This assumes that..
PDF generation using data http://stackoverflow.com/questions/1864597/pdf-generation-using-data pdfContext mediaBox Your Quartz drawing code goes here CGContextEndPage pdfContext CGPDFContextClose pdfContext UIGraphicsPopContext CGContextRelease pdfContext CGDataConsumerRelease dataConsumer You can then save this PDF data to disk or add it as an attachment..
iphone uiview circle? http://stackoverflow.com/questions/2083056/iphone-uiview-circle
Add text to CALayer http://stackoverflow.com/questions/2209734/add-text-to-calayer
What's the correct code to save a CGLayer as a PNG file? http://stackoverflow.com/questions/4064470/whats-the-correct-code-to-save-a-cglayer-as-a-png-file b controlPoint2 c longPath addCurveToPoint m controlPoint1 n controlPoint2 o longPath closePath longPath stroke UIGraphicsPopContext so now you have a nice CGLayer. how to save it to a file you can save it to a file using the amazing KENNY TM METHOD UIGraphicsBeginImageContext..
iPhone Glossy Icons Using Core Graphics http://stackoverflow.com/questions/5541457/iphone-glossy-icons-using-core-graphics rgbColorspace components locations 2 CGContextDrawLinearGradient context glossGradient topCenter midCenter 0 UIGraphicsPopContext newImage UIGraphicsGetImageFromCurrentImageContext CGGradientRelease glossGradient CGColorSpaceRelease rgbColorspace UIGraphicsEndImageContext..
Draw another image on a UIImage http://stackoverflow.com/questions/6656745/draw-another-image-on-a-uiimage this example draws the inputImage into the context inputImage drawInRect CGRectMake 0 0 width height pop context UIGraphicsPopContext get a UIImage from the image context enjoy UIImage outputImage UIGraphicsGetImageFromCurrentImageContext clean up drawing..
Draw text in circle overlay http://stackoverflow.com/questions/7825220/draw-text-in-circle-overlay @ Arial size 10.0 lineBreakMode UILineBreakModeClip alignment UITextAlignmentCenter CGContextRestoreGState context UIGraphicsPopContext When debugging I get values like these MKC 43253760.000000 104071168.000000 1.776503 1.999245 MKC 43253760.000000 104071168.000000..
iOS - How to achieve emboss effect for the text on UILabel? http://stackoverflow.com/questions/8467141/ios-how-to-achieve-emboss-effect-for-the-text-on-uilabel CGColorSpaceRelease grayscale UIGraphicsPushContext gc UIColor whiteColor setFill string drawInRect rect withFont font UIGraphicsPopContext CGImageRef cgImage CGBitmapContextCreateImage gc CGContextRelease gc UIImage image UIImage imageWithCGImage cgImage scale..
Draw glow around inside edge of multiple CGPaths http://stackoverflow.com/questions/8480401/draw-glow-around-inside-edge-of-multiple-cgpaths and objects. Remember that you can always make UIKit draw to an arbitrary CGContext using UIGraphicsPushContext and UIGraphicsPopContext . First we need an mask image. It should be an alpha channel only image that is 1 inside any of the paths and 0 outside..
UIView: how to do non-destructive drawing? http://stackoverflow.com/questions/865636/uiview-how-to-do-non-destructive-drawing CGImageRef cgImage CGBitmapContextCreateImage drawingContext UIImage uiImage UIImage alloc initWithCGImage cgImage UIGraphicsPopContext CGImageRelease cgImage uiImage drawInRect rect uiImage release TODO can anyone optimize the drawRect so that only the usually..
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