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paella 2011/08/04
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Efficient method to draw a line with millions of points
I'm writing an audio waveform editor in Cocoa with a wide range of zoom options. At its widest, it shows a waveform for an entire song (~10 million samples in view). At its narrowest, it shows a pixel accurate representation of the sound wave (~1 thousand samples in a view). I want to be able to smoothly transition between these zoom levels. Some commercial editors like Ableton Live seem to do thi
paella 2011/01/31
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Fast and Lean PDF Viewer for iPhone / iPad / iOS - tips and hints?
There has been many Questions recently about drawing PDF's. Yes, you can render PDF's very easily with a UIWebView but this cant give the performance and functionality that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage. Apple even have sample code to show how draw a large PDF in a Zoomable UIScrollview But the same issues keep cropping up. UIImage Me
paella 2010/12/21
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paella 2010/06/29
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