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2014/10/15 ¤U¤È 10:12:48
iphone Programming Glossary: pngcrushhttp://stackoverflow.com/questions/13679710/not-a-png-filcommand-copypng-emitted-errors-but-did-not-return-a-nonzero-exit-co return a nonzero exit code to indicate failure null While reading Users user Desktop Demo PhotoBrowserDemo Default.png pngcrush caught libpng error null Could not find file Users user Library Developer Xcode DerivedData RImageGallery cmwaittvclhwgxfpcoarddipyliv..
Skipping the 'CompressResources' build step for XCode iPhone apps http://stackoverflow.com/questions/177160/skipping-the-compressresources-build-step-for-xcode-iphone-apps an iPhone XCode project to skip the 'CompressResources' build step Specifically I want to skip the stage where it runs pngcrush on all of my .png files many of which don't survive the experience in a form which my app can read. Edit the version of.. all of my .png files many of which don't survive the experience in a form which my app can read. Edit the version of pngcrush used creates png files which contain a non standard 'mandatory private' chunk which explicitly prevents decoding. I've modified.. to handle these files but I'd still like a per project method of skipping this step. One of the other side effects of pngcrush is that it doesn't save the colour value of transparent pixels so alpha ed textures show fringing at smaller mip levels...
Batch optimization of PNGs for iphone/ipad display as xcode does http://stackoverflow.com/questions/4584467/batch-optimization-of-pngs-for-iphone-ipad-display-as-xcode-does iPhoneOS.platform Developer usr bin iphoneos optimize It appears that the above command uses a modified version of pngcrush to optimize pngs and transform the color channels Developer Platforms iPhoneOS.platform Developer usr bin pngcrush iphone.. of pngcrush to optimize pngs and transform the color channels Developer Platforms iPhoneOS.platform Developer usr bin pngcrush iphone f 0 orig.png optimized.png And the optimization is really helpful. I've got 5 time faster image loading share improve..
Performing iPhone optimization on externally downloaded PNGs http://stackoverflow.com/questions/640909/performing-iphone-optimization-on-externally-downloaded-pngs on externally downloaded PNGs When a PNG is added to an XCode iPhone project the compiler optimizes it using pngcrush. Once on the device the image's rendering performance is very fast. My problem is that my application downloads its PNGs.. an externally downloaded PNG at runtime on the iPhone I'm hoping for a class that does this. I even considered adding pngcrush's source code to my app which seems drastic. I haven't been able to find an decent answer myself. I'd be very grateful for.. and the downloaded version of exactly the same PNG. The only difference is that the embedded one was optimized by 'pngcrush' during compilation. This does some byte swapping from RGBA to BRGA and pre multiplication of alpha. http iphonedevelopment.blogspot.com..
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