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1.单独构建zlib,然后构建png_shard,最后构建png1Test 2.cmake构建完后请把cmake-build-debug/output里的libpng.dll,libpng16d.dll,libzlib.dll拷贝到cmake-build-debug目录下 3.终端输入 .\cmake-build-debug\png1test.exe 1 1 .\aaanosrgb32embbed.png

代码源自libpng的example,仅增加了png_get_gAMA和png_get_sRGB读取(但是没读出来任何值)。

aaa开头的图片是在线性工作空间下(ps-颜色管理-工作空间0灰度系数为1)制作的,bbb则是在sRGB空间下制作。

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test png and photoshop's settings

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