文件操作 - todo.txt
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文件: /usr/share/doc/optipng/todo.txt
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OptiPNG - TO-DO list ==================== - Compression improvements: Use zlib's deflateTune(). Use 7zip's and/or zopfli's powerful deflation engine. - Speed improvements: Avoid repeated filtering when trying a filter value more than once. - Text chunk optimization: Smart selection between tEXt and zTXt. Smart selection between uncompressed iTXt and compressed iTXt. - Improved support for reading external image formats (e.g. compressed TIFF). - More file recovery features. - Input from stdin; output to stdout: cat infile | optipng > outfile optipng -stdout infile > outfile - Optimization of an entire directory, with and without subdirectory recursion: optipng dir/ optipng -recursive dir/ - Support for conversion to a desired bit depth and color type: optipng -b16 -c6 files ... - Support for handling metadata, e.g.: optipng -set tEXt=<keyword>,<text> # add or update chunk optipng -set sRGB=0 # add or update chunk optipng -set image.precision=<n> # set the precision of all samples optipng -set image.alpha.precision=<n> # set the precision of alpha samples optipng -reset image.alpha # make the image fully opaque optipng -strip hIST,sPLT # strip hIST and sPLT optipng -strip all -protect iCCP # strip all metadata except iCCP - Parallelization on multi-processor/multi-core machines: optipng -jobs 4 files ...
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