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58 lines
1.9 KiB
58 lines
1.9 KiB
4 years ago
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# pngcp.dfa
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# Build time configuration of libpng
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#
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# Author: John Bowler
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# Copyright: (c) John Bowler, 2016
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# Usage rights:
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# To the extent possible under law, the author has waived all copyright and
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# related or neighboring rights to this work. This work is published from:
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# United States.
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#
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# Build libpng with support for pngcp. This means just png_read_png,
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# png_write_png and small number of configuration settings.
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#
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everything = off
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# This option is specific to this configuration; it adds a #define to the
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# generated pnglibconf.h which turns on the (not portable) timing option for
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# pngcp. Note that any option is automatically preceded by PNG_; there is no
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# way round this and this is deliberate.
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option PNGCP_TIMING
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# Because of the everything off above the option must also be turned on. This
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# may not be done in one step because it is safer and avoids mis-spelled options
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# in user .dfa files to error out if an unrecognized option is turned on.
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option PNGCP_TIMING on
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# Options to turn on png_read_png and png_write_png:
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option INFO_IMAGE on
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option SEQUENTIAL_READ on
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option EASY_ACCESS on
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option WRITE on
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option WRITE_16BIT on
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option WRITE_FILTER on
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# pngcp needs this to preserve unknown chunks, switching all these on means that
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# pngcp can work without explicit known chunk reading support
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option UNKNOWN_CHUNKS on
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option SET_UNKNOWN_CHUNKS on
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option HANDLE_AS_UNKNOWN on
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option SAVE_UNKNOWN_CHUNKS on
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option WRITE_UNKNOWN_CHUNKS on
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# pngcp needs this to handle palette files with invalid indices:
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option CHECK_FOR_INVALID_INDEX on
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option GET_PALETTE_MAX on
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# Pre-libpng 1.7 pngcp has to stash text chunks manually, post 1.7 without this
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# text chunks should be handled as unknown ok.
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option TEXT on
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# this is used to turn off limits:
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option USER_LIMITS on
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option SET_USER_LIMITS on
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# these are just required for specific customizations
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option WRITE_CUSTOMIZE_ZTXT_COMPRESSION on
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option WRITE_CUSTOMIZE_COMPRESSION on
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