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