Lines Matching refs:compression
679 * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or
680 * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the
681 * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag"
682 * which is always 0 or 1, or its "compression method" which is always 0.
686 int compression; /* compression value:
706 /* Supported compression types for text in PNG files (tEXt, and zTXt).
799 /* This is for compression type. PNG 1.0-1.2 only define the single type. */
1090 /* Reset the compression stream */
1567 * libpng and the compression methods used by zlib. These functions are
1570 * expense of compression can modify them. See the compression library
1571 * header file (zlib.h) for an explination of the compression functions.
1616 * improve the compression for a given image.
1651 /* Set the library compression level. Currently, valid values range from
1652 * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
1653 * (0 - no compression, 9 - "maximal" compression). Note that tests have
1654 * shown that zlib compression levels 3-6 usually perform as well as level 9
1656 * these values may not correspond directly to the zlib compression levels.
3069 /* On write emphasise speed over compression; the resultant PNG file will be
