Lines Matching refs:compression
640 * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or
641 * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the
642 * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag"
643 * which is always 0 or 1, or its "compression method" which is always 0.
647 int compression; /* compression value:
667 /* Supported compression types for text in PNG files (tEXt, and zTXt).
764 /* This is for compression
1060 /* Reset the compression stream */
1605 * libpng and the compression methods used by zlib. These functions are
1608 * expense of compression can modify them. See the compression library
1609 * header file (zlib.h) for an explination of the compression functions.
1654 * improve the compression for a given image.
1689 /* Set the library compression level. Currently, valid values range from
1690 * 0 - 9, corresponding directly to the zlib compression levels 0 - 9
1691 * (0 - no compression, 9 - "maximal" compression). Note that tests have
1692 * shown that zlib compression levels 3-6 usually perform as well as level 9
1694 * these values may not correspond directly to the zlib compression levels.
