Lines Matching full:trns
92 /* Handle alpha and tRNS via a background color */
819 * less than 8-bit depth to 8-bit depth, and expand tRNS chunks
838 * convert tRNS to the grayscale/RGB format (16-bit RGB value), or replace
839 * the transparent color with a particular RGB value, or drop tRNS entirely.
848 * to expand only the sample depth but not to expand the tRNS to alpha
880 /* Expand tRNS chunks to alpha channels. */
892 /* Expand to 16-bit channels, expand the tRNS chunk too (because otherwise
1143 /* Invert the alpha channel (in tRNS) unless the pixels are
1200 /* Expand background and tRNS chunks */
1357 /* Kill the tRNS chunk itself too. Prior to 1.5.4 this did not happen
1549 /* We don't get to here unless there is a tRNS chunk with non-opaque
1890 * png_do_expand_palette; if it ever checks the tRNS chunk to see if
