-- see zlib.h -- */

-- see zlib.h -- */

-- see zlib.h -- */

-- see zlib.h -- */

-- see zlib.h -- */

-- see zlib.h -- */

-- see zlib.h -- */

this looks ugly, that could look like this in source, but highly doubt

=========================================================================== * Initialize the "longest match" routines for a new zlib stream */

NOTE: this function expects the *inverse* of the overall gamma transformation * required. */

We build the 8- or 16-bit gamma tables here. Note that for 16-bit * tables, we don't make a full table if we are reducing to 8-bit in * the future.

This is the check going the other way. The XYZ is modified to normalize it * (another side-effect) and the xy chromaticities are returned. */

Convert the supplied time into an RFC 1123 string suitable for use in * a "Creation Time" or other text-based time string. */

Compare the CRC stored in the PNG file with that calculated by libpng from * the data it has read thus far. */

This function is called when there is a warning, but the library thinks * it can continue anyway. Replacement functions don't have to do anything *

Replace any alpha or transparency with the supplied background color. * "background" is already in the screen gamma, while "background_1" is * at a

Encode the alpha channel to the output gamma (the input channel is always * linear.) Called only with color types that have an alpha channel. Needs

If the bit depth is 8 and the color type is not a palette type expand the * whole row to 16 bits. Has no effect otherwise. */

Expands a palette row to an RGB or RGBA row depending * upon whether you supply trans and num_trans. */

Pack pixels into bytes. Pass the true bit depth in bit_depth. The * row_info bit depth should be 8 (one pixel per byte). The channels * should be

Add filler channel if we have RGB color */