Write the cHRM chunk */

Free any memory used in png_ptr struct without freeing the struct itself. */

Do the actual writing of a previously filtered row. */

Flush the current output buffers now */

Write a gAMA chunk */

Write the histogram */

Write an iCCP chunk */

Write the oFFs chunk */

Write the pCAL chunk (described in the PNG extensions document) */

Write the pHYs chunk */

Write a few rows of image data. If the image is interlaced, * either you will have to write the 7 sub images, or, if you * have called png_set_inte

Write the sBIT chunk */

Write the sCAL chunk */

Write a sPLT chunk */

Write a sRGB chunk */

Initializes the row writing capability of libpng */

Write the tRNS chunk */

Function to free memory for zlib */

* Reads an array of sample bytes from a raw PNM file stream. * Multi-byte samples are stored in network order, as in the PNM stream. * The byte coun

* Reads a PNM header structure from a file stream and validates it. * Returns 1 on success, 0 on validation failure, * or -1 on input or matching fa

* Reads an array of PNM sample values from a file stream. * The values are expected to be in the format specified by pnm_ptr->format. * The array le

out must be buffer big enough to contain full image, and in must contain the full decompressed data from the IDAT chunks (with filter index bytes and

Finds which channels need to be sorted first and preproceses achv for fast sort */

background color chunk (bKGD)*/

international text chunk (iTXt)*/

text chunk (tEXt)*/

compressed text chunk (zTXt)*/

=========================================================================== * Read a new buffer from the current input stream, update the adler32 *

Uses edge/noise map to apply dithering only to flat areas. Dithering on edges creates jagged lines, and noisy areas are "naturally" dithered. If ou

fixed colors are always included in the palette, so it would be wasteful to duplicate them in palette from histogram */

put a pixel, given its RGBA16 color, into image of any color 16-bitdepth type*/

put a pixel, given its RGBA color, into image of any color type*/

write given buffer to the file, overwriting the file, it doesn't append to it.*/

=========================================================================== * Send the header for a block using dynamic Huffman trees: the counts, th

Set this point to some specified coordinates.

=========================================================================== * Initialize the various 'constant' tables. */

resize and give all new elements the value*/