returns -1 if color not present, its index otherwise*/

LZ77-encode the data. Return value is error code. The input are raw bytes, the output is in the form of unsigned integers with codes representing for

See ensureBits documentation above. This one ensures up to 17 bits */

See ensureBits documentation above. This one ensures up to 32 bits */

get the distance code tree of a deflated block with fixed tree, as specified in the deflate specification*/

get the literal and length code tree of a deflated block with fixed tree, as per the deflate specification*/

same as set but does not delete */

load file into buffer that already has the correct allocated size. Returns error code.*/

allocates palette memory if needed, and initializes all colors to black*/

stats must already have been inited. */

Converts a single rgb color without alpha from one type to another, color bits truncated to their bitdepth. In case of single channel (gray or palette

This returns the description of a numerical error code in English. This is also the documentation of all the error codes. */

returns negative value on error. This should be pure C compatible, so no fstat. */

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

out must be buffer big enough to contain uncompressed IDAT chunk data, and in must contain the full image. return value is error**/

background color chunk (bKGD)*/

international text chunk (iTXt)*/

text chunk (tEXt)*/

compressed text chunk (zTXt)*/

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

search the index in the array, that has the largest value smaller than or equal to the given value, given array must be sorted (if no value is smaller

wpos = pos & (windowsize - 1)*/

write the lz77-encoded data, which has lit, len and dist codes, to compressed stream using huffman trees. tree_ll: the tree for lit and len codes. tre

in: Adam7 interlaced image, with no padding bits between scanlines, but between reduced images so that each reduced image starts at a byte. out: the

in: non-interlaced image with size w*h out: the same pixels, but re-ordered according to PNG's Adam7 interlacing, with no padding bits between scanli

make table for huffman decoding */

This has to be declared outside because of an LCC bug (easy to see with the Princess' Axe)