return type is a LodePNG error code*/

color is not allowed to already exist. Index should be >= 0 (it's signed to be compatible with using -1 for "doesn't exist")*/

Return the CRC of the bytes buf[0..len-1].*/

buffer must have at least 4 allocated bytes available*/

level may actually range from [0,10] (10 is a "hidden" max level, where we want a bit more compression and it's fine if throughput to fall off a cliff

you can both convert from vector to buffer&size and vica versa. If you use init_buffer to take over a buffer and size, it is not needed to use cleanup

Returns 32-bit integer value for RGBA color.

Counts amount of colors in the image, up to 257. If transparent_counts_as_one is enabled, any color with alpha channel 0 is treated as a single color

Does squeeze strategy where first block splitting is done, then each block is squeezed. Parameters: see description of the ZopfliDeflate function. */

Return the first attribute in the list.

Calculates the bit lengths for the symbols for dynamic blocks. Chooses bit lengths that give the smallest size of tree encoding + encoding of all the

Gets a score of the length given the distance. Typically, the score of the length is the length itself, but if the distance is very long, decrease the

Appends the symbol statistics from the store. */

Second step for the ...makeFromLengths and ...makeFromFrequencies functions. numcodes, lengths and maxbitlen must already be filled in correctly. retu

Does a single run for ZopfliLZ77Optimal. For good compression, repeated runs with updated statistics should be performed. s: the block state in: the

Change the population counts in a way that the consequent Hufmann tree compression, especially its rle-part will be more likely to compress this data

See QueryIntAttribute()

See QueryIntAttribute()

See QueryIntAttribute()

Given an attribute name, QueryIntAttribute() returns XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion can't be performed, or XML_NO_

See QueryIntAttribute()