Return 1 if got a frame; 0 if got GIF trailer; -1 if error. */

TODO: deal with partial inverse DCT for a 1:2 and 1:4 scale decode (it currently produces a 1:1 image)

Permutation is a special transform since it has to be done on the channel metadata as soon as possible if it has no parameters

simple upscaling; TODO: fancy upscaling

Computes an approximation of log(4096 / x) / log(2) * base */

Read image. * Return 0 on success or -1 on out-of-memory (w.r.t. LZW code table). */

Decompress image pixels. * Return 0 on success or -1 on out-of-memory (w.r.t. LZW code table). */

inline int rounded_div(const int n, const int d) { return ((n < 0) ^ (d < 0)) ? ((n - d/2)/d) : ((n + d/2)/d); }

[squeezetype] [beginc] [endc]

this channel contains (some) data of this component (-1 = bug/unknown)

prevent copy

FinalCompoundSymbolChances() { }

PropertyDecisionNode(int p=-1, int s=0, int c=0) : property(p), count(0), splitval(s), childID(c), leafID(0) {}