general-purpose util function

Transpose two 4x4 16b matrices horizontally stored in registers.

if there's a pending marker from the entropy stream, return that otherwise, fetch from the stream and get a marker. if there's no marker, return 0xff,

returns 1 if the product is valid, 0 on overflow. negative factors are considered invalid.

Get the specified scan line from the ring buffer.

NOTE (Wassim): for some reaosn VirtualFree was crashing, need to investigate this later

Given two intervals, make 'prev' be the previous one of 'next' in 'manager'.

Main flow

Main flow

Helpers

Helpers

Special case of EncodeImageInternal() for cache-bits=0, histo_bits=31

trivial_at_end is 1 if the two histograms only have one element that is non-zero: both the zero-th one, or both the last one.

Read 16, 24 or 32 bits stored in little-endian order.

Swap two histogram pointers.

Check if given ID corresponds to an image related chunk.

Fun fact: this is the _only_ line where we're actually being lossy and discarding bits.

Function that inserts a value of the second half of the in buffer in between every two char of the first half.

Topmost call

Returns 1 on success.