this is a special function used inside malloc wrapper to do allocations that aren't tracked (to avoid reentrancy). Of course if someone _else_ wraps r

perform a safe strcat of 3 strings, given that we can't rely on portable snprintf if you need to break on error, this is the best place to place a bre

avoid dependency on sprintf()

delete characters while updating undo

delete characters while updating undo

randomly choose a tile that fits constraints for a given spot, and update the constraints

clean up the temporary component buffers

combined JPEG 'receive' and JPEG 'extend', since baseline always extends everything it receives.

combined JPEG 'receive' and JPEG 'extend', since baseline always extends everything it receives.

returns 0..31 for the highest set bit

returns 0..31 for the highest set bit

mallocs with size overflow checking

extract an arbitrarily-aligned N-bit value (N=bits) from v, and then make it 8-bits long and fractionally extend it to full full range.

initialize a memory-decode context

initialize a callback-based context

returns STBI_rgb or whatever, 0 on error

returns STBI_rgb or whatever, 0 on error

This is the maximum number of input samples that can affect an output sample with the given filter

compute the result of pasting into a tile non-destructively so we can preview it