Deprecated

tile height size

tile width size

Converts symbol to lower case, if it is an ASCII one

Try to acquire the lock. Return true if we have it, false if somebody else is holding the lock.

Unlock the bin we point to, if locked.

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Writes PNG header according to the ImageSpec.

Writes a scanline.

Relative filename, not yet found -- try each directory in turn

Fast (int)ceil(val) See Michael Herf's "Know Your FPU" page: http://www.stereopsis.com/sree/fpu2006.html

check the coordinates that x1 < x2 and y1 < y2

Get the raw message digest

Tests ImageBuf construction from application buffer

Table initializations. */

minimal header reading. modify if you want to parse more information */

default minimal header. modify if you want more information in header */

Utility -- convert Rec709 value to linear http://en.wikipedia.org/wiki/Rec._709