tree fb5643eea3128cbb5687cf91dc487f79a8b6f49e
parent 1f24cb74f2d7728a9015a921b1ecd225301d5dc3
author John Bowler <jbowler@acm.org> 1362629725 -0600
committer Glenn Randers-Pehrson <glennrp at users.sourceforge.net> 1362629725 -0600

[libpng16] Corrected simplified API default gamma for color-mapped output, added

a flag to change default. In 1.6.0 when the simplified API was used
to produce color-mapped output from an input image with no gamma
information the gamma assumed for the input could be different from
that assumed for non-color-mapped output.  In particular 16-bit depth
input files were assumed to be sRGB encoded, whereas in the 'direct'
case they were assumed to have linear data.  This was an error.  The
fix makes the simplified API treat all input files the same way and
adds a new flag to the png_image::flags member to allow the
application/user to specify that 16-bit files contain sRGB data
rather than the default linear.
Fixed bugs in the pngpixel and makepng test programs.