gpu_tonemapper: Tonemap unaligned width and height of source

GPU tonemapper should tonemap only the source pixels within unaligned
width and height. The aligned width and height of the source buffer
can have padding due to alignment requirements, hence GPU tonemapper
should not tonemap on the aligned width and height of the source.

CRs-Fixed: 2048764
Change-Id: I71e9dcca6da2be9663053adc744f9958cc5c1148
1 file changed