evas/scale_sample: fix mask geometry clamping in scale thread
Summary:
the 'y' parameter is not relevant here. this clamping exists solely
to avoid reading outside the bounds of the mask, and 'y' is the scanline
at which to begin the masking
subtracting the mask size here does not make sense: we are attempting to clamp
to the size of the mask in order to avoid buffer over-read, so this means that
we are mapping the maximum y coordinate of the mask (mask_y + mask_h) to be
relative to the clipped y coordinate (dst_clip_y)
Depends on D8838
Reviewers: cedric, segfaultxavi
Reviewed By: segfaultxavi
Subscribers: segfaultxavi, #reviewers, #committers
Tags: #efl_rendering
Differential Revision: https://phab.enlightenment.org/D8839