GitLab

crrev.com/c/2069137 added support for visible_rect.
Unfortunately it incorrectly computed the UV translation.

It had two issues:
- It was using right() and bottom() instead of width() and height()
 when scaling the UV translation part.
- It was not scaling the translation part for the input UV.

This produced incorrect UVs when a rect was not in the
origin and/or the input UV were scaled.

This patch fixes the computation using
cc::MathUtil::ScaleRectProportional instead.

  in viz_unittests.

Bug: 1059408, 1057953
Test: TextureDrawQuadTranslatedAndVisibleRectInsetTopLeftAndCustomUV
Change-Id: Id852f3c43167364a001f33de07892905c7d3b768
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2149637
Commit-Queue: Daniele Castagna <dcastagna@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#761038}