commit 25966f2863c58fb04faa48986150c363d30be6fa
author zmo <zmo@chromium.org> Sat Jun 04 11:47:57 2016
committer Commit bot <commit-bot@chromium.org> Sat Jun 04 11:49:19 2016
tree 63950dbe6792654438ac09316013fc91419a47c3
parent 59fd991c44d867f1121b1a0c1e0aaaad8c440760

Improve CopyTex{Sub}Image2D format validation.

1) Unify the validation code into a helper function.
2) In ES3, for sized formats, the read_format and internal_format's color bits
   have to match exactly.

BUG=429053
TEST=gpu_unittests,webgl{2}_conformance
R=piman@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_optional_gpu_tests_rel;tryserver.chromium.mac:mac_optional_gpu_tests_rel;tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2029803002
Cr-Commit-Position: refs/heads/master@{#397913}