tree d70cd72b103537c691d7919625244d2f82238c65
parent 6634cbb427d97f88b6f719fc34ff9b8dbcf8a1f4
author vbuzinov <vbuzinov@nvidia.com> 1443679326 -0700
committer Commit bot <commit-bot@chromium.org> 1443679326 -0700

Implement stencil clipping in mixed sampled render targets

This change enables multisampled clipping for mixed sampled
render targets.  Previously clipping in mixed samples config
behaved the same as in the gpu config.

In order to retrofit non-MSAA draw methods, programmable sample
locations are used in order to colocate all samples at (0.5, 0.5).
Requires support for NV_sample_locations.

BUG=skia:4399

Review URL: https://codereview.chromium.org/1232103002