commit dded69693dd3779f081326cde24c3954505b129d
author vbuzinov <vbuzinov@nvidia.com> Fri Jun 12 08:59:45 2015 -0700
committer Commit bot <commit-bot@chromium.org> Fri Jun 12 08:59:45 2015 -0700
tree 0cfc3a16d31093185082268ab16599edb7c0464f
parent 57856a1f589bea64ed84535efed0668221060f9b

Implement support for mixed sampled render targets

Adds a new FBO type kStencil_MSFBOType that is selected whenever
NV_framebuffer_mixed_samples extension is available.  In this new
FBO type a non-msaa color buffer is created with a multisampled
stencil buffer attachment.

Replaces numSamples() with separate numColorSamples and numStencilSamples
methods in RenderTarget.

In mixed samples mode non-MSAA codepaths are used to draw simple shapes,
while NVPR-rendered paths and text are rendered with a multisampled
stencil.

BUG=skia:3177

Review URL: https://codereview.chromium.org/1001503002