commit df04ce29490a24f9d5b4f5caafd8f6a3368a19e0
author Chris Dalton <csmartdalton@google.com> Wed Mar 07 17:28:07 2018 -0700
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu Mar 08 02:13:50 2018 +0000
tree 8ee3e7c10e544d852456b607d6a6476237083e84
parent 5f20fa2923cdd5c8df36efff2ce7b5bd00c5bbb4

ccpr: Draw curves in a single pass

Throws out the complicated MSAA curve corner shaders, and instead just
ramps coverage to zero at bloat vertices that fall outside the curve.

Updates SampleCCPRGeometry to better visualize this new geometry by
clearing to black and drawing with SkBlendMode::kPlus.

Bug: skia:
Change-Id: Ibe86cbc741d8b015127b10dd43e3b52e7cb35732
Reviewed-on: https://skia-review.googlesource.com/112626
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

src/gpu/ccpr/GrCCTriangleShader.cpp

diff --git a/src/gpu/ccpr/GrCCTriangleShader.cpp b/src/gpu/ccpr/GrCCTriangleShader.cpp
index e086201..8135313 100644
--- a/src/gpu/ccpr/GrCCTriangleShader.cpp
+++ b/src/gpu/ccpr/GrCCTriangleShader.cpp
@@ -22,7 +22,8 @@
     code->appendf("%s = %s * %s;", OutName(fCoverageTimesWind), inputCoverage, wind);
 }
 
-void GrCCTriangleShader::onEmitFragmentCode(GrGLSLFPFragmentBuilder* f,
+void GrCCTriangleShader::onEmitFragmentCode(const GrCCCoverageProcessor&,
+                                            GrGLSLFPFragmentBuilder* f,
                                             const char* outputCoverage) const {
     f->codeAppendf("%s = %s;", outputCoverage, fCoverageTimesWind.fsIn());
 }
@@ -106,7 +107,8 @@
     code->appendf("%s = %s * .5;", OutName(fWindTimesHalf), wind);
 }
 
-void GrCCTriangleCornerShader::onEmitFragmentCode(GrGLSLFPFragmentBuilder* f,
+void GrCCTriangleCornerShader::onEmitFragmentCode(const GrCCCoverageProcessor&,
+                                                  GrGLSLFPFragmentBuilder* f,
                                                   const char* outputCoverage) const {
     // By the time we reach this shader, the pixel is in the following state:
     //