commit 04a1de5545add49c6e5edc3ebc44877133a3e1f9
author Chris Dalton <csmartdalton@google.com> Wed Mar 14 02:04:09 2018 -0600
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Wed Mar 14 16:38:40 2018 +0000
tree 9f92113056759c6417badef8c94a4cab3f7096ea
parent c2d0dd658bbb8caebf0cc9d5cf4b98b1bda616e7

ccpr: Add an attenuation parameter to triangle corners

Adds an attenuation parameter to corners that corrects the over-coverage
from linear interpolation.

Adds a GM for shared corners that ensures we're doing this right.

Bug: skia:
Change-Id: Iff8bd40554f9fda2e7e03faa3c9fbefe65f27568
Reviewed-on: https://skia-review.googlesource.com/114272
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>

src/gpu/ccpr/GrCCCubicShader.cpp

diff --git a/src/gpu/ccpr/GrCCCubicShader.cpp b/src/gpu/ccpr/GrCCCubicShader.cpp
index 5ae51c7..066f086 100644
--- a/src/gpu/ccpr/GrCCCubicShader.cpp
+++ b/src/gpu/ccpr/GrCCCubicShader.cpp
@@ -79,9 +79,10 @@
 
 void GrCCCubicShader::onEmitVaryings(GrGLSLVaryingHandler* varyingHandler,
                                      GrGLSLVarying::Scope scope, SkString* code,
-                                     const char* position, const char* inputCoverage,
-                                     const char* /*wind*/) {
-    SkASSERT(!inputCoverage);
+                                     const char* position, const char* coverage,
+                                     const char* attenuatedCoverage, const char* /*wind*/) {
+    SkASSERT(!coverage);
+    SkASSERT(!attenuatedCoverage);
 
     fKLMD.reset(kFloat4_GrSLType, scope);
     varyingHandler->addVarying("klmd", &fKLMD);