commit 8199d94c0812a05320064f5f864b4208ffb25dba
author Greg Daniel <egdaniel@google.com> Tue Mar 14 10:20:24 2017 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Tue Mar 14 17:40:56 2017 +0000
tree 2bc531a8ca3e1dce9da501b8eb8b11b0b74ae749
parent 97eb4feb112967ba7fcb00d6995adda1002873c2

Generaly Fixes to gpu bezier code

BUG=skia:

Change-Id: I2246aa0b2bc3327df42ca30d35020a4b878a819b
Reviewed-on: https://skia-review.googlesource.com/9555
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>

src/gpu/effects/GrBezierEffect.cpp

diff --git a/src/gpu/effects/GrBezierEffect.cpp b/src/gpu/effects/GrBezierEffect.cpp
index 6c01f70..e8476c8 100644
--- a/src/gpu/effects/GrBezierEffect.cpp
+++ b/src/gpu/effects/GrBezierEffect.cpp
@@ -183,7 +183,7 @@
                                      func.c_str(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
             fragBuilder->codeAppendf("%s = %s / %s;",
                                      edgeAlpha.c_str(), func.c_str(), gFM.c_str());
-            fragBuilder->codeAppendf("%s = clamp(1.0 - %s, 0.0, 1.0);",
+            fragBuilder->codeAppendf("%s = clamp(0.5 - %s, 0.0, 1.0);",
                                      edgeAlpha.c_str(), edgeAlpha.c_str());
             // Add line below for smooth cubic ramp
             // fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
@@ -390,7 +390,7 @@
             fragBuilder->codeAppendf("edgeAlpha = (%s.x * %s.x - %s.y);",
                                      v.fsIn(), v.fsIn(), v.fsIn());
             fragBuilder->codeAppend("edgeAlpha = edgeAlpha / sqrt(dot(gF, gF));");
-            fragBuilder->codeAppend("edgeAlpha = clamp(1.0 - edgeAlpha, 0.0, 1.0);");
+            fragBuilder->codeAppend("edgeAlpha = clamp(0.5 - edgeAlpha, 0.0, 1.0);");
             // Add line below for smooth cubic ramp
             // fragBuilder->codeAppend("edgeAlpha = edgeAlpha*edgeAlpha*(3.0-2.0*edgeAlpha);");
             break;
@@ -624,7 +624,7 @@
                                      v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn(), v.fsIn());
             fragBuilder->codeAppendf("%s = %s / %s;",
                                      edgeAlpha.c_str(), func.c_str(), gFM.c_str());
-            fragBuilder->codeAppendf("%s = clamp(1.0 - %s, 0.0, 1.0);",
+            fragBuilder->codeAppendf("%s = clamp(0.5 - %s, 0.0, 1.0);",
                                      edgeAlpha.c_str(), edgeAlpha.c_str());
             // Add line below for smooth cubic ramp
             // fragBuilder->codeAppendf("%s = %s * %s * (3.0 - 2.0 * %s);",