commit 27b6335c71bccb96206ff0495793433bfa982777
author egdaniel <egdaniel@google.com> Tue Sep 15 13:13:50 2015 -0700
committer Commit bot <commit-bot@chromium.org> Tue Sep 15 13:13:50 2015 -0700
tree 750282c33f8c895c0282bee6393943efbee51c60
parent fb1e2fc8aa25b8c2ef0714c27cfcb1ee0f8f806b

On gpu, use max(r,g,b) for coverage alpha in LCD and update lcd blend gm.

BUG=skia:

Review URL: https://codereview.chromium.org/1339213004

src/gpu/effects/GrBitmapTextGeoProc.cpp

diff --git a/src/gpu/effects/GrBitmapTextGeoProc.cpp b/src/gpu/effects/GrBitmapTextGeoProc.cpp
index e8bcd57..c866ae6 100644
--- a/src/gpu/effects/GrBitmapTextGeoProc.cpp
+++ b/src/gpu/effects/GrBitmapTextGeoProc.cpp
@@ -69,6 +69,12 @@
             fsBuilder->codeAppendf("%s = ", args.fOutputCoverage);
             fsBuilder->appendTextureLookup(args.fSamplers[0], v.fsIn(), kVec2f_GrSLType);
             fsBuilder->codeAppend(";");
+            if (cte.maskFormat() == kA565_GrMaskFormat) {
+                // set alpha to be max of rgb coverage
+                fsBuilder->codeAppendf("%s.a = max(max(%s.r, %s.g), %s.b);",
+                                       args.fOutputCoverage, args.fOutputCoverage,
+                                       args.fOutputCoverage, args.fOutputCoverage);
+            }
         }
     }