commit 08f986dde7e9cf7a8a811f8a2cc7c9246692ffdb
author Brian Osman <brianosman@google.com> Wed May 13 17:06:46 2020 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu May 14 20:57:15 2020 +0000
tree bf579cd18dbd1941b25a485eb6ec91897d858abb
parent 568f35f8d9a73afeb1183bedc2188e2385458b25

Added SkSL unpremul intrinsic

Change-Id: I5303f6f5210628a0a5d941b2f4a6376b5e158b60
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289577
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>

src/gpu/effects/GrMatrixConvolutionEffect.cpp

diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.cpp b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
index 8de8dee..ed96861 100644
--- a/src/gpu/effects/GrMatrixConvolutionEffect.cpp
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
@@ -191,7 +191,7 @@
     auto sample = this->invokeChild(0, args, "coord + sourceOffset");
     fragBuilder->codeAppendf("half4 c = %s;", sample.c_str());
     if (!mce.convolveAlpha()) {
-        fragBuilder->codeAppend("c.rgb /= max(c.a, 0.0001);");
+        fragBuilder->codeAppend("c = unpremul(c);");
         fragBuilder->codeAppend("c.rgb = saturate(c.rgb);");
     }
     fragBuilder->codeAppend("sum += c * k;");