commit d1bc240f159e5892d74b266ecad685bd5cbc1299
author Brian Salomon <bsalomon@google.com> Wed Jun 05 11:47:50 2019 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Wed Jun 05 17:15:04 2019 +0000
tree a47bb6f244a50a66364e9c998c1ed5b2ab8015c1
parent 6565506463db042d3d543a1707f473cdf1ef4e9e

Use 1e-4 rather than 1e-5 as "nonZeroAlpha" in various shader code.

1e-5 may be zero in fp16.


Bug: skia:9099
Change-Id: I28a518f5cf1aa7926f7422625c0f14ed1a082809
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/218558
Commit-Queue: Brian Salomon <bsalomon@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>

src/gpu/glsl/GrGLSLShaderBuilder.cpp

diff --git a/src/gpu/glsl/GrGLSLShaderBuilder.cpp b/src/gpu/glsl/GrGLSLShaderBuilder.cpp
index 09f5d5d..a8d7812 100644
--- a/src/gpu/glsl/GrGLSLShaderBuilder.cpp
+++ b/src/gpu/glsl/GrGLSLShaderBuilder.cpp
@@ -158,7 +158,7 @@
         const GrShaderVar gColorXformArgs[] = { GrShaderVar("color", kHalf4_GrSLType) };
         SkString body;
         if (colorXformHelper->applyUnpremul()) {
-            body.append("half nonZeroAlpha = max(color.a, 0.00001);");
+            body.append("half nonZeroAlpha = max(color.a, 0.0001);");
             body.append("color = half4(color.rgb / nonZeroAlpha, nonZeroAlpha);");
         }
         if (colorXformHelper->applySrcTF()) {