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| author |  commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-09-05 21:54:04 +0000 |
|---|---|---|
| committer | commit-bot@chromium.org <commit-bot@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-09-05 21:54:04 +0000 |
| commit | 4ec4cf93b7822e0000102b165852ad623afcb84e (patch) | |
| tree | 868a31e7e8697776ecd0861ed16b495d49f49d86 /include/core/SkShader.h | |
| parent | 818f73e9cf50c0796900f0fe8c55aa2b4ed80516 (diff) | |
alpha threshold bitmap shader
R=reed@google.com
Author: bsalomon@google.com
Review URL: https://chromiumcodereview.appspot.com/23707019
git-svn-id: http://skia.googlecode.com/svn/trunk@11122 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'include/core/SkShader.h')
| -rw-r--r-- | include/core/SkShader.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/include/core/SkShader.h b/include/core/SkShader.h index e1cab96795..2632830ef0 100644 --- a/include/core/SkShader.h +++ b/include/core/SkShader.h @@ -318,9 +318,11 @@ public: virtual GradientType asAGradient(GradientInfo* info) const; /** - * If the shader subclass has a GrEffect implementation, this installs an effect on the stage. - * The GrContext may be used by the effect to create textures. The GPU device does not call - * setContext. Instead we pass the paint here in case the shader needs paint info. + * If the shader subclass has a GrEffect implementation, this resturns the effect to install. + * The incoming color to the effect has r=g=b=a all extracted from the SkPaint's alpha. + * The output color should be the computed SkShader premul color modulated by the incoming + * color. The GrContext may be used by the effect to create textures. The GPU device does not + * call setContext. Instead we pass the SkPaint here in case the shader needs paint info. */ virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const; |