Show perlin issue

src/effects/SkPerlinNoiseShader.cpp

Index: src/effects/SkPerlinNoiseShader.cpp
diff --git a/src/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp
index af51afc0316f8438944239f76fe26f63c4a34904..f2ce67924e5d4109800cfafc6b490f8868caf950 100644
--- a/src/effects/SkPerlinNoiseShader.cpp
+++ b/src/effects/SkPerlinNoiseShader.cpp
@@ -7,6 +7,7 @@
 
 #include "SkDither.h"
 #include "SkPerlinNoiseShader.h"
+#include "SkColorFilter.h"
 #include "SkFlattenableBuffers.h"
 #include "SkShader.h"
 #include "SkUnPreMultiply.h"
@@ -1295,6 +1296,16 @@ void GrGLSimplexNoise::setData(const GrGLUniformManager& uman, const GrDrawEffec
 GrEffectRef* SkPerlinNoiseShader::asNewEffect(GrContext* context, const SkPaint& paint) const {
     SkASSERT(NULL != context);
 
+    if (0 == fNumOctaves) {
+        SkColor clearColor = 0;
+        if (kFractalNoise_Type == fType) {
+            clearColor = SkColorSetARGB(paint.getAlpha() / 2, 127, 127, 127);
+        }
+        SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(

[bsalomon, 2013/11/05 20:30:22]

Ha.. ok.

+                                                clearColor, SkXfermode::kSrc_Mode));
+        return cf->asNewEffect(context);
+    }
+
     // Either we don't stitch tiles, either we have a valid tile size
     SkASSERT(!fStitchTiles || !fTileSize.isEmpty());