New SVG turbulence in Skia

src/effects/SkPerlinNoiseShader.cpp

Index: src/effects/SkPerlinNoiseShader.cpp
===================================================================
--- src/effects/SkPerlinNoiseShader.cpp	(revision 8313)
+++ src/effects/SkPerlinNoiseShader.cpp	(working copy)
@@ -74,8 +74,8 @@
 };
 
 struct SkPerlinNoiseShader::PaintingData {
-    PaintingData(int paintingSeed, const SkISize& tileSize)
-      : fSeed(paintingSeed)
+    PaintingData(const SkISize& tileSize)
+      : fSeed(0)
       , fTileSize(tileSize)
       , fPermutationsBitmap(NULL)
       , fNoiseBitmap(NULL)
@@ -114,11 +114,12 @@
         return result;
     }
 
-    void init()
+    void init(SkScalar seed)
     {
         static const SkScalar gInvBlockSizef = SkScalarInvert(SkIntToScalar(kBlockSize));
 
         // The seed value clamp to the range [1, kRandMaximum - 1].
+        fSeed = SkScalarRoundToInt(seed);
         if (fSeed <= 0) {
             fSeed = -(fSeed % (kRandMaximum - 1)) + 1;
         }
@@ -319,7 +320,7 @@
 
 void SkPerlinNoiseShader::initPaint(PaintingData& paintingData)
 {
-    paintingData.init();
+    paintingData.init(fSeed);
 
     // Set frequencies to original values
     paintingData.fBaseFrequency.set(fBaseFrequencyX, fBaseFrequencyY);
@@ -333,7 +334,7 @@
     fTileSize = tileSize;
 
     if (NULL == fPaintingData) {
-        fPaintingData = SkNEW_ARGS(PaintingData, (SkScalarRoundToInt(fSeed), fTileSize));
+        fPaintingData = SkNEW_ARGS(PaintingData, (fTileSize));
         initPaint(*fPaintingData);
     } else {
         // Set Size
@@ -615,6 +616,7 @@
 
 GrEffectRef* GrPerlinNoiseEffect::TestCreate(SkMWCRandom* random,
                                              GrContext* context,
+                                             const GrDrawTargetCaps&,
                                              GrTexture**) {
     int      numOctaves = random->nextRangeU(2, 10);
     bool     stitchTiles = random->nextBool();