add new perlin noise gm to test localmatrix

BUG=skia:

Review URL: https://codereview.chromium.org/283533002

git-svn-id: http://skia.googlecode.com/svn/trunk@14698 2bbb7eff-a529-9590-31e7-b0007b416f81

gm/perlinnoise.cpp

@@ -8,9 +8,7 @@
 #include "gm.h"
 #include "SkPerlinNoiseShader.h"
 
-namespace skiagm {
-
-class PerlinNoiseGM : public GM {
+class PerlinNoiseGM : public skiagm::GM {
 public:
     PerlinNoiseGM() {
         this->setBGColor(0xFF000000);
@@ -23,7 +21,7 @@ protected:
     }
 
     virtual SkISize onISize() {
-        return make_isize(200, 500);
+        return SkISize::Make(200, 500);
     }
 
     void drawClippedRect(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
@@ -85,9 +83,89 @@ private:
     SkISize fSize;
 };
 
+class PerlinNoiseGM2 : public skiagm::GM {
+public:
+    PerlinNoiseGM2() {
+        fSize = SkISize::Make(80, 80);
+    }
+    
+protected:
+    virtual SkString onShortName() {
+        return SkString("perlinnoise_localmatrix");
+    }
+    
+    virtual SkISize onISize() {
+        return SkISize::Make(640, 480);
+    }
+    
+    void install(SkPaint* paint, SkPerlinNoiseShader::Type type,
+              float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed,
+              bool stitchTiles) {
+        SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
+        SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
+                                                seed, stitchTiles ? &fSize : NULL) :
+        SkPerlinNoiseShader::CreateTurbulence(baseFrequencyX, baseFrequencyY, numOctaves,
+                                              seed, stitchTiles ? &fSize : NULL);
+        paint->setShader(shader)->unref();
+    }
+    
+    virtual void onDraw(SkCanvas* canvas) {
+        canvas->translate(10, 10);
+
+        SkPaint paint;
+        install(&paint, SkPerlinNoiseShader::kFractalNoise_Type, 0.1f, 0.1f, 2, 0, false);
+
+        const SkScalar w = SkIntToScalar(fSize.width());
+        const SkScalar h = SkIntToScalar(fSize.height());
+
+        SkRect r = SkRect::MakeWH(w, h);
+        canvas->drawRect(r, paint);
+
+        canvas->save();
+        canvas->translate(w * 5/4, 0);
+        canvas->drawRect(r, paint);
+        canvas->restore();
+
+        canvas->save();
+        canvas->translate(0, h + 10);
+        canvas->scale(2, 2);
+        canvas->drawRect(r, paint);
+        canvas->restore();
+        
+        canvas->save();
+        canvas->translate(w + 100, h + 10);
+        canvas->scale(2, 2);
+        canvas->drawRect(r, paint);
+        canvas->restore();
+
+        // The next row should draw the same as the previous, even though we are using a local
+        // matrix instead of the canvas.
+
+        canvas->translate(0, h * 2 + 10);
+
+        SkMatrix lm;
+        lm.setScale(2, 2);
+        paint.getShader()->setLocalMatrix(lm);
+        r.fRight += r.width();
+        r.fBottom += r.height();
+
+        canvas->save();
+        canvas->translate(0, h + 10);
+        canvas->drawRect(r, paint);
+        canvas->restore();
+        
+        canvas->save();
+        canvas->translate(w + 100, h + 10);
+        canvas->drawRect(r, paint);
+        canvas->restore();
+    }
+    
+private:
+    typedef GM INHERITED;
+    SkISize fSize;
+};
+
 //////////////////////////////////////////////////////////////////////////////
 
-static GM* MyFactory(void*) { return new PerlinNoiseGM; }
-static GMRegistry reg(MyFactory);
-
-}
+DEF_GM( return new PerlinNoiseGM; )
+DEF_GM( return new PerlinNoiseGM2; )