add new perlin noise gm to test localmatrix

gm/perlinnoise.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkPerlinNoiseShader.h"
 
-namespace skiagm {
-
-class PerlinNoiseGM : public GM {
+class PerlinNoiseGM : public skiagm::GM {
 public:
     PerlinNoiseGM() {
         this->setBGColor(0xFF000000);
         fSize = SkISize::Make(80, 80);
     }
 
 protected:
     virtual SkString onShortName() {
         return SkString("perlinnoise");
     }
 
     virtual SkISize onISize() {
-        return make_isize(200, 500);
+        return SkISize::Make(200, 500);
     }
 
     void drawClippedRect(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
         canvas->save();
         canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
                          SkIntToScalar(fSize.width()), SkIntToScalar(fSize.height())));
         SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
                                     SkIntToScalar(fSize.width()),
                                     SkIntToScalar(fSize.height()));
         canvas->drawRect(r, paint);
@@ skipping 41 matching lines @@
              0.1f, 0.1f, 2, 0, false);
         test(canvas, 100, 400, SkPerlinNoiseShader::kFractalNoise_Type,
              0.2f, 0.4f, 5, 0, true);
     }
 
 private:
     typedef GM INHERITED;
     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; )