start a wrapper for color fonts

gm/colortype.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 "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "../src/fonts/SkGScalerContext.h"
+
+class ColorTypeGM : public skiagm::GM {
+public:
+    ColorTypeGM() {
+        const SkColor colors[] = {
+            SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE,
+            SK_ColorMAGENTA, SK_ColorCYAN, SK_ColorYELLOW
+        };
+        SkShader* s = SkGradientShader::CreateSweep(0,0, colors, NULL,
+                                                    SK_ARRAY_COUNT(colors));
+        SkMatrix local;
+        local.setRotate(180);
+        s->setLocalMatrix(local);
+        
+        SkPaint paint;
+        paint.setAntiAlias(true);
+        paint.setShader(s)->unref();
+        
+        SkAutoTUnref<SkTypeface> orig(SkTypeface::CreateFromName("Times",
+                                                         SkTypeface::kBold));
+        fColorType = SkNEW_ARGS(SkGTypeface, (orig, paint));
+    }
+    
+    virtual ~ColorTypeGM() {
+        fColorType->unref();
+    }
+
+protected:
+    virtual SkString onShortName() SK_OVERRIDE {
+        return SkString("colortype");
+    }
+
+    virtual SkISize onISize() SK_OVERRIDE {
+        return SkISize::Make(640, 480);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkPaint paint;
+        paint.setAntiAlias(true);
+        paint.setTypeface(fColorType);
+        
+        for (int size = 10; size <= 100; size += 10) {
+            paint.setTextSize(size);
+            canvas->translate(0, paint.getFontMetrics(NULL));
+            canvas->drawText("Hamburgefons", 12, 10, 10, paint);
+        }
+    }
+
+    virtual uint32_t onGetFlags() const { return kSkipPipe_Flag; }
+
+private:
+    SkTypeface* fColorType;
+
+    typedef skiagm::GM INHERITED;
+};
+
+DEF_GM( return SkNEW(ColorTypeGM); )