add matrix options to drawDrawable

gm/drawable.cpp

 /*
  * Copyright 2015 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 "SkDrawable.h"
 
 struct MyDrawable : public SkDrawable {
-    SkRect onGetBounds() override {
-        return SkRect::MakeWH(640, 480);
-    }
+    SkRect onGetBounds() override { return SkRect::MakeWH(50, 100);  }
 
     void onDraw(SkCanvas* canvas) override {
        SkPath path;
        path.moveTo(10, 10);
        path.conicTo(10, 90, 50, 90, 0.9f);
 
        SkPaint paint;
        paint.setColor(SK_ColorBLUE);
        canvas->drawRect(path.getBounds(), paint);
 
        paint.setAntiAlias(true);
        paint.setColor(SK_ColorWHITE);
        canvas->drawPath(path, paint);
     }
 };
 
-DEF_SIMPLE_GM(Drawables, canvas, 640, 480) {
-    SkAutoTUnref<SkDrawable> d(new MyDrawable);
-    canvas->drawDrawable(d);
+/*
+ *  Test calling drawables w/ translate and matrices
+ */
+DEF_SIMPLE_GM(drawable, canvas, 180, 275) {
+    SkAutoTUnref<SkDrawable> drawable(new MyDrawable);
+
+    canvas->translate(10, 10);
+    canvas->drawDrawable(drawable);
+    canvas->drawDrawable(drawable, 0, 150);
+
+    SkMatrix m = SkMatrix::MakeScale(1.5f, 0.8f);
+    m.postTranslate(70, 0);
+    canvas->drawDrawable(drawable, &m);
+
+    m.postTranslate(0, 150);
+    canvas->drawDrawable(drawable, &m);
 }