add gm for comparing drawSprite and drawBitmap

git-svn-id: http://skia.googlecode.com/svn/trunk@7235 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 96 insertions, 0 deletions

diff --git a/gm/spritebitmap.cpp b/gm/spritebitmap.cpp
new file mode 100644
index 0000000000..d55d71315e
--- /dev/null
+++ b/gm/spritebitmap.cpp
@@ -0,0 +1,96 @@
+/*
+ * 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 "SkBlurImageFilter.h"
+
+static void make_bm(SkBitmap* bm) {
+    bm->setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
+    bm->allocPixels();
+    bm->eraseColor(SK_ColorBLUE);
+
+    SkCanvas canvas(*bm);
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setColor(SK_ColorRED);
+    canvas.drawCircle(50, 50, 50, paint);
+}
+
+static void draw_2_bitmaps(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
+                           int dx, int dy, SkImageFilter* filter = NULL) {
+    SkAutoCanvasRestore acr(canvas, true);
+    SkPaint paint;
+
+    SkRect clipR = SkRect::MakeXYWH(dx, dy, bm.width(), bm.height());
+
+    paint.setImageFilter(filter);
+    clipR.inset(5, 5);
+
+    if (doClip) {
+        canvas->save();
+        canvas->clipRect(clipR);
+    }
+    canvas->drawSprite(bm, dx, dy, &paint);
+    if (doClip) {
+        canvas->restore();
+    }
+
+    canvas->translate(bm.width() + 20, 0);
+
+    if (doClip) {
+        canvas->save();
+        canvas->clipRect(clipR);
+    }
+    canvas->drawBitmap(bm, dx, dy, &paint);
+    if (doClip) {
+        canvas->restore();
+    }
+}
+
+/**
+ *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
+ */
+class SpriteBitmapGM : public skiagm::GM {
+public:
+    SpriteBitmapGM() {}
+
+protected:
+    virtual SkString onShortName() {
+        return SkString("spritebitmap");
+    }
+
+    virtual SkISize onISize() {
+        return SkISize::Make(640, 480);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        SkBitmap bm;
+        make_bm(&bm);
+
+        int dx = 10;
+        int dy = 10;
+
+        SkScalar sigma = 8;
+        SkAutoTUnref<SkImageFilter> filter(new SkBlurImageFilter(sigma, sigma));
+
+        draw_2_bitmaps(canvas, bm, false, dx, dy);
+        dy += bm.height() + 20;
+        draw_2_bitmaps(canvas, bm, false, dx, dy, filter);
+        dy += bm.height() + 20;
+        draw_2_bitmaps(canvas, bm, true, dx, dy);
+        dy += bm.height() + 20;
+        draw_2_bitmaps(canvas, bm, true, dx, dy, filter);
+    }
+
+private:
+    typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return new SpriteBitmapGM; )