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      1 /*
      2  * Copyright 2013 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "gm.h"
      9 #include "SkCanvas.h"
     10 #include "SkBlurImageFilter.h"
     11 
     12 static void make_bm(SkBitmap* bm) {
     13     bm->setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     14     bm->allocPixels();
     15     bm->eraseColor(SK_ColorBLUE);
     16 
     17     SkCanvas canvas(*bm);
     18     SkPaint paint;
     19     paint.setAntiAlias(true);
     20     paint.setColor(SK_ColorRED);
     21     canvas.drawCircle(50, 50, 50, paint);
     22 }
     23 
     24 static void draw_2_bitmaps(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
     25                            int dx, int dy, SkImageFilter* filter = NULL) {
     26     SkAutoCanvasRestore acr(canvas, true);
     27     SkPaint paint;
     28 
     29     SkRect clipR = SkRect::MakeXYWH(SkIntToScalar(dx),
     30                                     SkIntToScalar(dy),
     31                                     SkIntToScalar(bm.width()),
     32                                     SkIntToScalar(bm.height()));
     33 
     34     paint.setImageFilter(filter);
     35     clipR.inset(5, 5);
     36 
     37     if (doClip) {
     38         canvas->save();
     39         canvas->clipRect(clipR);
     40     }
     41     canvas->drawSprite(bm, dx, dy, &paint);
     42     if (doClip) {
     43         canvas->restore();
     44     }
     45 
     46     canvas->translate(SkIntToScalar(bm.width() + 20), 0);
     47 
     48     if (doClip) {
     49         canvas->save();
     50         canvas->clipRect(clipR);
     51     }
     52     canvas->drawBitmap(bm, SkIntToScalar(dx), SkIntToScalar(dy), &paint);
     53     if (doClip) {
     54         canvas->restore();
     55     }
     56 }
     57 
     58 /**
     59  *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
     60  */
     61 class SpriteBitmapGM : public skiagm::GM {
     62 public:
     63     SpriteBitmapGM() {}
     64 
     65 protected:
     66     virtual SkString onShortName() {
     67         return SkString("spritebitmap");
     68     }
     69 
     70     virtual SkISize onISize() {
     71         return SkISize::Make(640, 480);
     72     }
     73 
     74     virtual void onDraw(SkCanvas* canvas) {
     75         SkBitmap bm;
     76         make_bm(&bm);
     77 
     78         int dx = 10;
     79         int dy = 10;
     80 
     81         SkScalar sigma = 8;
     82         SkAutoTUnref<SkImageFilter> filter(new SkBlurImageFilter(sigma, sigma));
     83 
     84         draw_2_bitmaps(canvas, bm, false, dx, dy);
     85         dy += bm.height() + 20;
     86         draw_2_bitmaps(canvas, bm, false, dx, dy, filter);
     87         dy += bm.height() + 20;
     88         draw_2_bitmaps(canvas, bm, true, dx, dy);
     89         dy += bm.height() + 20;
     90         draw_2_bitmaps(canvas, bm, true, dx, dy, filter);
     91     }
     92 
     93 private:
     94     typedef GM INHERITED;
     95 };
     96 
     97 //////////////////////////////////////////////////////////////////////////////
     98 
     99 DEF_GM( return new SpriteBitmapGM; )
    100