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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 #include "SkRSXform.h"
     12 #include "SkSurface.h"
     13 
     14 static void make_bm(SkBitmap* bm) {
     15     bm->allocN32Pixels(100, 100);
     16     bm->eraseColor(SK_ColorBLUE);
     17 
     18     SkCanvas canvas(*bm);
     19     SkPaint paint;
     20     paint.setAntiAlias(true);
     21     paint.setColor(SK_ColorRED);
     22     canvas.drawCircle(50, 50, 50, paint);
     23 }
     24 
     25 static void draw_1_bitmap(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
     26                          int dx, int dy, sk_sp<SkImageFilter> filter) {
     27     SkAutoCanvasRestore acr(canvas, true);
     28     SkPaint paint;
     29 
     30     SkRect clipR = SkRect::MakeXYWH(SkIntToScalar(dx),
     31                                     SkIntToScalar(dy),
     32                                     SkIntToScalar(bm.width()),
     33                                     SkIntToScalar(bm.height()));
     34 
     35     paint.setImageFilter(std::move(filter));
     36     clipR.inset(5, 5);
     37 
     38     canvas->translate(SkIntToScalar(bm.width() + 20), 0);
     39 
     40     if (doClip) {
     41         canvas->save();
     42         canvas->clipRect(clipR);
     43     }
     44     canvas->drawBitmap(bm, SkIntToScalar(dx), SkIntToScalar(dy), &paint);
     45     if (doClip) {
     46         canvas->restore();
     47     }
     48 }
     49 
     50 /**
     51  *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
     52  */
     53 class SpriteBitmapGM : public skiagm::GM {
     54 public:
     55     SpriteBitmapGM() {}
     56 
     57 protected:
     58 
     59     SkString onShortName() override {
     60         return SkString("spritebitmap");
     61     }
     62 
     63     SkISize onISize() override {
     64         return SkISize::Make(640, 480);
     65     }
     66 
     67     void onDraw(SkCanvas* canvas) override {
     68         SkBitmap bm;
     69         make_bm(&bm);
     70 
     71         int dx = 10;
     72         int dy = 10;
     73 
     74         SkScalar sigma = 8;
     75         sk_sp<SkImageFilter> filter(SkBlurImageFilter::Make(sigma, sigma, nullptr));
     76 
     77         draw_1_bitmap(canvas, bm, false, dx, dy, nullptr);
     78         dy += bm.height() + 20;
     79         draw_1_bitmap(canvas, bm, false, dx, dy, filter);
     80         dy += bm.height() + 20;
     81         draw_1_bitmap(canvas, bm, true, dx, dy, nullptr);
     82         dy += bm.height() + 20;
     83         draw_1_bitmap(canvas, bm, true, dx, dy, filter);
     84     }
     85 
     86 private:
     87     typedef GM INHERITED;
     88 };
     89 DEF_GM( return new SpriteBitmapGM; )
     90