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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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkImageFilter.h"
13 #include "include/core/SkPaint.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkRefCnt.h"
16 #include "include/core/SkScalar.h"
17 #include "include/core/SkSize.h"
18 #include "include/core/SkString.h"
19 #include "include/effects/SkImageFilters.h"
20 
21 #include <utility>
22 
make_bm(SkBitmap * bm)23 static void make_bm(SkBitmap* bm) {
24     bm->allocN32Pixels(100, 100);
25     bm->eraseColor(SK_ColorBLUE);
26 
27     SkCanvas canvas(*bm);
28     SkPaint paint;
29     paint.setAntiAlias(true);
30     paint.setColor(SK_ColorRED);
31     canvas.drawCircle(50, 50, 50, paint);
32 }
33 
draw_1_bitmap(SkCanvas * canvas,const SkBitmap & bm,bool doClip,int dx,int dy,sk_sp<SkImageFilter> filter)34 static void draw_1_bitmap(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
35                          int dx, int dy, sk_sp<SkImageFilter> filter) {
36     SkAutoCanvasRestore acr(canvas, true);
37     SkPaint paint;
38 
39     SkRect clipR = SkRect::MakeXYWH(SkIntToScalar(dx),
40                                     SkIntToScalar(dy),
41                                     SkIntToScalar(bm.width()),
42                                     SkIntToScalar(bm.height()));
43 
44     paint.setImageFilter(std::move(filter));
45     clipR.inset(5, 5);
46 
47     canvas->translate(SkIntToScalar(bm.width() + 20), 0);
48 
49     if (doClip) {
50         canvas->save();
51         canvas->clipRect(clipR);
52     }
53     canvas->drawBitmap(bm, SkIntToScalar(dx), SkIntToScalar(dy), &paint);
54     if (doClip) {
55         canvas->restore();
56     }
57 }
58 
59 /**
60  *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
61  */
62 class SpriteBitmapGM : public skiagm::GM {
63 public:
SpriteBitmapGM()64     SpriteBitmapGM() {}
65 
66 protected:
67 
onShortName()68     SkString onShortName() override {
69         return SkString("spritebitmap");
70     }
71 
onISize()72     SkISize onISize() override {
73         return SkISize::Make(640, 480);
74     }
75 
onDraw(SkCanvas * canvas)76     void onDraw(SkCanvas* canvas) override {
77         SkBitmap bm;
78         make_bm(&bm);
79 
80         int dx = 10;
81         int dy = 10;
82 
83         SkScalar sigma = 8;
84         sk_sp<SkImageFilter> filter(SkImageFilters::Blur(sigma, sigma, nullptr));
85 
86         draw_1_bitmap(canvas, bm, false, dx, dy, nullptr);
87         dy += bm.height() + 20;
88         draw_1_bitmap(canvas, bm, false, dx, dy, filter);
89         dy += bm.height() + 20;
90         draw_1_bitmap(canvas, bm, true, dx, dy, nullptr);
91         dy += bm.height() + 20;
92         draw_1_bitmap(canvas, bm, true, dx, dy, filter);
93     }
94 
95 private:
96     typedef GM INHERITED;
97 };
98 DEF_GM( return new SpriteBitmapGM; )
99