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
12static void make_bm(SkBitmap* bm) {
13    bm->allocN32Pixels(100, 100);
14    bm->eraseColor(SK_ColorBLUE);
15
16    SkCanvas canvas(*bm);
17    SkPaint paint;
18    paint.setAntiAlias(true);
19    paint.setColor(SK_ColorRED);
20    canvas.drawCircle(50, 50, 50, paint);
21}
22
23static void draw_2_bitmaps(SkCanvas* canvas, const SkBitmap& bm, bool doClip,
24                           int dx, int dy, SkImageFilter* filter = NULL) {
25    SkAutoCanvasRestore acr(canvas, true);
26    SkPaint paint;
27
28    SkRect clipR = SkRect::MakeXYWH(SkIntToScalar(dx),
29                                    SkIntToScalar(dy),
30                                    SkIntToScalar(bm.width()),
31                                    SkIntToScalar(bm.height()));
32
33    paint.setImageFilter(filter);
34    clipR.inset(5, 5);
35
36    if (doClip) {
37        canvas->save();
38        canvas->clipRect(clipR);
39    }
40    canvas->drawSprite(bm, dx, dy, &paint);
41    if (doClip) {
42        canvas->restore();
43    }
44
45    canvas->translate(SkIntToScalar(bm.width() + 20), 0);
46
47    if (doClip) {
48        canvas->save();
49        canvas->clipRect(clipR);
50    }
51    canvas->drawBitmap(bm, SkIntToScalar(dx), SkIntToScalar(dy), &paint);
52    if (doClip) {
53        canvas->restore();
54    }
55}
56
57/**
58 *  Compare output of drawSprite and drawBitmap (esp. clipping and imagefilters)
59 */
60class SpriteBitmapGM : public skiagm::GM {
61public:
62    SpriteBitmapGM() {}
63
64protected:
65
66    SkString onShortName() override {
67        return SkString("spritebitmap");
68    }
69
70    SkISize onISize() override {
71        return SkISize::Make(640, 480);
72    }
73
74    void onDraw(SkCanvas* canvas) override {
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(SkBlurImageFilter::Create(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
93private:
94    typedef GM INHERITED;
95};
96
97//////////////////////////////////////////////////////////////////////////////
98
99DEF_GM( return new SpriteBitmapGM; )
100