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
make_bm(SkBitmap * bm)12 static 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
draw_2_bitmaps(SkCanvas * canvas,const SkBitmap & bm,bool doClip,int dx,int dy,SkImageFilter * filter=NULL)23 static 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 */
60 class SpriteBitmapGM : public skiagm::GM {
61 public:
SpriteBitmapGM()62 SpriteBitmapGM() {}
63
64 protected:
65
onShortName()66 SkString onShortName() override {
67 return SkString("spritebitmap");
68 }
69
onISize()70 SkISize onISize() override {
71 return SkISize::Make(640, 480);
72 }
73
onDraw(SkCanvas * canvas)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
93 private:
94 typedef GM INHERITED;
95 };
96
97 //////////////////////////////////////////////////////////////////////////////
98
99 DEF_GM( return new SpriteBitmapGM; )
100