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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 | |
10 #include "SkBitmapSource.h" | |
11 | |
12 // This GM exercises the SkBitmapSource ImageFilter class. | |
13 | |
14 class BitmapSourceGM : public skiagm::GM { | |
15 public: | |
16 BitmapSourceGM() { | |
17 } | |
18 | |
19 protected: | |
20 SkString onShortName() override { | |
21 return SkString("bitmapsource"); | |
22 } | |
23 | |
24 SkISize onISize() override { return SkISize::Make(500, 150); } | |
25 | |
26 void onOnceBeforeDraw() override { | |
27 fBitmap = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20,
70, 96, "e"); | |
28 } | |
29 | |
30 static void FillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkIma
geFilter* filter) { | |
31 SkPaint paint; | |
32 paint.setImageFilter(filter); | |
33 canvas->save(); | |
34 canvas->clipRect(clipRect); | |
35 canvas->drawPaint(paint); | |
36 canvas->restore(); | |
37 } | |
38 | |
39 void onDraw(SkCanvas* canvas) override { | |
40 canvas->clear(SK_ColorBLACK); | |
41 { | |
42 SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30); | |
43 SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60); | |
44 SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100); | |
45 SkRect bounds; | |
46 fBitmap.getBounds(&bounds); | |
47 SkAutoTUnref<SkImageFilter> bitmapSource(SkBitmapSource::Create(fBit
map)); | |
48 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(SkBitmapSource::Crea
te(fBitmap, srcRect, srcRect)); | |
49 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(SkBitmapSourc
e::Create(fBitmap, srcRect, dstRect)); | |
50 SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(SkBitmapSource::
Create(fBitmap, bounds, dstRect)); | |
51 | |
52 // Draw an unscaled bitmap. | |
53 FillRectFiltered(canvas, clipRect, bitmapSource); | |
54 canvas->translate(SkIntToScalar(100), 0); | |
55 | |
56 // Draw an unscaled subset of the source bitmap (srcRect -> srcRect)
. | |
57 FillRectFiltered(canvas, clipRect, bitmapSourceSrcRect); | |
58 canvas->translate(SkIntToScalar(100), 0); | |
59 | |
60 // Draw a subset of the bitmap scaled to a destination rect (srcRect
-> dstRect). | |
61 FillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect); | |
62 canvas->translate(SkIntToScalar(100), 0); | |
63 | |
64 // Draw the entire bitmap scaled to a destination rect (bounds -> ds
tRect). | |
65 FillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly); | |
66 canvas->translate(SkIntToScalar(100), 0); | |
67 } | |
68 } | |
69 | |
70 private: | |
71 SkBitmap fBitmap; | |
72 typedef GM INHERITED; | |
73 }; | |
74 | |
75 /////////////////////////////////////////////////////////////////////////////// | |
76 | |
77 DEF_GM( return new BitmapSourceGM; ) | |
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