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senorblanco@chromium.orge93e1db2013-12-09 18:31:42 +00001/*
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
14class BitmapSourceGM : public skiagm::GM {
15public:
16 BitmapSourceGM() {
17 }
18
19protected:
20 virtual SkString onShortName() SK_OVERRIDE {
21 return SkString("bitmapsource");
22 }
23
24 void makeBitmap() {
25 fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
26 fBitmap.allocPixels();
27 SkBitmapDevice device(fBitmap);
28 SkCanvas canvas(&device);
29 canvas.clear(0x00000000);
30 SkPaint paint;
31 paint.setAntiAlias(true);
32 paint.setColor(0xFFFFFFFF);
33 paint.setTextSize(SkIntToScalar(96));
34 const char* str = "e";
35 canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
36 }
37
38 virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(500, 150); }
39
40 virtual void onOnceBeforeDraw() SK_OVERRIDE {
41 this->makeBitmap();
42 }
43
44 static void fillRectFiltered(SkCanvas* canvas, const SkRect& clipRect, SkImageFilter* filter) {
45 SkPaint paint;
46 paint.setImageFilter(filter);
47 canvas->save();
48 canvas->clipRect(clipRect);
49 canvas->drawPaint(paint);
50 canvas->restore();
51 }
52
53 virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
54 canvas->clear(0x00000000);
55 {
56 SkRect srcRect = SkRect::MakeXYWH(20, 20, 30, 30);
57 SkRect dstRect = SkRect::MakeXYWH(0, 10, 60, 60);
58 SkRect clipRect = SkRect::MakeXYWH(0, 0, 100, 100);
59 SkRect bounds;
60 fBitmap.getBounds(&bounds);
61 SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
62 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRect(new SkBitmapSource(fBitmap, srcRect, srcRect));
63 SkAutoTUnref<SkImageFilter> bitmapSourceSrcRectDstRect(new SkBitmapSource(fBitmap, srcRect, dstRect));
64 SkAutoTUnref<SkImageFilter> bitmapSourceDstRectOnly(new SkBitmapSource(fBitmap, bounds, dstRect));
65
66 // Draw an unscaled bitmap.
67 fillRectFiltered(canvas, clipRect, bitmapSource);
68 canvas->translate(SkIntToScalar(100), 0);
69
70 // Draw an unscaled subset of the source bitmap (srcRect -> srcRect).
71 fillRectFiltered(canvas, clipRect, bitmapSourceSrcRect);
72 canvas->translate(SkIntToScalar(100), 0);
73
74 // Draw a subset of the bitmap scaled to a destination rect (srcRect -> dstRect).
75 fillRectFiltered(canvas, clipRect, bitmapSourceSrcRectDstRect);
76 canvas->translate(SkIntToScalar(100), 0);
77
78 // Draw the entire bitmap scaled to a destination rect (bounds -> dstRect).
79 fillRectFiltered(canvas, clipRect, bitmapSourceDstRectOnly);
80 canvas->translate(SkIntToScalar(100), 0);
81 }
82 }
83
84private:
85 SkBitmap fBitmap;
86 typedef GM INHERITED;
87};
88
89///////////////////////////////////////////////////////////////////////////////
90
91DEF_GM( return new BitmapSourceGM; )