1 /*
2 * Copyright 2014 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 "SkColor.h"
10 #include "SkImageFilter.h"
11
12 namespace skiagm {
13
14 class MatrixImageFilterGM : public GM {
15 public:
MatrixImageFilterGM()16 MatrixImageFilterGM() {
17 this->setBGColor(0x00000000);
18 }
19
20 protected:
onShortName()21 virtual SkString onShortName() {
22 return SkString("matriximagefilter");
23 }
24
draw(SkCanvas * canvas,const SkRect & rect,const SkBitmap & bitmap,const SkMatrix & matrix,SkFilterQuality filter)25 void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap,
26 const SkMatrix& matrix, SkFilterQuality filter) {
27 SkAutoTUnref<SkImageFilter> imageFilter(
28 SkImageFilter::CreateMatrixFilter(matrix, filter));
29 SkPaint paint;
30 paint.setImageFilter(imageFilter.get());
31 canvas->saveLayer(&rect, &paint);
32 canvas->drawBitmap(bitmap, 0, 0);
33 canvas->restore();
34 }
35
onISize()36 virtual SkISize onISize() {
37 return SkISize::Make(420, 100);
38 }
39
make_checkerboard(SkBitmap * bitmap)40 void make_checkerboard(SkBitmap* bitmap) {
41 bitmap->allocN32Pixels(64, 64);
42 SkCanvas canvas(*bitmap);
43 SkPaint darkPaint;
44 darkPaint.setColor(0xFF404040);
45 SkPaint lightPaint;
46 lightPaint.setColor(0xFFA0A0A0);
47 for (int y = 0; y < 64; y += 32) {
48 for (int x = 0; x < 64; x += 32) {
49 canvas.save();
50 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
51 canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint);
52 canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint);
53 canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint);
54 canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint);
55 canvas.restore();
56 }
57 }
58 }
59
onDraw(SkCanvas * canvas)60 virtual void onDraw(SkCanvas* canvas) {
61 canvas->clear(SK_ColorBLACK);
62 SkMatrix matrix;
63 SkScalar margin = SkIntToScalar(10);
64 matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2));
65 SkBitmap checkerboard;
66 make_checkerboard(&checkerboard);
67
68 SkRect srcRect = SkRect::MakeWH(96, 96);
69
70 canvas->translate(margin, margin);
71 draw(canvas, srcRect, checkerboard, matrix, kNone_SkFilterQuality);
72
73 canvas->translate(srcRect.width() + margin, 0);
74 draw(canvas, srcRect, checkerboard, matrix, kLow_SkFilterQuality);
75
76 #if 0
77 // This may be causing Mac 10.6 to barf.
78 canvas->translate(srcRect.width() + margin, 0);
79 draw(canvas, srcRect, checkerboard, matrix, kMedium_SkFilterQuality);
80
81 canvas->translate(srcRect.width() + margin, 0);
82 draw(canvas, srcRect, checkerboard, matrix, kHigh_SkFilterQuality);
83 #endif
84 }
85
86 private:
87 typedef GM INHERITED;
88 };
89
90 //////////////////////////////////////////////////////////////////////////////
91
MyFactory(void *)92 static GM* MyFactory(void*) { return new MatrixImageFilterGM; }
93 static GMRegistry reg(MyFactory);
94
95 }
96