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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkFilterQuality.h"
13 #include "include/core/SkImage.h"
14 #include "include/core/SkMatrix.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkScalar.h"
18 #include "include/effects/SkImageFilters.h"
19
draw(SkCanvas * canvas,const SkRect & rect,const SkBitmap & bitmap,const SkMatrix & matrix,const SkSamplingOptions & sampling)20 static void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap,
21 const SkMatrix& matrix, const SkSamplingOptions& sampling) {
22 SkPaint paint;
23 paint.setImageFilter(SkImageFilters::MatrixTransform(matrix, sampling, nullptr));
24 canvas->saveLayer(&rect, &paint);
25 canvas->drawImage(bitmap.asImage(), 0, 0, sampling);
26 canvas->restore();
27 }
28
make_checkerboard(SkBitmap * bitmap)29 static void make_checkerboard(SkBitmap* bitmap) {
30 bitmap->allocN32Pixels(64, 64);
31 SkCanvas canvas(*bitmap);
32 SkPaint darkPaint;
33 darkPaint.setColor(0xFF404040);
34 SkPaint lightPaint;
35 lightPaint.setColor(0xFFA0A0A0);
36 for (int y = 0; y < 64; y += 32) {
37 for (int x = 0; x < 64; x += 32) {
38 canvas.save();
39 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
40 canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint);
41 canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint);
42 canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint);
43 canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint);
44 canvas.restore();
45 }
46 }
47 }
48
49 DEF_SIMPLE_GM_BG(matriximagefilter, canvas, 420, 100, SK_ColorBLACK) {
50 SkMatrix matrix;
51 SkScalar margin = SkIntToScalar(10);
52 matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2));
53 SkBitmap checkerboard;
54 make_checkerboard(&checkerboard);
55
56 SkRect srcRect = SkRect::MakeWH(96, 96);
57
58 canvas->translate(margin, margin);
59 draw(canvas, srcRect, checkerboard, matrix, SkSamplingOptions());
60
61 canvas->translate(srcRect.width() + margin, 0);
62 draw(canvas, srcRect, checkerboard, matrix, SkSamplingOptions(SkFilterMode::kLinear));
63
64 #if 0
65 // This may be causing Mac 10.6 to barf.
66 canvas->translate(srcRect.width() + margin, 0);
67 draw(canvas, srcRect, checkerboard, matrix, kMedium_SkFilterQuality);
68
69 canvas->translate(srcRect.width() + margin, 0);
70 draw(canvas, srcRect, checkerboard, matrix, kHigh_SkFilterQuality);
71 #endif
72 }
73