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 "sk_tool_utils.h"
10 #include "SkColor.h"
11 #include "SkImageFilter.h"
12
draw(SkCanvas * canvas,const SkRect & rect,const SkBitmap & bitmap,const SkMatrix & matrix,SkFilterQuality filter)13 static void draw(SkCanvas* canvas, const SkRect& rect, const SkBitmap& bitmap,
14 const SkMatrix& matrix, SkFilterQuality filter) {
15 SkPaint paint;
16 paint.setImageFilter(SkImageFilter::MakeMatrixFilter(matrix, filter, nullptr));
17 canvas->saveLayer(&rect, &paint);
18 canvas->drawBitmap(bitmap, 0, 0);
19 canvas->restore();
20 }
21
make_checkerboard(SkBitmap * bitmap)22 static void make_checkerboard(SkBitmap* bitmap) {
23 bitmap->allocN32Pixels(64, 64);
24 SkCanvas canvas(*bitmap);
25 SkPaint darkPaint;
26 darkPaint.setColor(sk_tool_utils::color_to_565(0xFF404040));
27 SkPaint lightPaint;
28 lightPaint.setColor(sk_tool_utils::color_to_565(0xFFA0A0A0));
29 for (int y = 0; y < 64; y += 32) {
30 for (int x = 0; x < 64; x += 32) {
31 canvas.save();
32 canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
33 canvas.drawRect(SkRect::MakeXYWH(0, 0, 16, 16), darkPaint);
34 canvas.drawRect(SkRect::MakeXYWH(16, 0, 16, 16), lightPaint);
35 canvas.drawRect(SkRect::MakeXYWH(0, 16, 16, 16), lightPaint);
36 canvas.drawRect(SkRect::MakeXYWH(16, 16, 16, 16), darkPaint);
37 canvas.restore();
38 }
39 }
40 }
41
42 DEF_SIMPLE_GM_BG(matriximagefilter, canvas, 420, 100, SK_ColorBLACK) {
43 SkMatrix matrix;
44 SkScalar margin = SkIntToScalar(10);
45 matrix.setSkew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2));
46 SkBitmap checkerboard;
47 make_checkerboard(&checkerboard);
48
49 SkRect srcRect = SkRect::MakeWH(96, 96);
50
51 canvas->translate(margin, margin);
52 draw(canvas, srcRect, checkerboard, matrix, kNone_SkFilterQuality);
53
54 canvas->translate(srcRect.width() + margin, 0);
55 draw(canvas, srcRect, checkerboard, matrix, kLow_SkFilterQuality);
56
57 #if 0
58 // This may be causing Mac 10.6 to barf.
59 canvas->translate(srcRect.width() + margin, 0);
60 draw(canvas, srcRect, checkerboard, matrix, kMedium_SkFilterQuality);
61
62 canvas->translate(srcRect.width() + margin, 0);
63 draw(canvas, srcRect, checkerboard, matrix, kHigh_SkFilterQuality);
64 #endif
65 }
66