1// Copyright 2020 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3#include "tools/fiddle/examples.h"
4REG_FIDDLE(example3ps, 320, 256, false, 0) {
5static SkMatrix setpsmatrix(float sx, float kx, float ky, float sy, float tx, float ty, int h) {
6    SkMatrix m;
7
8    m.setAll(sx, -kx, -tx * sx - (ty - h) * kx, -ky, sy, (ty - h) * sy + tx * ky, 0, 0, 1);
9    return m;
10}
11
12void draw(SkCanvas* canvas) {
13    canvas->save();
14    canvas->scale(15, -15);
15    canvas->translate(0, -28);
16    SkPath path;
17    path.moveTo(2, 2);
18    path.lineTo(3, 3);
19    path.lineTo(3, 4);
20    path.lineTo(2, 4);
21    path.lineTo(1, 5);
22    path.close();
23    SkPaint p;
24    p.setAntiAlias(true);
25    p.setStrokeWidth(0.1f);
26
27    canvas->save();
28    canvas->translate(0, 18);
29    p.setColor(SK_ColorGRAY);
30    canvas->drawPath(path, p);
31    canvas->restore();
32
33    p.setStyle(SkPaint::kStroke_Style);
34    canvas->save();
35    canvas->translate(8, 19);
36    canvas->rotate(90);
37    p.setColor(SK_ColorRED);
38    canvas->drawPath(path, p);
39    canvas->restore();
40
41    canvas->save();
42    canvas->translate(5, 23);
43    canvas->rotate(-90);
44    p.setColor(SK_ColorBLUE);
45    canvas->drawPath(path, p);
46    canvas->restore();
47
48    canvas->save();
49    canvas->translate(14, 18);
50    canvas->scale(-1, 1);
51    p.setColor(0xFF007F00);
52    canvas->drawPath(path, p);
53    canvas->restore();
54    canvas->restore();
55
56    canvas->scale(15, 15);
57    canvas->translate(0, 24);
58
59    SkMatrix m;
60    unsigned char d[] = {0x00, 0x00, 0x00, 0x00, 0xff, 0xff};
61    sk_sp<SkData> data = SkData::MakeWithoutCopy((unsigned char*)d, sizeof(d));
62    SkImageInfo info =
63            SkImageInfo::Make(3, 2, SkColorType::kGray_8_SkColorType, kOpaque_SkAlphaType);
64    sk_sp<SkImage> image = SkImage::MakeRasterData(info, data, 3);
65
66    canvas->save();
67    m = setpsmatrix(1, 0, 0, 1, -1, -24, 2);
68    //  m.setAll(1, 0, -1, 0, 1, -24, 0, 0, 1);
69    canvas->concat(m);
70    canvas->drawImage(image, 0, 0);
71    canvas->restore();
72
73    canvas->save();
74    m = setpsmatrix(0, 1, 1, 0, -24, -5, 2);
75    //  m.setAll(0, -1, 5, -1, 0, -22, 0, 0, 1);
76    canvas->concat(m);
77    canvas->drawImage(image, 0, 0);
78    canvas->restore();
79
80    canvas->save();
81    m = setpsmatrix(0, 1, -1, 0, 27, -8, 2);
82    //  m.setAll(0, -1, 8, 1, 0, -25, 0, 0, 1);
83    canvas->concat(m);
84    canvas->drawImage(image, 0, 0);
85    canvas->restore();
86
87    canvas->save();
88    m = setpsmatrix(0, -1, -1, 0, -24, 13, 2);
89    //  m.setAll(0, 1, 9, -1, 0, -22, 0, 0, 1);
90    canvas->concat(m);
91    canvas->drawImage(image, 0, 0);
92    canvas->restore();
93
94    canvas->save();
95    m = setpsmatrix(-1, 0, 0, -1, 17, 26, 2);
96    //  m.setAll(-1, 0, 15, 0, -1, -22, 0, 0, 1);
97    canvas->concat(m);
98    canvas->drawImage(image, 0, 0);
99    canvas->restore();
100
101    canvas->save();
102    m = setpsmatrix(-1, 0, 0, 1, 21, -24, 2);
103    //  m.setAll(-1, 0, 19, 0, 1, -24, 0, 0, 1);
104    canvas->concat(m);
105    canvas->drawImage(image, 0, 0);
106    canvas->restore();
107}
108}  // END FIDDLE
109