1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
constexpr SkScalar kPictureSize = SK_Scalar1;
constexpr SkScalar kFillSize = 100;
constexpr unsigned kRowSize = 6;
constexpr struct {
SkScalar x, y, w, h;
SkScalar offsetX, offsetY;
} tiles[] = {
{ 0, 0, 1, 1, 0, 0 },
{ -0.5f, -0.5f, 1, 1, 0, 0 },
{ 0.5f, 0.5f, 1, 1, 0, 0 },
{ 0, 0, 1.5f, 1.5f, 0, 0 },
{ -0.5f, -0.5f, 1.5f, 1.5f, 0, 0 },
{ 0.5f, 0.5f, 1.5f, 1.5f, 0, 0 },
{ 0, 0, 0.5f, 0.5f, 0, 0 },
{ 0.25f, 0.25f, 0.5f, 0.5f, 0, 0 },
{ -0.25f, -0.25f, 0.5f, 0.5f, 0, 0 },
{ 0, 0, 1, 1, 0.5f, 0.5f },
{ -0.5f, -0.5f, 1, 1, 0.5f, 0.5f },
{ 0.5f, 0.5f, 1, 1, 0.5f, 0.5f },
{ 0, 0, 1.5f, 1.5f, 0.5f, 0.5f },
{ -0.5f, -0.5f, 1.5f, 1.5f, 0.5f, 0.5f },
{ 0.5f, 0.5f, 1.5f, 1.5f, 0.5f, 0.5f },
{ 0, 0, 1.5f, 1, 0, 0 },
{ -0.5f, -0.5f, 1.5f, 1, 0, 0 },
{ 0.5f, 0.5f, 1.5f, 1, 0, 0 },
{ 0, 0, 0.5f, 1, 0, 0 },
{ 0.25f, 0.25f, 0.5f, 1, 0, 0 },
{ -0.25f, -0.25f, 0.5f, 1, 0, 0 },
{ 0, 0, 1, 1.5f, 0, 0 },
{ -0.5f, -0.5f, 1, 1.5f, 0, 0 },
{ 0.5f, 0.5f, 1, 1.5f, 0, 0 },
{ 0, 0, 1, 0.5f, 0, 0 },
{ 0.25f, 0.25f, 1, 0.5f, 0, 0 },
{ -0.25f, -0.25f, 1, 0.5f, 0, 0 },
};
static void draw_scene(SkCanvas* canvas, SkScalar pictureSize) {
canvas->clear(SK_ColorWHITE);
SkPaint paint;
paint.setColor(SK_ColorGREEN);
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
canvas->drawCircle(pictureSize / 4, pictureSize / 4, pictureSize / 4, paint);
canvas->drawRect(SkRect::MakeXYWH(pictureSize / 2, pictureSize / 2,
pictureSize / 2, pictureSize / 2), paint);
paint.setColor(SK_ColorRED);
canvas->drawLine(pictureSize / 2, pictureSize * 1 / 3,
pictureSize / 2, pictureSize * 2 / 3, paint);
canvas->drawLine(pictureSize * 1 / 3, pictureSize / 2,
pictureSize * 2 / 3, pictureSize / 2, paint);
paint.setColor(SK_ColorBLACK);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(SkRect::MakeWH(pictureSize, pictureSize), paint);
}
class PictureShaderTileGM : public skiagm::GM {
protected:
SkString onShortName() override {
return SkString("pictureshadertile");
}
SkISize onISize() override {
return SkISize::Make(800, 600);
}
void onOnceBeforeDraw() override {
SkPictureRecorder recorder;
SkCanvas* pictureCanvas = recorder.beginRecording(kPictureSize, kPictureSize);
draw_scene(pictureCanvas, kPictureSize);
sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
SkPoint offset = SkPoint::Make(100, 100);
pictureCanvas = recorder.beginRecording(SkRect::MakeXYWH(offset.x(), offset.y(),
kPictureSize, kPictureSize));
pictureCanvas->translate(offset.x(), offset.y());
draw_scene(pictureCanvas, kPictureSize);
sk_sp<SkPicture> offsetPicture(recorder.finishRecordingAsPicture());
for (unsigned i = 0; i < SK_ARRAY_COUNT(tiles); ++i) {
SkRect tile = SkRect::MakeXYWH(tiles[i].x * kPictureSize,
tiles[i].y * kPictureSize,
tiles[i].w * kPictureSize,
tiles[i].h * kPictureSize);
SkMatrix localMatrix;
localMatrix.setTranslate(tiles[i].offsetX * kPictureSize,
tiles[i].offsetY * kPictureSize);
localMatrix.postScale(kFillSize / (2 * kPictureSize),
kFillSize / (2 * kPictureSize));
sk_sp<SkPicture> pictureRef = picture;
SkRect* tilePtr = &tile;
if (tile == SkRect::MakeWH(kPictureSize, kPictureSize)) {
// When the tile == picture bounds, exercise the picture + offset path.
pictureRef = offsetPicture;
tilePtr = nullptr;
}
fShaders[i] = pictureRef->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
SkFilterMode::kNearest, &localMatrix, tilePtr);
}
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
for (unsigned i = 0; i < SK_ARRAY_COUNT(fShaders); ++i) {
paint.setShader(fShaders[i]);
canvas->save();
canvas->translate((i % kRowSize) * kFillSize * 1.1f,
(i / kRowSize) * kFillSize * 1.1f);
canvas->drawRect(SkRect::MakeWH(kFillSize, kFillSize), paint);
canvas->restore();
}
}
private:
sk_sp<SkShader> fShaders[SK_ARRAY_COUNT(tiles)];
using INHERITED = GM;
};
DEF_GM(return new PictureShaderTileGM;)
|
