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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* 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.h"
#include "sk_tool_utils.h"
#include "SkBitmap.h"
#include "SkPaint.h"
#include "SkPicture.h"
#include "SkPictureRecorder.h"
#include "SkShader.h"
static struct {
SkShader::TileMode tmx;
SkShader::TileMode tmy;
} kTileConfigs[] = {
{ SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode },
{ SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode },
{ SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode },
};
class PictureShaderGM : public skiagm::GM {
public:
PictureShaderGM(SkScalar tileSize, SkScalar sceneSize)
: fTileSize(tileSize)
, fSceneSize(sceneSize) {
}
protected:
void onOnceBeforeDraw() override {
// Build the picture.
SkPictureRecorder recorder;
SkCanvas* pictureCanvas = recorder.beginRecording(fTileSize, fTileSize, nullptr, 0);
this->drawTile(pictureCanvas);
fPicture = recorder.finishRecordingAsPicture();
// Build a reference bitmap.
fBitmap.allocN32Pixels(SkScalarCeilToInt(fTileSize), SkScalarCeilToInt(fTileSize));
fBitmap.eraseColor(SK_ColorTRANSPARENT);
SkCanvas bitmapCanvas(fBitmap);
this->drawTile(&bitmapCanvas);
}
SkString onShortName() override {
return SkString("pictureshader");
}
SkISize onISize() override {
return SkISize::Make(1400, 1450);
}
void onDraw(SkCanvas* canvas) override {
this->drawSceneColumn(canvas, SkPoint::Make(0, 0), 1, 1, 0);
this->drawSceneColumn(canvas, SkPoint::Make(0, fSceneSize * 6.4f), 1, 2, 0);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, 0), 1, 1, 1);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 2.4f, fSceneSize * 6.4f), 1, 1, 2);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 4.8f, 0), 2, 1, 0);
this->drawSceneColumn(canvas, SkPoint::Make(fSceneSize * 9.6f, 0), 2, 2, 0);
// One last custom row to exercise negative scaling
SkMatrix ctm, localMatrix;
ctm.setTranslate(fSceneSize * 2.1f, fSceneSize * 13.8f);
ctm.preScale(-1, -1);
localMatrix.setScale(2, 2);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 2.4f, fSceneSize * 12.8f);
localMatrix.setScale(-1, -1);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 4.8f, fSceneSize * 12.3f);
ctm.preScale(2, 2);
this->drawScene(canvas, ctm, localMatrix, 0);
ctm.setTranslate(fSceneSize * 13.8f, fSceneSize * 14.3f);
ctm.preScale(-2, -2);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preRotate(45);
localMatrix.preScale(-2, -2);
this->drawScene(canvas, ctm, localMatrix, 0);
}
private:
void drawSceneColumn(SkCanvas* canvas, const SkPoint& pos, SkScalar scale, SkScalar localScale,
unsigned tileMode) {
SkMatrix ctm, localMatrix;
ctm.setTranslate(pos.x(), pos.y());
ctm.preScale(scale, scale);
localMatrix.setScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 1.2f * scale);
ctm.preScale(scale, scale);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 2.4f * scale);
ctm.preScale(scale, scale);
localMatrix.setRotate(45);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 3.6f * scale);
ctm.preScale(scale, scale);
localMatrix.setSkew(1, 0);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
ctm.setTranslate(pos.x(), pos.y() + fSceneSize * 4.8f * scale);
ctm.preScale(scale, scale);
localMatrix.setTranslate(fTileSize / 4, fTileSize / 4);
localMatrix.preRotate(45);
localMatrix.preScale(localScale, localScale);
this->drawScene(canvas, ctm, localMatrix, tileMode);
}
void drawTile(SkCanvas* canvas) {
SkPaint paint;
paint.setColor(SK_ColorGREEN);
paint.setStyle(SkPaint::kFill_Style);
paint.setAntiAlias(true);
canvas->drawCircle(fTileSize / 4, fTileSize / 4, fTileSize / 4, paint);
canvas->drawRect(SkRect::MakeXYWH(fTileSize / 2, fTileSize / 2,
fTileSize / 2, fTileSize / 2), paint);
paint.setColor(SK_ColorRED);
canvas->drawLine(fTileSize / 2, fTileSize * 1 / 3,
fTileSize / 2, fTileSize * 2 / 3, paint);
canvas->drawLine(fTileSize * 1 / 3, fTileSize / 2,
fTileSize * 2 / 3, fTileSize / 2, paint);
}
void drawScene(SkCanvas* canvas, const SkMatrix& matrix, const SkMatrix& localMatrix,
unsigned tileMode) {
SkASSERT(tileMode < SK_ARRAY_COUNT(kTileConfigs));
SkPaint paint;
paint.setStyle(SkPaint::kFill_Style);
paint.setColor(sk_tool_utils::color_to_565(SK_ColorLTGRAY));
canvas->save();
canvas->concat(matrix);
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->drawRect(SkRect::MakeXYWH(fSceneSize * 1.1f, 0, fSceneSize, fSceneSize), paint);
paint.setShader(SkShader::MakePictureShader(fPicture, kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy, &localMatrix,
nullptr));
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->translate(fSceneSize * 1.1f, 0);
paint.setShader(SkShader::MakeBitmapShader(fBitmap,
kTileConfigs[tileMode].tmx,
kTileConfigs[tileMode].tmy,
&localMatrix));
canvas->drawRect(SkRect::MakeWH(fSceneSize, fSceneSize), paint);
canvas->restore();
}
SkScalar fTileSize;
SkScalar fSceneSize;
sk_sp<SkPicture> fPicture;
SkBitmap fBitmap;
typedef GM INHERITED;
};
DEF_GM(return new PictureShaderGM(50, 100);)
DEF_SIMPLE_GM(tiled_picture_shader, canvas, 400, 400) {
// https://code.google.com/p/skia/issues/detail?id=3398
SkRect tile = SkRect::MakeWH(100, 100);
SkPictureRecorder recorder;
SkCanvas* c = recorder.beginRecording(tile);
SkRect r = tile;
r.inset(4, 4);
SkPaint p;
p.setColor(sk_tool_utils::color_to_565(0xFF303F9F)); // dark blue
c->drawRect(r, p);
p.setColor(sk_tool_utils::color_to_565(0xFFC5CAE9)); // light blue
p.setStrokeWidth(10);
c->drawLine(20, 20, 80, 80, p);
sk_sp<SkPicture> picture(recorder.finishRecordingAsPicture());
p.setColor(sk_tool_utils::color_to_565(0xFF8BC34A)); // green
canvas->drawPaint(p);
canvas->clipRect(SkRect::MakeXYWH(0, 0, 400, 350));
p.setColor(sk_tool_utils::color_to_565(0xFFB6B6B6)); // gray
canvas->drawPaint(p);
p.setShader(SkShader::MakePictureShader(std::move(picture), SkShader::kRepeat_TileMode,
SkShader::kRepeat_TileMode,
nullptr, nullptr));
canvas->drawPaint(p);
}
|
