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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "SkCanvas.h"
#include "SkParsePath.h"
#include "SkPath.h"
#include "SkRandom.h"
#include "SkView.h"
#include "SkBlurMaskFilter.h"
static void test_huge_stroke(SkCanvas* canvas) {
SkRect srcR = { 0, 0, 72000, 54000 };
SkRect dstR = { 0, 0, 640, 480 };
SkPath path;
path.moveTo(17600, 8000);
path.lineTo(52800, 8000);
path.lineTo(52800, 41600);
path.lineTo(17600, 41600);
path.close();
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(8000);
paint.setStrokeMiter(10);
paint.setStrokeCap(SkPaint::kButt_Cap);
paint.setStrokeJoin(SkPaint::kRound_Join);
paint.setStyle(SkPaint::kStroke_Style);
SkMatrix matrix;
matrix.setRectToRect(srcR, dstR, SkMatrix::kCenter_ScaleToFit);
canvas->concat(matrix);
canvas->drawPath(path, paint);
}
#if 0
#include "SkBlurMask.h"
static void test_blur() {
uint8_t cell[9];
memset(cell, 0xFF, sizeof(cell));
SkMask src;
src.fImage = cell;
src.fFormat = SkMask::kA8_Format;
SkMask dst;
for (int y = 1; y <= 3; y++) {
for (int x = 1; x <= 3; x++) {
src.fBounds.set(0, 0, x, y);
src.fRowBytes = src.fBounds.width();
SkScalar radius = 1.f;
printf("src [%d %d %d %d] radius %g\n", src.fBounds.fLeft, src.fBounds.fTop,
src.fBounds.fRight, src.fBounds.fBottom, radius);
SkBlurMask::Blur(&dst, src, radius, SkBlurMask::kNormal_Style);
uint8_t* dstPtr = dst.fImage;
for (int y = 0; y < dst.fBounds.height(); y++) {
for (int x = 0; x < dst.fBounds.width(); x++) {
printf(" %02X", dstPtr[x]);
}
printf("\n");
dstPtr += dst.fRowBytes;
}
}
}
}
#endif
static void scale_to_width(SkPath* path, SkScalar dstWidth) {
const SkRect& bounds = path->getBounds();
SkScalar scale = dstWidth / bounds.width();
SkMatrix matrix;
matrix.setScale(scale, scale);
path->transform(matrix);
}
static const struct {
SkPaint::Style fStyle;
SkPaint::Join fJoin;
int fStrokeWidth;
} gRec[] = {
{ SkPaint::kFill_Style, SkPaint::kMiter_Join, 0 },
{ SkPaint::kStroke_Style, SkPaint::kMiter_Join, 0 },
{ SkPaint::kStroke_Style, SkPaint::kMiter_Join, 10 },
{ SkPaint::kStrokeAndFill_Style, SkPaint::kMiter_Join, 10 },
};
class StrokePathView : public SampleView {
SkScalar fWidth;
SkPath fPath;
public:
StrokePathView() {
// test_blur();
fWidth = SkIntToScalar(120);
#if 0
const char str[] =
"M 0, 3"
"C 10, -10, 30, -10, 0, 28"
"C -30, -10, -10, -10, 0, 3"
"Z";
SkParsePath::FromSVGString(str, &fPath);
#else
fPath.addCircle(0, 0, SkIntToScalar(50), SkPath::kCW_Direction);
fPath.addCircle(0, SkIntToScalar(-50), SkIntToScalar(30), SkPath::kCW_Direction);
#endif
scale_to_width(&fPath, fWidth);
const SkRect& bounds = fPath.getBounds();
fPath.offset(-bounds.fLeft, -bounds.fTop);
this->setBGColor(0xFFDDDDDD);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "StrokePath");
return true;
}
return this->INHERITED::onQuery(evt);
}
SkRandom rand;
void drawSet(SkCanvas* canvas, SkPaint* paint) {
SkAutoCanvasRestore acr(canvas, true);
for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
paint->setStyle(gRec[i].fStyle);
paint->setStrokeJoin(gRec[i].fJoin);
paint->setStrokeWidth(SkIntToScalar(gRec[i].fStrokeWidth));
canvas->drawPath(fPath, *paint);
canvas->translate(fWidth * 5 / 4, 0);
}
}
virtual void onDrawContent(SkCanvas* canvas) {
test_huge_stroke(canvas); return;
canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
SkPaint paint;
paint.setAntiAlias(true);
if (true) {
canvas->drawColor(SK_ColorBLACK);
paint.setTextSize(24);
paint.setColor(SK_ColorWHITE);
canvas->translate(10, 30);
static const SkBlurMaskFilter::BlurStyle gStyle[] = {
SkBlurMaskFilter::kNormal_BlurStyle,
SkBlurMaskFilter::kInner_BlurStyle,
SkBlurMaskFilter::kOuter_BlurStyle,
SkBlurMaskFilter::kSolid_BlurStyle,
};
for (int x = 0; x < 5; x++) {
SkMaskFilter* mf;
SkScalar radius = 4;
for (int y = 0; y < 10; y++) {
if (x) {
mf = SkBlurMaskFilter::Create(radius, gStyle[x - 1]);
paint.setMaskFilter(mf)->unref();
}
canvas->drawText("Title Bar", 9, x*SkIntToScalar(100), y*SkIntToScalar(30), paint);
radius *= 0.75f;
}
}
return;
}
paint.setColor(SK_ColorBLUE);
#if 1
SkPath p;
float r = rand.nextUScalar1() + 0.5f;
SkScalar x = 0, y = 0;
p.moveTo(x, y);
#if 0
p.cubicTo(x-75*r, y+75*r, x-40*r, y+125*r, x, y+85*r);
p.cubicTo(x+40*r, y+125*r, x+75*r, y+75*r, x, y);
#else
p.cubicTo(x+75*r, y+75*r, x+40*r, y+125*r, x, y+85*r);
p.cubicTo(x-40*r, y+125*r, x-75*r, y+75*r, x, y);
#endif
p.close();
fPath = p;
fPath.offset(100, 0);
#endif
fPath.setFillType(SkPath::kWinding_FillType);
drawSet(canvas, &paint);
canvas->translate(0, fPath.getBounds().height() * 5 / 4);
fPath.setFillType(SkPath::kEvenOdd_FillType);
drawSet(canvas, &paint);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y,
unsigned modi) SK_OVERRIDE {
this->inval(NULL);
return this->INHERITED::onFindClickHandler(x, y, modi);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new StrokePathView; }
static SkViewRegister reg(MyFactory);
|
