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
|
/*
* 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 "gm.h"
#include "SkCanvas.h"
//#include "SkParsePath.h"
#include "SkPath.h"
//#include "SkRandom.h"
namespace skiagm {
static const SkColor gPathColor = SK_ColorBLACK;
static const SkColor gClipAColor = SK_ColorBLUE;
static const SkColor gClipBColor = SK_ColorRED;
class ComplexClipGM : public GM {
bool fDoAAClip;
bool fDoSaveLayer;
public:
ComplexClipGM(bool aaclip, bool saveLayer)
: fDoAAClip(aaclip)
, fDoSaveLayer(saveLayer) {
this->setBGColor(0xFFDDDDDD);
// this->setBGColor(SkColorSetRGB(0xB0,0xDD,0xB0));
}
protected:
virtual uint32_t onGetFlags() const SK_OVERRIDE {
return kSkipTiled_Flag;
}
SkString onShortName() {
SkString str;
str.printf("complexclip_%s%s",
fDoAAClip ? "aa" : "bw",
fDoSaveLayer ? "_layer" : "");
return str;
}
SkISize onISize() { return SkISize::Make(970, 780); }
virtual void onDraw(SkCanvas* canvas) {
SkPath path;
path.moveTo(SkIntToScalar(0), SkIntToScalar(50));
path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0));
path.lineTo(SkIntToScalar(175), SkIntToScalar(0));
path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25));
path.lineTo(SkIntToScalar(200), SkIntToScalar(150));
path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200));
path.lineTo(SkIntToScalar(0), SkIntToScalar(200));
path.close();
path.moveTo(SkIntToScalar(50), SkIntToScalar(50));
path.lineTo(SkIntToScalar(150), SkIntToScalar(50));
path.lineTo(SkIntToScalar(150), SkIntToScalar(125));
path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150));
path.lineTo(SkIntToScalar(50), SkIntToScalar(150));
path.close();
path.setFillType(SkPath::kEvenOdd_FillType);
SkPaint pathPaint;
pathPaint.setAntiAlias(true);
pathPaint.setColor(gPathColor);
SkPath clipA;
clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20));
clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22));
clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105));
clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177));
clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180));
clipA.close();
SkPath clipB;
clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10));
clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15));
clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190));
clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185));
clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100));
clipB.close();
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setTextSize(SkIntToScalar(20));
static const struct {
SkRegion::Op fOp;
const char* fName;
} gOps[] = { //extra spaces in names for measureText
{SkRegion::kIntersect_Op, "Isect "},
{SkRegion::kDifference_Op, "Diff " },
{SkRegion::kUnion_Op, "Union "},
{SkRegion::kXOR_Op, "Xor " },
{SkRegion::kReverseDifference_Op, "RDiff "}
};
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4);
if (fDoSaveLayer) {
// We want the layer to appear symmetric relative to actual
// device boundaries so we need to "undo" the effect of the
// scale and translate
SkRect bounds = SkRect::MakeLTRB(
4.0f/3.0f * -20,
4.0f/3.0f * -20,
4.0f/3.0f * (this->getISize().fWidth - 20),
4.0f/3.0f * (this->getISize().fHeight - 20));
bounds.inset(SkIntToScalar(100), SkIntToScalar(100));
SkPaint boundPaint;
boundPaint.setColor(SK_ColorRED);
boundPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundPaint);
canvas->saveLayer(&bounds, NULL);
}
for (int invBits = 0; invBits < 4; ++invBits) {
canvas->save();
for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) {
this->drawHairlines(canvas, path, clipA, clipB);
bool doInvA = SkToBool(invBits & 1);
bool doInvB = SkToBool(invBits & 2);
canvas->save();
// set clip
clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType :
SkPath::kEvenOdd_FillType);
clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
SkPath::kEvenOdd_FillType);
canvas->clipPath(clipA, SkRegion::kIntersect_Op, fDoAAClip);
canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip);
// draw path clipped
canvas->drawPath(path, pathPaint);
canvas->restore();
SkScalar txtX = SkIntToScalar(45);
paint.setColor(gClipAColor);
const char* aTxt = doInvA ? "InvA " : "A ";
canvas->drawText(aTxt, strlen(aTxt), txtX, SkIntToScalar(220), paint);
txtX += paint.measureText(aTxt, strlen(aTxt));
paint.setColor(SK_ColorBLACK);
canvas->drawText(gOps[op].fName, strlen(gOps[op].fName),
txtX, SkIntToScalar(220), paint);
txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName));
paint.setColor(gClipBColor);
const char* bTxt = doInvB ? "InvB " : "B ";
canvas->drawText(bTxt, strlen(bTxt), txtX, SkIntToScalar(220), paint);
canvas->translate(SkIntToScalar(250),0);
}
canvas->restore();
canvas->translate(0, SkIntToScalar(250));
}
if (fDoSaveLayer) {
canvas->restore();
}
}
private:
void drawHairlines(SkCanvas* canvas, const SkPath& path,
const SkPath& clipA, const SkPath& clipB) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
const SkAlpha fade = 0x33;
// draw path in hairline
paint.setColor(gPathColor); paint.setAlpha(fade);
canvas->drawPath(path, paint);
// draw clips in hair line
paint.setColor(gClipAColor); paint.setAlpha(fade);
canvas->drawPath(clipA, paint);
paint.setColor(gClipBColor); paint.setAlpha(fade);
canvas->drawPath(clipB, paint);
}
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
// aliased and anti-aliased w/o a layer
static GM* gFact0(void*) { return new ComplexClipGM(false, false); }
static GM* gFact1(void*) { return new ComplexClipGM(true, false); }
// aliased and anti-aliased w/ a layer
static GM* gFact2(void*) { return new ComplexClipGM(false, true); }
static GM* gFact3(void*) { return new ComplexClipGM(true, true); }
static GMRegistry gReg0(gFact0);
static GMRegistry gReg1(gFact1);
static GMRegistry gReg2(gFact2);
static GMRegistry gReg3(gFact3);
}
|
