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
|
/*
* Copyright (C) 2011 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "SkPaint.h"
#include "SkPath.h"
#include "SkPDFUtils.h"
#include "SkStream.h"
#include "SkString.h"
#include "SkPDFTypes.h"
// static
SkPDFArray* SkPDFUtils::MatrixToArray(const SkMatrix& matrix) {
SkScalar values[6];
if (!matrix.asAffine(values)) {
SkMatrix::SetAffineIdentity(values);
}
SkPDFArray* result = new SkPDFArray;
result->reserve(6);
for (size_t i = 0; i < SK_ARRAY_COUNT(values); i++) {
result->appendScalar(values[i]);
}
return result;
}
// static
void SkPDFUtils::AppendTransform(const SkMatrix& matrix, SkWStream* content) {
SkScalar values[6];
if (!matrix.asAffine(values)) {
SkMatrix::SetAffineIdentity(values);
}
for (size_t i = 0; i < SK_ARRAY_COUNT(values); i++) {
SkPDFScalar::Append(values[i], content);
content->writeText(" ");
}
content->writeText("cm\n");
}
// static
void SkPDFUtils::MoveTo(SkScalar x, SkScalar y, SkWStream* content) {
SkPDFScalar::Append(x, content);
content->writeText(" ");
SkPDFScalar::Append(y, content);
content->writeText(" m\n");
}
// static
void SkPDFUtils::AppendLine(SkScalar x, SkScalar y, SkWStream* content) {
SkPDFScalar::Append(x, content);
content->writeText(" ");
SkPDFScalar::Append(y, content);
content->writeText(" l\n");
}
// static
void SkPDFUtils::AppendCubic(SkScalar ctl1X, SkScalar ctl1Y,
SkScalar ctl2X, SkScalar ctl2Y,
SkScalar dstX, SkScalar dstY, SkWStream* content) {
SkString cmd("y\n");
SkPDFScalar::Append(ctl1X, content);
content->writeText(" ");
SkPDFScalar::Append(ctl1Y, content);
content->writeText(" ");
if (ctl2X != dstX || ctl2Y != dstY) {
cmd.set("c\n");
SkPDFScalar::Append(ctl2X, content);
content->writeText(" ");
SkPDFScalar::Append(ctl2Y, content);
content->writeText(" ");
}
SkPDFScalar::Append(dstX, content);
content->writeText(" ");
SkPDFScalar::Append(dstY, content);
content->writeText(" ");
content->writeText(cmd.c_str());
}
// static
void SkPDFUtils::AppendRectangle(const SkRect& rect, SkWStream* content) {
// Skia has 0,0 at top left, pdf at bottom left. Do the right thing.
SkScalar bottom = SkMinScalar(rect.fBottom, rect.fTop);
SkPDFScalar::Append(rect.fLeft, content);
content->writeText(" ");
SkPDFScalar::Append(bottom, content);
content->writeText(" ");
SkPDFScalar::Append(rect.width(), content);
content->writeText(" ");
SkPDFScalar::Append(rect.height(), content);
content->writeText(" re\n");
}
// static
void SkPDFUtils::EmitPath(const SkPath& path, SkWStream* content) {
SkPoint args[4];
SkPath::Iter iter(path, false);
for (SkPath::Verb verb = iter.next(args);
verb != SkPath::kDone_Verb;
verb = iter.next(args)) {
// args gets all the points, even the implicit first point.
switch (verb) {
case SkPath::kMove_Verb:
MoveTo(args[0].fX, args[0].fY, content);
break;
case SkPath::kLine_Verb:
AppendLine(args[1].fX, args[1].fY, content);
break;
case SkPath::kQuad_Verb: {
// Convert quad to cubic (degree elevation). http://goo.gl/vS4i
const SkScalar three = SkIntToScalar(3);
args[1].scale(SkIntToScalar(2));
SkScalar ctl1X = SkScalarDiv(args[0].fX + args[1].fX, three);
SkScalar ctl1Y = SkScalarDiv(args[0].fY + args[1].fY, three);
SkScalar ctl2X = SkScalarDiv(args[2].fX + args[1].fX, three);
SkScalar ctl2Y = SkScalarDiv(args[2].fY + args[1].fY, three);
AppendCubic(ctl1X, ctl1Y, ctl2X, ctl2Y, args[2].fX, args[2].fY,
content);
break;
}
case SkPath::kCubic_Verb:
AppendCubic(args[1].fX, args[1].fY, args[2].fX, args[2].fY,
args[3].fX, args[3].fY, content);
break;
case SkPath::kClose_Verb:
ClosePath(content);
break;
default:
SkASSERT(false);
break;
}
}
}
// static
void SkPDFUtils::ClosePath(SkWStream* content) {
content->writeText("h\n");
}
// static
void SkPDFUtils::PaintPath(SkPaint::Style style, SkPath::FillType fill,
SkWStream* content) {
if (style == SkPaint::kFill_Style)
content->writeText("f");
else if (style == SkPaint::kStrokeAndFill_Style)
content->writeText("B");
else if (style == SkPaint::kStroke_Style)
content->writeText("S");
if (style != SkPaint::kStroke_Style) {
NOT_IMPLEMENTED(fill == SkPath::kInverseEvenOdd_FillType, false);
NOT_IMPLEMENTED(fill == SkPath::kInverseWinding_FillType, false);
if (fill == SkPath::kEvenOdd_FillType)
content->writeText("*");
}
content->writeText("\n");
}
// static
void SkPDFUtils::StrokePath(SkWStream* content) {
SkPDFUtils::PaintPath(
SkPaint::kStroke_Style, SkPath::kWinding_FillType, content);
}
// static
void SkPDFUtils::DrawFormXObject(int objectIndex, SkWStream* content) {
content->writeText("/X");
content->writeDecAsText(objectIndex);
content->writeText(" Do\n");
}
// static
void SkPDFUtils::ApplyGraphicState(int objectIndex, SkWStream* content) {
content->writeText("/G");
content->writeDecAsText(objectIndex);
content->writeText(" gs\n");
}
|
