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
|
/*
* Copyright (C) 2010 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CairoUtilities.h"
#include "AffineTransform.h"
#include "Color.h"
#include "FloatPoint.h"
#include "FloatRect.h"
#include "IntRect.h"
#include "OwnPtrCairo.h"
#include "Path.h"
#include "PlatformPathCairo.h"
#include "RefPtrCairo.h"
#include <wtf/Vector.h>
namespace WebCore {
void copyContextProperties(cairo_t* srcCr, cairo_t* dstCr)
{
cairo_set_antialias(dstCr, cairo_get_antialias(srcCr));
size_t dashCount = cairo_get_dash_count(srcCr);
Vector<double> dashes(dashCount);
double offset;
cairo_get_dash(srcCr, dashes.data(), &offset);
cairo_set_dash(dstCr, dashes.data(), dashCount, offset);
cairo_set_line_cap(dstCr, cairo_get_line_cap(srcCr));
cairo_set_line_join(dstCr, cairo_get_line_join(srcCr));
cairo_set_line_width(dstCr, cairo_get_line_width(srcCr));
cairo_set_miter_limit(dstCr, cairo_get_miter_limit(srcCr));
cairo_set_fill_rule(dstCr, cairo_get_fill_rule(srcCr));
}
void setSourceRGBAFromColor(cairo_t* context, const Color& color)
{
float red, green, blue, alpha;
color.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(context, red, green, blue, alpha);
}
void appendPathToCairoContext(cairo_t* to, cairo_t* from)
{
OwnPtr<cairo_path_t> cairoPath(cairo_copy_path(from));
cairo_append_path(to, cairoPath.get());
}
void setPathOnCairoContext(cairo_t* to, cairo_t* from)
{
cairo_new_path(to);
appendPathToCairoContext(to, from);
}
void appendWebCorePathToCairoContext(cairo_t* context, const Path& path)
{
appendPathToCairoContext(context, path.platformPath()->context());
}
cairo_operator_t toCairoOperator(CompositeOperator op)
{
switch (op) {
case CompositeClear:
return CAIRO_OPERATOR_CLEAR;
case CompositeCopy:
return CAIRO_OPERATOR_SOURCE;
case CompositeSourceOver:
return CAIRO_OPERATOR_OVER;
case CompositeSourceIn:
return CAIRO_OPERATOR_IN;
case CompositeSourceOut:
return CAIRO_OPERATOR_OUT;
case CompositeSourceAtop:
return CAIRO_OPERATOR_ATOP;
case CompositeDestinationOver:
return CAIRO_OPERATOR_DEST_OVER;
case CompositeDestinationIn:
return CAIRO_OPERATOR_DEST_IN;
case CompositeDestinationOut:
return CAIRO_OPERATOR_DEST_OUT;
case CompositeDestinationAtop:
return CAIRO_OPERATOR_DEST_ATOP;
case CompositeXOR:
return CAIRO_OPERATOR_XOR;
case CompositePlusDarker:
#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 10, 0)
return CAIRO_OPERATOR_DARKEN;
#else
return CAIRO_OPERATOR_SATURATE;
#endif
case CompositeHighlight:
// There is no Cairo equivalent for CompositeHighlight.
return CAIRO_OPERATOR_OVER;
case CompositePlusLighter:
return CAIRO_OPERATOR_ADD;
default:
return CAIRO_OPERATOR_SOURCE;
}
}
void drawPatternToCairoContext(cairo_t* cr, cairo_surface_t* image, const IntSize& imageSize, const FloatRect& tileRect,
const AffineTransform& patternTransform, const FloatPoint& phase, cairo_operator_t op, const FloatRect& destRect)
{
// Avoid NaN
if (!isfinite(phase.x()) || !isfinite(phase.y()))
return;
cairo_save(cr);
RefPtr<cairo_surface_t> clippedImageSurface = 0;
if (tileRect.size() != imageSize) {
IntRect imageRect = enclosingIntRect(tileRect);
clippedImageSurface = adoptRef(cairo_image_surface_create(CAIRO_FORMAT_ARGB32, imageRect.width(), imageRect.height()));
RefPtr<cairo_t> clippedImageContext = adoptRef(cairo_create(clippedImageSurface.get()));
cairo_set_source_surface(clippedImageContext.get(), image, -tileRect.x(), -tileRect.y());
cairo_paint(clippedImageContext.get());
image = clippedImageSurface.get();
}
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_matrix_t patternMatrix = cairo_matrix_t(patternTransform);
cairo_matrix_t phaseMatrix = {1, 0, 0, 1, phase.x() + tileRect.x() * patternTransform.a(), phase.y() + tileRect.y() * patternTransform.d()};
cairo_matrix_t combined;
cairo_matrix_multiply(&combined, &patternMatrix, &phaseMatrix);
cairo_matrix_invert(&combined);
cairo_pattern_set_matrix(pattern, &combined);
cairo_set_operator(cr, op);
cairo_set_source(cr, pattern);
cairo_pattern_destroy(pattern);
cairo_rectangle(cr, destRect.x(), destRect.y(), destRect.width(), destRect.height());
cairo_fill(cr);
cairo_restore(cr);
}
} // namespace WebCore
|
