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
|
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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 "WebFontImpl.h"
#include "Font.h"
#include "FontDescription.h"
#include "GraphicsContext.h"
#include "painting/GraphicsContextBuilder.h"
#include "TextRun.h"
#include "WebFloatPoint.h"
#include "WebFloatRect.h"
#include "WebFontDescription.h"
#include "WebRect.h"
#include "WebTextRun.h"
using namespace WebCore;
namespace WebKit {
WebFont* WebFont::create(const WebFontDescription& desc)
{
return new WebFontImpl(desc, desc.letterSpacing, desc.wordSpacing);
}
WebFontImpl::WebFontImpl(const FontDescription& desc, short letterSpacing, short wordSpacing)
: m_font(desc, letterSpacing, wordSpacing)
{
m_font.update(0);
}
WebFontDescription WebFontImpl::fontDescription() const
{
return WebFontDescription(m_font.fontDescription(), m_font.letterSpacing(), m_font.wordSpacing());
}
int WebFontImpl::ascent() const
{
return m_font.fontMetrics().ascent();
}
int WebFontImpl::descent() const
{
return m_font.fontMetrics().descent();
}
int WebFontImpl::height() const
{
return m_font.fontMetrics().height();
}
int WebFontImpl::lineSpacing() const
{
return m_font.fontMetrics().lineSpacing();
}
float WebFontImpl::xHeight() const
{
return m_font.fontMetrics().xHeight();
}
void WebFontImpl::drawText(WebCanvas* canvas, const WebTextRun& run, const WebFloatPoint& leftBaseline,
WebColor color, const WebRect& clip, bool canvasIsOpaque,
int from, int to) const
{
// FIXME hook canvasIsOpaque up to the platform-specific indicators for
// whether subpixel AA can be used for this draw. On Windows, this is
// PlatformContextSkia::setDrawingToImageBuffer.
GraphicsContextBuilder builder(canvas);
GraphicsContext& gc = builder.context();
gc.save();
gc.setFillColor(color, ColorSpaceDeviceRGB);
gc.clip(WebCore::FloatRect(clip));
m_font.drawText(&gc, run, leftBaseline, from, to);
gc.restore();
}
int WebFontImpl::calculateWidth(const WebTextRun& run) const
{
return m_font.width(run, 0);
}
int WebFontImpl::offsetForPosition(const WebTextRun& run, float position) const
{
return m_font.offsetForPosition(run, position, true);
}
WebFloatRect WebFontImpl::selectionRectForText(const WebTextRun& run, const WebFloatPoint& leftBaseline, int height, int from, int to) const
{
return m_font.selectionRectForText(run, leftBaseline, height, from, to);
}
} // namespace WebKit
|
