summaryrefslogtreecommitdiffstats
path: root/WebKit/win/WebKitGraphics.cpp
blob: e9e25ab034e1bcef6572bb48689f99f9aac7c2d7 (plain)
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
/*
 * Copyright (C) 2007 Apple 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:
 * 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 "WebKitGraphics.h"

#include "WebKit.h"
#include "WebKitDLL.h"

#include "WebPreferences.h"

#pragma warning(push, 0)
#include <WebCore/CharacterNames.h>
#include <WebCore/Font.h>
#include <WebCore/FontDescription.h>
#include <WebCore/FontSelector.h>
#include <WebCore/GraphicsContext.h>
#include <WebCore/PlatformString.h>
#include <WebCore/StringTruncator.h>
#include <WebCore/WebCoreTextRenderer.h>

#include <CoreGraphics/CoreGraphics.h>
#pragma warning(pop)

#include <WebKitSystemInterface/WebKitSystemInterface.h>

using namespace WebCore;

static Font makeFont(const WebFontDescription& description)
{
    AtomicString::init();

    String fontFamilyString(description.family, description.familyLength);

    FontDescription f;
    FontFamily family;
    family.setFamily(fontFamilyString);
    f.setFamily(family);
    f.setSpecifiedSize(description.size);
    f.setComputedSize(description.size);
    f.setItalic(description.italic);
    f.setWeight(description.bold ? FontWeightBold : FontWeightNormal);
    f.setIsAbsoluteSize(true);

    FontSmoothingType smoothingType;
    if (SUCCEEDED(WebPreferences::sharedStandardPreferences()->fontSmoothing(&smoothingType)))
        f.setRenderingMode(smoothingType == FontSmoothingTypeWindows ? AlternateRenderingMode : NormalRenderingMode);

    Font font(f, 0, 0);
    font.update(0);

    return font;
}

// Text shadow is added post 3.1.1.  In order for nightlies to not break Safari 3.1.1, we should still allow
// the old WebTextRenderInfo that has a smaller structSize than the current one with the new text shadow data members.
struct WebTextRenderInfoWithoutShadow
{
    DWORD structSize;
    CGContextRef cgContext;
    LPCTSTR text;
    int length;
    POINT pt;
    const WebFontDescription* description;
    CGColorRef color;
    int underlinedIndex;
    bool drawAsPassword;
    int overrideSmoothingLevel; // pass in -1 if caller does not want to override smoothing level
};

void WebDrawText(WebTextRenderInfo* info)
{
    if (!info || info->structSize < sizeof(WebTextRenderInfoWithoutShadow) || !info->cgContext || !info->description)
        return;

    int oldFontSmoothingLevel = -1;
    if (info->overrideSmoothingLevel >= 0) {
        oldFontSmoothingLevel = wkGetFontSmoothingLevel();
        wkSetFontSmoothingLevel(info->overrideSmoothingLevel);
    }

    {
        GraphicsContext context(info->cgContext);
        String drawString(info->text, info->length);
        if (info->drawAsPassword)
            drawString = drawString.impl()->secure(WebCore::bullet);

        context.save();

        // Set shadow setting
        if (info->structSize == sizeof(WebTextRenderInfo) &&
            (info->shadowOffset.cx || info->shadowOffset.cy || info->shadowBlur || info->shadowColor))
            context.setShadow(FloatSize(info->shadowOffset.cx, info->shadowOffset.cy), info->shadowBlur, info->shadowColor, DeviceColorSpace);

        WebCoreDrawTextAtPoint(context, drawString, info->pt, makeFont(*(info->description)), info->color, info->underlinedIndex);
        context.restore();
    }

    if (info->overrideSmoothingLevel >= 0)
        wkSetFontSmoothingLevel(oldFontSmoothingLevel);
}

float TextFloatWidth(LPCTSTR text, int length, const WebFontDescription& description)
{
    return WebCoreTextFloatWidth(String(text, length), makeFont(description));
}

void FontMetrics(const WebFontDescription& description, int* ascent, int* descent, int* lineSpacing)
{
    if (!ascent && !descent && !lineSpacing)
        return;

    Font font(makeFont(description));

    if (ascent)
        *ascent = font.ascent();

    if (descent)
        *descent = font.descent();

    if (lineSpacing)
        *lineSpacing = font.lineSpacing();
}

unsigned CenterTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)
{
    ASSERT(buffer);

    String result = StringTruncator::centerTruncate(String(text, length), width, makeFont(description), false);
    memcpy(buffer, result.characters(), result.length() * sizeof(UChar));
    buffer[result.length()] = '\0';
    return result.length();
}

unsigned RightTruncateStringToWidth(LPCTSTR text, int length, const WebFontDescription& description, float width, WCHAR* buffer)
{
    ASSERT(buffer);

    String result = StringTruncator::rightTruncate(String(text, length), width, makeFont(description), false);
    memcpy(buffer, result.characters(), result.length() * sizeof(UChar));
    buffer[result.length()] = '\0';
    return result.length();
}

void WebKitSetShouldUseFontSmoothing(bool smooth)
{
    WebCoreSetShouldUseFontSmoothing(smooth);
}

bool WebKitShouldUseFontSmoothing()
{
    return WebCoreShouldUseFontSmoothing();
}