1/*
2 * This file is part of the internal font implementation. It should not be included by anyone other than
3 * FontMac.cpp, FontWin.cpp and Font.cpp.
4 *
5 * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#include "config.h"
25#include "FontPlatformData.h"
26
27#include "PlatformString.h"
28#include <ApplicationServices/ApplicationServices.h>
29#include <WebKitSystemInterface/WebKitSystemInterface.h>
30#include <wtf/HashMap.h>
31#include <wtf/RetainPtr.h>
32#include <wtf/Vector.h>
33#include <wtf/text/StringHash.h>
34
35using std::min;
36
37namespace WebCore {
38
39static inline USHORT readBigEndianWord(const BYTE* word) { return (word[0] << 8) | word[1]; }
40
41static CFStringRef getPostScriptName(CFStringRef faceName, HDC dc)
42{
43    const DWORD cMaxNameTableSize = 1024 * 1024;
44
45    static HashMap<String, RetainPtr<CFStringRef> > nameMap;
46
47    // Check our hash first.
48    String faceString(faceName);
49    RetainPtr<CFStringRef> result = nameMap.get(faceString);
50    if (result)
51        return result.get();
52
53    // We need to obtain the PostScript name from the name table and use it instead,.
54    DWORD bufferSize = GetFontData(dc, 'eman', 0, NULL, 0); // "name" backwards
55    if (bufferSize == 0 || bufferSize == GDI_ERROR || bufferSize > cMaxNameTableSize)
56        return NULL;
57
58    Vector<BYTE> bufferVector(bufferSize);
59    BYTE* buffer = bufferVector.data();
60    if (GetFontData(dc, 'eman', 0, buffer, bufferSize) == GDI_ERROR)
61        return NULL;
62
63    if (bufferSize < 6)
64        return NULL;
65
66    USHORT numberOfRecords = readBigEndianWord(buffer + 2);
67    UINT stringsOffset = readBigEndianWord(buffer + 4);
68    if (bufferSize < stringsOffset)
69        return NULL;
70
71    BYTE* strings = buffer + stringsOffset;
72
73    // Now walk each name record looking for a Mac or Windows PostScript name.
74    UINT offset = 6;
75    for (int i = 0; i < numberOfRecords; i++) {
76        if (bufferSize < offset + 12)
77            return NULL;
78
79        USHORT platformID = readBigEndianWord(buffer + offset);
80        USHORT encodingID = readBigEndianWord(buffer + offset + 2);
81        USHORT languageID = readBigEndianWord(buffer + offset + 4);
82        USHORT nameID = readBigEndianWord(buffer + offset + 6);
83        USHORT length = readBigEndianWord(buffer + offset + 8);
84        USHORT nameOffset = readBigEndianWord(buffer + offset + 10);
85
86        if (platformID == 3 && encodingID == 1 && languageID == 0x409 && nameID == 6) {
87            // This is a Windows PostScript name and is therefore UTF-16.
88            // Pass Big Endian as the encoding.
89            if (bufferSize < stringsOffset + nameOffset + length)
90                return NULL;
91            result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingUTF16BE, false));
92            break;
93        } else if (platformID == 1 && encodingID == 0 && languageID == 0 && nameID == 6) {
94            // This is a Mac PostScript name and is therefore ASCII.
95            // See http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
96            if (bufferSize < stringsOffset + nameOffset + length)
97                return NULL;
98            result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingASCII, false));
99            break;
100        }
101
102        offset += 12;
103    }
104
105    if (result)
106        nameMap.set(faceString, result);
107    return result.get();
108}
109
110void FontPlatformData::platformDataInit(HFONT font, float size, HDC hdc, WCHAR* faceName)
111{
112    LOGFONT logfont;
113    GetObject(font, sizeof(logfont), &logfont);
114    m_cgFont.adoptCF(CGFontCreateWithPlatformFont(&logfont));
115}
116
117FontPlatformData::FontPlatformData(HFONT hfont, CGFontRef font, float size, bool bold, bool oblique, bool useGDI)
118    : m_syntheticBold(bold)
119    , m_syntheticOblique(oblique)
120    , m_orientation(Horizontal)
121    , m_textOrientation(TextOrientationVerticalRight)
122    , m_size(size)
123    , m_widthVariant(RegularWidth)
124    , m_font(RefCountedGDIHandle<HFONT>::create(hfont))
125    , m_cgFont(font)
126    , m_isColorBitmapFont(false)
127    , m_useGDI(useGDI)
128{
129}
130
131FontPlatformData::~FontPlatformData()
132{
133}
134
135void FontPlatformData::platformDataInit(const FontPlatformData& source)
136{
137    m_font = source.m_font;
138    m_cgFont = source.m_cgFont;
139    m_useGDI = source.m_useGDI;
140}
141
142const FontPlatformData& FontPlatformData::platformDataAssign(const FontPlatformData& other)
143{
144    m_font = other.m_font;
145    m_cgFont = other.m_cgFont;
146    m_useGDI = other.m_useGDI;
147
148    return *this;
149}
150
151bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const
152{
153    return m_font == other.m_font
154        && m_cgFont == other.m_cgFont
155        && m_useGDI == other.m_useGDI;
156}
157
158}
159