1 /* 2 * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #include "config.h" 22 #include "FontCustomPlatformData.h" 23 24 #include "Base64.h" 25 #include "FontPlatformData.h" 26 #include "OpenTypeUtilities.h" 27 #include "SharedBuffer.h" 28 #include "SoftLinking.h" 29 #include "WOFFFileFormat.h" 30 #include <ApplicationServices/ApplicationServices.h> 31 #include <WebKitSystemInterface/WebKitSystemInterface.h> 32 #include <wtf/RetainPtr.h> 33 34 // From t2embapi.h, which is missing from the Microsoft Platform SDK. 35 typedef unsigned long(WINAPIV *READEMBEDPROC) (void*, void*, unsigned long); 36 struct TTLOADINFO; 37 #define TTLOAD_PRIVATE 0x00000001 38 #define LICENSE_PREVIEWPRINT 0x0004 39 #define E_NONE 0x0000L 40 41 namespace WebCore { 42 43 using namespace std; 44 45 SOFT_LINK_LIBRARY(T2embed); 46 SOFT_LINK(T2embed, TTLoadEmbeddedFont, LONG, __stdcall, (HANDLE* phFontReference, ULONG ulFlags, ULONG* pulPrivStatus, ULONG ulPrivs, ULONG* pulStatus, READEMBEDPROC lpfnReadFromStream, LPVOID lpvReadStream, LPWSTR szWinFamilyName, LPSTR szMacFamilyName, TTLOADINFO* pTTLoadInfo), (phFontReference, ulFlags,pulPrivStatus, ulPrivs, pulStatus, lpfnReadFromStream, lpvReadStream, szWinFamilyName, szMacFamilyName, pTTLoadInfo)); 47 SOFT_LINK(T2embed, TTGetNewFontName, LONG, __stdcall, (HANDLE* phFontReference, LPWSTR szWinFamilyName, long cchMaxWinName, LPSTR szMacFamilyName, long cchMaxMacName), (phFontReference, szWinFamilyName, cchMaxWinName, szMacFamilyName, cchMaxMacName)); 48 SOFT_LINK(T2embed, TTDeleteEmbeddedFont, LONG, __stdcall, (HANDLE hFontReference, ULONG ulFlags, ULONG* pulStatus), (hFontReference, ulFlags, pulStatus)); 49 50 FontCustomPlatformData::~FontCustomPlatformData() 51 { 52 if (m_fontReference) { 53 if (m_name.isNull()) { 54 ASSERT(T2embedLibrary()); 55 ULONG status; 56 TTDeleteEmbeddedFont(m_fontReference, 0, &status); 57 } else 58 RemoveFontMemResourceEx(m_fontReference); 59 } 60 } 61 62 FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation, TextOrientation, FontWidthVariant, FontRenderingMode renderingMode) 63 { 64 ASSERT(m_fontReference); 65 ASSERT(T2embedLibrary()); 66 67 LOGFONT& logFont = *static_cast<LOGFONT*>(malloc(sizeof(LOGFONT))); 68 if (m_name.isNull()) 69 TTGetNewFontName(&m_fontReference, logFont.lfFaceName, LF_FACESIZE, 0, 0); 70 else 71 memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(), sizeof(logFont.lfFaceName[0]) * min(static_cast<size_t>(LF_FACESIZE), 1 + m_name.length())); 72 73 logFont.lfHeight = -size; 74 if (renderingMode == NormalRenderingMode) 75 logFont.lfHeight *= 32; 76 logFont.lfWidth = 0; 77 logFont.lfEscapement = 0; 78 logFont.lfOrientation = 0; 79 logFont.lfUnderline = false; 80 logFont.lfStrikeOut = false; 81 logFont.lfCharSet = DEFAULT_CHARSET; 82 logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS; 83 logFont.lfQuality = CLEARTYPE_QUALITY; 84 logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE; 85 logFont.lfItalic = italic; 86 logFont.lfWeight = bold ? 700 : 400; 87 88 HFONT hfont = CreateFontIndirect(&logFont); 89 90 RetainPtr<CGFontRef> cgFont(AdoptCF, CGFontCreateWithPlatformFont(&logFont)); 91 return FontPlatformData(hfont, cgFont.get(), size, bold, italic, renderingMode == AlternateRenderingMode); 92 } 93 94 // Streams the concatenation of a header and font data. 95 class EOTStream { 96 public: 97 EOTStream(const EOTHeader& eotHeader, const SharedBuffer* fontData, size_t overlayDst, size_t overlaySrc, size_t overlayLength) 98 : m_eotHeader(eotHeader) 99 , m_fontData(fontData) 100 , m_overlayDst(overlayDst) 101 , m_overlaySrc(overlaySrc) 102 , m_overlayLength(overlayLength) 103 , m_offset(0) 104 , m_inHeader(true) 105 { 106 } 107 108 size_t read(void* buffer, size_t count); 109 110 private: 111 const EOTHeader& m_eotHeader; 112 const SharedBuffer* m_fontData; 113 size_t m_overlayDst; 114 size_t m_overlaySrc; 115 size_t m_overlayLength; 116 size_t m_offset; 117 bool m_inHeader; 118 }; 119 120 size_t EOTStream::read(void* buffer, size_t count) 121 { 122 size_t bytesToRead = count; 123 if (m_inHeader) { 124 size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count); 125 memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader); 126 m_offset += bytesFromHeader; 127 bytesToRead -= bytesFromHeader; 128 if (m_offset == m_eotHeader.size()) { 129 m_inHeader = false; 130 m_offset = 0; 131 } 132 } 133 if (bytesToRead && !m_inHeader) { 134 size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead); 135 memcpy(buffer, m_fontData->data() + m_offset, bytesFromData); 136 if (m_offset < m_overlayDst + m_overlayLength && m_offset + bytesFromData >= m_overlayDst) { 137 size_t dstOffset = max<int>(m_overlayDst - m_offset, 0); 138 size_t srcOffset = max<int>(0, m_offset - m_overlayDst); 139 size_t bytesToCopy = min(bytesFromData - dstOffset, m_overlayLength - srcOffset); 140 memcpy(reinterpret_cast<char*>(buffer) + dstOffset, m_fontData->data() + m_overlaySrc + srcOffset, bytesToCopy); 141 } 142 m_offset += bytesFromData; 143 bytesToRead -= bytesFromData; 144 } 145 return count - bytesToRead; 146 } 147 148 static unsigned long WINAPIV readEmbedProc(void* stream, void* buffer, unsigned long length) 149 { 150 return static_cast<EOTStream*>(stream)->read(buffer, length); 151 } 152 153 // Creates a unique and unpredictable font name, in order to avoid collisions and to 154 // not allow access from CSS. 155 static String createUniqueFontName() 156 { 157 GUID fontUuid; 158 CoCreateGuid(&fontUuid); 159 160 String fontName = base64Encode(reinterpret_cast<char*>(&fontUuid), sizeof(fontUuid)); 161 ASSERT(fontName.length() < LF_FACESIZE); 162 return fontName; 163 } 164 165 FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer) 166 { 167 ASSERT_ARG(buffer, buffer); 168 ASSERT(T2embedLibrary()); 169 170 RefPtr<SharedBuffer> sfntBuffer; 171 if (isWOFF(buffer)) { 172 Vector<char> sfnt; 173 if (!convertWOFFToSfnt(buffer, sfnt)) 174 return 0; 175 176 sfntBuffer = SharedBuffer::adoptVector(sfnt); 177 buffer = sfntBuffer.get(); 178 } 179 180 // Introduce the font to GDI. AddFontMemResourceEx cannot be used, because it will pollute the process's 181 // font namespace (Windows has no API for creating an HFONT from data without exposing the font to the 182 // entire process first). TTLoadEmbeddedFont lets us override the font family name, so using a unique name 183 // we avoid namespace collisions. 184 185 String fontName = createUniqueFontName(); 186 187 // TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header 188 // and prepend it to the font data. 189 EOTHeader eotHeader; 190 size_t overlayDst; 191 size_t overlaySrc; 192 size_t overlayLength; 193 if (!getEOTHeader(buffer, eotHeader, overlayDst, overlaySrc, overlayLength)) 194 return 0; 195 196 HANDLE fontReference; 197 ULONG privStatus; 198 ULONG status; 199 EOTStream eotStream(eotHeader, buffer, overlayDst, overlaySrc, overlayLength); 200 201 LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0); 202 if (loadEmbeddedFontResult == E_NONE) 203 fontName = String(); 204 else { 205 fontReference = renameAndActivateFont(buffer, fontName); 206 if (!fontReference) 207 return 0; 208 } 209 210 return new FontCustomPlatformData(fontReference, fontName); 211 } 212 213 bool FontCustomPlatformData::supportsFormat(const String& format) 214 { 215 return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype") || equalIgnoringCase(format, "woff"); 216 } 217 218 } 219