1 /* 2 * Copyright (C) 2007, 2008, 2009 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 <ApplicationServices/ApplicationServices.h> 30 #include <WebKitSystemInterface/WebKitSystemInterface.h> 31 #include <wtf/RetainPtr.h> 32 33 // From t2embapi.h, which is missing from the Microsoft Platform SDK. 34 typedef unsigned long(WINAPIV *READEMBEDPROC) (void*, void*, unsigned long); 35 struct TTLOADINFO; 36 #define TTLOAD_PRIVATE 0x00000001 37 #define LICENSE_PREVIEWPRINT 0x0004 38 #define E_NONE 0x0000L 39 40 namespace WebCore { 41 42 using namespace std; 43 44 SOFT_LINK_LIBRARY(T2embed); 45 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)); 46 SOFT_LINK(T2embed, TTGetNewFontName, LONG, __stdcall, (HANDLE* phFontReference, LPWSTR szWinFamilyName, long cchMaxWinName, LPSTR szMacFamilyName, long cchMaxMacName), (phFontReference, szWinFamilyName, cchMaxWinName, szMacFamilyName, cchMaxMacName)); 47 SOFT_LINK(T2embed, TTDeleteEmbeddedFont, LONG, __stdcall, (HANDLE hFontReference, ULONG ulFlags, ULONG* pulStatus), (hFontReference, ulFlags, pulStatus)); 48 49 FontCustomPlatformData::~FontCustomPlatformData() 50 { 51 CGFontRelease(m_cgFont); 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, FontRenderingMode renderingMode) 63 { 64 ASSERT(wkCanCreateCGFontWithLOGFONT() || m_cgFont); 65 ASSERT(m_fontReference); 66 ASSERT(T2embedLibrary()); 67 68 LOGFONT& logFont = *static_cast<LOGFONT*>(malloc(sizeof(LOGFONT))); 69 if (m_name.isNull()) 70 TTGetNewFontName(&m_fontReference, logFont.lfFaceName, LF_FACESIZE, 0, 0); 71 else 72 memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(), sizeof(logFont.lfFaceName[0]) * min(static_cast<size_t>(LF_FACESIZE), 1 + m_name.length())); 73 74 logFont.lfHeight = -size; 75 if (renderingMode == NormalRenderingMode) 76 logFont.lfHeight *= 32; 77 logFont.lfWidth = 0; 78 logFont.lfEscapement = 0; 79 logFont.lfOrientation = 0; 80 logFont.lfUnderline = false; 81 logFont.lfStrikeOut = false; 82 logFont.lfCharSet = DEFAULT_CHARSET; 83 logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS; 84 logFont.lfQuality = CLEARTYPE_QUALITY; 85 logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE; 86 logFont.lfItalic = italic; 87 logFont.lfWeight = bold ? 700 : 400; 88 89 HFONT hfont = CreateFontIndirect(&logFont); 90 91 if (wkCanCreateCGFontWithLOGFONT()) { 92 RetainPtr<CGFontRef> cgFont(AdoptCF, CGFontCreateWithPlatformFont(&logFont)); 93 return FontPlatformData(hfont, cgFont.get(), size, bold, italic, renderingMode == AlternateRenderingMode); 94 } 95 96 wkSetFontPlatformInfo(m_cgFont, &logFont, free); 97 return FontPlatformData(hfont, m_cgFont, size, bold, italic, renderingMode == AlternateRenderingMode); 98 } 99 100 const void* getData(void* info) 101 { 102 SharedBuffer* buffer = static_cast<SharedBuffer*>(info); 103 buffer->ref(); 104 return (void*)buffer->data(); 105 } 106 107 void releaseData(void* info, const void* data) 108 { 109 static_cast<SharedBuffer*>(info)->deref(); 110 } 111 112 size_t getBytesWithOffset(void *info, void* buffer, size_t offset, size_t count) 113 { 114 SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info); 115 size_t availBytes = count; 116 if (offset + count > sharedBuffer->size()) 117 availBytes -= (offset + count) - sharedBuffer->size(); 118 memcpy(buffer, sharedBuffer->data() + offset, availBytes); 119 return availBytes; 120 } 121 122 // Streams the concatenation of a header and font data. 123 class EOTStream { 124 public: 125 EOTStream(const EOTHeader& eotHeader, const SharedBuffer* fontData, size_t overlayDst, size_t overlaySrc, size_t overlayLength) 126 : m_eotHeader(eotHeader) 127 , m_fontData(fontData) 128 , m_overlayDst(overlayDst) 129 , m_overlaySrc(overlaySrc) 130 , m_overlayLength(overlayLength) 131 , m_offset(0) 132 , m_inHeader(true) 133 { 134 } 135 136 size_t read(void* buffer, size_t count); 137 138 private: 139 const EOTHeader& m_eotHeader; 140 const SharedBuffer* m_fontData; 141 size_t m_overlayDst; 142 size_t m_overlaySrc; 143 size_t m_overlayLength; 144 size_t m_offset; 145 bool m_inHeader; 146 }; 147 148 size_t EOTStream::read(void* buffer, size_t count) 149 { 150 size_t bytesToRead = count; 151 if (m_inHeader) { 152 size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count); 153 memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader); 154 m_offset += bytesFromHeader; 155 bytesToRead -= bytesFromHeader; 156 if (m_offset == m_eotHeader.size()) { 157 m_inHeader = false; 158 m_offset = 0; 159 } 160 } 161 if (bytesToRead && !m_inHeader) { 162 size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead); 163 memcpy(buffer, m_fontData->data() + m_offset, bytesFromData); 164 if (m_offset < m_overlayDst + m_overlayLength && m_offset + bytesFromData >= m_overlayDst) { 165 size_t dstOffset = max<int>(m_overlayDst - m_offset, 0); 166 size_t srcOffset = max<int>(0, m_offset - m_overlayDst); 167 size_t bytesToCopy = min(bytesFromData - dstOffset, m_overlayLength - srcOffset); 168 memcpy(reinterpret_cast<char*>(buffer) + dstOffset, m_fontData->data() + m_overlaySrc + srcOffset, bytesToCopy); 169 } 170 m_offset += bytesFromData; 171 bytesToRead -= bytesFromData; 172 } 173 return count - bytesToRead; 174 } 175 176 static unsigned long WINAPIV readEmbedProc(void* stream, void* buffer, unsigned long length) 177 { 178 return static_cast<EOTStream*>(stream)->read(buffer, length); 179 } 180 181 // Creates a unique and unpredictable font name, in order to avoid collisions and to 182 // not allow access from CSS. 183 static String createUniqueFontName() 184 { 185 Vector<char> fontUuid(sizeof(GUID)); 186 CoCreateGuid(reinterpret_cast<GUID*>(fontUuid.data())); 187 188 Vector<char> fontNameVector; 189 base64Encode(fontUuid, fontNameVector); 190 ASSERT(fontNameVector.size() < LF_FACESIZE); 191 return String(fontNameVector.data(), fontNameVector.size()); 192 } 193 194 FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer) 195 { 196 ASSERT_ARG(buffer, buffer); 197 ASSERT(T2embedLibrary()); 198 199 RetainPtr<CGFontRef> cgFont; 200 if (!wkCanCreateCGFontWithLOGFONT()) { 201 // Get CG to create the font. 202 CGDataProviderDirectAccessCallbacks callbacks = { &getData, &releaseData, &getBytesWithOffset, NULL }; 203 RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateDirectAccess(buffer, buffer->size(), &callbacks)); 204 cgFont.adoptCF(CGFontCreateWithDataProvider(dataProvider.get())); 205 if (!cgFont) 206 return 0; 207 } 208 209 // Introduce the font to GDI. AddFontMemResourceEx cannot be used, because it will pollute the process's 210 // font namespace (Windows has no API for creating an HFONT from data without exposing the font to the 211 // entire process first). TTLoadEmbeddedFont lets us override the font family name, so using a unique name 212 // we avoid namespace collisions. 213 214 String fontName = createUniqueFontName(); 215 216 // TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header 217 // and prepend it to the font data. 218 EOTHeader eotHeader; 219 size_t overlayDst; 220 size_t overlaySrc; 221 size_t overlayLength; 222 if (!getEOTHeader(buffer, eotHeader, overlayDst, overlaySrc, overlayLength)) 223 return 0; 224 225 HANDLE fontReference; 226 ULONG privStatus; 227 ULONG status; 228 EOTStream eotStream(eotHeader, buffer, overlayDst, overlaySrc, overlayLength); 229 230 LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0); 231 if (loadEmbeddedFontResult == E_NONE) 232 fontName = String(); 233 else { 234 fontReference = renameAndActivateFont(buffer, fontName); 235 if (!fontReference) 236 return 0; 237 } 238 239 return new FontCustomPlatformData(cgFont.releaseRef(), fontReference, fontName); 240 } 241 242 } 243