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/*
* This file is part of the internal font implementation. It should not be included by anyone other than
* FontMac.cpp, FontWin.cpp and Font.cpp.
*
* Copyright (C) 2006, 2007 Apple Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "FontPlatformData.h"
#include "PlatformString.h"
#include "StringHash.h"
#include <ApplicationServices/ApplicationServices.h>
#include <wtf/HashMap.h>
#include <wtf/RetainPtr.h>
#include <wtf/Vector.h>
using std::min;
namespace WebCore {
static const int Bold = (1 << 0);
static const int Italic = (1 << 1);
static const int BoldOblique = (1 << 2);
static inline USHORT readBigEndianWord(const BYTE* word) { return (word[0] << 8) | word[1]; }
static CFStringRef getPostScriptName(CFStringRef faceName, HDC dc)
{
const DWORD cMaxNameTableSize = 1024 * 1024;
static HashMap<String, RetainPtr<CFStringRef> > nameMap;
// Check our hash first.
String faceString(faceName);
RetainPtr<CFStringRef> result = nameMap.get(faceString);
if (result)
return result.get();
// We need to obtain the PostScript name from the name table and use it instead,.
DWORD bufferSize = GetFontData(dc, 'eman', 0, NULL, 0); // "name" backwards
if (bufferSize == 0 || bufferSize == GDI_ERROR || bufferSize > cMaxNameTableSize)
return NULL;
Vector<BYTE> bufferVector(bufferSize);
BYTE* buffer = bufferVector.data();
if (GetFontData(dc, 'eman', 0, buffer, bufferSize) == GDI_ERROR)
return NULL;
if (bufferSize < 6)
return NULL;
USHORT numberOfRecords = readBigEndianWord(buffer + 2);
UINT stringsOffset = readBigEndianWord(buffer + 4);
if (bufferSize < stringsOffset)
return NULL;
BYTE* strings = buffer + stringsOffset;
// Now walk each name record looking for a Mac or Windows PostScript name.
UINT offset = 6;
for (int i = 0; i < numberOfRecords; i++) {
if (bufferSize < offset + 12)
return NULL;
USHORT platformID = readBigEndianWord(buffer + offset);
USHORT encodingID = readBigEndianWord(buffer + offset + 2);
USHORT languageID = readBigEndianWord(buffer + offset + 4);
USHORT nameID = readBigEndianWord(buffer + offset + 6);
USHORT length = readBigEndianWord(buffer + offset + 8);
USHORT nameOffset = readBigEndianWord(buffer + offset + 10);
if (platformID == 3 && encodingID == 1 && languageID == 0x409 && nameID == 6) {
// This is a Windows PostScript name and is therefore UTF-16.
// Pass Big Endian as the encoding.
if (bufferSize < stringsOffset + nameOffset + length)
return NULL;
result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingUTF16BE, false));
break;
} else if (platformID == 1 && encodingID == 0 && languageID == 0 && nameID == 6) {
// This is a Mac PostScript name and is therefore ASCII.
// See http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
if (bufferSize < stringsOffset + nameOffset + length)
return NULL;
result.adoptCF(CFStringCreateWithBytes(NULL, strings + nameOffset, length, kCFStringEncodingASCII, false));
break;
}
offset += 12;
}
if (result)
nameMap.set(faceString, result);
return result.get();
}
static int CALLBACK enumStylesCallback(const LOGFONT* logFont, const TEXTMETRIC* metrics, DWORD fontType, LPARAM lParam)
{
int *style = reinterpret_cast<int*>(lParam);
// FIXME: In order to accommodate Lucida we go ahead and consider a weight of 600 to be bold.
// This does mean we'll consider demibold and semibold fonts on windows to also be bold. This
// is rare enough that it seems like an ok hack for now.
if (logFont->lfWeight >= 600) {
if (logFont->lfItalic)
*style |= BoldOblique;
else
*style |= Bold;
} else if (logFont->lfItalic)
*style |= Italic;
return 1;
}
FontPlatformData::FontPlatformData(HFONT font, float size, bool bold, bool oblique, bool useGDI)
: m_font(font)
, m_size(size)
, m_cgFont(0)
, m_syntheticBold(false)
, m_syntheticOblique(false)
, m_useGDI(useGDI)
{
HDC hdc = GetDC(0);
SaveDC(hdc);
SelectObject(hdc, font);
UINT bufferSize = GetOutlineTextMetrics(hdc, 0, NULL);
ASSERT_WITH_MESSAGE(bufferSize != 0, "Bitmap fonts not supported with CoreGraphics.");
if (bufferSize != 0) {
OUTLINETEXTMETRICW* metrics = (OUTLINETEXTMETRICW*)malloc(bufferSize);
GetOutlineTextMetricsW(hdc, bufferSize, metrics);
WCHAR* faceName = (WCHAR*)((uintptr_t)metrics + (uintptr_t)metrics->otmpFaceName);
if (!useGDI && (bold || oblique)) {
LOGFONT logFont;
int len = min((int)wcslen(faceName), LF_FACESIZE - 1);
memcpy(logFont.lfFaceName, faceName, len * sizeof(WORD));
logFont.lfFaceName[len] = '\0';
logFont.lfCharSet = metrics->otmTextMetrics.tmCharSet;
logFont.lfPitchAndFamily = 0;
int styles = 0;
EnumFontFamiliesEx(hdc, &logFont, enumStylesCallback, reinterpret_cast<LPARAM>(&styles), 0);
// Check if we need to synthesize bold or oblique. The rule that complicates things here
// is that if the requested font is bold and oblique, and both a bold font and an oblique font
// exist, the bold font should be used, and oblique synthesized.
if (bold && oblique) {
if (styles == 0) {
m_syntheticBold = true;
m_syntheticOblique = true;
} else if (styles & Bold)
m_syntheticOblique = true;
else if (styles & Italic)
m_syntheticBold = true;
} else if (bold && (!(styles & Bold)))
m_syntheticBold = true;
else if (oblique && !(styles & Italic))
m_syntheticOblique = true;
}
// Try the face name first. Windows may end up localizing this name, and CG doesn't know about
// the localization. If the create fails, we'll try the PostScript name.
RetainPtr<CFStringRef> fullName(AdoptCF, CFStringCreateWithCharacters(NULL, (const UniChar*)faceName, wcslen(faceName)));
m_cgFont = CGFontCreateWithFontName(fullName.get());
if (!m_cgFont) {
CFStringRef postScriptName = getPostScriptName(fullName.get(), hdc);
if (postScriptName) {
m_cgFont = CGFontCreateWithFontName(postScriptName);
ASSERT(m_cgFont);
}
}
free(metrics);
}
RestoreDC(hdc, -1);
ReleaseDC(0, hdc);
}
FontPlatformData::FontPlatformData(float size, bool bold, bool oblique)
: m_font(0)
, m_size(size)
, m_cgFont(0)
, m_syntheticBold(bold)
, m_syntheticOblique(oblique)
, m_useGDI(false)
{
}
FontPlatformData::FontPlatformData(CGFontRef font, float size, bool bold, bool oblique)
: m_font(0)
, m_size(size)
, m_cgFont(font)
, m_syntheticBold(bold)
, m_syntheticOblique(oblique)
, m_useGDI(false)
{
}
FontPlatformData::~FontPlatformData()
{
}
}
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