webkit/src/WebCore/platform/graphics/win/FontCustomPlatformData.cpp - toolchain/benchmark - Git at Google

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * 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 "FontCustomPlatformData.h"

 #include "Base64.h"
 #include "FontPlatformData.h"
 #include "OpenTypeUtilities.h"
 #include "SharedBuffer.h"
 #include "SoftLinking.h"
 #include <ApplicationServices/ApplicationServices.h>
 #include <WebKitSystemInterface/WebKitSystemInterface.h>
 #include <wtf/RetainPtr.h>

 // From t2embapi.h, which is missing from the Microsoft Platform SDK.
 typedef unsigned long(WINAPIV *READEMBEDPROC) (void*, void*, unsigned long);
 struct TTLOADINFO;
 #define TTLOAD_PRIVATE 0x00000001
 #define LICENSE_PREVIEWPRINT 0x0004
 #define E_NONE 0x0000L

 namespace WebCore {

 using namespace std;

 SOFT_LINK_LIBRARY(T2embed);
 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));
 SOFT_LINK(T2embed, TTGetNewFontName, LONG, __stdcall, (HANDLE* phFontReference, LPWSTR szWinFamilyName, long cchMaxWinName, LPSTR szMacFamilyName, long cchMaxMacName), (phFontReference, szWinFamilyName, cchMaxWinName, szMacFamilyName, cchMaxMacName));
 SOFT_LINK(T2embed, TTDeleteEmbeddedFont, LONG, __stdcall, (HANDLE hFontReference, ULONG ulFlags, ULONG* pulStatus), (hFontReference, ulFlags, pulStatus));

 FontCustomPlatformData::~FontCustomPlatformData()
 {
     CGFontRelease(m_cgFont);
     if (m_fontReference) {
         if (m_name.isNull()) {
             ASSERT(T2embedLibrary());
             ULONG status;
             TTDeleteEmbeddedFont(m_fontReference, 0, &status);
         } else
             RemoveFontMemResourceEx(m_fontReference);
     }
 }

 FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontRenderingMode renderingMode)
 {
     ASSERT(m_cgFont);
     ASSERT(m_fontReference);
     ASSERT(T2embedLibrary());

     LOGFONT& logFont = *static_cast<LOGFONT*>(malloc(sizeof(LOGFONT)));
     if (m_name.isNull())
         TTGetNewFontName(&m_fontReference, logFont.lfFaceName, LF_FACESIZE, 0, 0);
     else
         memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(), sizeof(logFont.lfFaceName[0]) * min(static_cast<size_t>(LF_FACESIZE), 1 + m_name.length()));

     logFont.lfHeight = -size;
     if (renderingMode == NormalRenderingMode)
         logFont.lfHeight *= 32;
     logFont.lfWidth = 0;
     logFont.lfEscapement = 0;
     logFont.lfOrientation = 0;
     logFont.lfUnderline = false;
     logFont.lfStrikeOut = false;
     logFont.lfCharSet = DEFAULT_CHARSET;
     logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS;
     logFont.lfQuality = CLEARTYPE_QUALITY;
     logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
     logFont.lfItalic = italic;
     logFont.lfWeight = bold ? 700 : 400;

     HFONT hfont = CreateFontIndirect(&logFont);
     wkSetFontPlatformInfo(m_cgFont, &logFont, free);
     return FontPlatformData(hfont, m_cgFont, size, bold, italic, renderingMode == AlternateRenderingMode);
 }

 const void* getData(void* info)
 {
     SharedBuffer* buffer = static_cast<SharedBuffer*>(info);
     buffer->ref();
     return (void*)buffer->data();
 }

 void releaseData(void* info, const void* data)
 {
     static_cast<SharedBuffer*>(info)->deref();
 }

 size_t getBytesWithOffset(void *info, void* buffer, size_t offset, size_t count)
 {
     SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
     size_t availBytes = count;
     if (offset + count > sharedBuffer->size())
         availBytes -= (offset + count) - sharedBuffer->size();
     memcpy(buffer, sharedBuffer->data() + offset, availBytes);
     return availBytes;
 }

 // Streams the concatenation of a header and font data.
 class EOTStream {
 public:
     EOTStream(const EOTHeader& eotHeader, const SharedBuffer* fontData, size_t overlayDst, size_t overlaySrc, size_t overlayLength)
         : m_eotHeader(eotHeader)
         , m_fontData(fontData)
         , m_overlayDst(overlayDst)
         , m_overlaySrc(overlaySrc)
         , m_overlayLength(overlayLength)
         , m_offset(0)
         , m_inHeader(true)
     {
     }

     size_t read(void* buffer, size_t count);

 private:
     const EOTHeader& m_eotHeader;
     const SharedBuffer* m_fontData;
     size_t m_overlayDst;
     size_t m_overlaySrc;
     size_t m_overlayLength;
     size_t m_offset;
     bool m_inHeader;
 };

 size_t EOTStream::read(void* buffer, size_t count)
 {
     size_t bytesToRead = count;
     if (m_inHeader) {
         size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count);
         memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader);
         m_offset += bytesFromHeader;
         bytesToRead -= bytesFromHeader;
         if (m_offset == m_eotHeader.size()) {
             m_inHeader = false;
             m_offset = 0;
         }
     }
     if (bytesToRead && !m_inHeader) {
         size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead);
         memcpy(buffer, m_fontData->data() + m_offset, bytesFromData);
         if (m_offset < m_overlayDst + m_overlayLength && m_offset + bytesFromData >= m_overlayDst) {
             size_t dstOffset = max<int>(m_overlayDst - m_offset, 0);
             size_t srcOffset = max<int>(0, m_offset - m_overlayDst);
             size_t bytesToCopy = min(bytesFromData - dstOffset, m_overlayLength - srcOffset);
             memcpy(reinterpret_cast<char*>(buffer) + dstOffset, m_fontData->data() + m_overlaySrc + srcOffset, bytesToCopy);
         }
         m_offset += bytesFromData;
         bytesToRead -= bytesFromData;
     }
     return count - bytesToRead;
 }

 static unsigned long WINAPIV readEmbedProc(void* stream, void* buffer, unsigned long length)
 {
     return static_cast<EOTStream*>(stream)->read(buffer, length);
 }

 // Creates a unique and unpredictable font name, in order to avoid collisions and to
 // not allow access from CSS.
 static String createUniqueFontName()
 {
     Vector<char> fontUuid(sizeof(GUID));
     CoCreateGuid(reinterpret_cast<GUID*>(fontUuid.data()));

     Vector<char> fontNameVector;
     base64Encode(fontUuid, fontNameVector);
     ASSERT(fontNameVector.size() < LF_FACESIZE);
     return String(fontNameVector.data(), fontNameVector.size());
 }

 FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
 {
     ASSERT_ARG(buffer, buffer);
     ASSERT(T2embedLibrary());

     // Get CG to create the font.
     CGDataProviderDirectAccessCallbacks callbacks = { &getData, &releaseData, &getBytesWithOffset, NULL };
     RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateDirectAccess(buffer, buffer->size(), &callbacks));
     CGFontRef cgFont = CGFontCreateWithDataProvider(dataProvider.get());
     if (!cgFont)
         return 0;

     // Introduce the font to GDI. AddFontMemResourceEx cannot be used, because it will pollute the process's
     // font namespace (Windows has no API for creating an HFONT from data without exposing the font to the
     // entire process first). TTLoadEmbeddedFont lets us override the font family name, so using a unique name
     // we avoid namespace collisions.

     String fontName = createUniqueFontName();

     // TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header
     // and prepend it to the font data.
     EOTHeader eotHeader;
     size_t overlayDst;
     size_t overlaySrc;
     size_t overlayLength;
     if (!getEOTHeader(buffer, eotHeader, overlayDst, overlaySrc, overlayLength)) {
         CGFontRelease(cgFont);
         return 0;
     }

     HANDLE fontReference;
     ULONG privStatus;
     ULONG status;
     EOTStream eotStream(eotHeader, buffer, overlayDst, overlaySrc, overlayLength);

     LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0);
     if (loadEmbeddedFontResult == E_NONE)
         fontName = String();
     else {
         fontReference = renameAndActivateFont(buffer, fontName);
         if (!fontReference) {
             CGFontRelease(cgFont);
             return 0;
         }
     }

     return new FontCustomPlatformData(cgFont, fontReference, fontName);
 }

 }
	/*
	* Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
	*
	* 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 "FontCustomPlatformData.h"

	#include "Base64.h"
	#include "FontPlatformData.h"
	#include "OpenTypeUtilities.h"
	#include "SharedBuffer.h"
	#include "SoftLinking.h"
	#include <ApplicationServices/ApplicationServices.h>
	#include <WebKitSystemInterface/WebKitSystemInterface.h>
	#include <wtf/RetainPtr.h>

	// From t2embapi.h, which is missing from the Microsoft Platform SDK.
	typedef unsigned long(WINAPIV READEMBEDPROC) (void, void*, unsigned long);
	struct TTLOADINFO;
	#define TTLOAD_PRIVATE 0x00000001
	#define LICENSE_PREVIEWPRINT 0x0004
	#define E_NONE 0x0000L

	namespace WebCore {

	using namespace std;

	SOFT_LINK_LIBRARY(T2embed);
	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));
	SOFT_LINK(T2embed, TTGetNewFontName, LONG, __stdcall, (HANDLE* phFontReference, LPWSTR szWinFamilyName, long cchMaxWinName, LPSTR szMacFamilyName, long cchMaxMacName), (phFontReference, szWinFamilyName, cchMaxWinName, szMacFamilyName, cchMaxMacName));
	SOFT_LINK(T2embed, TTDeleteEmbeddedFont, LONG, __stdcall, (HANDLE hFontReference, ULONG ulFlags, ULONG* pulStatus), (hFontReference, ulFlags, pulStatus));

	FontCustomPlatformData::~FontCustomPlatformData()
	{
	CGFontRelease(m_cgFont);
	if (m_fontReference) {
	if (m_name.isNull()) {
	ASSERT(T2embedLibrary());
	ULONG status;
	TTDeleteEmbeddedFont(m_fontReference, 0, &status);
	} else
	RemoveFontMemResourceEx(m_fontReference);
	}
	}

	FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontRenderingMode renderingMode)
	{
	ASSERT(m_cgFont);
	ASSERT(m_fontReference);
	ASSERT(T2embedLibrary());

	LOGFONT& logFont = static_cast<LOGFONT>(malloc(sizeof(LOGFONT)));
	if (m_name.isNull())
	TTGetNewFontName(&m_fontReference, logFont.lfFaceName, LF_FACESIZE, 0, 0);
	else
	memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(), sizeof(logFont.lfFaceName[0]) * min(static_cast<size_t>(LF_FACESIZE), 1 + m_name.length()));

	logFont.lfHeight = -size;
	if (renderingMode == NormalRenderingMode)
	logFont.lfHeight *= 32;
	logFont.lfWidth = 0;
	logFont.lfEscapement = 0;
	logFont.lfOrientation = 0;
	logFont.lfUnderline = false;
	logFont.lfStrikeOut = false;
	logFont.lfCharSet = DEFAULT_CHARSET;
	logFont.lfOutPrecision = OUT_TT_ONLY_PRECIS;
	logFont.lfQuality = CLEARTYPE_QUALITY;
	logFont.lfPitchAndFamily = DEFAULT_PITCH \| FF_DONTCARE;
	logFont.lfItalic = italic;
	logFont.lfWeight = bold ? 700 : 400;

	HFONT hfont = CreateFontIndirect(&logFont);
	wkSetFontPlatformInfo(m_cgFont, &logFont, free);
	return FontPlatformData(hfont, m_cgFont, size, bold, italic, renderingMode == AlternateRenderingMode);
	}

	const void* getData(void* info)
	{
	SharedBuffer* buffer = static_cast<SharedBuffer*>(info);
	buffer->ref();
	return (void*)buffer->data();
	}

	void releaseData(void* info, const void* data)
	{
	static_cast<SharedBuffer*>(info)->deref();
	}

	size_t getBytesWithOffset(void info, void buffer, size_t offset, size_t count)
	{
	SharedBuffer* sharedBuffer = static_cast<SharedBuffer*>(info);
	size_t availBytes = count;
	if (offset + count > sharedBuffer->size())
	availBytes -= (offset + count) - sharedBuffer->size();
	memcpy(buffer, sharedBuffer->data() + offset, availBytes);
	return availBytes;
	}

	// Streams the concatenation of a header and font data.
	class EOTStream {
	public:
	EOTStream(const EOTHeader& eotHeader, const SharedBuffer* fontData, size_t overlayDst, size_t overlaySrc, size_t overlayLength)
	: m_eotHeader(eotHeader)
	, m_fontData(fontData)
	, m_overlayDst(overlayDst)
	, m_overlaySrc(overlaySrc)
	, m_overlayLength(overlayLength)
	, m_offset(0)
	, m_inHeader(true)
	{
	}

	size_t read(void* buffer, size_t count);

	private:
	const EOTHeader& m_eotHeader;
	const SharedBuffer* m_fontData;
	size_t m_overlayDst;
	size_t m_overlaySrc;
	size_t m_overlayLength;
	size_t m_offset;
	bool m_inHeader;
	};

	size_t EOTStream::read(void* buffer, size_t count)
	{
	size_t bytesToRead = count;
	if (m_inHeader) {
	size_t bytesFromHeader = min(m_eotHeader.size() - m_offset, count);
	memcpy(buffer, m_eotHeader.data() + m_offset, bytesFromHeader);
	m_offset += bytesFromHeader;
	bytesToRead -= bytesFromHeader;
	if (m_offset == m_eotHeader.size()) {
	m_inHeader = false;
	m_offset = 0;
	}
	}
	if (bytesToRead && !m_inHeader) {
	size_t bytesFromData = min(m_fontData->size() - m_offset, bytesToRead);
	memcpy(buffer, m_fontData->data() + m_offset, bytesFromData);
	if (m_offset < m_overlayDst + m_overlayLength && m_offset + bytesFromData >= m_overlayDst) {
	size_t dstOffset = max<int>(m_overlayDst - m_offset, 0);
	size_t srcOffset = max<int>(0, m_offset - m_overlayDst);
	size_t bytesToCopy = min(bytesFromData - dstOffset, m_overlayLength - srcOffset);
	memcpy(reinterpret_cast<char*>(buffer) + dstOffset, m_fontData->data() + m_overlaySrc + srcOffset, bytesToCopy);
	}
	m_offset += bytesFromData;
	bytesToRead -= bytesFromData;
	}
	return count - bytesToRead;
	}

	static unsigned long WINAPIV readEmbedProc(void* stream, void* buffer, unsigned long length)
	{
	return static_cast<EOTStream*>(stream)->read(buffer, length);
	}

	// Creates a unique and unpredictable font name, in order to avoid collisions and to
	// not allow access from CSS.
	static String createUniqueFontName()
	{
	Vector<char> fontUuid(sizeof(GUID));
	CoCreateGuid(reinterpret_cast<GUID*>(fontUuid.data()));

	Vector<char> fontNameVector;
	base64Encode(fontUuid, fontNameVector);
	ASSERT(fontNameVector.size() < LF_FACESIZE);
	return String(fontNameVector.data(), fontNameVector.size());
	}

	FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
	{
	ASSERT_ARG(buffer, buffer);
	ASSERT(T2embedLibrary());

	// Get CG to create the font.
	CGDataProviderDirectAccessCallbacks callbacks = { &getData, &releaseData, &getBytesWithOffset, NULL };
	RetainPtr<CGDataProviderRef> dataProvider(AdoptCF, CGDataProviderCreateDirectAccess(buffer, buffer->size(), &callbacks));
	CGFontRef cgFont = CGFontCreateWithDataProvider(dataProvider.get());
	if (!cgFont)
	return 0;

	// Introduce the font to GDI. AddFontMemResourceEx cannot be used, because it will pollute the process's
	// font namespace (Windows has no API for creating an HFONT from data without exposing the font to the
	// entire process first). TTLoadEmbeddedFont lets us override the font family name, so using a unique name
	// we avoid namespace collisions.

	String fontName = createUniqueFontName();

	// TTLoadEmbeddedFont works only with Embedded OpenType (.eot) data, so we need to create an EOT header
	// and prepend it to the font data.
	EOTHeader eotHeader;
	size_t overlayDst;
	size_t overlaySrc;
	size_t overlayLength;
	if (!getEOTHeader(buffer, eotHeader, overlayDst, overlaySrc, overlayLength)) {
	CGFontRelease(cgFont);
	return 0;
	}

	HANDLE fontReference;
	ULONG privStatus;
	ULONG status;
	EOTStream eotStream(eotHeader, buffer, overlayDst, overlaySrc, overlayLength);

	LONG loadEmbeddedFontResult = TTLoadEmbeddedFont(&fontReference, TTLOAD_PRIVATE, &privStatus, LICENSE_PREVIEWPRINT, &status, readEmbedProc, &eotStream, const_cast<LPWSTR>(fontName.charactersWithNullTermination()), 0, 0);
	if (loadEmbeddedFontResult == E_NONE)
	fontName = String();
	else {
	fontReference = renameAndActivateFont(buffer, fontName);
	if (!fontReference) {
	CGFontRelease(cgFont);
	return 0;
	}
	}

	return new FontCustomPlatformData(cgFont, fontReference, fontName);
	}

	}