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/*
* Copyright (C) 2007 Apple Computer, Inc.
* Copyright (c) 2007, 2008, 2009, Google Inc. All rights reserved.
* Copyright (C) 2010 Company 100, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FontCustomPlatformData.h"
#if OS(WINDOWS)
#include "OpenTypeUtilities.h"
#elif OS(UNIX)
#include "SkStream.h"
#endif
#include "FontPlatformData.h"
#include "LayoutTestSupport.h"
#include "NotImplemented.h"
#include "OpenTypeSanitizer.h"
#include "SharedBuffer.h"
#if OS(WINDOWS)
#include <objbase.h>
#include <wtf/text/Base64.h>
#elif OS(UNIX)
#include <cstring>
#endif
namespace WebCore {
FontCustomPlatformData::~FontCustomPlatformData()
{
#if OS(WINDOWS)
if (m_fontReference)
RemoveFontMemResourceEx(m_fontReference);
#elif OS(UNIX)
if (m_fontReference)
m_fontReference->unref();
#endif
}
FontPlatformData FontCustomPlatformData::fontPlatformData(int size, bool bold, bool italic, FontOrientation orientation,
TextOrientation textOrientation, FontWidthVariant, FontRenderingMode mode)
{
#if OS(WINDOWS)
ASSERT(m_fontReference);
LOGFONT logFont;
// m_name comes from createUniqueFontName, which, in turn, gets
// it from base64-encoded uuid (128-bit). So, m_name
// can never be longer than LF_FACESIZE (32).
if (m_name.length() + 1 >= LF_FACESIZE) {
ASSERT_NOT_REACHED();
return FontPlatformData();
}
memcpy(logFont.lfFaceName, m_name.charactersWithNullTermination(),
sizeof(logFont.lfFaceName[0]) * (1 + m_name.length()));
// FIXME: almost identical to FillLogFont in FontCacheWin.cpp.
// Need to refactor.
logFont.lfHeight = -size;
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 = isRunningLayoutTest() ?
NONANTIALIASED_QUALITY :
DEFAULT_QUALITY; // Honor user's desktop settings.
logFont.lfPitchAndFamily = DEFAULT_PITCH | FF_DONTCARE;
logFont.lfItalic = italic;
logFont.lfWeight = bold ? FW_BOLD : FW_DONTCARE;
HFONT hfont = CreateFontIndirect(&logFont);
return FontPlatformData(hfont, size, orientation);
#elif OS(UNIX)
ASSERT(m_fontReference);
return FontPlatformData(m_fontReference, "", size, bold && !m_fontReference->isBold(), italic && !m_fontReference->isItalic(), orientation, textOrientation);
#else
notImplemented();
return FontPlatformData();
#endif
}
#if OS(WINDOWS)
// Creates a unique and unpredictable font name, in order to avoid collisions and to
// not allow access from CSS.
static String createUniqueFontName()
{
GUID fontUuid;
CoCreateGuid(&fontUuid);
String fontName = base64Encode(reinterpret_cast<char*>(&fontUuid), sizeof(fontUuid));
ASSERT(fontName.length() < LF_FACESIZE);
return fontName;
}
#endif
#if OS(UNIX)
class RemoteFontStream : public SkStream {
public:
explicit RemoteFontStream(PassRefPtr<SharedBuffer> buffer)
: m_buffer(buffer)
, m_offset(0)
{
}
virtual ~RemoteFontStream()
{
}
virtual bool rewind()
{
m_offset = 0;
return true;
}
virtual size_t read(void* buffer, size_t size)
{
if (!buffer && !size) {
// This is request for the length of the stream.
return m_buffer->size();
}
// This is a request to read bytes or skip bytes (when buffer is 0).
if (!m_buffer->data() || !m_buffer->size())
return 0;
size_t left = m_buffer->size() - m_offset;
size_t bytesToConsume = std::min(left, size);
if (buffer)
std::memcpy(buffer, m_buffer->data() + m_offset, bytesToConsume);
m_offset += bytesToConsume;
return bytesToConsume;
}
private:
RefPtr<SharedBuffer> m_buffer;
size_t m_offset;
};
#endif
FontCustomPlatformData* createFontCustomPlatformData(SharedBuffer* buffer)
{
ASSERT_ARG(buffer, buffer);
#if USE(OPENTYPE_SANITIZER)
OpenTypeSanitizer sanitizer(buffer);
RefPtr<SharedBuffer> transcodeBuffer = sanitizer.sanitize();
if (!transcodeBuffer)
return 0; // validation failed.
buffer = transcodeBuffer.get();
#endif
#if OS(WINDOWS)
// Introduce the font to GDI. AddFontMemResourceEx should be used with care, 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).
String fontName = createUniqueFontName();
HANDLE fontReference = renameAndActivateFont(buffer, fontName);
if (!fontReference)
return 0;
return new FontCustomPlatformData(fontReference, fontName);
#elif OS(UNIX)
RemoteFontStream* stream = new RemoteFontStream(buffer);
SkTypeface* typeface = SkTypeface::CreateFromStream(stream);
stream->unref();
if (!typeface)
return 0;
return new FontCustomPlatformData(typeface);
#else
notImplemented();
return 0;
#endif
}
bool FontCustomPlatformData::supportsFormat(const String& format)
{
return equalIgnoringCase(format, "truetype") || equalIgnoringCase(format, "opentype")
#if USE(OPENTYPE_SANITIZER)
|| equalIgnoringCase(format, "woff")
#endif
;
}
}
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