fontcustomplatformdatacairo.cpp

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C++ 代码 · 共 62 行

/*
 * Copyright (C) 2007, 2008 Apple Computer, 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 "FontCustomPlatformDataCairo.h"

#include "SharedBuffer.h"
#include "FontPlatformData.h"
#include <wtf/RetainPtr.h>

namespace WebCore {

FontCustomPlatformDataCairo::~FontCustomPlatformDataCairo()
{
   cairo_font_face_destroy(m_fontFace);
}

FontPlatformData FontCustomPlatformDataCairo::fontPlatformData(int size, bool bold, bool italic)
{
    return FontPlatformData(m_fontFace, size, bold, italic);
}

static void releaseData(void* data)
{
    static_cast<SharedBuffer*>(data)->deref();
}

FontCustomPlatformDataCairo* createFontCustomPlatformData(SharedBuffer* buffer)
{
    ASSERT_ARG(buffer, buffer);

    buffer->ref();
    HFONT font = reinterpret_cast<HFONT>(buffer);
    cairo_font_face_t* fontFace = cairo_win32_font_face_create_for_hfont(font);
    if (!fontFace)
       return 0;

    static cairo_user_data_key_t bufferKey;
    cairo_font_face_set_user_data(fontFace, &bufferKey, buffer, releaseData);

    return new FontCustomPlatformDataCairo(fontFace);
}

}