text: /*
   * 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, 2008 Apple Inc.
   * Copyright (C) 2007 Alp Toker
   * Copyright (C) 2008, 2010, 2011 Brent Fulgham
   *
   * 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 <wtf/HashMap.h>
  #include <wtf/RetainPtr.h>
  #include <wtf/Vector.h>
  #include <wtf/text/StringHash.h>
  
  #include <cairo-win32.h>
  
  using namespace std;
  
  namespace WebCore {
  
  void FontPlatformData::platformDataInit(HFONT font, float size, HDC hdc, WCHAR* faceName)
  {
      cairo_font_face_t* fontFace = cairo_win32_font_face_create_for_hfont(font);
  
      cairo_matrix_t sizeMatrix, ctm;
      cairo_matrix_init_identity(&ctm);
      cairo_matrix_init_scale(&sizeMatrix, size, size);
  
      static cairo_font_options_t* fontOptions = 0;
      if (!fontOptions) {
         fontOptions = cairo_font_options_create();
         cairo_font_options_set_antialias(fontOptions, CAIRO_ANTIALIAS_SUBPIXEL);
      }
  
      m_scaledFont = cairo_scaled_font_create(fontFace, &sizeMatrix, &ctm, fontOptions);
      cairo_font_face_destroy(fontFace);
  }
  
  FontPlatformData::FontPlatformData(cairo_font_face_t* fontFace, float size, bool bold, bool oblique)
      : m_font(0)
      , m_size(size)
      , m_orientation(Horizontal)
      , m_textOrientation(TextOrientationVerticalRight)
      , m_widthVariant(RegularWidth)
      , m_scaledFont(0)
      , m_isColorBitmapFont(false)
      , m_syntheticBold(bold)
      , m_syntheticOblique(oblique)
      , m_useGDI(false)
  {
     cairo_matrix_t fontMatrix;
     cairo_matrix_init_scale(&fontMatrix, size, size);
     cairo_matrix_t ctm;
     cairo_matrix_init_identity(&ctm);
     cairo_font_options_t* options = cairo_font_options_create();
  
     // We force antialiasing and disable hinting to provide consistent
     // typographic qualities for custom fonts on all platforms.
     cairo_font_options_set_hint_style(options, CAIRO_HINT_STYLE_NONE);
     cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
  
      if (syntheticOblique()) {
          static const float syntheticObliqueSkew = -tanf(14 * acosf(0) / 90);
          cairo_matrix_t skew = {1, 0, syntheticObliqueSkew, 1, 0, 0};
          cairo_matrix_multiply(&fontMatrix, &skew, &fontMatrix);
      }
  
     m_scaledFont = cairo_scaled_font_create(fontFace, &fontMatrix, &ctm, options);
     cairo_font_options_destroy(options);
  }
  
  FontPlatformData::~FontPlatformData()
  {
      if (m_scaledFont && m_scaledFont != hashTableDeletedFontValue())
          cairo_scaled_font_destroy(m_scaledFont);
  }
  
  void FontPlatformData::platformDataInit(const FontPlatformData& source)
  {
      m_font = source.m_font;
      m_useGDI = source.m_useGDI;
      m_scaledFont = 0;
  
      if (source.m_scaledFont)
          m_scaledFont = cairo_scaled_font_reference(source.m_scaledFont);
  }
  
  const FontPlatformData& FontPlatformData::platformDataAssign(const FontPlatformData& other)
  {
      m_font = other.m_font;
      m_useGDI = other.m_useGDI;
  
      if (m_scaledFont && m_scaledFont != hashTableDeletedFontValue())
          cairo_scaled_font_destroy(m_scaledFont);
  
      m_scaledFont = cairo_scaled_font_reference(other.m_scaledFont);
  
      return *this;
  }
  
  bool FontPlatformData::platformIsEqual(const FontPlatformData& other) const
  {
      return m_font == other.m_font
          && m_scaledFont == other.m_scaledFont
          && m_useGDI == other.m_useGDI;
  }
  
  }
  