src/subtitles/libssf/FontWrapper.cpp

   1 /*
   2  *      Copyright (C) 2003-2006 Gabest
   3  *      http://www.gabest.org
   4  *
   5  *  This Program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This Program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GNU Make; see the file COPYING.  If not, write to
  17  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *  http://www.gnu.org/copyleft/gpl.html
  19  *
  20  */
  21
  22 #include "stdafx.h"
  23 #include "FontWrapper.h"
  24
  25 namespace ssf
  26 {
  27         FontWrapper::FontWrapper(HDC hDC, HFONT hFont, const CStringW& key)
  28                 : m_hFont(hFont)
  29                 , m_key(key)
  30         {
  31                 HFONT hFontOld = SelectFont(hDC, hFont);
  32
  33                 GetTextMetrics(hDC, &m_tm);
  34
  35                 if(DWORD nNumPairs = GetKerningPairs(hDC, 0, NULL))
  36                 {
  37                         KERNINGPAIR* kp = new KERNINGPAIR[nNumPairs];
  38                         GetKerningPairs(hDC, nNumPairs, kp);
  39                         for(DWORD i = 0; i < nNumPairs; i++)
  40                                 m_kerning[(kp[i].wFirst<<16)|kp[i].wSecond] = kp[i].iKernAmount;
  41                         delete [] kp;
  42                 }
  43
  44                 SelectFont(hDC, hFontOld);
  45         }
  46
  47         FontWrapper::~FontWrapper()
  48         {
  49                 DeleteFont(m_hFont);
  50         }
  51
  52         int FontWrapper::GetKernAmount(WCHAR c1, WCHAR c2)
  53         {
  54                 int size = 0;
  55                 return m_kerning.Lookup((c1<<16)|c2, size) ? size : 0;
  56         }
  57 }