text: // Emacs style mode select   -*- C++ -*- 
  //-----------------------------------------------------------------------------
  //
  // Copyright(C) 1993-1996 Id Software, Inc.
  // Copyright(C) 2006 Simon Howard
  //
  // This program is free software; you can redistribute it and/or
  // modify it under the terms of the GNU General Public License
  // as published by the Free Software Foundation; either version 2
  // of the License, or (at your option) any later version.
  //
  // This program 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 General Public License for more details.
  //
  // You should have received a copy of the GNU General Public License
  // along with this program; if not, write to the Free Software
  // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  // 02111-1307, USA.
  //
  // DESCRIPTION:
  //      Pixel-doubling scale up functions.
  //
  //-----------------------------------------------------------------------------
  
  
  #ifndef __I_SCALE__
  #define __I_SCALE__
  
  #include "doomtype.h"
  
  void I_InitScale(byte *_src_buffer, byte *_dest_buffer, int _dest_pitch);
  
  // Scaled modes (direct multiples of 320x200)
  
  extern screen_mode_t mode_scale_1x;
  extern screen_mode_t mode_scale_2x;
  extern screen_mode_t mode_scale_3x;
  extern screen_mode_t mode_scale_4x;
  extern screen_mode_t mode_scale_5x;
  
  // Vertically stretched modes (320x200 -> multiples of 320x240)
  
  extern screen_mode_t mode_stretch_1x;
  extern screen_mode_t mode_stretch_2x;
  extern screen_mode_t mode_stretch_3x;
  extern screen_mode_t mode_stretch_4x;
  extern screen_mode_t mode_stretch_5x;
  
  // Horizontally squashed modes (320x200 -> multiples of 256x200)
  
  extern screen_mode_t mode_squash_1x;
  extern screen_mode_t mode_squash_2x;
  extern screen_mode_t mode_squash_3x;
  extern screen_mode_t mode_squash_4x;
  extern screen_mode_t mode_squash_5x;
  
  #endif /* #ifndef __I_SCALE__ */
  
  