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+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// Copyright(C) 1993-1996 Id Software, Inc.
+// Copyright(C) 2005 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:
+// System specific interface stuff.
+//
+//-----------------------------------------------------------------------------
+
+
+#ifndef __R_DRAW__
+#define __R_DRAW__
+
+
+
+
+extern lighttable_t* dc_colormap;
+extern int dc_x;
+extern int dc_yl;
+extern int dc_yh;
+extern fixed_t dc_iscale;
+extern fixed_t dc_texturemid;
+
+// first pixel in a column
+extern byte* dc_source;
+
+
+// The span blitting interface.
+// Hook in assembler or system specific BLT
+// here.
+void R_DrawColumn (void);
+void R_DrawColumnLow (void);
+
+// The Spectre/Invisibility effect.
+void R_DrawFuzzColumn (void);
+void R_DrawFuzzColumnLow (void);
+
+// Draw with color translation tables,
+// for player sprite rendering,
+// Green/Red/Blue/Indigo shirts.
+void R_DrawTranslatedColumn (void);
+void R_DrawTranslatedColumnLow (void);
+
+void
+R_VideoErase
+( unsigned ofs,
+ int count );
+
+extern int ds_y;
+extern int ds_x1;
+extern int ds_x2;
+
+extern lighttable_t* ds_colormap;
+
+extern fixed_t ds_xfrac;
+extern fixed_t ds_yfrac;
+extern fixed_t ds_xstep;
+extern fixed_t ds_ystep;
+
+// start of a 64*64 tile image
+extern byte* ds_source;
+
+extern byte* translationtables;
+extern byte* dc_translation;
+
+
+// Span blitting for rows, floor/ceiling.
+// No Sepctre effect needed.
+void R_DrawSpan (void);
+
+// Low resolution mode, 160x200?
+void R_DrawSpanLow (void);
+
+
+void
+R_InitBuffer
+( int width,
+ int height );
+
+
+// Initialize color translation tables,
+// for player rendering etc.
+void R_InitTranslationTables (void);
+
+
+
+// Rendering function.
+void R_FillBackScreen (void);
+
+// If the view size is not full screen, draws a border around it.
+void R_DrawViewBorder (void);
+
+
+
+#endif