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dvr/app/jni/prboom/r_draw.c
Simon 9138ea77ab Initial Commit of all Source
2016-03-03 22:28:59 +00:00

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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* 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:
* The actual span/column drawing functions.
* Here find the main potential for optimization,
* e.g. inline assembly, different algorithms.
*
*-----------------------------------------------------------------------------*/
#include "doomstat.h"
#include "w_wad.h"
#include "r_main.h"
#include "r_draw.h"
#include "r_filter.h"
#include "v_video.h"
#include "st_stuff.h"
#include "g_game.h"
#include "am_map.h"
#include "lprintf.h"
//
// All drawing to the view buffer is accomplished in this file.
// The other refresh files only know about ccordinates,
// not the architecture of the frame buffer.
// Conveniently, the frame buffer is a linear one,
// and we need only the base address,
// and the total size == width*height*depth/8.,
//
byte *viewimage;
int viewwidth;
int scaledviewwidth;
int viewheight;
int viewwindowx;
int viewwindowy;
// Color tables for different players,
// translate a limited part to another
// (color ramps used for suit colors).
//
// CPhipps - made const*'s
const byte *tranmap; // translucency filter maps 256x256 // phares
const byte *main_tranmap; // killough 4/11/98
//
// R_DrawColumn
// Source is the top of the column to scale.
//
// SoM: OPTIMIZE for ANYRES
typedef enum
{
COL_NONE,
COL_OPAQUE,
COL_TRANS,
COL_FLEXTRANS,
COL_FUZZ,
COL_FLEXADD
} columntype_e;
static int temp_x = 0;
static int tempyl[4], tempyh[4];
static byte byte_tempbuf[MAX_SCREENHEIGHT * 4];
static unsigned short short_tempbuf[MAX_SCREENHEIGHT * 4];
static unsigned int int_tempbuf[MAX_SCREENHEIGHT * 4];
static int startx = 0;
static int temptype = COL_NONE;
static int commontop, commonbot;
static const byte *temptranmap = NULL;
// SoM 7-28-04: Fix the fuzz problem.
static const byte *tempfuzzmap;
//
// Spectre/Invisibility.
//
#define FUZZTABLE 50
// proff 08/17/98: Changed for high-res
//#define FUZZOFF (SCREENWIDTH)
#define FUZZOFF 1
static const int fuzzoffset_org[FUZZTABLE] = {
FUZZOFF,-FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,
FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,
FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,
FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,
FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF,
FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,
FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF
};
static int fuzzoffset[FUZZTABLE];
static int fuzzpos = 0;
// render pipelines
#define RDC_STANDARD 1
#define RDC_TRANSLUCENT 2
#define RDC_TRANSLATED 4
#define RDC_FUZZ 8
// no color mapping
#define RDC_NOCOLMAP 16
// filter modes
#define RDC_DITHERZ 32
#define RDC_BILINEAR 64
#define RDC_ROUNDED 128
draw_vars_t drawvars = {
NULL, // byte_topleft
NULL, // short_topleft
NULL, // int_topleft
0, // byte_pitch
0, // short_pitch
0, // int_pitch
RDRAW_FILTER_POINT, // filterwall
RDRAW_FILTER_POINT, // filterfloor
RDRAW_FILTER_POINT, // filtersprite
RDRAW_FILTER_POINT, // filterz
RDRAW_FILTER_POINT, // filterpatch
RDRAW_MASKEDCOLUMNEDGE_SQUARE, // sprite_edges
RDRAW_MASKEDCOLUMNEDGE_SQUARE, // patch_edges
// 49152 = FRACUNIT * 0.75
// 81920 = FRACUNIT * 1.25
49152 // mag_threshold
};
//
// Error functions that will abort if R_FlushColumns tries to flush
// columns without a column type.
//
static void R_FlushWholeError(void)
{
I_Error("R_FlushWholeColumns called without being initialized.\n");
}
static void R_FlushHTError(void)
{
I_Error("R_FlushHTColumns called without being initialized.\n");
}
static void R_QuadFlushError(void)
{
I_Error("R_FlushQuadColumn called without being initialized.\n");
}
static void (*R_FlushWholeColumns)(void) = R_FlushWholeError;
static void (*R_FlushHTColumns)(void) = R_FlushHTError;
static void (*R_FlushQuadColumn)(void) = R_QuadFlushError;
static void R_FlushColumns(void)
{
if(temp_x != 4 || commontop >= commonbot)
R_FlushWholeColumns();
else
{
R_FlushHTColumns();
R_FlushQuadColumn();
}
temp_x = 0;
}
//
// R_ResetColumnBuffer
//
// haleyjd 09/13/04: new function to call from main rendering loop
// which gets rid of the unnecessary reset of various variables during
// column drawing.
//
void R_ResetColumnBuffer(void)
{
// haleyjd 10/06/05: this must not be done if temp_x == 0!
if(temp_x)
R_FlushColumns();
temptype = COL_NONE;
R_FlushWholeColumns = R_FlushWholeError;
R_FlushHTColumns = R_FlushHTError;
R_FlushQuadColumn = R_QuadFlushError;
}
#define R_DRAWCOLUMN_PIPELINE RDC_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad8
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL8
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz8
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad15
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL15
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz15
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad16
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL16
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz16
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad32
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL32
#include "r_drawflush.inl"
#define R_DRAWCOLUMN_PIPELINE RDC_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz32
#include "r_drawflush.inl"
//
// R_DrawColumn
//
//
// A column is a vertical slice/span from a wall texture that,
// given the DOOM style restrictions on the view orientation,
// will always have constant z depth.
// Thus a special case loop for very fast rendering can
// be used. It has also been used with Wolfenstein 3D.
//
byte *translationtables;
#define R_DRAWCOLUMN_PIPELINE_TYPE RDC_PIPELINE_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BASE RDC_STANDARD
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawColumn8 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad8
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawColumn15 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad15
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawColumn16 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad16
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawColumn32 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad32
#include "r_drawcolpipeline.inl"
#undef R_DRAWCOLUMN_PIPELINE_BASE
#undef R_DRAWCOLUMN_PIPELINE_TYPE
// Here is the version of R_DrawColumn that deals with translucent // phares
// textures and sprites. It's identical to R_DrawColumn except // |
// for the spot where the color index is stuffed into *dest. At // V
// that point, the existing color index and the new color index
// are mapped through the TRANMAP lump filters to get a new color
// index whose RGB values are the average of the existing and new
// colors.
//
// Since we're concerned about performance, the 'translucent or
// opaque' decision is made outside this routine, not down where the
// actual code differences are.
#define R_DRAWCOLUMN_PIPELINE_TYPE RDC_PIPELINE_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BASE RDC_TRANSLUCENT
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTLColumn8 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL8
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTLColumn15 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL15
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTLColumn16 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL16
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTLColumn32 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeTL32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTTL32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadTL32
#include "r_drawcolpipeline.inl"
#undef R_DRAWCOLUMN_PIPELINE_BASE
#undef R_DRAWCOLUMN_PIPELINE_TYPE
//
// R_DrawTranslatedColumn
// Used to draw player sprites
// with the green colorramp mapped to others.
// Could be used with different translation
// tables, e.g. the lighter colored version
// of the BaronOfHell, the HellKnight, uses
// identical sprites, kinda brightened up.
//
#define R_DRAWCOLUMN_PIPELINE_TYPE RDC_PIPELINE_TRANSLATED
#define R_DRAWCOLUMN_PIPELINE_BASE RDC_TRANSLATED
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTranslatedColumn8 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad8
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTranslatedColumn15 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad15
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTranslatedColumn16 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad16
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawTranslatedColumn32 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWhole32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHT32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuad32
#include "r_drawcolpipeline.inl"
#undef R_DRAWCOLUMN_PIPELINE_BASE
#undef R_DRAWCOLUMN_PIPELINE_TYPE
//
// Framebuffer postprocessing.
// Creates a fuzzy image by copying pixels
// from adjacent ones to left and right.
// Used with an all black colormap, this
// could create the SHADOW effect,
// i.e. spectres and invisible players.
//
#define R_DRAWCOLUMN_PIPELINE_TYPE RDC_PIPELINE_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BASE RDC_FUZZ
#define R_DRAWCOLUMN_PIPELINE_BITS 8
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawFuzzColumn8 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz8
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz8
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz8
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 15
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawFuzzColumn15 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz15
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz15
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz15
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 16
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawFuzzColumn16 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz16
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz16
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz16
#include "r_drawcolpipeline.inl"
#define R_DRAWCOLUMN_PIPELINE_BITS 32
#define R_DRAWCOLUMN_FUNCNAME_COMPOSITE(postfix) R_DrawFuzzColumn32 ## postfix
#define R_FLUSHWHOLE_FUNCNAME R_FlushWholeFuzz32
#define R_FLUSHHEADTAIL_FUNCNAME R_FlushHTFuzz32
#define R_FLUSHQUAD_FUNCNAME R_FlushQuadFuzz32
#include "r_drawcolpipeline.inl"
#undef R_DRAWCOLUMN_PIPELINE_BASE
#undef R_DRAWCOLUMN_PIPELINE_TYPE
static R_DrawColumn_f drawcolumnfuncs[VID_MODEMAX][RDRAW_FILTER_MAXFILTERS][RDRAW_FILTER_MAXFILTERS][RDC_PIPELINE_MAXPIPELINES] = {
{
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn8_PointUV,
R_DrawTLColumn8_PointUV,
R_DrawTranslatedColumn8_PointUV,
R_DrawFuzzColumn8_PointUV,},
{R_DrawColumn8_LinearUV,
R_DrawTLColumn8_LinearUV,
R_DrawTranslatedColumn8_LinearUV,
R_DrawFuzzColumn8_LinearUV,},
{R_DrawColumn8_RoundedUV,
R_DrawTLColumn8_RoundedUV,
R_DrawTranslatedColumn8_RoundedUV,
R_DrawFuzzColumn8_RoundedUV,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn8_PointUV_PointZ,
R_DrawTLColumn8_PointUV_PointZ,
R_DrawTranslatedColumn8_PointUV_PointZ,
R_DrawFuzzColumn8_PointUV_PointZ,},
{R_DrawColumn8_LinearUV_PointZ,
R_DrawTLColumn8_LinearUV_PointZ,
R_DrawTranslatedColumn8_LinearUV_PointZ,
R_DrawFuzzColumn8_LinearUV_PointZ,},
{R_DrawColumn8_RoundedUV_PointZ,
R_DrawTLColumn8_RoundedUV_PointZ,
R_DrawTranslatedColumn8_RoundedUV_PointZ,
R_DrawFuzzColumn8_RoundedUV_PointZ,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn8_PointUV_LinearZ,
R_DrawTLColumn8_PointUV_LinearZ,
R_DrawTranslatedColumn8_PointUV_LinearZ,
R_DrawFuzzColumn8_PointUV_LinearZ,},
{R_DrawColumn8_LinearUV_LinearZ,
R_DrawTLColumn8_LinearUV_LinearZ,
R_DrawTranslatedColumn8_LinearUV_LinearZ,
R_DrawFuzzColumn8_LinearUV_LinearZ,},
{R_DrawColumn8_RoundedUV_LinearZ,
R_DrawTLColumn8_RoundedUV_LinearZ,
R_DrawTranslatedColumn8_RoundedUV_LinearZ,
R_DrawFuzzColumn8_RoundedUV_LinearZ,},
},
},
{
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn15_PointUV,
R_DrawTLColumn15_PointUV,
R_DrawTranslatedColumn15_PointUV,
R_DrawFuzzColumn15_PointUV,},
{R_DrawColumn15_LinearUV,
R_DrawTLColumn15_LinearUV,
R_DrawTranslatedColumn15_LinearUV,
R_DrawFuzzColumn15_LinearUV,},
{R_DrawColumn15_RoundedUV,
R_DrawTLColumn15_RoundedUV,
R_DrawTranslatedColumn15_RoundedUV,
R_DrawFuzzColumn15_RoundedUV,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn15_PointUV_PointZ,
R_DrawTLColumn15_PointUV_PointZ,
R_DrawTranslatedColumn15_PointUV_PointZ,
R_DrawFuzzColumn15_PointUV_PointZ,},
{R_DrawColumn15_LinearUV_PointZ,
R_DrawTLColumn15_LinearUV_PointZ,
R_DrawTranslatedColumn15_LinearUV_PointZ,
R_DrawFuzzColumn15_LinearUV_PointZ,},
{R_DrawColumn15_RoundedUV_PointZ,
R_DrawTLColumn15_RoundedUV_PointZ,
R_DrawTranslatedColumn15_RoundedUV_PointZ,
R_DrawFuzzColumn15_RoundedUV_PointZ,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn15_PointUV_LinearZ,
R_DrawTLColumn15_PointUV_LinearZ,
R_DrawTranslatedColumn15_PointUV_LinearZ,
R_DrawFuzzColumn15_PointUV_LinearZ,},
{R_DrawColumn15_LinearUV_LinearZ,
R_DrawTLColumn15_LinearUV_LinearZ,
R_DrawTranslatedColumn15_LinearUV_LinearZ,
R_DrawFuzzColumn15_LinearUV_LinearZ,},
{R_DrawColumn15_RoundedUV_LinearZ,
R_DrawTLColumn15_RoundedUV_LinearZ,
R_DrawTranslatedColumn15_RoundedUV_LinearZ,
R_DrawFuzzColumn15_RoundedUV_LinearZ,},
},
},
{
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn16_PointUV,
R_DrawTLColumn16_PointUV,
R_DrawTranslatedColumn16_PointUV,
R_DrawFuzzColumn16_PointUV,},
{R_DrawColumn16_LinearUV,
R_DrawTLColumn16_LinearUV,
R_DrawTranslatedColumn16_LinearUV,
R_DrawFuzzColumn16_LinearUV,},
{R_DrawColumn16_RoundedUV,
R_DrawTLColumn16_RoundedUV,
R_DrawTranslatedColumn16_RoundedUV,
R_DrawFuzzColumn16_RoundedUV,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn16_PointUV_PointZ,
R_DrawTLColumn16_PointUV_PointZ,
R_DrawTranslatedColumn16_PointUV_PointZ,
R_DrawFuzzColumn16_PointUV_PointZ,},
{R_DrawColumn16_LinearUV_PointZ,
R_DrawTLColumn16_LinearUV_PointZ,
R_DrawTranslatedColumn16_LinearUV_PointZ,
R_DrawFuzzColumn16_LinearUV_PointZ,},
{R_DrawColumn16_RoundedUV_PointZ,
R_DrawTLColumn16_RoundedUV_PointZ,
R_DrawTranslatedColumn16_RoundedUV_PointZ,
R_DrawFuzzColumn16_RoundedUV_PointZ,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn16_PointUV_LinearZ,
R_DrawTLColumn16_PointUV_LinearZ,
R_DrawTranslatedColumn16_PointUV_LinearZ,
R_DrawFuzzColumn16_PointUV_LinearZ,},
{R_DrawColumn16_LinearUV_LinearZ,
R_DrawTLColumn16_LinearUV_LinearZ,
R_DrawTranslatedColumn16_LinearUV_LinearZ,
R_DrawFuzzColumn16_LinearUV_LinearZ,},
{R_DrawColumn16_RoundedUV_LinearZ,
R_DrawTLColumn16_RoundedUV_LinearZ,
R_DrawTranslatedColumn16_RoundedUV_LinearZ,
R_DrawFuzzColumn16_RoundedUV_LinearZ,},
},
},
{
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn32_PointUV,
R_DrawTLColumn32_PointUV,
R_DrawTranslatedColumn32_PointUV,
R_DrawFuzzColumn32_PointUV,},
{R_DrawColumn32_LinearUV,
R_DrawTLColumn32_LinearUV,
R_DrawTranslatedColumn32_LinearUV,
R_DrawFuzzColumn32_LinearUV,},
{R_DrawColumn32_RoundedUV,
R_DrawTLColumn32_RoundedUV,
R_DrawTranslatedColumn32_RoundedUV,
R_DrawFuzzColumn32_RoundedUV,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn32_PointUV_PointZ,
R_DrawTLColumn32_PointUV_PointZ,
R_DrawTranslatedColumn32_PointUV_PointZ,
R_DrawFuzzColumn32_PointUV_PointZ,},
{R_DrawColumn32_LinearUV_PointZ,
R_DrawTLColumn32_LinearUV_PointZ,
R_DrawTranslatedColumn32_LinearUV_PointZ,
R_DrawFuzzColumn32_LinearUV_PointZ,},
{R_DrawColumn32_RoundedUV_PointZ,
R_DrawTLColumn32_RoundedUV_PointZ,
R_DrawTranslatedColumn32_RoundedUV_PointZ,
R_DrawFuzzColumn32_RoundedUV_PointZ,},
},
{
{NULL, NULL, NULL, NULL,},
{R_DrawColumn32_PointUV_LinearZ,
R_DrawTLColumn32_PointUV_LinearZ,
R_DrawTranslatedColumn32_PointUV_LinearZ,
R_DrawFuzzColumn32_PointUV_LinearZ,},
{R_DrawColumn32_LinearUV_LinearZ,
R_DrawTLColumn32_LinearUV_LinearZ,
R_DrawTranslatedColumn32_LinearUV_LinearZ,
R_DrawFuzzColumn32_LinearUV_LinearZ,},
{R_DrawColumn32_RoundedUV_LinearZ,
R_DrawTLColumn32_RoundedUV_LinearZ,
R_DrawTranslatedColumn32_RoundedUV_LinearZ,
R_DrawFuzzColumn32_RoundedUV_LinearZ,},
},
},
};
R_DrawColumn_f R_GetDrawColumnFunc(enum column_pipeline_e type,
enum draw_filter_type_e filter,
enum draw_filter_type_e filterz) {
R_DrawColumn_f result = drawcolumnfuncs[V_GetMode()][filterz][filter][type];
if (result == NULL)
I_Error("R_GetDrawColumnFunc: undefined function (%d, %d, %d)",
type, filter, filterz);
return result;
}
void R_SetDefaultDrawColumnVars(draw_column_vars_t *dcvars) {
dcvars->x = dcvars->yl = dcvars->yh = dcvars->z = 0;
dcvars->iscale = dcvars->texturemid = dcvars->texheight = dcvars->texu = 0;
dcvars->source = dcvars->prevsource = dcvars->nextsource = NULL;
dcvars->colormap = dcvars->nextcolormap = colormaps[0];
dcvars->translation = NULL;
dcvars->edgeslope = dcvars->drawingmasked = 0;
dcvars->edgetype = drawvars.sprite_edges;
}
//
// R_InitTranslationTables
// Creates the translation tables to map
// the green color ramp to gray, brown, red.
// Assumes a given structure of the PLAYPAL.
// Could be read from a lump instead.
//
byte playernumtotrans[MAXPLAYERS];
extern lighttable_t *(*c_zlight)[LIGHTLEVELS][MAXLIGHTZ];
void R_InitTranslationTables (void)
{
int i, j;
#define MAXTRANS 3
byte transtocolour[MAXTRANS];
// killough 5/2/98:
// Remove dependency of colormaps aligned on 256-byte boundary
if (translationtables == NULL) // CPhipps - allow multiple calls
translationtables = Z_Malloc(256*MAXTRANS, PU_STATIC, 0);
for (i=0; i<MAXTRANS; i++) transtocolour[i] = 255;
for (i=0; i<MAXPLAYERS; i++) {
byte wantcolour = mapcolor_plyr[i];
playernumtotrans[i] = 0;
if (wantcolour != 0x70) // Not green, would like translation
for (j=0; j<MAXTRANS; j++)
if (transtocolour[j] == 255) {
transtocolour[j] = wantcolour; playernumtotrans[i] = j+1; break;
}
}
// translate just the 16 green colors
for (i=0; i<256; i++)
if (i >= 0x70 && i<= 0x7f)
{
// CPhipps - configurable player colours
translationtables[i] = colormaps[0][((i&0xf)<<9) + transtocolour[0]];
translationtables[i+256] = colormaps[0][((i&0xf)<<9) + transtocolour[1]];
translationtables[i+512] = colormaps[0][((i&0xf)<<9) + transtocolour[2]];
}
else // Keep all other colors as is.
translationtables[i]=translationtables[i+256]=translationtables[i+512]=i;
}
//
// R_DrawSpan
// With DOOM style restrictions on view orientation,
// the floors and ceilings consist of horizontal slices
// or spans with constant z depth.
// However, rotation around the world z axis is possible,
// thus this mapping, while simpler and faster than
// perspective correct texture mapping, has to traverse
// the texture at an angle in all but a few cases.
// In consequence, flats are not stored by column (like walls),
// and the inner loop has to step in texture space u and v.
//
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_PointUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_PointUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_LinearUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_LinearUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_RoundedUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan8_RoundedUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 8
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_PointUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_PointUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_LinearUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_LinearUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_RoundedUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan15_RoundedUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 15
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_PointUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_PointUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_LinearUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_LinearUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_RoundedUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan16_RoundedUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 16
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_PointUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_PointUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_LinearUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_LinearUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_BILINEAR | RDC_DITHERZ)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_RoundedUV_PointZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED)
#include "r_drawspan.inl"
#define R_DRAWSPAN_FUNCNAME R_DrawSpan32_RoundedUV_LinearZ
#define R_DRAWSPAN_PIPELINE_BITS 32
#define R_DRAWSPAN_PIPELINE (RDC_STANDARD | RDC_ROUNDED | RDC_DITHERZ)
#include "r_drawspan.inl"
static R_DrawSpan_f drawspanfuncs[VID_MODEMAX][RDRAW_FILTER_MAXFILTERS][RDRAW_FILTER_MAXFILTERS] = {
{
{
NULL,
NULL,
NULL,
NULL,
},
{
NULL,
R_DrawSpan8_PointUV_PointZ,
R_DrawSpan8_LinearUV_PointZ,
R_DrawSpan8_RoundedUV_PointZ,
},
{
NULL,
R_DrawSpan8_PointUV_LinearZ,
R_DrawSpan8_LinearUV_LinearZ,
R_DrawSpan8_RoundedUV_LinearZ,
},
{
NULL,
NULL,
NULL,
NULL,
},
},
{
{
NULL,
NULL,
NULL,
NULL,
},
{
NULL,
R_DrawSpan15_PointUV_PointZ,
R_DrawSpan15_LinearUV_PointZ,
R_DrawSpan15_RoundedUV_PointZ,
},
{
NULL,
R_DrawSpan15_PointUV_LinearZ,
R_DrawSpan15_LinearUV_LinearZ,
R_DrawSpan15_RoundedUV_LinearZ,
},
{
NULL,
NULL,
NULL,
NULL,
},
},
{
{
NULL,
NULL,
NULL,
NULL,
},
{
NULL,
R_DrawSpan16_PointUV_PointZ,
R_DrawSpan16_LinearUV_PointZ,
R_DrawSpan16_RoundedUV_PointZ,
},
{
NULL,
R_DrawSpan16_PointUV_LinearZ,
R_DrawSpan16_LinearUV_LinearZ,
R_DrawSpan16_RoundedUV_LinearZ,
},
{
NULL,
NULL,
NULL,
NULL,
},
},
{
{
NULL,
NULL,
NULL,
NULL,
},
{
NULL,
R_DrawSpan32_PointUV_PointZ,
R_DrawSpan32_LinearUV_PointZ,
R_DrawSpan32_RoundedUV_PointZ,
},
{
NULL,
R_DrawSpan32_PointUV_LinearZ,
R_DrawSpan32_LinearUV_LinearZ,
R_DrawSpan32_RoundedUV_LinearZ,
},
{
NULL,
NULL,
NULL,
NULL,
},
},
};
R_DrawSpan_f R_GetDrawSpanFunc(enum draw_filter_type_e filter,
enum draw_filter_type_e filterz) {
R_DrawSpan_f result = drawspanfuncs[V_GetMode()][filterz][filter];
if (result == NULL)
I_Error("R_GetDrawSpanFunc: undefined function (%d, %d)",
filter, filterz);
return result;
}
void R_DrawSpan(draw_span_vars_t *dsvars) {
R_GetDrawSpanFunc(drawvars.filterfloor, drawvars.filterz)(dsvars);
}
//
// R_InitBuffer
// Creats lookup tables that avoid
// multiplies and other hazzles
// for getting the framebuffer address
// of a pixel to draw.
//
void R_InitBuffer(int width, int height)
{
int i=0;
// Handle resize,
// e.g. smaller view windows
// with border and/or status bar.
viewwindowx = (SCREENWIDTH-width) >> 1;
// Same with base row offset.
viewwindowy = width==SCREENWIDTH ? 0 : (SCREENHEIGHT-(ST_SCALED_HEIGHT-1)-height)>>1;
drawvars.byte_topleft = screens[0].data + viewwindowy*screens[0].byte_pitch + viewwindowx;
drawvars.short_topleft = (unsigned short *)(screens[0].data) + viewwindowy*screens[0].short_pitch + viewwindowx;
drawvars.int_topleft = (unsigned int *)(screens[0].data) + viewwindowy*screens[0].int_pitch + viewwindowx;
drawvars.byte_pitch = screens[0].byte_pitch;
drawvars.short_pitch = screens[0].short_pitch;
drawvars.int_pitch = screens[0].int_pitch;
if (V_GetMode() == VID_MODE8) {
for (i=0; i<FUZZTABLE; i++)
fuzzoffset[i] = fuzzoffset_org[i]*screens[0].byte_pitch;
} else if ((V_GetMode() == VID_MODE15) || (V_GetMode() == VID_MODE16)) {
for (i=0; i<FUZZTABLE; i++)
fuzzoffset[i] = fuzzoffset_org[i]*screens[0].short_pitch;
} else if (V_GetMode() == VID_MODE32) {
for (i=0; i<FUZZTABLE; i++)
fuzzoffset[i] = fuzzoffset_org[i]*screens[0].int_pitch;
}
}
//
// R_FillBackScreen
// Fills the back screen with a pattern
// for variable screen sizes
// Also draws a beveled edge.
//
// CPhipps - patch drawing updated
void R_FillBackScreen (void)
{
int x,y;
if (scaledviewwidth == SCREENWIDTH)
return;
V_DrawBackground(gamemode == commercial ? "GRNROCK" : "FLOOR7_2", 1);
for (x=0; x<scaledviewwidth; x+=8)
V_DrawNamePatch(viewwindowx+x,viewwindowy-8,1,"brdr_t", CR_DEFAULT, VPT_NONE);
for (x=0; x<scaledviewwidth; x+=8)
V_DrawNamePatch(viewwindowx+x,viewwindowy+viewheight,1,"brdr_b", CR_DEFAULT, VPT_NONE);
for (y=0; y<viewheight; y+=8)
V_DrawNamePatch(viewwindowx-8,viewwindowy+y,1,"brdr_l", CR_DEFAULT, VPT_NONE);
for (y=0; y<viewheight; y+=8)
V_DrawNamePatch(viewwindowx+scaledviewwidth,viewwindowy+y,1,"brdr_r", CR_DEFAULT, VPT_NONE);
// Draw beveled edge.
V_DrawNamePatch(viewwindowx-8,viewwindowy-8,1,"brdr_tl", CR_DEFAULT, VPT_NONE);
V_DrawNamePatch(viewwindowx+scaledviewwidth,viewwindowy-8,1,"brdr_tr", CR_DEFAULT, VPT_NONE);
V_DrawNamePatch(viewwindowx-8,viewwindowy+viewheight,1,"brdr_bl", CR_DEFAULT, VPT_NONE);
V_DrawNamePatch(viewwindowx+scaledviewwidth,viewwindowy+viewheight,1,"brdr_br", CR_DEFAULT, VPT_NONE);
}
//
// Copy a screen buffer.
//
void R_VideoErase(int x, int y, int count)
{
if (V_GetMode() != VID_MODEGL)
memcpy(screens[0].data+y*screens[0].byte_pitch+x*V_GetPixelDepth(),
screens[1].data+y*screens[1].byte_pitch+x*V_GetPixelDepth(),
count*V_GetPixelDepth()); // LFB copy.
}
//
// R_DrawViewBorder
// Draws the border around the view
// for different size windows?
//
void R_DrawViewBorder(void)
{
int top, side, i;
if (V_GetMode() == VID_MODEGL) {
// proff 11/99: we don't have a backscreen in OpenGL from where we can copy this
R_FillBackScreen();
return;
}
if ((SCREENHEIGHT != viewheight) ||
((automapmode & am_active) && ! (automapmode & am_overlay)))
{
// erase left and right of statusbar
side= ( SCREENWIDTH - ST_SCALED_WIDTH ) / 2;
if (side > 0) {
for (i = (SCREENHEIGHT - ST_SCALED_HEIGHT); i < SCREENHEIGHT; i++)
{
R_VideoErase (0, i, side);
R_VideoErase (ST_SCALED_WIDTH+side, i, side);
}
}
}
if ( viewheight >= ( SCREENHEIGHT - ST_SCALED_HEIGHT ))
return; // if high-res, don<6F>t go any further!
top = ((SCREENHEIGHT-ST_SCALED_HEIGHT)-viewheight)/2;
side = (SCREENWIDTH-scaledviewwidth)/2;
// copy top
for (i = 0; i < top; i++)
R_VideoErase (0, i, SCREENWIDTH);
// copy sides
for (i = top; i < (top+viewheight); i++) {
R_VideoErase (0, i, side);
R_VideoErase (viewwidth+side, i, side);
}
// copy bottom
for (i = top+viewheight; i < (SCREENHEIGHT - ST_SCALED_HEIGHT); i++)
R_VideoErase (0, i, SCREENWIDTH);
}
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