ref: 5781718e4d025711c24f6db2eaea14de2d17fec9
dir: /r_draw.c/
// R_draw.c
#include "h2stdinc.h"
#ifndef RENDER3D
#include "doomdef.h"
#include "r_local.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.
*/
int viewwidth, scaledviewwidth, viewheight, viewwindowx, viewwindowy;
byte *ylookup[MAXHEIGHT];
int columnofs[MAXWIDTH];
byte *tinttable; // used for translucent sprites
/*
==================
=
= R_DrawColumn
=
= Source is the top of the column to scale
=
==================
*/
lighttable_t *dc_colormap;
int dc_x;
int dc_yl;
int dc_yh;
fixed_t dc_iscale;
fixed_t dc_texturemid;
byte *dc_source; // first pixel in a column (possibly virtual)
//int dccount; // just for profiling
void R_DrawColumn (void)
{
int count;
byte *dest;
fixed_t frac, fracstep;
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery)*fracstep;
do
{
*dest = dc_colormap[dc_source[(frac>>FRACBITS) & 127]];
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
}
void R_DrawColumnLow (void)
{
int count;
byte *dest;
fixed_t frac, fracstep;
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
// dccount++;
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery)*fracstep;
do
{
*dest = dc_colormap[dc_source[(frac>>FRACBITS) & 127]];
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
}
/*
#define FUZZTABLE 50
#define FUZZOFF (SCREENWIDTH)
static int fuzzoffset[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 fuzzpos = 0;
*/
void R_DrawFuzzColumn (void)
{
int count;
byte *dest;
fixed_t frac, fracstep;
if (!dc_yl)
dc_yl = 1;
if (dc_yh == viewheight - 1)
dc_yh = viewheight - 2;
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
I_Error ("R_DrawFuzzColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery)*fracstep;
// OLD FUZZY INVISO SPRITE STUFF
/*
do
{
*dest = colormaps[6*256 + dest[fuzzoffset[fuzzpos]]];
if (++fuzzpos == FUZZTABLE)
fuzzpos = 0;
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
*/
do
{
*dest = tinttable[((*dest)<<8) + dc_colormap[dc_source[(frac>>FRACBITS) & 127]]];
// *dest = dest[SCREENWIDTH*10+5];
// *dest = //tinttable[((*dest)<<8) + colormaps[dc_source[(frac>>FRACBITS) & 127]]];
// *dest = dc_colormap[dc_source[(frac>>FRACBITS)&127]];
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
}
/*
========================
=
= R_DrawTranslatedColumn
=
========================
*/
byte *dc_translation;
byte *translationtables;
void R_DrawTranslatedColumn (void)
{
int count;
byte *dest;
fixed_t frac, fracstep;
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery)*fracstep;
do
{
*dest = dc_colormap[dc_translation[dc_source[frac>>FRACBITS]]];
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
}
void R_DrawTranslatedFuzzColumn (void)
{
int count;
byte *dest;
fixed_t frac, fracstep;
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned)dc_x >= SCREENWIDTH || dc_yl < 0 || dc_yh >= SCREENHEIGHT)
I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x);
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery)*fracstep;
do
{
*dest = tinttable[((*dest)<<8) + dc_colormap[dc_translation[dc_source[frac>>FRACBITS]]]];
dest += SCREENWIDTH;
frac += fracstep;
} while (count--);
}
//--------------------------------------------------------------------------
//
// PROC R_InitTranslationTables
//
//--------------------------------------------------------------------------
void R_InitTranslationTables (void)
{
int i;
// Load tint table
tinttable = (byte *) W_CacheLumpName("TINTTAB", PU_STATIC);
// Allocate translation tables
translationtables = (byte *) Z_Malloc(256*3 + 255, PU_STATIC, NULL);
translationtables = (byte *)(((intptr_t)translationtables + 255) & ~255);
// Fill out the translation tables
for (i = 0; i < 256; i++)
{
if (i >= 225 && i <= 240)
{
translationtables[i] = 114 + (i - 225); // yellow
translationtables[i + 256] = 145 + (i - 225); // red
translationtables[i + 512] = 190 + (i - 225); // blue
}
else
{
translationtables[i] =
translationtables[i + 256] =
translationtables[i + 512] = i;
}
}
}
/*
================
=
= R_DrawSpan
=
================
*/
int ds_y;
int ds_x1;
int ds_x2;
lighttable_t *ds_colormap;
fixed_t ds_xfrac;
fixed_t ds_yfrac;
fixed_t ds_xstep;
fixed_t ds_ystep;
byte *ds_source; // start of a 64*64 tile image
//int dscount; // just for profiling
void R_DrawSpan (void)
{
fixed_t xfrac, yfrac;
byte *dest;
int count, spot;
#ifdef RANGECHECK
if (ds_x2 < ds_x1 || ds_x1 < 0 || ds_x2 >= SCREENWIDTH || (unsigned)ds_y > SCREENHEIGHT)
I_Error ("R_DrawSpan: %i to %i at %i", ds_x1, ds_x2, ds_y);
// dscount++;
#endif
xfrac = ds_xfrac;
yfrac = ds_yfrac;
dest = ylookup[ds_y] + columnofs[ds_x1];
count = ds_x2 - ds_x1;
do
{
spot = ((yfrac>>(16-6)) & (63*64)) + ((xfrac>>16) & 63);
*dest++ = ds_colormap[ds_source[spot]];
xfrac += ds_xstep;
yfrac += ds_ystep;
} while (count--);
}
void R_DrawSpanLow (void)
{
fixed_t xfrac, yfrac;
byte *dest;
int count, spot;
#ifdef RANGECHECK
if (ds_x2 < ds_x1 || ds_x1 < 0 || ds_x2 >= SCREENWIDTH || (unsigned)ds_y > SCREENHEIGHT)
I_Error ("R_DrawSpan: %i to %i at %i", ds_x1, ds_x2, ds_y);
// dscount++;
#endif
xfrac = ds_xfrac;
yfrac = ds_yfrac;
dest = ylookup[ds_y] + columnofs[ds_x1];
count = ds_x2 - ds_x1;
do
{
spot = ((yfrac>>(16-6)) & (63*64)) + ((xfrac>>16) & 63);
*dest++ = ds_colormap[ds_source[spot]];
xfrac += ds_xstep;
yfrac += ds_ystep;
} while (count--);
}
/*
================
=
= R_InitBuffer
=
=================
*/
void R_InitBuffer (int width, int height)
{
int i;
viewwindowx = (SCREENWIDTH - width) >> 1;
for (i = 0; i < width; i++)
columnofs[i] = viewwindowx + i;
if (width == SCREENWIDTH)
viewwindowy = 0;
else
viewwindowy = (SCREENHEIGHT - SBARHEIGHT - height) >> 1;
for (i = 0; i < height; i++)
ylookup[i] = screens + (i + viewwindowy)*SCREENWIDTH;
}
/*
==================
=
= R_DrawViewBorder
=
= Draws the border around the view for different size windows
==================
*/
boolean BorderNeedRefresh;
void R_DrawViewBorder (void)
{
byte *src, *dest;
int x, y;
if (scaledviewwidth == SCREENWIDTH)
return;
if (shareware)
{
src = (byte *) W_CacheLumpName ("FLOOR04", PU_CACHE);
}
else
{
src = (byte *) W_CacheLumpName ("FLAT513", PU_CACHE);
}
dest = screens;
for (y = 0 ; y < SCREENHEIGHT - SBARHEIGHT; y++)
{
for (x = 0; x < SCREENWIDTH/64; x++)
{
memcpy (dest, src + ((y & 63)<<6), 64);
dest += 64;
}
if (SCREENWIDTH & 63)
{
memcpy (dest, src + ((y & 63)<<6), SCREENWIDTH & 63);
dest += (SCREENWIDTH & 63);
}
}
for (x = viewwindowx; x < viewwindowx + viewwidth; x += 16)
{
V_DrawPatch(x, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordt", PU_CACHE));
V_DrawPatch(x, viewwindowy + viewheight, (patch_t *)W_CacheLumpName("bordb", PU_CACHE));
}
for (y = viewwindowy; y < viewwindowy + viewheight; y += 16)
{
V_DrawPatch(viewwindowx - 4, y, (patch_t *)W_CacheLumpName("bordl", PU_CACHE));
V_DrawPatch(viewwindowx+viewwidth, y, (patch_t *)W_CacheLumpName("bordr", PU_CACHE));
}
V_DrawPatch(viewwindowx - 4, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordtl", PU_CACHE));
V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordtr", PU_CACHE));
V_DrawPatch(viewwindowx + viewwidth, viewwindowy + viewheight, (patch_t *)W_CacheLumpName("bordbr", PU_CACHE));
V_DrawPatch(viewwindowx - 4, viewwindowy + viewheight, (patch_t *)W_CacheLumpName("bordbl", PU_CACHE));
}
/*
==================
=
= R_DrawTopBorder
=
= Draws the top border around the view for different size windows
==================
*/
boolean BorderTopRefresh;
void R_DrawTopBorder (void)
{
byte *src, *dest;
int x, y;
if (scaledviewwidth == SCREENWIDTH)
return;
if (shareware)
{
src = (byte *) W_CacheLumpName ("FLOOR04", PU_CACHE);
}
else
{
src = (byte *) W_CacheLumpName ("FLAT513", PU_CACHE);
}
dest = screens;
for (y = 0; y < 30; y++)
{
for (x = 0; x < SCREENWIDTH/64; x++)
{
memcpy (dest, src + ((y & 63)<<6), 64);
dest += 64;
}
if (SCREENWIDTH & 63)
{
memcpy (dest, src + ((y & 63)<<6), SCREENWIDTH & 63);
dest += (SCREENWIDTH & 63);
}
}
if (viewwindowy < 25)
{
for (x = viewwindowx; x < viewwindowx + viewwidth; x += 16)
{
V_DrawPatch(x, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordt", PU_CACHE));
}
V_DrawPatch(viewwindowx-4, viewwindowy, (patch_t *)W_CacheLumpName("bordl", PU_CACHE));
V_DrawPatch(viewwindowx + viewwidth, viewwindowy, (patch_t *)W_CacheLumpName("bordr", PU_CACHE));
V_DrawPatch(viewwindowx - 4, viewwindowy + 16, (patch_t *)W_CacheLumpName("bordl", PU_CACHE));
V_DrawPatch(viewwindowx + viewwidth, viewwindowy + 16, (patch_t *)W_CacheLumpName("bordr", PU_CACHE));
V_DrawPatch(viewwindowx - 4, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordtl", PU_CACHE));
V_DrawPatch(viewwindowx + viewwidth, viewwindowy - 4, (patch_t *)W_CacheLumpName("bordtr", PU_CACHE));
}
}
#endif /* RENDER3D */