mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-12-12 05:31:59 +00:00
271 lines
6.3 KiB
C
271 lines
6.3 KiB
C
/*
|
|
vid_common_sw32.c
|
|
|
|
general video driver functions
|
|
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
static __attribute__ ((used)) const char rcsid[] =
|
|
"$Id$";
|
|
|
|
#include "QF/cvar.h"
|
|
#include "QF/qargs.h"
|
|
#include "QF/sys.h"
|
|
#include "QF/va.h"
|
|
#include "QF/vid.h"
|
|
|
|
#include "compat.h"
|
|
|
|
|
|
|
|
VISIBLE unsigned short d_8to16table[256];
|
|
unsigned char d_15to8table[65536];
|
|
|
|
|
|
/*
|
|
lhfindcolor
|
|
|
|
LordHavoc: finds nearest matching color in a palette
|
|
*/
|
|
static int
|
|
lhfindcolor (byte *pal, int colors, int r, int g, int b)
|
|
{
|
|
int i, dist, best, bestdist, rd, gd, bd;
|
|
best = 0;
|
|
bestdist = 1000000000;
|
|
for (i = 0;i < colors;i++)
|
|
{
|
|
rd = pal[i*3+0] - r;
|
|
gd = pal[i*3+1] - g;
|
|
bd = pal[i*3+2] - b;
|
|
dist = rd*rd+gd*gd+bd*bd;
|
|
if (dist < bestdist)
|
|
{
|
|
if (!dist) // exact match
|
|
return i;
|
|
best = i;
|
|
bestdist = dist;
|
|
}
|
|
}
|
|
return best;
|
|
}
|
|
|
|
/*
|
|
VID_MakeColormap32
|
|
|
|
LordHavoc: makes a 32bit color*light table, RGBA order, no endian,
|
|
may need to be re-ordered to hardware at display time
|
|
*/
|
|
static void
|
|
VID_MakeColormap32 (void *outcolormap, byte *pal)
|
|
{
|
|
int c, l;
|
|
byte *out;
|
|
out = (byte *)&d_8to24table;
|
|
for (c = 0; c < 256; c++) {
|
|
*out++ = pal[c*3+0];
|
|
*out++ = pal[c*3+1];
|
|
*out++ = pal[c*3+2];
|
|
*out++ = 255;
|
|
}
|
|
d_8to24table[255] = 0; // 255 is transparent
|
|
out = (byte *) outcolormap;
|
|
for (l = 0;l < VID_GRADES;l++)
|
|
{
|
|
for (c = 0;c < vid.fullbright;c++)
|
|
{
|
|
out[(l*256+c)*4+0] = bound(0, (pal[c*3+0] * l) >> (VID_CBITS - 1),
|
|
255);
|
|
out[(l*256+c)*4+1] = bound(0, (pal[c*3+1] * l) >> (VID_CBITS - 1),
|
|
255);
|
|
out[(l*256+c)*4+2] = bound(0, (pal[c*3+2] * l) >> (VID_CBITS - 1),
|
|
255);
|
|
out[(l*256+c)*4+3] = 255;
|
|
}
|
|
for (;c < 255;c++)
|
|
{
|
|
out[(l*256+c)*4+0] = pal[c*3+0];
|
|
out[(l*256+c)*4+1] = pal[c*3+1];
|
|
out[(l*256+c)*4+2] = pal[c*3+2];
|
|
out[(l*256+c)*4+3] = 255;
|
|
}
|
|
out[(l*256+255)*4+0] = 0;
|
|
out[(l*256+255)*4+1] = 0;
|
|
out[(l*256+255)*4+2] = 0;
|
|
out[(l*256+255)*4+3] = 0;
|
|
}
|
|
}
|
|
|
|
static unsigned short
|
|
lh24to16bit (int red, int green, int blue)
|
|
{
|
|
red = bound(0, red, 255);
|
|
green = bound(0, green, 255);
|
|
blue = bound(0, blue, 255);
|
|
red >>= 3;
|
|
green >>= 2;
|
|
blue >>= 3;
|
|
red <<= 11;
|
|
green <<= 5;
|
|
return (unsigned short) (red | green | blue);
|
|
}
|
|
|
|
/*
|
|
VID_MakeColormap16
|
|
|
|
LordHavoc: makes a 16bit color*light table, RGB order, native endian,
|
|
may need to be translated to hardware order at display time
|
|
*/
|
|
static void
|
|
VID_MakeColormap16 (void *outcolormap, byte *pal)
|
|
{
|
|
int c, l;
|
|
unsigned short *out;
|
|
out = (unsigned short *)&d_8to16table;
|
|
for (c = 0; c < 256; c++)
|
|
*out++ = lh24to16bit(pal[c*3+0], pal[c*3+1], pal[c*3+2]);
|
|
d_8to16table[255] = 0; // 255 is transparent
|
|
out = (unsigned short *) outcolormap;
|
|
for (l = 0;l < VID_GRADES;l++)
|
|
{
|
|
for (c = 0;c < vid.fullbright;c++)
|
|
out[l*256+c] = lh24to16bit(
|
|
(pal[c*3+0] * l) >> (VID_CBITS - 1),
|
|
(pal[c*3+1] * l) >> (VID_CBITS - 1),
|
|
(pal[c*3+2] * l) >> (VID_CBITS - 1));
|
|
for (;c < 255;c++)
|
|
out[l*256+c] = lh24to16bit(pal[c*3+0], pal[c*3+1], pal[c*3+2]);
|
|
out[l*256+255] = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
VID_MakeColormap8
|
|
|
|
LordHavoc: makes a 8bit color*light table
|
|
*/
|
|
static void
|
|
VID_MakeColormap8 (void *outcolormap, byte *pal)
|
|
{
|
|
int c, l;
|
|
byte *out;
|
|
out = (byte *) outcolormap;
|
|
for (l = 0;l < VID_GRADES;l++)
|
|
{
|
|
for (c = 0;c < vid.fullbright;c++)
|
|
out[l*256+c] = lhfindcolor(pal, 256,
|
|
(pal[c*3+0] * l) >> (VID_CBITS - 1),
|
|
(pal[c*3+1] * l) >> (VID_CBITS - 1),
|
|
(pal[c*3+2] * l) >> (VID_CBITS - 1));
|
|
for (;c < 256;c++)
|
|
out[l*256+c] = c;
|
|
}
|
|
}
|
|
|
|
/*
|
|
VID_MakeColormaps
|
|
|
|
LordHavoc: makes 8bit, 16bit, and 32bit colormaps and palettes
|
|
*/
|
|
void
|
|
VID_MakeColormaps (int fullbrights, byte *pal)
|
|
{
|
|
vid.fullbright = fullbrights;
|
|
vid.colormap8 = malloc (256*VID_GRADES * sizeof (byte));
|
|
vid.colormap16 = malloc (256*VID_GRADES * sizeof (short));
|
|
vid.colormap32 = malloc (256*VID_GRADES * sizeof (int));
|
|
SYS_CHECKMEM (vid.colormap8 && vid.colormap16 && vid.colormap32);
|
|
VID_MakeColormap8(vid.colormap8, pal);
|
|
VID_MakeColormap16(vid.colormap16, pal);
|
|
VID_MakeColormap32(vid.colormap32, pal);
|
|
}
|
|
|
|
VISIBLE void
|
|
VID_InitBuffers (void)
|
|
{
|
|
int buffersize, zbuffersize, cachesize = 1;
|
|
|
|
// No console scaling in the sw renderer
|
|
vid.conwidth = vid.width;
|
|
vid.conheight = vid.height;
|
|
|
|
// Calculate the sizes we want first
|
|
buffersize = vid.rowbytes * vid.height;
|
|
zbuffersize = vid.width * vid.height * sizeof (*vid.zbuffer);
|
|
if (vid.surf_cache_size)
|
|
cachesize = vid.surf_cache_size (vid.width, vid.height);
|
|
|
|
// Free the old z-buffer
|
|
if (vid.zbuffer) {
|
|
free (vid.zbuffer);
|
|
vid.zbuffer = NULL;
|
|
}
|
|
// Free the old surface cache
|
|
if (vid.surfcache) {
|
|
if (vid.flush_caches)
|
|
vid.flush_caches ();
|
|
free (vid.surfcache);
|
|
vid.surfcache = NULL;
|
|
}
|
|
if (vid.do_screen_buffer) {
|
|
vid.do_screen_buffer ();
|
|
} else {
|
|
// Free the old screen buffer
|
|
if (vid.buffer) {
|
|
free (vid.buffer);
|
|
vid.conbuffer = vid.buffer = NULL;
|
|
}
|
|
// Allocate the new screen buffer
|
|
vid.conbuffer = vid.buffer = calloc (buffersize, 1);
|
|
if (!vid.conbuffer) {
|
|
Sys_Error ("Not enough memory for video mode");
|
|
}
|
|
}
|
|
// Allocate the new z-buffer
|
|
vid.zbuffer = calloc (zbuffersize, 1);
|
|
if (!vid.zbuffer) {
|
|
free (vid.buffer);
|
|
vid.conbuffer = vid.buffer = NULL;
|
|
Sys_Error ("Not enough memory for video mode");
|
|
}
|
|
// Allocate the new surface cache; free the z-buffer if we fail
|
|
vid.surfcache = calloc (cachesize, 1);
|
|
if (!vid.surfcache) {
|
|
free (vid.buffer);
|
|
free (vid.zbuffer);
|
|
vid.zbuffer = NULL;
|
|
Sys_Error ("Not enough memory for video mode");
|
|
}
|
|
|
|
if (vid.init_caches)
|
|
vid.init_caches (vid.surfcache, cachesize);
|
|
}
|
|
|
|
VISIBLE void
|
|
VID_ShiftPalette (unsigned char *p)
|
|
{
|
|
VID_SetPalette (p);
|
|
}
|