quakeforge/libs/video/renderer/sw/vid_common_sw.c

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/*
vid_common_sw.c
Common software video driver functions
Copyright (C) 2001 Jeff Teunissen <deek@quakeforge.net>
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 <stdlib.h>
#include <math.h>
#include "QF/console.h"
#include "QF/mathlib.h"
#include "QF/sys.h"
#include "QF/vid.h"
#include "vid_internal.h"
void
VID_InitBuffers (void)
{
int buffersize, zbuffersize, cachesize = 1;
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// No console scaling in the sw renderer
viddef.conwidth = viddef.width;
viddef.conheight = viddef.height;
Con_CheckResize ();
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// Calculate the sizes we want first
buffersize = viddef.rowbytes * viddef.height;
zbuffersize = viddef.width * viddef.height * sizeof (*viddef.zbuffer);
if (viddef.surf_cache_size)
cachesize = viddef.surf_cache_size (viddef.width, viddef.height);
// Free the old z-buffer
if (viddef.zbuffer) {
free (viddef.zbuffer);
viddef.zbuffer = NULL;
}
// Free the old surface cache
if (viddef.surfcache) {
if (viddef.flush_caches)
viddef.flush_caches ();
free (viddef.surfcache);
viddef.surfcache = NULL;
}
if (viddef.do_screen_buffer) {
viddef.do_screen_buffer ();
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} else {
// Free the old screen buffer
if (viddef.buffer) {
free (viddef.buffer);
viddef.conbuffer = viddef.buffer = NULL;
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}
// Allocate the new screen buffer
viddef.conbuffer = viddef.buffer = calloc (buffersize, 1);
if (!viddef.conbuffer) {
Sys_Error ("Not enough memory for video mode");
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}
}
// Allocate the new z-buffer
viddef.zbuffer = calloc (zbuffersize, 1);
if (!viddef.zbuffer) {
free (viddef.buffer);
viddef.conbuffer = viddef.buffer = NULL;
Sys_Error ("Not enough memory for video mode");
}
// Allocate the new surface cache; free the z-buffer if we fail
viddef.surfcache = calloc (cachesize, 1);
if (!viddef.surfcache) {
free (viddef.buffer);
free (viddef.zbuffer);
viddef.conbuffer = viddef.buffer = NULL;
viddef.zbuffer = NULL;
Sys_Error ("Not enough memory for video mode");
}
if (viddef.init_caches)
viddef.init_caches (viddef.surfcache, cachesize);
}
void
VID_ShiftPalette (unsigned char *p)
{
VID_SetPalette (p);
}