mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 15:22:04 +00:00
this is just causing confusion. if we ever need it, it's still in cvs
This commit is contained in:
Bill Currie
parent
ee9ed0c395
commit
0f2f58754b
1 changed files with 0 additions and 455 deletions
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@ -1,455 +0,0 @@
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/*
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vid_vga.c
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@description@
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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static const char rcsid[] =
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"$Id$";
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <dos.h>
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#include "d_local.h"
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#include "dosisms.h"
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#include "vid_dos.h"
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#include <dpmi.h>
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int VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes;
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byte *VGA_pagebase;
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vmode_t *VGA_pcurmode;
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static int VGA_planar;
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static int VGA_numpages;
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static int VGA_buffersize;
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void *vid_surfcache;
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int vid_surfcachesize;
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int VGA_highhunkmark;
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#include "vgamodes.h"
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#define NUMVIDMODES (sizeof(vgavidmodes) / sizeof(vgavidmodes[0]))
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void VGA_UpdatePlanarScreen (void *srcbuffer);
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static byte backingbuf[48 * 24];
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/*
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================
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VGA_BeginDirectRect
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================
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*/
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void
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VGA_BeginDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode, int x,
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int y, byte * pbitmap, int width, int height)
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{
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int i, j, k, plane, reps, repshift;
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if (!lvid->direct)
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return;
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if (lvid->aspect > 1.5) {
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reps = 2;
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repshift = 1;
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} else {
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reps = 1;
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repshift = 0;
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}
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if (pcurrentmode->planar) {
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for (plane = 0; plane < 4; plane++) {
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// select the correct plane for reading and writing
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outportb (SC_INDEX, MAP_MASK);
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outportb (SC_DATA, 1 << plane);
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outportb (GC_INDEX, READ_MAP);
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outportb (GC_DATA, plane);
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for (i = 0; i < (height << repshift); i += reps) {
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for (k = 0; k < reps; k++) {
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for (j = 0; j < (width >> 2); j++) {
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backingbuf[(i + k) * 24 + (j << 2) + plane] =
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lvid->direct[(y + i + k) * VGA_rowbytes +
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(x >> 2) + j];
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lvid->direct[(y + i + k) * VGA_rowbytes + (x >> 2) +
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j] =
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pbitmap[(i >> repshift) * 24 + (j << 2) + plane];
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}
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}
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}
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}
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} else {
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for (i = 0; i < (height << repshift); i += reps) {
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for (j = 0; j < reps; j++) {
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memcpy (&backingbuf[(i + j) * 24],
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lvid->direct + x + ((y << repshift) + i + j) *
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VGA_rowbytes, width);
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memcpy (lvid->direct + x + ((y << repshift) + i + j) *
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VGA_rowbytes, &pbitmap[(i >> repshift) * width], width);
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}
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}
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}
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}
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/*
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================
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VGA_EndDirectRect
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================
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*/
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void
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VGA_EndDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode, int x,
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int y, int width, int height)
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{
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int i, j, k, plane, reps, repshift;
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if (!lvid->direct)
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return;
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if (lvid->aspect > 1.5) {
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reps = 2;
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repshift = 1;
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} else {
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reps = 1;
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repshift = 0;
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}
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if (pcurrentmode->planar) {
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for (plane = 0; plane < 4; plane++) {
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// select the correct plane for writing
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outportb (SC_INDEX, MAP_MASK);
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outportb (SC_DATA, 1 << plane);
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for (i = 0; i < (height << repshift); i += reps) {
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for (k = 0; k < reps; k++) {
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for (j = 0; j < (width >> 2); j++) {
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lvid->direct[(y + i + k) * VGA_rowbytes + (x >> 2) +
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j] =
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backingbuf[(i + k) * 24 + (j << 2) + plane];
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}
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}
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}
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}
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} else {
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for (i = 0; i < (height << repshift); i += reps) {
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for (j = 0; j < reps; j++) {
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memcpy (lvid->direct + x + ((y << repshift) + i + j) *
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VGA_rowbytes, &backingbuf[(i + j) * 24], width);
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}
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}
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}
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}
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/*
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================
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VGA_Init
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================
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*/
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void
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VGA_Init (void)
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{
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int i;
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// link together all the VGA modes
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for (i = 0; i < (NUMVIDMODES - 1); i++) {
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vgavidmodes[i].pnext = &vgavidmodes[i + 1];
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}
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// add the VGA modes at the start of the mode list
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vgavidmodes[NUMVIDMODES - 1].pnext = pvidmodes;
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pvidmodes = &vgavidmodes[0];
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numvidmodes += NUMVIDMODES;
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}
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/*
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================
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VGA_WaitVsync
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================
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*/
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void
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VGA_WaitVsync (void)
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{
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while ((inportb (0x3DA) & 0x08) == 0);
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}
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/*
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================
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VGA_ClearVideoMem
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================
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*/
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void
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VGA_ClearVideoMem (int planar)
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{
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if (planar) {
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// enable all planes for writing
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outportb (SC_INDEX, MAP_MASK);
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outportb (SC_DATA, 0x0F);
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}
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Q_memset (VGA_pagebase, 0, VGA_rowbytes * VGA_height);
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}
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/*
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================
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VGA_FreeAndAllocVidbuffer
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================
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*/
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qboolean
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VGA_FreeAndAllocVidbuffer (viddef_t *lvid, int allocnewbuffer)
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{
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int tsize, tbuffersize;
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if (allocnewbuffer) {
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// alloc an extra line in case we want to wrap, and allocate the
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// z-buffer
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tbuffersize = (lvid->rowbytes * (lvid->height + 1)) +
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(lvid->width * lvid->height * sizeof (*d_pzbuffer));
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} else {
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// just allocate the z-buffer
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tbuffersize = lvid->width * lvid->height * sizeof (*d_pzbuffer);
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}
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tsize = D_SurfaceCacheForRes (lvid->width, lvid->height);
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tbuffersize += tsize;
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// see if there's enough memory, allowing for the normal mode 0x13 pixel,
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// z, and surface buffers
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if ((host_parms.memsize - tbuffersize + SURFCACHE_SIZE_AT_320X200 +
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0x10000 * 3) < minimum_memory) {
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Con_Printf ("Not enough memory for video mode\n");
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VGA_pcurmode = NULL; // so no further accesses to the
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// buffer are
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// attempted, particularly when clearing
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return false; // not enough memory for mode
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}
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VGA_buffersize = tbuffersize;
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vid_surfcachesize = tsize;
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if (d_pzbuffer) {
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D_FlushCaches ();
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Hunk_FreeToHighMark (VGA_highhunkmark);
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d_pzbuffer = NULL;
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}
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VGA_highhunkmark = Hunk_HighMark ();
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d_pzbuffer = Hunk_HighAllocName (VGA_buffersize, "video");
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vid_surfcache = (byte *) d_pzbuffer
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+ lvid->width * lvid->height * sizeof (*d_pzbuffer);
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if (allocnewbuffer) {
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lvid->buffer = (void *) ((byte *) vid_surfcache + vid_surfcachesize);
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lvid->conbuffer = lvid->buffer;
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}
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return true;
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}
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/*
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================
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VGA_CheckAdequateMem
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================
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*/
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qboolean
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VGA_CheckAdequateMem (int width, int height, int rowbytes, int allocnewbuffer)
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{
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int tbuffersize;
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tbuffersize = width * height * sizeof (*d_pzbuffer);
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if (allocnewbuffer) {
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// alloc an extra line in case we want to wrap, and allocate the
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// z-buffer
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tbuffersize += (rowbytes * (height + 1));
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}
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tbuffersize += D_SurfaceCacheForRes (width, height);
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// see if there's enough memory, allowing for the normal mode 0x13 pixel,
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// z, and surface buffers
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if ((host_parms.memsize - tbuffersize + SURFCACHE_SIZE_AT_320X200 +
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0x10000 * 3) < minimum_memory) {
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return false; // not enough memory for mode
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}
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return true;
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}
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/*
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================
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VGA_InitMode
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================
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*/
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int
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VGA_InitMode (viddef_t *lvid, vmode_t * pcurrentmode)
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{
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vextra_t *pextra;
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pextra = pcurrentmode->pextradata;
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if (!VGA_FreeAndAllocVidbuffer (lvid, pextra->vidbuffer))
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return -1; // memory alloc failed
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if (VGA_pcurmode)
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VGA_ClearVideoMem (VGA_pcurmode->planar);
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// mode 0x13 is the base for all the Mode X-class mode sets
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regs.h.ah = 0;
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regs.h.al = 0x13;
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dos_int86 (0x10);
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VGA_pagebase = (void *) real2ptr (0xa0000);
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lvid->direct = (byte *) VGA_pagebase;
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// set additional registers as needed
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VideoRegisterSet (pextra->pregset);
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VGA_numpages = 1;
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lvid->numpages = VGA_numpages;
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VGA_width = (lvid->width + 0x1F) & ~0x1F;
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VGA_height = lvid->height;
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VGA_planar = pcurrentmode->planar;
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if (VGA_planar)
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VGA_rowbytes = lvid->rowbytes / 4;
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else
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VGA_rowbytes = lvid->rowbytes;
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VGA_bufferrowbytes = lvid->rowbytes;
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lvid->colormap = vid_colormap;
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lvid->fullbright = 256 - LittleLong (*((int *) lvid->colormap + 2048));
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lvid->maxwarpwidth = WARP_WIDTH;
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lvid->maxwarpheight = WARP_HEIGHT;
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lvid->conbuffer = lvid->buffer;
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lvid->conrowbytes = lvid->rowbytes;
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lvid->conwidth = lvid->width;
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lvid->conheight = lvid->height;
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VGA_pcurmode = pcurrentmode;
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VGA_ClearVideoMem (pcurrentmode->planar);
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if (_vid_wait_override->int_val) {
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Cvar_SetValue (vid_wait, (float) VID_WAIT_VSYNC);
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} else {
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Cvar_SetValue (vid_wait, (float) VID_WAIT_NONE);
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}
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D_InitCaches (vid_surfcache, vid_surfcachesize);
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return 1;
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}
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/*
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================
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VGA_SetPalette
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================
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*/
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void
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VGA_SetPalette (viddef_t *lvid, vmode_t * pcurrentmode, unsigned char *pal)
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{
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int shiftcomponents = 2;
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int i;
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UNUSED (lvid);
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UNUSED (pcurrentmode);
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dos_outportb (0x3c8, 0);
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for (i = 0; i < 768; i++)
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outportb (0x3c9, pal[i] >> shiftcomponents);
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}
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/*
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================
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VGA_SwapBuffersCopy
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================
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*/
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void
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VGA_SwapBuffersCopy (viddef_t *lvid, vmode_t * pcurrentmode, vrect_t *rects)
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{
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UNUSED (pcurrentmode);
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// TODO: can write a dword at a time
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// TODO: put in ASM
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// TODO: copy only specified rectangles
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if (VGA_planar) {
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// TODO: copy only specified rectangles
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VGA_UpdatePlanarScreen (lvid->buffer);
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} else {
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while (rects) {
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VGA_UpdateLinearScreen (lvid->buffer + rects->x +
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(rects->y * lvid->rowbytes),
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VGA_pagebase + rects->x +
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(rects->y * VGA_rowbytes), rects->width,
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rects->height, lvid->rowbytes,
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VGA_rowbytes);
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rects = rects->pnext;
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}
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}
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}
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/*
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================
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VGA_SwapBuffers
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================
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*/
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void
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VGA_SwapBuffers (viddef_t *lvid, vmode_t * pcurrentmode, vrect_t *rects)
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{
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UNUSED (lvid);
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if (vid_wait->int_val == VID_WAIT_VSYNC)
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VGA_WaitVsync ();
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VGA_SwapBuffersCopy (lvid, pcurrentmode, rects);
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}
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void
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VID_HandlePause (qboolean pause)
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{
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}
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