mirror of https://git.code.sf.net/p/quake/newtree
770 lines
16 KiB
C
770 lines
16 KiB
C
/*
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vid_svgalib.c
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Linux SVGALib video routines
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999-2000 Nelson Rush.
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Copyright (C) 1999-2000 Marcus Sundberg [mackan@stacken.kth.se]
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Copyright (C) 1999-2000 David Symonds [xoxus@usa.net]
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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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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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#if defined(HAVE_SYS_IO_H)
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# include <sys/io.h>
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#elif defined(HAVE_ASM_IO_H)
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# include <asm/io.h>
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#endif
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#include <stdio.h>
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#include <vga.h>
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#include <string.h>
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#include "cmd.h"
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#include "console.h"
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#include "cvar.h"
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#include "d_local.h"
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#include "host.h"
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#include "input.h"
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#include "qargs.h"
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#include "qendian.h"
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#include "sys.h"
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void VGA_UpdatePlanarScreen (void *srcbuffer);
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unsigned short d_8to16table[256];
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static int num_modes, current_mode;
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static vga_modeinfo *modes;
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static byte vid_current_palette[768];
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static int svgalib_inited = 0;
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static int svgalib_backgrounded = 0;
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static int UseDisplay = 1;
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static cvar_t *vid_mode;
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static cvar_t *vid_redrawfull;
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static cvar_t *vid_waitforrefresh;
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static char *framebuffer_ptr;
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static byte backingbuf[48 * 24];
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int VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes, VGA_planar;
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byte *VGA_pagebase;
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int VID_options_items = 0;
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void
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D_BeginDirectRect (int x, int y, byte * pbitmap, int width, int height)
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{
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int i, j, k, plane, reps, repshift, offset, vidpage, off;
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if (!svgalib_inited || !vid.direct || svgalib_backgrounded
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|| !vga_oktowrite ())return;
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if (vid.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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vidpage = 0;
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vga_setpage (0);
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if (VGA_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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outb (0x02, 0x3C4);
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outb (1 << plane, 0x3C5);
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outb (4, 0x3CE);
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outb (plane, 0x3CF);
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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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vid.direct[(y + i + k) * VGA_rowbytes +
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(x >> 2) + j];
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vid.direct[(y + i + k) * VGA_rowbytes + (x >> 2) + 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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offset = x + ((y << repshift) + i + j)
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* vid.rowbytes;
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off = offset % 0x10000;
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if ((offset / 0x10000) != vidpage) {
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vidpage = offset / 0x10000;
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vga_setpage (vidpage);
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}
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memcpy (&backingbuf[(i + j) * 24], vid.direct + off, width);
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memcpy (vid.direct + off,
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&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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void
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D_EndDirectRect (int x, int y, int width, int height)
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{
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int i, j, k, plane, reps, repshift, offset, vidpage, off;
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if (!svgalib_inited || !vid.direct || svgalib_backgrounded
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|| !vga_oktowrite ())return;
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if (vid.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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vidpage = 0;
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vga_setpage (0);
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if (VGA_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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outb (2, 0x3C4);
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outb (1 << plane, 0x3C5);
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outb (4, 0x3CE);
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outb (plane, 0x3CF);
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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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vid.direct[(y + i + k) * VGA_rowbytes + (x >> 2) + 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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offset = x + ((y << repshift) + i + j)
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* vid.rowbytes;
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off = offset % 0x10000;
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if ((offset / 0x10000) != vidpage) {
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vidpage = offset / 0x10000;
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vga_setpage (vidpage);
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}
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memcpy (vid.direct + off, &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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#if 0
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static void
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VID_Gamma_f (void)
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{
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float gamma, f, inf;
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unsigned char palette[768];
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int i;
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if (Cmd_Argc () == 2) {
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gamma = atof (Cmd_Argv (1));
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for (i = 0; i < 768; i++) {
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f = pow ((host_basepal[i] + 1) / 256.0, gamma);
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inf = f * 255 + 0.5;
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if (inf < 0)
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inf = 0;
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if (inf > 255)
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inf = 255;
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palette[i] = inf;
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}
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VID_SetPalette (palette);
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/* Force a surface cache flush */
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vid.recalc_refdef = 1;
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}
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}
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#endif
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static void
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VID_DescribeMode_f (void)
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{
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int modenum;
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modenum = atoi (Cmd_Argv (1));
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if ((modenum >= num_modes) || (modenum < 0) || !modes[modenum].width) {
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Con_Printf ("Invalid video mode: %d!\n", modenum);
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}
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Con_Printf ("%d: %d x %d - ", modenum,
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modes[modenum].width, modes[modenum].height);
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if (modes[modenum].bytesperpixel == 0) {
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Con_Printf ("ModeX\n");
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} else {
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Con_Printf ("%d bpp\n", modes[modenum].bytesperpixel << 3);
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}
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}
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static void
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VID_DescribeModes_f (void)
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{
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int i;
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for (i = 0; i < num_modes; i++) {
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if (modes[i].width) {
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Con_Printf ("%d: %d x %d - ", i, modes[i].width, modes[i].height);
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if (modes[i].bytesperpixel == 0)
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Con_Printf ("ModeX\n");
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else
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Con_Printf ("%d bpp\n", modes[i].bytesperpixel << 3);
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}
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}
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}
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/*
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VID_NumModes
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*/
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static int
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VID_NumModes (void)
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{
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int i, i1 = 0;
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for (i = 0; i < num_modes; i++) {
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i1 += modes[i].width ? 1 : 0;
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}
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return (i1);
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}
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static void
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VID_NumModes_f (void)
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{
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Con_Printf ("%d modes\n", VID_NumModes ());
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}
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static void
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VID_Debug_f (void)
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{
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Con_Printf ("mode: %d\n", current_mode);
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Con_Printf ("height x width: %d x %d\n", vid.height, vid.width);
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Con_Printf ("bpp: %d\n", modes[current_mode].bytesperpixel * 8);
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Con_Printf ("vid.aspect: %f\n", vid.aspect);
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}
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static void
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VID_InitModes (void)
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{
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int i;
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/* Get complete information on all modes */
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num_modes = vga_lastmodenumber () + 1;
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modes = malloc (num_modes * sizeof (vga_modeinfo));
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for (i = 0; i < num_modes; i++) {
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if (vga_hasmode (i)) {
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memcpy (&modes[i], vga_getmodeinfo (i), sizeof (vga_modeinfo));
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} else {
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modes[i].width = 0; // means not available
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}
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}
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/* Filter for modes we don't support */
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for (i = 0; i < num_modes; i++) {
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if (modes[i].bytesperpixel != 1 && modes[i].colors != 256) {
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modes[i].width = 0;
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}
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}
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}
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static int
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get_mode (char *name, int width, int height, int depth)
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{
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int i, ok, match;
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match = (!!width) + (!!height) * 2 + (!!depth) * 4;
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if (name) {
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i = vga_getmodenumber (name);
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if (!modes[i].width) {
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Sys_Printf ("Mode [%s] not supported\n", name);
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i = G320x200x256;
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}
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} else {
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for (i = 0; i < num_modes; i++) {
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if (modes[i].width) {
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ok = (modes[i].width == width)
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+ (modes[i].height == height) * 2
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+ (modes[i].bytesperpixel == depth / 8) * 4;
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if ((ok & match) == ok)
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break;
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}
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}
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if (i == num_modes) {
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Sys_Printf ("Mode %dx%d (%d bits) not supported\n",
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width, height, depth);
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i = G320x200x256;
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}
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}
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return i;
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}
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void
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VID_InitBuffers (void)
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{
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int buffersize, zbuffersize, cachesize;
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void *vid_surfcache;
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// Calculate the sizes we want first
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buffersize = vid.rowbytes * vid.height;
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zbuffersize = vid.width * vid.height * sizeof (*d_pzbuffer);
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cachesize = D_SurfaceCacheForRes (vid.width, vid.height);
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// Free the old screen buffer
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if (vid.buffer) {
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free (vid.buffer);
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vid.conbuffer = vid.buffer = NULL;
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}
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// Free the old z-buffer
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if (d_pzbuffer) {
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free (d_pzbuffer);
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d_pzbuffer = NULL;
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}
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// Free the old surface cache
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vid_surfcache = D_SurfaceCacheAddress ();
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if (vid_surfcache) {
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D_FlushCaches ();
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free (vid_surfcache);
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vid_surfcache = NULL;
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}
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// Allocate the new screen buffer
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vid.conbuffer = vid.buffer = calloc (buffersize, 1);
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if (!vid.conbuffer) {
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Sys_Error ("Not enough memory for video mode\n");
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}
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// Allocate the new z-buffer
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d_pzbuffer = calloc (zbuffersize, 1);
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if (!d_pzbuffer) {
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free (vid.buffer);
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vid.conbuffer = vid.buffer = NULL;
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Sys_Error ("Not enough memory for video mode\n");
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}
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// Allocate the new surface cache; free the z-buffer if we fail
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vid_surfcache = calloc (cachesize, 1);
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if (!vid_surfcache) {
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free (vid.buffer);
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free (d_pzbuffer);
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vid.conbuffer = vid.buffer = NULL;
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d_pzbuffer = NULL;
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Sys_Error ("Not enough memory for video mode\n");
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}
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D_InitCaches (vid_surfcache, cachesize);
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}
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void
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VID_Shutdown (void)
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{
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Sys_Printf ("VID_Shutdown\n");
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if (!svgalib_inited)
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return;
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if (UseDisplay) {
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vga_setmode (TEXT);
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}
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svgalib_inited = 0;
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}
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void
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VID_ShiftPalette (unsigned char *p)
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{
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VID_SetPalette (p);
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}
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void
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VID_SetPalette (byte * palette)
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{
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static int tmppal[256 * 3];
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int *tp;
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int i;
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if (!svgalib_inited || svgalib_backgrounded)
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return;
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memcpy (vid_current_palette, palette, sizeof (vid_current_palette));
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if (vga_getcolors () == 256) {
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tp = tmppal;
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for (i = 256 * 3; i; i--) {
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*(tp++) = *(palette++) >> 2;
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}
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if (UseDisplay && vga_oktowrite ()) {
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vga_setpalvec (0, 256, tmppal);
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}
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}
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}
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int
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VID_SetMode (int modenum, unsigned char *palette)
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{
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int err;
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if ((modenum >= num_modes) || (modenum < 0) || !modes[modenum].width) {
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Cvar_SetValue (vid_mode, current_mode);
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Con_Printf ("No such video mode: %d\n", modenum);
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return 0;
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}
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Cvar_SetValue (vid_mode, modenum);
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current_mode = modenum;
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vid.width = modes[current_mode].width;
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vid.height = modes[current_mode].height;
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VGA_width = modes[current_mode].width;
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VGA_height = modes[current_mode].height;
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VGA_planar = modes[current_mode].bytesperpixel == 0;
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VGA_rowbytes = modes[current_mode].linewidth;
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vid.rowbytes = modes[current_mode].linewidth;
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if (VGA_planar) {
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VGA_bufferrowbytes = modes[current_mode].linewidth * 4;
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vid.rowbytes = modes[current_mode].linewidth * 4;
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}
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vid.aspect = ((float) vid.height / (float) vid.width) * (320.0 / 240.0);
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vid.colormap = (pixel_t *) host_colormap;
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vid.fullbright = 256 - LittleLong (*((int *) vid.colormap + 2048));
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vid.conrowbytes = vid.rowbytes;
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vid.conwidth = vid.width;
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vid.conheight = vid.height;
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vid.numpages = 1;
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vid.maxwarpwidth = WARP_WIDTH;
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vid.maxwarpheight = WARP_HEIGHT;
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// alloc screen buffer, z-buffer, and surface cache
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VID_InitBuffers ();
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/* get goin' */
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err = vga_setmode (current_mode);
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if (err) {
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Sys_Error ("Video mode failed: %d\n", modenum);
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}
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VID_SetPalette (palette);
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VGA_pagebase = vid.direct = framebuffer_ptr = (char *) vga_getgraphmem ();
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#if 0
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if (vga_setlinearaddressing () > 0) {
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framebuffer_ptr = (char *) vga_getgraphmem ();
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}
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#endif
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if (!framebuffer_ptr) {
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Sys_Error ("This mode isn't hapnin'\n");
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}
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vga_setpage (0);
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svgalib_inited = 1;
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/* Force a surface cache flush */
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vid.recalc_refdef = 1;
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return 1;
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}
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static void
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goto_background (void)
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{
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svgalib_backgrounded = 1;
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}
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static void
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comefrom_background (void)
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{
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svgalib_backgrounded = 0;
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}
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void
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VID_Init (unsigned char *palette)
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{
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int w, h, d;
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int err;
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// plugin_load("in_svgalib.so");
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if (svgalib_inited)
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return;
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#if 0
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Cmd_AddCommand ("gamma", VID_Gamma_f, "Brightness level");
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#endif
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if (UseDisplay) {
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err = vga_init ();
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if (err)
|
|
Sys_Error ("SVGALib failed to allocate a new VC\n");
|
|
|
|
if (vga_runinbackground_version () == 1) {
|
|
Con_Printf ("SVGALIB background support detected\n");
|
|
vga_runinbackground (VGA_GOTOBACK, goto_background);
|
|
vga_runinbackground (VGA_COMEFROMBACK, comefrom_background);
|
|
vga_runinbackground (1);
|
|
} else {
|
|
vga_runinbackground (0);
|
|
}
|
|
|
|
VID_InitModes ();
|
|
|
|
Cmd_AddCommand ("vid_nummodes", VID_NumModes_f, "Reports the total number of video modes available.");
|
|
Cmd_AddCommand ("vid_describemode", VID_DescribeMode_f, "Report information on specified video mode, default is current.\n"
|
|
"(vid_describemode (mode))");
|
|
Cmd_AddCommand ("vid_describemodes", VID_DescribeModes_f, "Report information on all video modes.");
|
|
Cmd_AddCommand ("vid_debug", VID_Debug_f, "FIXME: No Description");
|
|
|
|
/* Interpret command-line params */
|
|
w = h = d = 0;
|
|
if (getenv ("GSVGAMODE")) {
|
|
current_mode = get_mode (getenv ("GSVGAMODE"), w, h, d);
|
|
} else if (COM_CheckParm ("-mode")) {
|
|
current_mode =
|
|
get_mode (com_argv[COM_CheckParm ("-mode") + 1], w, h, d);
|
|
} else if (COM_CheckParm ("-w") || COM_CheckParm ("-h")
|
|
|| COM_CheckParm ("-d")) {
|
|
if (COM_CheckParm ("-w")) {
|
|
w = atoi (com_argv[COM_CheckParm ("-w") + 1]);
|
|
}
|
|
if (COM_CheckParm ("-h")) {
|
|
h = atoi (com_argv[COM_CheckParm ("-h") + 1]);
|
|
}
|
|
if (COM_CheckParm ("-d")) {
|
|
d = atoi (com_argv[COM_CheckParm ("-d") + 1]);
|
|
}
|
|
current_mode = get_mode (0, w, h, d);
|
|
} else {
|
|
current_mode = G320x200x256;
|
|
}
|
|
|
|
/* Set vid parameters */
|
|
VID_SetMode (current_mode, palette);
|
|
Con_CheckResize (); // Now that we have a window size, fix console
|
|
|
|
VID_InitGamma (palette);
|
|
VID_SetPalette (palette);
|
|
}
|
|
}
|
|
|
|
void
|
|
VID_Init_Cvars ()
|
|
{
|
|
vid_mode = Cvar_Get ("vid_mode", "5", CVAR_NONE, NULL, "Sets the video mode");
|
|
vid_redrawfull = Cvar_Get ("vid_redrawfull", "0", CVAR_NONE, NULL, "Redraw entire screen each frame instead of just dirty areas");
|
|
vid_waitforrefresh = Cvar_Get ("vid_waitforrefresh", "0",
|
|
CVAR_ARCHIVE, NULL, "Wait for vertical retrace before drawing next frame");
|
|
}
|
|
|
|
|
|
void
|
|
VID_Update (vrect_t *rects)
|
|
{
|
|
if (!svgalib_inited || svgalib_backgrounded)
|
|
return;
|
|
|
|
if (!vga_oktowrite ()) {
|
|
/* Can't update screen if it's not active */
|
|
return;
|
|
}
|
|
|
|
if (vid_waitforrefresh->int_val) {
|
|
vga_waitretrace ();
|
|
}
|
|
|
|
if (VGA_planar) {
|
|
VGA_UpdatePlanarScreen (vid.buffer);
|
|
} else if (vid_redrawfull->int_val) {
|
|
int total = vid.rowbytes * vid.height;
|
|
int offset;
|
|
|
|
for (offset = 0; offset < total; offset += 0x10000) {
|
|
vga_setpage (offset / 0x10000);
|
|
memcpy (framebuffer_ptr, vid.buffer + offset,
|
|
((total - offset > 0x10000) ? 0x10000 : (total - offset)));
|
|
}
|
|
} else {
|
|
int ycount;
|
|
int offset;
|
|
int vidpage = 0;
|
|
|
|
vga_setpage (0);
|
|
|
|
while (rects) {
|
|
ycount = rects->height;
|
|
offset = rects->y * vid.rowbytes + rects->x;
|
|
while (ycount--) {
|
|
register int i = offset % 0x10000;
|
|
|
|
if ((offset / 0x10000) != vidpage) {
|
|
vidpage = offset / 0x10000;
|
|
vga_setpage (vidpage);
|
|
}
|
|
if (rects->width + i > 0x10000) {
|
|
memcpy (framebuffer_ptr + i,
|
|
vid.buffer + offset, 0x10000 - i);
|
|
vga_setpage (++vidpage);
|
|
memcpy (framebuffer_ptr,
|
|
vid.buffer + offset + 0x10000 - i,
|
|
rects->width - 0x10000 + i);
|
|
} else {
|
|
memcpy (framebuffer_ptr + i,
|
|
vid.buffer + offset, rects->width);
|
|
}
|
|
offset += vid.rowbytes;
|
|
}
|
|
rects = rects->pnext;
|
|
}
|
|
}
|
|
|
|
if (vid_mode->int_val != current_mode) {
|
|
VID_SetMode (vid_mode->int_val, vid_current_palette);
|
|
}
|
|
}
|
|
|
|
|
|
static int dither = 0;
|
|
|
|
void
|
|
VID_DitherOn (void)
|
|
{
|
|
if (dither == 0) {
|
|
#if 0
|
|
R_ViewChanged (&vrect, sb_lines, vid.aspect);
|
|
#endif
|
|
dither = 1;
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
VID_DitherOff (void)
|
|
{
|
|
if (dither) {
|
|
#if 0
|
|
R_ViewChanged (&vrect, sb_lines, vid.aspect);
|
|
#endif
|
|
dither = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
VID_ModeInfo
|
|
*/
|
|
char *
|
|
VID_ModeInfo (int modenum)
|
|
{
|
|
static char *badmodestr = "Bad mode number";
|
|
static char modestr[40];
|
|
|
|
if (modenum == 0) {
|
|
snprintf (modestr, sizeof (modestr), "%d x %d, %d bpp",
|
|
vid.width, vid.height, modes[current_mode].bytesperpixel * 8);
|
|
return (modestr);
|
|
} else {
|
|
return (badmodestr);
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
VID_ExtraOptionDraw (unsigned int options_draw_cursor)
|
|
{
|
|
/* No extra option menu items yet */
|
|
}
|
|
|
|
|
|
void
|
|
VID_ExtraOptionCmd (int option_cursor)
|
|
{
|
|
#if 0
|
|
switch (option_cursor) {
|
|
case 1: // Always start with 1
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
VID_LockBuffer (void)
|
|
{
|
|
}
|
|
|
|
void
|
|
VID_UnlockBuffer (void)
|
|
{
|
|
}
|
|
|
|
void
|
|
VID_SetCaption (char *text)
|
|
{
|
|
}
|
|
|
|
qboolean
|
|
VID_SetGamma (double gamma)
|
|
{
|
|
return false; //FIXME
|
|
}
|