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SRB2/src/djgppdos/vid_vesa.c

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SRB2 2.1 release
2014-03-15 16:59:03 +00:00
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright (C) 1998-2000 by DooM Legacy Team.
//
// 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.
//-----------------------------------------------------------------------------
/// \file
/// \brief extended vesa VESA2.0 video modes i/o
#include <stdlib.h>
#include "../i_system.h" //I_Error()
#include "vid_vesa.h"
#include "../doomdef.h" //MAXVIDWIDTH, MAXVIDHEIGHT
#include "../screen.h"
#include <dpmi.h>
#include <go32.h>
#include <sys/farptr.h>
#include <sys/movedata.h>
#include <sys/segments.h>
#include <sys/nearptr.h>
#include "../console.h"
#include "../command.h" //added:21-03-98: vid_xxx commands
#include "../i_video.h"
// PROTOS
static vmode_t *VID_GetModePtr (int modenum);
static int VID_VesaGetModeInfo (int modenum);
static void VID_VesaGetExtraModes (void);
static INT32 VID_VesaInitMode (viddef_t *lvid, vmode_t *pcurrentmode);
static void VID_Command_NumModes_f (void);
static void VID_Command_ModeInfo_f (void);
static void VID_Command_ModeList_f (void);
static void VID_Command_Mode_f (void);
consvar_t cv_vidwait = {"vid_wait", "On", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
static consvar_t cv_stretch = {"stretch", "On", CV_SAVE|CV_NOSHOWHELP, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
#define VBEVERSION 2 // we need vesa2 or higher
// -----------------------------------------------------
#define MASK_LINEAR(addr) (addr & 0x000FFFFF)
#define RM_TO_LINEAR(addr) (((addr & 0xFFFF0000) >> 12) + (addr & 0xFFFF))
#define RM_OFFSET(addr) (addr & 0xF)
#define RM_SEGMENT(addr) ((addr >> 4) & 0xFFFF)
// -----------------------------------------------------
static int totalvidmem;
static vmode_t vesa_modes[MAX_VESA_MODES] = {{NULL, NULL, 0, 0, 0, 0, 0, 0, NULL, NULL, 0}};
static vesa_extra_t vesa_extra[MAX_VESA_MODES];
//this is the only supported non-vesa mode : standard 320x200x256c.
#define NUMVGAVIDMODES 1
static INT32 VGA_InitMode (viddef_t *lvid, vmode_t *pcurrentmode);
static char vgamode1[] ="320x200";
static vmode_t vgavidmodes[NUMVGAVIDMODES] = {
{
NULL,
vgamode1,
320, 200, //(200.0/320.0)*(320.0/240.0),
320, 1, // rowbytes, bytes per pixel
0, 1,
NULL,
VGA_InitMode, 0
}
};
static char names[MAX_VESA_MODES][10];
//----------------------------i_video.c------------------------------------
// these ones should go to i_video.c, but I prefer keep them away from the
// doom sources until the vesa stuff is ok.
static int numvidmodes; //total number of video modes, vga, vesa1, vesa2.
static vmode_t *pvidmodes; //start of videomodes list.
static vmode_t *pcurrentmode; // the current active videomode.
//----------------------------i_video.c------------------------------------
// table des modes videos.
// seul le mode 320x200x256c standard VGA est support<72> sans le VESA.
// ce mode est le mode num<75>ro 0 dans la liste.
typedef struct
{
int modenum; // vesa vbe2.0 modenum
int mode_attributes;
int winasegment;
int winbsegment;
int bytes_per_scanline; // bytes per logical scanline (+16)
int win; // window number (A=0, B=1)
int win_size; // window size (+6)
int granularity; // how finely i can set the window in vid mem (+4)
int width, height; // displayed width and height (+18, +20)
int bits_per_pixel; // er, better be 8, 15, 16, 24, or 32 (+25)
int bytes_per_pixel; // er, better be 1, 2, or 4
int memory_model; // and better be 4 or 6, packed or direct color (+27)
int num_pages; // number of complete frame buffer pages (+29)
int red_width; // the # of bits in the red component (+31)
int red_pos; // the bit position of the red component (+32)
int green_width; // etc.. (+33)
int green_pos; // (+34)
int blue_width; // (+35)
int blue_pos; // (+36)
int pptr;
int pagesize;
int numpages;
} modeinfo_t;
static vbeinfoblock_t vesainfo;
static vesamodeinfo_t vesamodeinfo;
// ------------------------------------------------------------------------
// DOS stuff
// ------------------------------------------------------------------------
static unsigned long conventional_memory = (unsigned long)-1;
FUNCINLINE static ATTRINLINE void map_in_conventional_memory(void)
{
if (conventional_memory == (unsigned long)-1)
{
if (__djgpp_nearptr_enable())
{
conventional_memory = __djgpp_conventional_base;
}
}
}
// Converts a flat 32 bit ptr to a realmode 0x12345 type ptr (seg<<4 + offs)
#if 0
unsigned int ptr2real(void *ptr)
{
map_in_conventional_memory();
return (int)ptr - conventional_memory;
}
#endif
// Converts 0x12345 (seg<<4+offs) realmode ptr to a flat 32bit ptr
FUNCINLINE static ATTRINLINE void *real2ptr(unsigned int real)
{
map_in_conventional_memory();
return (void *) (real + conventional_memory);
}
// ------------------------------------------------------------------------
/* ======================================================================== */
// Add the standard VGA video modes (only one now) to the video modes list.
/* ======================================================================== */
static inline void VGA_Init(void)
{
vgavidmodes[NUMVGAVIDMODES-1].pnext = pvidmodes;
pvidmodes = &vgavidmodes[0];
numvidmodes += NUMVGAVIDMODES;
}
//added:30-01-98: return number of video modes in pvidmodes list
INT32 VID_NumModes(void)
{
return numvidmodes;
}
//added:21-03-98: return info on video mode
FUNCINLINE static ATTRINLINE const char *VID_ModeInfo (int modenum, char **ppheader)
{
static const char *badmodestr = "Bad video mode number\n";
vmode_t *pv;
pv = VID_GetModePtr (modenum);
if (!pv)
{
if (ppheader)
*ppheader = NULL;
return badmodestr;
}
else
{
//if (ppheader)
// *ppheader = pv->header;
return pv->name;
}
}
//added:03-02-98: return a video mode number from the dimensions
INT32 VID_GetModeForSize( INT32 w, INT32 h)
{
vmode_t *pv;
int modenum;
pv = pvidmodes;
for (modenum=0; pv!=NULL; pv=pv->pnext,modenum++ )
{
if ( pv->width==(unsigned)w && pv->height==(unsigned)h )
return modenum;
}
return 0;
}
/* ======================================================================== */
//
/* ======================================================================== */
void VID_Init (void)
{
COM_AddCommand ("vid_nummodes", VID_Command_NumModes_f);
COM_AddCommand ("vid_modeinfo", VID_Command_ModeInfo_f);
COM_AddCommand ("vid_modelist", VID_Command_ModeList_f);
COM_AddCommand ("vid_mode", VID_Command_Mode_f);
CV_RegisterVar (&cv_vidwait);
CV_RegisterVar (&cv_stretch);
//setup the videmodes list,
// note that mode 0 must always be VGA mode 0x13
pvidmodes = NULL;
pcurrentmode = NULL;
numvidmodes = 0;
// setup the vesa_modes list
VID_VesaGetExtraModes ();
// the game boots in 320x200 standard VGA, but
// we need a highcolor mode to run the game in highcolor
if (highcolor && numvidmodes==0)
I_Error ("No 15bit highcolor VESA2 video mode found, cannot run in highcolor.\n");
// add the vga modes at the start of the modes list
VGA_Init();
#ifdef DEBUG
CONS_Printf("VID_SetMode(%d)\n",vid.modenum);
#endif
VID_SetMode (0); //vid.modenum);
#ifdef DEBUG
CONS_Printf("after VID_SetMode\n");
CONS_Printf("vid.width %d\n",vid.width);
CONS_Printf("vid.height %d\n",vid.height);
CONS_Printf("vid.buffer %x\n",vid.buffer);
CONS_Printf("vid.rowbytes %d\n",vid.rowbytes);
CONS_Printf("vid.numpages %d\n",vid.numpages);
CONS_Printf("vid.recalc %d\n",vid.recalc);
CONS_Printf("vid.direct %x\n",vid.direct);
#endif
}
// ========================================================================
// Returns a vmode_t from the video modes list, given a video mode number.
// ========================================================================
vmode_t *VID_GetModePtr (int modenum)
{
vmode_t *pv;
pv = pvidmodes;
if (!pv)
I_Error ("VID_error 1\n");
while (modenum--)
{
pv = pv->pnext;
if (!pv)
I_Error ("VID_error 2\n");
}
return pv;
}
//added:30-01-98:return the name of a video mode
const char *VID_GetModeName (INT32 modenum)
{
return (VID_GetModePtr(modenum))->name;
}
// ========================================================================
// Sets a video mode
// ========================================================================
INT32 VID_SetMode (INT32 modenum) //, UINT8 *palette)
{
int vstat;
vmode_t *pnewmode, *poldmode;
if ((modenum >= numvidmodes) || (modenum < 0))
{
if (pcurrentmode == NULL)
{
modenum = 0; // mode hasn't been set yet, so initialize to base
// mode since they gave us an invalid initial mode
}
else
{
//nomodecheck = true;
I_Error ("Unknown video mode: %d\n", modenum);
//nomodecheck = false;
return 0;
}
}
pnewmode = VID_GetModePtr (modenum);
if (pnewmode == pcurrentmode)
return 1; // already in the desired mode
// initialize the new mode
poldmode = pcurrentmode;
pcurrentmode = pnewmode;
// initialize vidbuffer size for setmode
vid.width = pcurrentmode->width;
vid.height = pcurrentmode->height;
//vid.aspect = pcurrentmode->aspect;
vid.rowbytes = pcurrentmode->rowbytes;
vid.bpp = pcurrentmode->bytesperpixel;
//debug
//if (vid.rowbytes != vid.width)
// I_Error("vidrowbytes (%d) <> vidwidth(%d)\n",vid.rowbytes,vid.width);
vstat = (*pcurrentmode->setmode) (&vid, pcurrentmode);
if (vstat < 1)
{
if (vstat == 0)
{
// harware could not setup mode
//if (!VID_SetMode (vid.modenum))
// I_Error ("VID_SetMode: couldn't set video mode (hard failure)");
I_Error("Couldn't set video mode %d\n", modenum);
}
else
if (vstat == -1)
{
CONS_Printf ("Not enough mem for VID_SetMode...\n");
// not enough memory; just put things back the way they were
pcurrentmode = poldmode;
vid.width = pcurrentmode->width;
vid.height = pcurrentmode->height;
vid.rowbytes = pcurrentmode->rowbytes;
vid.bpp = pcurrentmode->bytesperpixel;
return 0;
}
}
vid.modenum = modenum;
//printf ("%s\n", VID_ModeInfo (vid.modenum, NULL));
//added:20-01-98: recalc all tables and realloc buffers based on
// vid values.
vid.recalc = 1;
if (!cv_stretch.value && (float)vid.width/vid.height != ((float)BASEVIDWIDTH/BASEVIDHEIGHT))
vid.height = (int)(vid.width * ((float)BASEVIDHEIGHT/BASEVIDWIDTH));// Adjust the height to match
return 1;
}
// converts a segm:offs 32bit pair to a 32bit flat ptr
#if 0
void *VID_ExtraFarToLinear (void *ptr)
{
int temp;
temp = (int)ptr;
return real2ptr (((temp & 0xFFFF0000) >> 12) + (temp & 0xFFFF));
}
#endif
// ========================================================================
// Helper function for VID_VesaGetExtraModes
// In: vesa mode number, from the vesa videomodenumbers list
// Out: false, if no info for given modenum
// ========================================================================
int VID_VesaGetModeInfo (int modenum)
{
int bytes_per_pixel;
unsigned int i;
__dpmi_regs regs;
for (i=0; i<sizeof (vesamodeinfo_t); i++)
_farpokeb(_dos_ds, MASK_LINEAR(__tb)+i, 0);
regs.x.ax = 0x4f01;
regs.x.di = RM_OFFSET(__tb);
regs.x.es = RM_SEGMENT(__tb);
regs.x.cx = modenum;
__dpmi_int(0x10, &regs);
if (regs.h.ah)
return false;
else
{
dosmemget (MASK_LINEAR(__tb), sizeof (vesamodeinfo_t), &vesamodeinfo);
bytes_per_pixel = (vesamodeinfo.BitsPerPixel+1)/8;
// we add either highcolor or lowcolor video modes, not the two
if (highcolor && (vesamodeinfo.BitsPerPixel != 15))
return false;
if (!highcolor && (vesamodeinfo.BitsPerPixel != 8))
return false;
if ((bytes_per_pixel > 2) ||
(vesamodeinfo.XResolution > MAXVIDWIDTH) ||
(vesamodeinfo.YResolution > MAXVIDHEIGHT))
{
return false;
}
// we only want color graphics modes that are supported by the hardware
if ((vesamodeinfo.ModeAttributes &
(MODE_SUPPORTED_IN_HW | COLOR_MODE | GRAPHICS_MODE) ) !=
(MODE_SUPPORTED_IN_HW | COLOR_MODE | GRAPHICS_MODE))
{
return false;
}
// we only work with linear frame buffers, except for 320x200,
// which is linear when banked at 0xA000
if (!(vesamodeinfo.ModeAttributes & LINEAR_FRAME_BUFFER))
{
if ((vesamodeinfo.XResolution != 320) ||
(vesamodeinfo.YResolution != 200))
{
return false;
}
}
// pagesize
if ((vesamodeinfo.BytesPerScanLine * vesamodeinfo.YResolution)
> totalvidmem)
{
return false;
}
vesamodeinfo.NumberOfImagePages = 1;
#ifdef DEBUG
CONS_Printf("VID: (VESA) info for mode 0x%x\n", modeinfo.modenum);
CONS_Printf(" mode attrib = 0x%0x\n", modeinfo.mode_attributes);
CONS_Printf(" win a attrib = 0x%0x\n", *(UINT8 *)(infobuf+2));
CONS_Printf(" win b attrib = 0x%0x\n", *(UINT8 *)(infobuf+3));
CONS_Printf(" win a seg 0x%0x\n", (int) modeinfo.winasegment);
CONS_Printf(" win b seg 0x%0x\n", (int) modeinfo.winbsegment);
CONS_Printf(" bytes per scanline = %d\n",
modeinfo.bytes_per_scanline);
CONS_Printf(" width = %d, height = %d\n", modeinfo.width,
modeinfo.height);
CONS_Printf(" win = %c\n", 'A' + modeinfo.win);
CONS_Printf(" win granularity = %d\n", modeinfo.granularity);
CONS_Printf(" win size = %d\n", modeinfo.win_size);
CONS_Printf(" bits per pixel = %d\n", modeinfo.bits_per_pixel);
CONS_Printf(" bytes per pixel = %d\n", modeinfo.bytes_per_pixel);
CONS_Printf(" memory model = 0x%x\n", modeinfo.memory_model);
CONS_Printf(" num pages = %d\n", modeinfo.num_pages);
CONS_Printf(" red width = %d\n", modeinfo.red_width);
CONS_Printf(" red pos = %d\n", modeinfo.red_pos);
CONS_Printf(" green width = %d\n", modeinfo.green_width);
CONS_Printf(" green pos = %d\n", modeinfo.green_pos);
CONS_Printf(" blue width = %d\n", modeinfo.blue_width);
CONS_Printf(" blue pos = %d\n", modeinfo.blue_pos);
CONS_Printf(" phys mem = %x\n", modeinfo.pptr);
#endif
}
return true;
}
// ========================================================================
// Get extended VESA modes information, keep the ones that we support,
// so they'll be available in the game Video menu.
// ========================================================================
#define MAXVESADESC 100
static char vesadesc[MAXVESADESC] = "";
void VID_VesaGetExtraModes (void)
{
unsigned int i;
unsigned long addr;
int nummodes;
__dpmi_meminfo phys_mem_info;
unsigned long mode_ptr;
__dpmi_regs regs;
// make a copy of the video modes list! else trash in __tb
UINT16 vmode[MAX_VESA_MODES+1];
int numvmodes;
UINT16 vesamode;
// new ugly stuff...
for (i=0; i<sizeof (vbeinfoblock_t); i++)
_farpokeb(_dos_ds, MASK_LINEAR(__tb)+i, 0);
dosmemput("VBE2", 4, MASK_LINEAR(__tb));
// see if VESA support is available
regs.x.ax = 0x4f00;
regs.x.di = RM_OFFSET(__tb);
regs.x.es = RM_SEGMENT(__tb);
__dpmi_int(0x10, &regs);
if (regs.h.ah)
goto no_vesa;
dosmemget(MASK_LINEAR(__tb), sizeof (vbeinfoblock_t), &vesainfo);
if (strncmp((void *)vesainfo.VESASignature, "VESA", 4) != 0)
{
no_vesa:
CONS_Printf ("No VESA driver\n");
return;
}
if (vesainfo.VESAVersion < (VBEVERSION<<8))
{
CONS_Printf ("VESA VBE %d.0 not available\n", VBEVERSION);
return;
}
//
// vesa version number
//
CONS_Printf ("%4.4s %d.%d (", vesainfo.VESASignature,
vesainfo.VESAVersion>>8,
vesainfo.VESAVersion&0xFF);
//
// vesa description string
//
i = 0;
addr = RM_TO_LINEAR(vesainfo.OemStringPtr);
_farsetsel(_dos_ds);
while (_farnspeekb(addr) != 0)
{
vesadesc[i++] = _farnspeekb(addr++);
if (i == MAXVESADESC-1)
break;
}
vesadesc[i]=0;
CONS_Printf ("%s)\n",vesadesc);
totalvidmem = vesainfo.TotalMemory << 16;
//
// find 8 bit modes
//
numvmodes = 0;
mode_ptr = RM_TO_LINEAR(vesainfo.VideoModePtr);
while ((vmode[numvmodes] = _farpeekw(_dos_ds, mode_ptr)) != 0xFFFF)
{
numvmodes++;
if ( numvmodes == MAX_VESA_MODES )
break;
mode_ptr += 2;
}
vmode[numvmodes] = 0xffff;
nummodes = 0; // number of video modes accepted for the game
numvmodes=0; // go again through vmodes table
while ( ((vesamode=vmode[numvmodes++]) != 0xFFFF) && (nummodes < MAX_VESA_MODES) )
{
//fill the modeinfo struct.
if (VID_VesaGetModeInfo (vesamode))
{
vesa_modes[nummodes].pnext = &vesa_modes[nummodes+1];
if (vesamodeinfo.XResolution > 999)
{
if (vesamodeinfo.YResolution > 999)
{
sprintf (&names[nummodes][0], "%4dx%4d", vesamodeinfo.XResolution,
vesamodeinfo.YResolution);
names[nummodes][9] = 0;
}
else
{
sprintf (&names[nummodes][0], "%4dx%3d", vesamodeinfo.XResolution,
vesamodeinfo.YResolution);
names[nummodes][8] = 0;
}
}
else
{
if (vesamodeinfo.YResolution > 999)
{
sprintf (&names[nummodes][0], "%3dx%4d", vesamodeinfo.XResolution,
vesamodeinfo.YResolution);
names[nummodes][8] = 0;
}
else
{
sprintf (&names[nummodes][0], "%3dx%3d", vesamodeinfo.XResolution,
vesamodeinfo.YResolution);
names[nummodes][7] = 0;
}
}
vesa_modes[nummodes].name = &names[nummodes][0];
vesa_modes[nummodes].width = vesamodeinfo.XResolution;
vesa_modes[nummodes].height = vesamodeinfo.YResolution;
//added:20-01-98:aspect ratio to be implemented...
vesa_modes[nummodes].rowbytes = vesamodeinfo.BytesPerScanLine;
vesa_modes[nummodes].windowed = 0;
vesa_modes[nummodes].pextradata = &vesa_extra[nummodes];
vesa_modes[nummodes].setmode = VID_VesaInitMode;
if (vesamodeinfo.ModeAttributes & LINEAR_FRAME_BUFFER)
{
// add linear bit to mode for linear modes
vesa_extra[nummodes].vesamode = vesamode | LINEAR_MODE;
vesa_modes[nummodes].numpages = 1; //vesamodeinfo.NumberOfImagePages;
phys_mem_info.address = (int)vesamodeinfo.PhysBasePtr;
phys_mem_info.size = 0x400000;
// returns -1 on error
if (__dpmi_physical_address_mapping(&phys_mem_info))
{
//skip this mode, it doesnt work
continue;
}
// if physical mapping was ok... convert the selector:offset
vesa_extra[nummodes].plinearmem =
real2ptr (phys_mem_info.address);
// lock the region
__dpmi_lock_linear_region (&phys_mem_info);
}
else
{
// banked at 0xA0000
vesa_extra[nummodes].vesamode = vesamode;
//vesa_extra[nummodes].pages[0] = 0;
vesa_extra[nummodes].plinearmem =
real2ptr (vesamodeinfo.WinASegment<<4);
vesa_modes[nummodes].numpages = 1; //modeinfo.numpages;
}
vesa_modes[nummodes].bytesperpixel = (vesamodeinfo.BitsPerPixel+1)/8;
nummodes++;
}
}
// add the VESA modes at the start of the mode list (if there are any)
if (nummodes)
{
vesa_modes[nummodes-1].pnext = NULL; //pvidmodes;
pvidmodes = &vesa_modes[0];
numvidmodes += nummodes;
}
}
// ========================================================================
// Free the video buffer of the last video mode,
// allocate a new buffer for the video mode to set.
// ========================================================================
static boolean VID_FreeAndAllocVidbuffer (viddef_t *lvid)
{
int vidbuffersize;
vidbuffersize = (lvid->width * lvid->height * lvid->bpp * NUMSCREENS); //status bar
// free allocated buffer for previous video mode
if (lvid->buffer!=NULL)
{
free(lvid->buffer);
}
// allocate the new screen buffer
if ( (lvid->buffer = (UINT8 *) malloc(vidbuffersize))==NULL )
return false;
// initially clear the video buffer
memset (lvid->buffer, 0x00, vidbuffersize);
#ifdef DEBUG
CONS_Printf("VID_FreeAndAllocVidbuffer done, vidbuffersize: %x\n",vidbuffersize);
#endif
return true;
}
// ========================================================================
// Set video mode routine for STANDARD VGA MODES (NO HIGHCOLOR)
// Out: 1 ok,
// 0 hardware could not set mode,
// -1 no mem
// ========================================================================
static INT32 VGA_InitMode (viddef_t *lvid, vmode_t *currentmodep)
{
__dpmi_regs regs;
if (!VID_FreeAndAllocVidbuffer (lvid))
return -1; //no mem
//added:26-01-98: should clear video mem here
//set mode 0x13
regs.h.ah = 0;
regs.h.al = 0x13;
__dpmi_int(0x10, &regs);
// here it is the standard VGA 64k window, not an LFB
// (you could have 320x200x256c with LFB in the vesa modes)
lvid->direct = (UINT8 *) real2ptr (0xa0000);
lvid->u.numpages = 1;
lvid->bpp = currentmodep->bytesperpixel;
return 1;
}
// ========================================================================
// Set video mode routine for VESA video modes, see VID_SetMode()
// Out: 1 ok,
// 0 hardware could not set mode,
// -1 no mem
// ========================================================================
INT32 VID_VesaInitMode (viddef_t *lvid, vmode_t *currentmodep)
{
vesa_extra_t *pextra;
__dpmi_regs regs;
pextra = currentmodep->pextradata;
#ifdef DEBUG
CONS_Printf("VID_VesaInitMode...\n");
CONS_Printf(" currentmodep->name %s\n",currentmodep->name);
CONS_Printf(" width %d\n",currentmodep->width);
CONS_Printf(" height %d\n",currentmodep->height);
CONS_Printf(" rowbytes %d\n",currentmodep->rowbytes);
CONS_Printf(" windowed %d\n",currentmodep->windowed);
CONS_Printf(" numpages %d\n",currentmodep->numpages);
CONS_Printf(" currentmodep->pextradata :\n");
CONS_Printf(" ->vesamode %x\n",pextra->vesamode);
CONS_Printf(" ->plinearmem %x\n\n",pextra->plinearmem);
#endif
//added:20-01-98:no page flipping now... TO DO!!!
lvid->u.numpages = 1;
// clean up any old vid buffer lying around, alloc new if needed
if (!VID_FreeAndAllocVidbuffer (lvid))
return -1; //no mem
//added:20-01-98: should clear video mem here
// set the mode
regs.x.ax = 0x4f02;
regs.x.bx = pextra->vesamode;
__dpmi_int (0x10, &regs);
if (regs.x.ax != 0x4f)
return 0; // could not set mode
//added:20-01-98: should setup wait_vsync flag, currentpage here...
// plus check for display_enable bit
//added:20-01-98: here we should set the page if page flipping...
// points to LFB, or the start of VGA mem.
lvid->direct = pextra->plinearmem;
lvid->bpp = currentmodep->bytesperpixel;
return 1;
}
// ========================================================================
// VIDEO MODE CONSOLE COMMANDS
// ========================================================================
// vid_nummodes
//
//added:21-03-98:
void VID_Command_NumModes_f (void)
{
int nummodes;
nummodes = VID_NumModes ();
CONS_Printf ("%d video mode(s) available(s)\n", nummodes);
}
// vid_modeinfo <modenum>
//
void VID_Command_ModeInfo_f (void)
{
vmode_t *pv;
int modenum;
if (COM_Argc()!=2)
modenum = vid.modenum; // describe the current mode
else
modenum = atoi (COM_Argv(1)); // .. the given mode number
if (modenum >= VID_NumModes())
{
CONS_Printf ("No such video mode\n");
return;
}
pv = VID_GetModePtr (modenum);
CONS_Printf ("%s\n", VID_ModeInfo (modenum, NULL));
CONS_Printf ("width : %d\n"
"height: %d\n"
"bytes per scanline: %d\n"
"bytes per pixel: %d\n"
"numpages: %d\n",
pv->width,
pv->height,
pv->rowbytes,
pv->bytesperpixel,
pv->numpages );
}
// vid_modelist
//
void VID_Command_ModeList_f (void)
{
int i, nummodes;
const char *pinfo;
char *pheader;
vmode_t *pv;
boolean na;
na = false;
nummodes = VID_NumModes ();
for (i=0 ; i<nummodes ; i++)
{
pv = VID_GetModePtr (i);
pinfo = VID_ModeInfo (i, &pheader);
if (i==0 || pv->bytesperpixel==1)
CONS_Printf ("%d: %s\n", i, pinfo);
else
CONS_Printf ("%d: %s (hicolor)\n", i, pinfo);
}
}
// vid_mode <modenum>
//
void VID_Command_Mode_f (void)
{
int modenum;
if (COM_Argc()!=2)
{
CONS_Printf ("vid_mode <modenum> : set video mode\n");
return;
}
modenum = atoi(COM_Argv(1));
if (modenum >= VID_NumModes())
CONS_Printf ("No such video mode\n");
else
// request vid mode change
setmodeneeded = modenum+1;
}
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