forked from KolibriOS/kolibrios
796 lines
19 KiB
C
796 lines
19 KiB
C
/*
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//
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// vid_ext.c: extended video modes
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// in this implementation, VESA-specific DOS video stuff
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//
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// TODO: make dependencies on vid_vga.c explicit or eliminate them
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#include <stdlib.h>
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#include <dos.h>
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#include "quakedef.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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#define MODE_SUPPORTED_IN_HW 0x0001
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#define COLOR_MODE 0x0008
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#define GRAPHICS_MODE 0x0010
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#define VGA_INCOMPATIBLE 0x0020
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#define LINEAR_FRAME_BUFFER 0x0080
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#define LINEAR_MODE 0x4000
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#define VESA_DONT_WAIT_VSYNC 0 // when page flipping
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#define VESA_WAIT_VSYNC 0x80
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#define MAX_VESA_MODES 30 // we'll just take the first 30 if there
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// are more
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typedef struct {
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int pages[3]; // either 2 or 3 is valid
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int vesamode; // LINEAR_MODE set if linear mode
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void *plinearmem; // linear address of start of frame buffer
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qboolean vga_incompatible;
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} vesa_extra_t;
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static vmode_t vesa_modes[MAX_VESA_MODES] =
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{{NULL, NULL, " ********* VESA modes ********* "}};
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static vesa_extra_t vesa_extra[MAX_VESA_MODES];
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static char names[MAX_VESA_MODES][10];
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extern regs_t regs;
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static int VID_currentpage;
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static int VID_displayedpage;
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static int *VID_pagelist;
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static byte *VID_membase;
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static int VID_banked;
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typedef struct
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{
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int modenum;
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int mode_attributes;
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int winasegment;
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int winbsegment;
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int bytes_per_scanline; // bytes per logical scanline (+16)
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int win; // window number (A=0, B=1)
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int win_size; // window size (+6)
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int granularity; // how finely i can set the window in vid mem (+4)
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int width, height; // displayed width and height (+18, +20)
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int bits_per_pixel; // er, better be 8, 15, 16, 24, or 32 (+25)
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int bytes_per_pixel; // er, better be 1, 2, or 4
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int memory_model; // and better be 4 or 6, packed or direct color (+27)
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int num_pages; // number of complete frame buffer pages (+29)
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int red_width; // the # of bits in the red component (+31)
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int red_pos; // the bit position of the red component (+32)
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int green_width; // etc.. (+33)
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int green_pos; // (+34)
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int blue_width; // (+35)
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int blue_pos; // (+36)
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int pptr;
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int pagesize;
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int numpages;
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} modeinfo_t;
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static modeinfo_t modeinfo;
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// all bytes to avoid problems with compiler field packing
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typedef struct vbeinfoblock_s {
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byte VbeSignature[4];
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byte VbeVersion[2];
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byte OemStringPtr[4];
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byte Capabilities[4];
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byte VideoModePtr[4];
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byte TotalMemory[2];
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byte OemSoftwareRev[2];
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byte OemVendorNamePtr[4];
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byte OemProductNamePtr[4];
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byte OemProductRevPtr[4];
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byte Reserved[222];
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byte OemData[256];
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} vbeinfoblock_t;
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static int totalvidmem;
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static byte *ppal;
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qboolean vsync_exists, de_exists;
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qboolean VID_ExtraGetModeInfo(int modenum);
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int VID_ExtraInitMode (viddef_t *vid, vmode_t *pcurrentmode);
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void VID_ExtraSwapBuffers (viddef_t *vid, vmode_t *pcurrentmode,
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vrect_t *rects);
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/*
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================
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VGA_BankedBeginDirectRect
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================
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*/
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void VGA_BankedBeginDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode,
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int x, int y, byte *pbitmap, int width, int height)
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{
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if (!lvid->direct)
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return;
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regs.x.ax = 0x4f05;
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regs.x.bx = 0;
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regs.x.dx = VID_displayedpage;
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dos_int86(0x10);
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VGA_BeginDirectRect (lvid, pcurrentmode, x, y, pbitmap, width, height);
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regs.x.ax = 0x4f05;
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regs.x.bx = 0;
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regs.x.dx = VID_currentpage;
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dos_int86(0x10);
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}
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/*
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================
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VGA_BankedEndDirectRect
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================
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*/
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void VGA_BankedEndDirectRect (viddef_t *lvid, struct vmode_s *pcurrentmode,
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int x, int y, int width, int height)
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{
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if (!lvid->direct)
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return;
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regs.x.ax = 0x4f05;
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regs.x.bx = 0;
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regs.x.dx = VID_displayedpage;
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dos_int86(0x10);
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VGA_EndDirectRect (lvid, pcurrentmode, x, y, width, height);
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regs.x.ax = 0x4f05;
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regs.x.bx = 0;
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regs.x.dx = VID_currentpage;
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dos_int86(0x10);
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}
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/*
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================
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VID_SetVESAPalette
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================
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*/
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void VID_SetVESAPalette (viddef_t *lvid, vmode_t *pcurrentmode,
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unsigned char *pal)
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{
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int i;
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byte *pp;
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UNUSED(lvid);
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UNUSED(pcurrentmode);
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pp = ppal;
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for (i=0 ; i<256 ; i++)
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{
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pp[2] = pal[0] >> 2;
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pp[1] = pal[1] >> 2;
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pp[0] = pal[2] >> 2;
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pp += 4;
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pal += 3;
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}
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regs.x.ax = 0x4F09;
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regs.x.bx = 0;
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regs.x.cx = 256;
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regs.x.dx = 0;
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regs.x.es = ptr2real(ppal) >> 4;
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regs.x.di = ptr2real(ppal) & 0xf;
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dos_int86(0x10);
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if (regs.x.ax != 0x4f)
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Sys_Error ("Unable to load VESA palette\n");
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}
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/*
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================
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VID_ExtraFarToLinear
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================
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*/
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void *VID_ExtraFarToLinear (void *ptr)
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{
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int temp;
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temp = (int)ptr;
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return real2ptr(((temp & 0xFFFF0000) >> 12) + (temp & 0xFFFF));
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}
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/*
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================
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VID_ExtraWaitDisplayEnable
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================
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*/
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void VID_ExtraWaitDisplayEnable ()
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{
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while ((inportb (0x3DA) & 0x01) == 1)
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;
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}
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/*
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================
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VID_ExtraVidLookForState
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================
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*/
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qboolean VID_ExtraVidLookForState (unsigned state, unsigned mask)
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{
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int i;
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double starttime, time;
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starttime = Sys_FloatTime ();
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do
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{
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for (i=0 ; i<100000 ; i++)
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{
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if ((inportb (0x3DA) & mask) == state)
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return true;
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}
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time = Sys_FloatTime ();
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} while ((time - starttime) < 0.1);
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return false;
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}
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/*
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================
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VID_ExtraStateFound
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================
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*/
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qboolean VID_ExtraStateFound (unsigned state)
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{
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int i, workingstate;
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workingstate = 0;
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for (i=0 ; i<10 ; i++)
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{
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if (!VID_ExtraVidLookForState(workingstate, state))
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{
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return false;
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}
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workingstate ^= state;
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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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VID_InitExtra
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================
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*/
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void VID_InitExtra (void)
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{
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int nummodes;
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short *pmodenums;
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vbeinfoblock_t *pinfoblock;
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__dpmi_meminfo phys_mem_info;
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pinfoblock = dos_getmemory(sizeof(vbeinfoblock_t));
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*(long *)pinfoblock->VbeSignature = 'V' + ('B'<<8) + ('E'<<16) + ('2'<<24);
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// see if VESA support is available
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regs.x.ax = 0x4f00;
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regs.x.es = ptr2real(pinfoblock) >> 4;
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regs.x.di = ptr2real(pinfoblock) & 0xf;
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dos_int86(0x10);
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if (regs.x.ax != 0x4f)
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return; // no VESA support
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if (pinfoblock->VbeVersion[1] < 0x02)
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return; // not VESA 2.0 or greater
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Con_Printf ("VESA 2.0 compliant adapter:\n%s\n",
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VID_ExtraFarToLinear (*(byte **)&pinfoblock->OemStringPtr[0]));
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totalvidmem = *(unsigned short *)&pinfoblock->TotalMemory[0] << 16;
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pmodenums = (short *)
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VID_ExtraFarToLinear (*(byte **)&pinfoblock->VideoModePtr[0]);
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// find 8 bit modes until we either run out of space or run out of modes
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nummodes = 0;
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while ((*pmodenums != -1) && (nummodes < MAX_VESA_MODES))
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{
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if (VID_ExtraGetModeInfo (*pmodenums))
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{
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vesa_modes[nummodes].pnext = &vesa_modes[nummodes+1];
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if (modeinfo.width > 999)
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{
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if (modeinfo.height > 999)
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{
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sprintf (&names[nummodes][0], "%4dx%4d", modeinfo.width,
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modeinfo.height);
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names[nummodes][9] = 0;
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}
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else
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{
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sprintf (&names[nummodes][0], "%4dx%3d", modeinfo.width,
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modeinfo.height);
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names[nummodes][8] = 0;
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}
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}
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else
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{
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if (modeinfo.height > 999)
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{
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sprintf (&names[nummodes][0], "%3dx%4d", modeinfo.width,
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modeinfo.height);
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names[nummodes][8] = 0;
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}
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else
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{
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sprintf (&names[nummodes][0], "%3dx%3d", modeinfo.width,
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modeinfo.height);
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names[nummodes][7] = 0;
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}
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}
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vesa_modes[nummodes].name = &names[nummodes][0];
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vesa_modes[nummodes].width = modeinfo.width;
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vesa_modes[nummodes].height = modeinfo.height;
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vesa_modes[nummodes].aspect =
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((float)modeinfo.height / (float)modeinfo.width) *
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(320.0 / 240.0);
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vesa_modes[nummodes].rowbytes = modeinfo.bytes_per_scanline;
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vesa_modes[nummodes].planar = 0;
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vesa_modes[nummodes].pextradata = &vesa_extra[nummodes];
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vesa_modes[nummodes].setmode = VID_ExtraInitMode;
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vesa_modes[nummodes].swapbuffers = VID_ExtraSwapBuffers;
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vesa_modes[nummodes].setpalette = VID_SetVESAPalette;
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if (modeinfo.mode_attributes & LINEAR_FRAME_BUFFER)
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{
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// add linear bit to mode for linear modes
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vesa_extra[nummodes].vesamode = modeinfo.modenum | LINEAR_MODE;
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vesa_extra[nummodes].pages[0] = 0;
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vesa_extra[nummodes].pages[1] = modeinfo.pagesize;
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vesa_extra[nummodes].pages[2] = modeinfo.pagesize * 2;
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vesa_modes[nummodes].numpages = modeinfo.numpages;
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vesa_modes[nummodes].begindirectrect = VGA_BeginDirectRect;
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vesa_modes[nummodes].enddirectrect = VGA_EndDirectRect;
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phys_mem_info.address = (int)modeinfo.pptr;
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phys_mem_info.size = 0x400000;
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if (__dpmi_physical_address_mapping(&phys_mem_info))
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goto NextMode;
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vesa_extra[nummodes].plinearmem =
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real2ptr (phys_mem_info.address);
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}
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else
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{
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// banked at 0xA0000
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vesa_extra[nummodes].vesamode = modeinfo.modenum;
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vesa_extra[nummodes].pages[0] = 0;
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vesa_extra[nummodes].plinearmem =
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real2ptr(modeinfo.winasegment<<4);
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vesa_modes[nummodes].begindirectrect =
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VGA_BankedBeginDirectRect;
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vesa_modes[nummodes].enddirectrect = VGA_BankedEndDirectRect;
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vesa_extra[nummodes].pages[1] = modeinfo.pagesize;
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vesa_extra[nummodes].pages[2] = modeinfo.pagesize * 2;
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vesa_modes[nummodes].numpages = modeinfo.numpages;
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}
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vesa_extra[nummodes].vga_incompatible =
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modeinfo.mode_attributes & VGA_INCOMPATIBLE;
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nummodes++;
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}
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NextMode:
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pmodenums++;
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}
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// add the VESA modes at the start of the mode list (if there are any)
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if (nummodes)
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{
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vesa_modes[nummodes-1].pnext = pvidmodes;
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pvidmodes = &vesa_modes[0];
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numvidmodes += nummodes;
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ppal = dos_getmemory(256*4);
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}
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dos_freememory(pinfoblock);
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}
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/*
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================
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VID_ExtraGetModeInfo
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================
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*/
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qboolean VID_ExtraGetModeInfo(int modenum)
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{
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char *infobuf;
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int numimagepages;
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infobuf = dos_getmemory(256);
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regs.x.ax = 0x4f01;
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regs.x.cx = modenum;
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regs.x.es = ptr2real(infobuf) >> 4;
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regs.x.di = ptr2real(infobuf) & 0xf;
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dos_int86(0x10);
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if (regs.x.ax != 0x4f)
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{
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return false;
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}
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else
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{
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modeinfo.modenum = modenum;
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modeinfo.bits_per_pixel = *(char*)(infobuf+25);
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modeinfo.bytes_per_pixel = (modeinfo.bits_per_pixel+1)/8;
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modeinfo.width = *(short*)(infobuf+18);
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modeinfo.height = *(short*)(infobuf+20);
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// we do only 8-bpp in software
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if ((modeinfo.bits_per_pixel != 8) ||
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(modeinfo.bytes_per_pixel != 1) ||
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(modeinfo.width > MAXWIDTH) ||
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(modeinfo.height > MAXHEIGHT))
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{
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return false;
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}
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modeinfo.mode_attributes = *(short*)infobuf;
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// we only want color graphics modes that are supported by the hardware
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if ((modeinfo.mode_attributes &
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(MODE_SUPPORTED_IN_HW | COLOR_MODE | GRAPHICS_MODE)) !=
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(MODE_SUPPORTED_IN_HW | COLOR_MODE | GRAPHICS_MODE))
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{
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return false;
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}
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// we only work with linear frame buffers, except for 320x200, which can
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// effectively be linear when banked at 0xA000
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if (!(modeinfo.mode_attributes & LINEAR_FRAME_BUFFER))
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{
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if ((modeinfo.width != 320) || (modeinfo.height != 200))
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return false;
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}
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modeinfo.bytes_per_scanline = *(short*)(infobuf+16);
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modeinfo.pagesize = modeinfo.bytes_per_scanline * modeinfo.height;
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if (modeinfo.pagesize > totalvidmem)
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return false;
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// force to one page if the adapter reports it doesn't support more pages
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// than that, no matter how much memory it has--it may not have hardware
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// support for page flipping
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numimagepages = *(unsigned char *)(infobuf+29);
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if (numimagepages <= 0)
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{
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// wrong, but there seems to be an ATI VESA driver that reports 0
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modeinfo.numpages = 1;
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}
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else if (numimagepages < 3)
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{
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modeinfo.numpages = numimagepages;
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}
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else
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{
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modeinfo.numpages = 3;
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}
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if (*(char*)(infobuf+2) & 5)
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{
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modeinfo.winasegment = *(unsigned short*)(infobuf+8);
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modeinfo.win = 0;
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}
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else if (*(char*)(infobuf+3) & 5)
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{
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modeinfo.winbsegment = *(unsigned short*)(infobuf+8);
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modeinfo.win = 1;
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}
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modeinfo.granularity = *(short*)(infobuf+4) * 1024;
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modeinfo.win_size = *(short*)(infobuf+6) * 1024;
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modeinfo.bits_per_pixel = *(char*)(infobuf+25);
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modeinfo.bytes_per_pixel = (modeinfo.bits_per_pixel+1)/8;
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modeinfo.memory_model = *(unsigned char*)(infobuf+27);
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modeinfo.num_pages = *(char*)(infobuf+29) + 1;
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|
|
|
modeinfo.red_width = *(char*)(infobuf+31);
|
|
modeinfo.red_pos = *(char*)(infobuf+32);
|
|
modeinfo.green_width = *(char*)(infobuf+33);
|
|
modeinfo.green_pos = *(char*)(infobuf+34);
|
|
modeinfo.blue_width = *(char*)(infobuf+35);
|
|
modeinfo.blue_pos = *(char*)(infobuf+36);
|
|
|
|
modeinfo.pptr = *(long *)(infobuf+40);
|
|
|
|
#if 0
|
|
printf("VID: (VESA) info for mode 0x%x\n", modeinfo.modenum);
|
|
printf(" mode attrib = 0x%0x\n", modeinfo.mode_attributes);
|
|
printf(" win a attrib = 0x%0x\n", *(unsigned char*)(infobuf+2));
|
|
printf(" win b attrib = 0x%0x\n", *(unsigned char*)(infobuf+3));
|
|
printf(" win a seg 0x%0x\n", (int) modeinfo.winasegment);
|
|
printf(" win b seg 0x%0x\n", (int) modeinfo.winbsegment);
|
|
printf(" bytes per scanline = %d\n",
|
|
modeinfo.bytes_per_scanline);
|
|
printf(" width = %d, height = %d\n", modeinfo.width,
|
|
modeinfo.height);
|
|
printf(" win = %c\n", 'A' + modeinfo.win);
|
|
printf(" win granularity = %d\n", modeinfo.granularity);
|
|
printf(" win size = %d\n", modeinfo.win_size);
|
|
printf(" bits per pixel = %d\n", modeinfo.bits_per_pixel);
|
|
printf(" bytes per pixel = %d\n", modeinfo.bytes_per_pixel);
|
|
printf(" memory model = 0x%x\n", modeinfo.memory_model);
|
|
printf(" num pages = %d\n", modeinfo.num_pages);
|
|
printf(" red width = %d\n", modeinfo.red_width);
|
|
printf(" red pos = %d\n", modeinfo.red_pos);
|
|
printf(" green width = %d\n", modeinfo.green_width);
|
|
printf(" green pos = %d\n", modeinfo.green_pos);
|
|
printf(" blue width = %d\n", modeinfo.blue_width);
|
|
printf(" blue pos = %d\n", modeinfo.blue_pos);
|
|
printf(" phys mem = %x\n", modeinfo.pptr);
|
|
#endif
|
|
}
|
|
|
|
dos_freememory(infobuf);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
VID_ExtraInitMode
|
|
================
|
|
*/
|
|
int VID_ExtraInitMode (viddef_t *lvid, vmode_t *pcurrentmode)
|
|
{
|
|
vesa_extra_t *pextra;
|
|
int pageoffset;
|
|
|
|
pextra = pcurrentmode->pextradata;
|
|
|
|
if (vid_nopageflip.value)
|
|
lvid->numpages = 1;
|
|
else
|
|
lvid->numpages = pcurrentmode->numpages;
|
|
|
|
// clean up any old vid buffer lying around, alloc new if needed
|
|
if (!VGA_FreeAndAllocVidbuffer (lvid, lvid->numpages == 1))
|
|
return -1; // memory alloc failed
|
|
|
|
// clear the screen and wait for the next frame. VGA_pcurmode, which
|
|
// VGA_ClearVideoMem relies on, is guaranteed to be set because mode 0 is
|
|
// always the first mode set in a session
|
|
if (VGA_pcurmode)
|
|
VGA_ClearVideoMem (VGA_pcurmode->planar);
|
|
|
|
// set the mode
|
|
regs.x.ax = 0x4f02;
|
|
regs.x.bx = pextra->vesamode;
|
|
dos_int86(0x10);
|
|
|
|
if (regs.x.ax != 0x4f)
|
|
return 0;
|
|
|
|
VID_banked = !(pextra->vesamode & LINEAR_MODE);
|
|
VID_membase = pextra->plinearmem;
|
|
VGA_width = lvid->width;
|
|
VGA_height = lvid->height;
|
|
VGA_rowbytes = lvid->rowbytes;
|
|
|
|
lvid->colormap = host_colormap;
|
|
|
|
VID_pagelist = &pextra->pages[0];
|
|
|
|
// wait for display enable by default only when triple-buffering on a VGA-
|
|
// compatible machine that actually has a functioning display enable status
|
|
vsync_exists = VID_ExtraStateFound (0x08);
|
|
de_exists = VID_ExtraStateFound (0x01);
|
|
|
|
if (!pextra->vga_incompatible &&
|
|
(lvid->numpages == 3) &&
|
|
de_exists &&
|
|
(_vid_wait_override.value == 0.0))
|
|
{
|
|
Cvar_SetValue ("vid_wait", (float)VID_WAIT_DISPLAY_ENABLE);
|
|
|
|
VID_displayedpage = 0;
|
|
VID_currentpage = 1;
|
|
}
|
|
else
|
|
{
|
|
if ((lvid->numpages == 1) && (_vid_wait_override.value == 0.0))
|
|
{
|
|
Cvar_SetValue ("vid_wait", (float)VID_WAIT_NONE);
|
|
VID_displayedpage = VID_currentpage = 0;
|
|
}
|
|
else
|
|
{
|
|
Cvar_SetValue ("vid_wait", (float)VID_WAIT_VSYNC);
|
|
|
|
VID_displayedpage = 0;
|
|
|
|
if (lvid->numpages > 1)
|
|
VID_currentpage = 1;
|
|
else
|
|
VID_currentpage = 0;
|
|
}
|
|
}
|
|
|
|
// TODO: really should be a call to a function
|
|
pageoffset = VID_pagelist[VID_displayedpage];
|
|
|
|
regs.x.ax = 0x4f07;
|
|
regs.x.bx = 0x80; // wait for vsync so we know page 0 is visible
|
|
regs.x.cx = pageoffset % VGA_rowbytes;
|
|
regs.x.dx = pageoffset / VGA_rowbytes;
|
|
dos_int86(0x10);
|
|
|
|
if (VID_banked)
|
|
{
|
|
regs.x.ax = 0x4f05;
|
|
regs.x.bx = 0;
|
|
regs.x.dx = VID_currentpage;
|
|
dos_int86(0x10);
|
|
|
|
VGA_pagebase = VID_membase;
|
|
}
|
|
else
|
|
{
|
|
VGA_pagebase = VID_membase + VID_pagelist[VID_currentpage];
|
|
}
|
|
|
|
if (lvid->numpages > 1)
|
|
{
|
|
lvid->buffer = VGA_pagebase;
|
|
lvid->conbuffer = lvid->buffer;
|
|
}
|
|
else
|
|
{
|
|
lvid->rowbytes = lvid->width;
|
|
}
|
|
|
|
lvid->direct = VGA_pagebase;
|
|
lvid->conrowbytes = lvid->rowbytes;
|
|
lvid->conwidth = lvid->width;
|
|
lvid->conheight = lvid->height;
|
|
|
|
lvid->maxwarpwidth = WARP_WIDTH;
|
|
lvid->maxwarpheight = WARP_HEIGHT;
|
|
|
|
VGA_pcurmode = pcurrentmode;
|
|
|
|
D_InitCaches (vid_surfcache, vid_surfcachesize);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
VID_ExtraSwapBuffers
|
|
================
|
|
*/
|
|
void VID_ExtraSwapBuffers (viddef_t *lvid, vmode_t *pcurrentmode,
|
|
vrect_t *rects)
|
|
{
|
|
int pageoffset;
|
|
|
|
UNUSED(rects);
|
|
UNUSED(pcurrentmode);
|
|
|
|
pageoffset = VID_pagelist[VID_currentpage];
|
|
|
|
// display the newly finished page
|
|
if (lvid->numpages > 1)
|
|
{
|
|
// page flipped
|
|
regs.x.ax = 0x4f07;
|
|
|
|
if (vid_wait.value != VID_WAIT_VSYNC)
|
|
{
|
|
if ((vid_wait.value == VID_WAIT_DISPLAY_ENABLE) && de_exists)
|
|
VID_ExtraWaitDisplayEnable ();
|
|
|
|
regs.x.bx = VESA_DONT_WAIT_VSYNC;
|
|
}
|
|
else
|
|
{
|
|
regs.x.bx = VESA_WAIT_VSYNC; // double buffered has to wait
|
|
}
|
|
|
|
regs.x.cx = pageoffset % VGA_rowbytes;
|
|
regs.x.dx = pageoffset / VGA_rowbytes;
|
|
dos_int86(0x10);
|
|
|
|
VID_displayedpage = VID_currentpage;
|
|
if (++VID_currentpage >= lvid->numpages)
|
|
VID_currentpage = 0;
|
|
|
|
//
|
|
// set the new write window if this is a banked mode; otherwise, set the
|
|
// new address to which to write
|
|
//
|
|
if (VID_banked)
|
|
{
|
|
regs.x.ax = 0x4f05;
|
|
regs.x.bx = 0;
|
|
regs.x.dx = VID_currentpage;
|
|
dos_int86(0x10);
|
|
}
|
|
else
|
|
{
|
|
lvid->direct = lvid->buffer; // direct drawing goes to the
|
|
// currently displayed page
|
|
lvid->buffer = VID_membase + VID_pagelist[VID_currentpage];
|
|
lvid->conbuffer = lvid->buffer;
|
|
}
|
|
|
|
VGA_pagebase = lvid->buffer;
|
|
}
|
|
else
|
|
{
|
|
// non-page-flipped
|
|
if (vsync_exists && (vid_wait.value == VID_WAIT_VSYNC))
|
|
{
|
|
VGA_WaitVsync ();
|
|
}
|
|
|
|
while (rects)
|
|
{
|
|
VGA_UpdateLinearScreen (
|
|
lvid->buffer + rects->x + (rects->y * lvid->rowbytes),
|
|
VGA_pagebase + rects->x + (rects->y * VGA_rowbytes),
|
|
rects->width,
|
|
rects->height,
|
|
lvid->rowbytes,
|
|
VGA_rowbytes);
|
|
|
|
rects = rects->pnext;
|
|
}
|
|
}
|
|
}
|
|
|