msdos/vga.c

   1 /*
   2  * VGA hardware emulation
   3  *
   4  * Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
   5  *
   6  */
   7
   8 #include <string.h>
   9 #include "winbase.h"
  10 #include "wincon.h"
  11 #include "miscemu.h"
  12 #include "vga.h"
  13 #include "ddraw.h"
  14 #include "services.h"
  15 #include "debugtools.h"
  16
  17 DEFAULT_DEBUG_CHANNEL(ddraw);
  18
  19 static IDirectDraw *lpddraw = NULL;
  20 static IDirectDrawSurface *lpddsurf;
  21 static IDirectDrawPalette *lpddpal;
  22 static DDSURFACEDESC sdesc;
  23 static LONG vga_polling,vga_refresh;
  24 static HANDLE poll_timer;
  25
  26 static HRESULT WINAPI (*pDirectDrawCreate)(LPGUID,LPDIRECTDRAW *,LPUNKNOWN);
  27
  28 static void VGA_DeinstallTimer(void)
  29 {
  30     if (poll_timer) {
  31         SERVICE_Delete( poll_timer );
  32         poll_timer = 0;
  33     }
  34 }
  35
  36 static void VGA_InstallTimer(unsigned Rate)
  37 {
  38     VGA_DeinstallTimer();
  39     if (!poll_timer)
  40         poll_timer = SERVICE_AddTimer( Rate, VGA_Poll, 0 );
  41 }
  42
  43 HANDLE VGA_AlphaConsole(void)
  44 {
  45     /* this assumes that no Win32 redirection has taken place, but then again,
  46      * only 16-bit apps are likely to use this part of Wine... */
  47     return GetStdHandle(STD_OUTPUT_HANDLE);
  48 }
  49
  50 char*VGA_AlphaBuffer(void)
  51 {
  52     return DOSMEM_MapDosToLinear(0xb8000);
  53 }
  54
  55 /*** GRAPHICS MODE ***/
  56
  57 int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
  58 {
  59     if (lpddraw) VGA_Exit();
  60     if (!lpddraw) {
  61         if (!pDirectDrawCreate)
  62         {
  63             HMODULE hmod = LoadLibraryA( "ddraw.dll" );
  64             if (hmod) pDirectDrawCreate = GetProcAddress( hmod, "DirectDrawCreate" );
  65         }
  66         if (pDirectDrawCreate) pDirectDrawCreate(NULL,&lpddraw,NULL);
  67         if (!lpddraw) {
  68             ERR("DirectDraw is not available\n");
  69             return 1;
  70         }
  71         if (IDirectDraw_SetDisplayMode(lpddraw,Xres,Yres,Depth)) {
  72             ERR("DirectDraw does not support requested display mode\n");
  73             IDirectDraw_Release(lpddraw);
  74             lpddraw=NULL;
  75             return 1;
  76         }
  77         IDirectDraw_CreatePalette(lpddraw,DDPCAPS_8BIT,NULL,&lpddpal,NULL);
  78         memset(&sdesc,0,sizeof(sdesc));
  79         sdesc.dwSize=sizeof(sdesc);
  80         sdesc.dwFlags = DDSD_CAPS;
  81         sdesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
  82         if (IDirectDraw_CreateSurface(lpddraw,&sdesc,&lpddsurf,NULL)||(!lpddsurf)) {
  83             ERR("DirectDraw surface is not available\n");
  84             IDirectDraw_Release(lpddraw);
  85             lpddraw=NULL;
  86             return 1;
  87         }
  88         FIXME("no default palette entries\n");
  89         IDirectDrawSurface_SetPalette(lpddsurf,lpddpal);
  90         vga_refresh=0;
  91         /* poll every 20ms (50fps should provide adequate responsiveness) */
  92         VGA_InstallTimer(20);
  93     }
  94     return 0;
  95 }
  96
  97 int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth)
  98 {
  99     if (!lpddraw) return 1;
 100     if (!lpddsurf) return 1;
 101     if (Height) *Height=sdesc.dwHeight;
 102     if (Width) *Width=sdesc.dwWidth;
 103     if (Depth) *Depth=sdesc.ddpfPixelFormat.u.dwRGBBitCount;
 104     return 0;
 105 }
 106
 107 void VGA_Exit(void)
 108 {
 109     if (lpddraw) {
 110         VGA_DeinstallTimer();
 111         IDirectDrawSurface_SetPalette(lpddsurf,NULL);
 112         IDirectDrawSurface_Release(lpddsurf);
 113         lpddsurf=NULL;
 114         IDirectDrawPalette_Release(lpddpal);
 115         lpddpal=NULL;
 116         IDirectDraw_Release(lpddraw);
 117         lpddraw=NULL;
 118     }
 119 }
 120
 121 void VGA_SetPalette(PALETTEENTRY*pal,int start,int len)
 122 {
 123     if (!lpddraw) return;
 124     IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
 125 }
 126
 127 void VGA_SetQuadPalette(RGBQUAD*color,int start,int len)
 128 {
 129     PALETTEENTRY pal[256];
 130     int c;
 131
 132     if (!lpddraw) return;
 133     for (c=0; c<len; c++) {
 134         pal[c].peRed  =color[c].rgbRed;
 135         pal[c].peGreen=color[c].rgbGreen;
 136         pal[c].peBlue =color[c].rgbBlue;
 137         pal[c].peFlags=0;
 138     }
 139     IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
 140 }
 141
 142 LPSTR VGA_Lock(unsigned*Pitch,unsigned*Height,unsigned*Width,unsigned*Depth)
 143 {
 144     if (!lpddraw) return NULL;
 145     if (!lpddsurf) return NULL;
 146     if (IDirectDrawSurface_Lock(lpddsurf,NULL,&sdesc,0,0)) {
 147         ERR("could not lock surface!\n");
 148         return NULL;
 149     }
 150     if (Pitch) *Pitch=sdesc.lPitch;
 151     if (Height) *Height=sdesc.dwHeight;
 152     if (Width) *Width=sdesc.dwWidth;
 153     if (Depth) *Depth=sdesc.ddpfPixelFormat.u.dwRGBBitCount;
 154     return sdesc.u1.lpSurface;
 155 }
 156
 157 void VGA_Unlock(void)
 158 {
 159     IDirectDrawSurface_Unlock(lpddsurf,sdesc.u1.lpSurface);
 160 }
 161
 162 /*** TEXT MODE ***/
 163
 164 int VGA_SetAlphaMode(unsigned Xres,unsigned Yres)
 165 {
 166     COORD siz;
 167
 168     if (lpddraw) VGA_Exit();
 169
 170     /* the xterm is slow, so refresh only every 200ms (5fps) */
 171     VGA_InstallTimer(200);
 172
 173     siz.X = Xres;
 174     siz.Y = Yres;
 175     SetConsoleScreenBufferSize(VGA_AlphaConsole(),siz);
 176     return 0;
 177 }
 178
 179 void VGA_GetAlphaMode(unsigned*Xres,unsigned*Yres)
 180 {
 181     CONSOLE_SCREEN_BUFFER_INFO info;
 182     GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
 183     if (Xres) *Xres=info.dwSize.X;
 184     if (Yres) *Yres=info.dwSize.Y;
 185 }
 186
 187 void VGA_SetCursorPos(unsigned X,unsigned Y)
 188 {
 189     COORD pos;
 190
 191     pos.X = X;
 192     pos.Y = Y;
 193     SetConsoleCursorPosition(VGA_AlphaConsole(),pos);
 194 }
 195
 196 void VGA_GetCursorPos(unsigned*X,unsigned*Y)
 197 {
 198     CONSOLE_SCREEN_BUFFER_INFO info;
 199     GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
 200     if (X) *X=info.dwCursorPosition.X;
 201     if (Y) *Y=info.dwCursorPosition.Y;
 202 }
 203
 204 void VGA_WriteChars(unsigned X,unsigned Y,unsigned ch,int attr,int count)
 205 {
 206     unsigned XR, YR;
 207     char*dat;
 208
 209     VGA_GetAlphaMode(&XR, &YR);
 210     dat = VGA_AlphaBuffer() + ((XR*Y + X) * 2);
 211     /* FIXME: also call WriteConsoleOutputA, for better responsiveness */
 212     while (count--) {
 213         *dat++ = ch;
 214         if (attr>=0) *dat = attr;
 215         dat++;
 216     }
 217 }
 218
 219 /*** CONTROL ***/
 220
 221 void CALLBACK VGA_Poll( ULONG_PTR arg )
 222 {
 223     char *dat;
 224     unsigned int Pitch,Height,Width,Y,X;
 225     char *surf;
 226
 227     if (!InterlockedExchangeAdd(&vga_polling, 1)) {
 228         /* FIXME: optimize by doing this only if the data has actually changed
 229          *        (in a way similar to DIBSection, perhaps) */
 230         if (lpddraw) {
 231           /* graphics mode */
 232           surf = VGA_Lock(&Pitch,&Height,&Width,NULL);
 233           if (!surf) return;
 234           dat = DOSMEM_MapDosToLinear(0xa0000);
 235           /* copy from virtual VGA frame buffer to DirectDraw surface */
 236           for (Y=0; Y<Height; Y++,surf+=Pitch,dat+=Width) {
 237               memcpy(surf,dat,Width);
 238               /*for (X=0; X<Width; X++) if (dat[X]) TRACE(ddraw,"data(%d) at (%d,%d)\n",dat[X],X,Y);*/
 239           }
 240           VGA_Unlock();
 241         } else {
 242           /* text mode */
 243           CHAR_INFO ch[80];
 244           COORD siz, off;
 245           SMALL_RECT dest;
 246           HANDLE con = VGA_AlphaConsole();
 247
 248           VGA_GetAlphaMode(&Width,&Height);
 249           dat = VGA_AlphaBuffer();
 250           siz.X = 80; siz.Y = 1;
 251           off.X = 0; off.Y = 0;
 252           /* copy from virtual VGA frame buffer to console */
 253           for (Y=0; Y<Height; Y++) {
 254               dest.Top=Y; dest.Bottom=Y;
 255               for (X=0; X<Width; X++) {
 256                   ch[X].Char.AsciiChar = *dat++;
 257                   /* WriteConsoleOutputA doesn't like "dead" chars */
 258                   if (ch[X].Char.AsciiChar == '\0')
 259                       ch[X].Char.AsciiChar = ' ';
 260                   ch[X].Attributes = *dat++;
 261               }
 262               dest.Left=0; dest.Right=Width+1;
 263               WriteConsoleOutputA(con, ch, siz, off, &dest);
 264           }
 265         }
 266         vga_refresh=1;
 267     }
 268     InterlockedDecrement(&vga_polling);
 269 }
 270
 271 static BYTE palreg,palcnt;
 272 static PALETTEENTRY paldat;
 273
 274 void VGA_ioport_out( WORD port, BYTE val )
 275 {
 276     switch (port) {
 277         case 0x3c8:
 278             palreg=val; palcnt=0; break;
 279         case 0x3c9:
 280             ((BYTE*)&paldat)[palcnt++]=val << 2;
 281             if (palcnt==3) {
 282                 VGA_SetPalette(&paldat,palreg++,1);
 283                 palcnt=0;
 284             }
 285             break;
 286     }
 287 }
 288
 289 BYTE VGA_ioport_in( WORD port )
 290 {
 291     BYTE ret;
 292
 293     switch (port) {
 294         case 0x3da:
 295             /* since we don't (yet?) serve DOS VM requests while VGA_Poll is running,
 296                we need to fake the occurrence of the vertical refresh */
 297             ret=vga_refresh?0x00:0x08;
 298             vga_refresh=0;
 299             break;
 300         default:
 301             ret=0xff;
 302     }
 303     return ret;
 304 }
 305
 306 void VGA_Clean(void)
 307 {
 308     VGA_Exit();
 309     VGA_DeinstallTimer();
 310 }