311 lines
8.0 KiB
C
311 lines
8.0 KiB
C
/*
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* VGA hardware emulation
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*
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* Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
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*
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*/
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#include <string.h>
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#include "winbase.h"
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#include "wincon.h"
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#include "miscemu.h"
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#include "vga.h"
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#include "ddraw.h"
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#include "services.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(ddraw);
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static IDirectDraw *lpddraw = NULL;
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static IDirectDrawSurface *lpddsurf;
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static IDirectDrawPalette *lpddpal;
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static DDSURFACEDESC sdesc;
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static LONG vga_polling,vga_refresh;
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static HANDLE poll_timer;
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static HRESULT WINAPI (*pDirectDrawCreate)(LPGUID,LPDIRECTDRAW *,LPUNKNOWN);
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static void VGA_DeinstallTimer(void)
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{
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if (poll_timer) {
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SERVICE_Delete( poll_timer );
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poll_timer = 0;
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}
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}
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static void VGA_InstallTimer(unsigned Rate)
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{
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VGA_DeinstallTimer();
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if (!poll_timer)
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poll_timer = SERVICE_AddTimer( Rate, VGA_Poll, 0 );
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}
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HANDLE VGA_AlphaConsole(void)
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{
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/* this assumes that no Win32 redirection has taken place, but then again,
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* only 16-bit apps are likely to use this part of Wine... */
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return GetStdHandle(STD_OUTPUT_HANDLE);
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}
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char*VGA_AlphaBuffer(void)
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{
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return DOSMEM_MapDosToLinear(0xb8000);
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}
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/*** GRAPHICS MODE ***/
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int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
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{
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if (lpddraw) VGA_Exit();
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if (!lpddraw) {
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if (!pDirectDrawCreate)
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{
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HMODULE hmod = LoadLibraryA( "ddraw.dll" );
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if (hmod) pDirectDrawCreate = GetProcAddress( hmod, "DirectDrawCreate" );
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}
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if (pDirectDrawCreate) pDirectDrawCreate(NULL,&lpddraw,NULL);
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if (!lpddraw) {
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ERR("DirectDraw is not available\n");
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return 1;
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}
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if (IDirectDraw_SetDisplayMode(lpddraw,Xres,Yres,Depth)) {
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ERR("DirectDraw does not support requested display mode\n");
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IDirectDraw_Release(lpddraw);
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lpddraw=NULL;
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return 1;
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}
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IDirectDraw_CreatePalette(lpddraw,DDPCAPS_8BIT,NULL,&lpddpal,NULL);
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memset(&sdesc,0,sizeof(sdesc));
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sdesc.dwSize=sizeof(sdesc);
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sdesc.dwFlags = DDSD_CAPS;
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sdesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
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if (IDirectDraw_CreateSurface(lpddraw,&sdesc,&lpddsurf,NULL)||(!lpddsurf)) {
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ERR("DirectDraw surface is not available\n");
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IDirectDraw_Release(lpddraw);
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lpddraw=NULL;
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return 1;
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}
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FIXME("no default palette entries\n");
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IDirectDrawSurface_SetPalette(lpddsurf,lpddpal);
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vga_refresh=0;
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/* poll every 20ms (50fps should provide adequate responsiveness) */
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VGA_InstallTimer(20);
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}
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return 0;
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}
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int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth)
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{
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if (!lpddraw) return 1;
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if (!lpddsurf) return 1;
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if (Height) *Height=sdesc.dwHeight;
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if (Width) *Width=sdesc.dwWidth;
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if (Depth) *Depth=sdesc.ddpfPixelFormat.u.dwRGBBitCount;
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return 0;
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}
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void VGA_Exit(void)
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{
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if (lpddraw) {
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VGA_DeinstallTimer();
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IDirectDrawSurface_SetPalette(lpddsurf,NULL);
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IDirectDrawSurface_Release(lpddsurf);
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lpddsurf=NULL;
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IDirectDrawPalette_Release(lpddpal);
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lpddpal=NULL;
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IDirectDraw_Release(lpddraw);
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lpddraw=NULL;
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}
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}
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void VGA_SetPalette(PALETTEENTRY*pal,int start,int len)
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{
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if (!lpddraw) return;
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IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
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}
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void VGA_SetQuadPalette(RGBQUAD*color,int start,int len)
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{
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PALETTEENTRY pal[256];
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int c;
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if (!lpddraw) return;
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for (c=0; c<len; c++) {
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pal[c].peRed =color[c].rgbRed;
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pal[c].peGreen=color[c].rgbGreen;
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pal[c].peBlue =color[c].rgbBlue;
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pal[c].peFlags=0;
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}
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IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
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}
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LPSTR VGA_Lock(unsigned*Pitch,unsigned*Height,unsigned*Width,unsigned*Depth)
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{
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if (!lpddraw) return NULL;
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if (!lpddsurf) return NULL;
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if (IDirectDrawSurface_Lock(lpddsurf,NULL,&sdesc,0,0)) {
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ERR("could not lock surface!\n");
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return NULL;
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}
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if (Pitch) *Pitch=sdesc.lPitch;
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if (Height) *Height=sdesc.dwHeight;
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if (Width) *Width=sdesc.dwWidth;
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if (Depth) *Depth=sdesc.ddpfPixelFormat.u.dwRGBBitCount;
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return sdesc.u1.lpSurface;
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}
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void VGA_Unlock(void)
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{
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IDirectDrawSurface_Unlock(lpddsurf,sdesc.u1.lpSurface);
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}
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/*** TEXT MODE ***/
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int VGA_SetAlphaMode(unsigned Xres,unsigned Yres)
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{
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COORD siz;
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if (lpddraw) VGA_Exit();
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/* the xterm is slow, so refresh only every 200ms (5fps) */
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VGA_InstallTimer(200);
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siz.X = Xres;
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siz.Y = Yres;
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SetConsoleScreenBufferSize(VGA_AlphaConsole(),siz);
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return 0;
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}
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void VGA_GetAlphaMode(unsigned*Xres,unsigned*Yres)
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{
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CONSOLE_SCREEN_BUFFER_INFO info;
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GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
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if (Xres) *Xres=info.dwSize.X;
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if (Yres) *Yres=info.dwSize.Y;
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}
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void VGA_SetCursorPos(unsigned X,unsigned Y)
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{
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COORD pos;
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pos.X = X;
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pos.Y = Y;
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SetConsoleCursorPosition(VGA_AlphaConsole(),pos);
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}
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void VGA_GetCursorPos(unsigned*X,unsigned*Y)
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{
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CONSOLE_SCREEN_BUFFER_INFO info;
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GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
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if (X) *X=info.dwCursorPosition.X;
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if (Y) *Y=info.dwCursorPosition.Y;
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}
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void VGA_WriteChars(unsigned X,unsigned Y,unsigned ch,int attr,int count)
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{
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unsigned XR, YR;
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char*dat;
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VGA_GetAlphaMode(&XR, &YR);
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dat = VGA_AlphaBuffer() + ((XR*Y + X) * 2);
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/* FIXME: also call WriteConsoleOutputA, for better responsiveness */
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while (count--) {
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*dat++ = ch;
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if (attr>=0) *dat = attr;
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dat++;
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}
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}
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/*** CONTROL ***/
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void CALLBACK VGA_Poll( ULONG_PTR arg )
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{
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char *dat;
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unsigned int Pitch,Height,Width,Y,X;
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char *surf;
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if (!InterlockedExchangeAdd(&vga_polling, 1)) {
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/* FIXME: optimize by doing this only if the data has actually changed
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* (in a way similar to DIBSection, perhaps) */
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if (lpddraw) {
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/* graphics mode */
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surf = VGA_Lock(&Pitch,&Height,&Width,NULL);
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if (!surf) return;
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dat = DOSMEM_MapDosToLinear(0xa0000);
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/* copy from virtual VGA frame buffer to DirectDraw surface */
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for (Y=0; Y<Height; Y++,surf+=Pitch,dat+=Width) {
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memcpy(surf,dat,Width);
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/*for (X=0; X<Width; X++) if (dat[X]) TRACE(ddraw,"data(%d) at (%d,%d)\n",dat[X],X,Y);*/
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}
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VGA_Unlock();
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} else {
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/* text mode */
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CHAR_INFO ch[80];
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COORD siz, off;
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SMALL_RECT dest;
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HANDLE con = VGA_AlphaConsole();
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VGA_GetAlphaMode(&Width,&Height);
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dat = VGA_AlphaBuffer();
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siz.X = 80; siz.Y = 1;
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off.X = 0; off.Y = 0;
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/* copy from virtual VGA frame buffer to console */
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for (Y=0; Y<Height; Y++) {
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dest.Top=Y; dest.Bottom=Y;
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for (X=0; X<Width; X++) {
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ch[X].Char.AsciiChar = *dat++;
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/* WriteConsoleOutputA doesn't like "dead" chars */
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if (ch[X].Char.AsciiChar == '\0')
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ch[X].Char.AsciiChar = ' ';
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ch[X].Attributes = *dat++;
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}
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dest.Left=0; dest.Right=Width+1;
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WriteConsoleOutputA(con, ch, siz, off, &dest);
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}
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}
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vga_refresh=1;
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}
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InterlockedDecrement(&vga_polling);
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}
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static BYTE palreg,palcnt;
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static PALETTEENTRY paldat;
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void VGA_ioport_out( WORD port, BYTE val )
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{
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switch (port) {
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case 0x3c8:
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palreg=val; palcnt=0; break;
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case 0x3c9:
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((BYTE*)&paldat)[palcnt++]=val << 2;
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if (palcnt==3) {
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VGA_SetPalette(&paldat,palreg++,1);
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palcnt=0;
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}
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break;
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}
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}
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BYTE VGA_ioport_in( WORD port )
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{
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BYTE ret;
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switch (port) {
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case 0x3da:
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/* since we don't (yet?) serve DOS VM requests while VGA_Poll is running,
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we need to fake the occurrence of the vertical refresh */
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ret=vga_refresh?0x00:0x08;
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vga_refresh=0;
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break;
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default:
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ret=0xff;
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}
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return ret;
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}
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void VGA_Clean(void)
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{
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VGA_Exit();
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VGA_DeinstallTimer();
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}
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