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Sweden-Number/msdos/vga.c

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C
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/*
* VGA hardware emulation
*
* Copyright 1998 Ove Kåven (with some help from Marcus Meissner)
*
*/
#include <string.h>
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "wincon.h"
#include "miscemu.h"
#include "callback.h"
#include "vga.h"
#include "ddraw.h"
#include "services.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(ddraw);
static IDirectDraw *lpddraw = NULL;
static IDirectDrawSurface *lpddsurf;
static IDirectDrawPalette *lpddpal;
static DDSURFACEDESC sdesc;
static LONG vga_polling,vga_refresh;
static HANDLE poll_timer;
typedef HRESULT WINAPI (*DirectDrawCreateProc)(LPGUID,LPDIRECTDRAW *,LPUNKNOWN);
static DirectDrawCreateProc pDirectDrawCreate;
typedef HWND WINAPI (*CreateWindowExAProc)(DWORD,LPCSTR,LPCSTR,DWORD,INT,INT, INT,INT,HWND,HMENU,HINSTANCE,LPVOID);
static CreateWindowExAProc pCreateWindowExA;
static PALETTEENTRY vga_def_palette[256]={
/* red green blue */
{0x00, 0x00, 0x00}, /* 0 - Black */
{0x00, 0x00, 0x80}, /* 1 - Blue */
{0x00, 0x80, 0x00}, /* 2 - Green */
{0x00, 0x80, 0x80}, /* 3 - Cyan */
{0x80, 0x00, 0x00}, /* 4 - Red */
{0x80, 0x00, 0x80}, /* 5 - Magenta */
{0x80, 0x80, 0x00}, /* 6 - Brown */
{0xC0, 0xC0, 0xC0}, /* 7 - Light gray */
{0x80, 0x80, 0x80}, /* 8 - Dark gray */
{0x00, 0x00, 0xFF}, /* 9 - Light blue */
{0x00, 0xFF, 0x00}, /* A - Light green */
{0x00, 0xFF, 0xFF}, /* B - Light cyan */
{0xFF, 0x00, 0x00}, /* C - Light red */
{0xFF, 0x00, 0xFF}, /* D - Light magenta */
{0xFF, 0xFF, 0x00}, /* E - Yellow */
{0xFF, 0xFF, 0xFF}, /* F - White */
{0,0,0} /* FIXME: a series of continuous rainbow hues should follow */
};
static void VGA_DeinstallTimer(void)
{
if (poll_timer) {
SERVICE_Delete( poll_timer );
poll_timer = 0;
}
}
static void VGA_InstallTimer(unsigned Rate)
{
VGA_DeinstallTimer();
if (!poll_timer)
poll_timer = SERVICE_AddTimer( Rate, VGA_Poll, 0 );
}
HANDLE VGA_AlphaConsole(void)
{
/* this assumes that no Win32 redirection has taken place, but then again,
* only 16-bit apps are likely to use this part of Wine... */
return GetStdHandle(STD_OUTPUT_HANDLE);
}
char*VGA_AlphaBuffer(void)
{
return DOSMEM_MapDosToLinear(0xb8000);
}
/*** GRAPHICS MODE ***/
typedef struct {
unsigned Xres, Yres, Depth;
int ret;
} ModeSet;
static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
{
LRESULT res;
HWND hwnd;
ModeSet *par = (ModeSet *)arg;
par->ret=1;
if (lpddraw) VGA_Exit();
if (!lpddraw) {
if (!pDirectDrawCreate)
{
HMODULE hmod = LoadLibraryA( "ddraw.dll" );
if (hmod) pDirectDrawCreate = (DirectDrawCreateProc)GetProcAddress( hmod, "DirectDrawCreate" );
if (!pDirectDrawCreate) {
ERR("Can't lookup DirectDrawCreate from ddraw.dll.\n");
return;
}
}
if (!pCreateWindowExA)
{
HMODULE hmod = LoadLibraryA( "user32.dll" );
if (!hmod) {
ERR("Can't load user32.dll.\n");
return;
}
if (hmod) pCreateWindowExA = (CreateWindowExAProc)GetProcAddress( hmod, "CreateWindowExA" );
if (!pCreateWindowExA) {
ERR("Can't lookup CreateWindowExA from user32.dll.\n");
return;
}
}
res = pDirectDrawCreate(NULL,&lpddraw,NULL);
if (!lpddraw) {
ERR("DirectDraw is not available (res = %lx)\n",res);
return;
}
hwnd = pCreateWindowExA(0,"STATIC","WINEDOS VGA",WS_POPUP|WS_BORDER|WS_CAPTION|WS_SYSMENU,0,0,par->Xres,par->Yres,0,0,0,NULL);
if (!hwnd) {
ERR("Failed to create user window.\n");
}
if ((res=IDirectDraw_SetCooperativeLevel(lpddraw,hwnd,DDSCL_FULLSCREEN|DDSCL_EXCLUSIVE))) {
ERR("Could not set cooperative level to exclusive (%lx)\n",res);
}
if ((res=IDirectDraw_SetDisplayMode(lpddraw,par->Xres,par->Yres,par->Depth))) {
ERR("DirectDraw does not support requested display mode (%dx%dx%d), res = %lx!\n",par->Xres,par->Yres,par->Depth,res);
IDirectDraw_Release(lpddraw);
lpddraw=NULL;
return;
}
res=IDirectDraw_CreatePalette(lpddraw,DDPCAPS_8BIT,NULL,&lpddpal,NULL);
if (res) {
ERR("Could not create palette (res = %lx)\n",res);
IDirectDraw_Release(lpddraw);
lpddraw=NULL;
return;
}
if ((res=IDirectDrawPalette_SetEntries(lpddpal,0,0,256,vga_def_palette))) {
ERR("Could not set default palette entries (res = %lx)\n", res);
}
memset(&sdesc,0,sizeof(sdesc));
sdesc.dwSize=sizeof(sdesc);
sdesc.dwFlags = DDSD_CAPS;
sdesc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
if (IDirectDraw_CreateSurface(lpddraw,&sdesc,&lpddsurf,NULL)||(!lpddsurf)) {
ERR("DirectDraw surface is not available\n");
IDirectDraw_Release(lpddraw);
lpddraw=NULL;
return;
}
IDirectDrawSurface_SetPalette(lpddsurf,lpddpal);
vga_refresh=0;
/* poll every 20ms (50fps should provide adequate responsiveness) */
VGA_InstallTimer(20);
}
par->ret=0;
return;
}
int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
{
ModeSet par;
par.Xres = Xres;
par.Yres = Yres;
par.Depth = Depth;
if (Dosvm.RunInThread) Dosvm.RunInThread(VGA_DoSetMode, (ULONG_PTR)&par);
else VGA_DoSetMode((ULONG_PTR)&par);
return par.ret;
}
int VGA_GetMode(unsigned*Height,unsigned*Width,unsigned*Depth)
{
if (!lpddraw) return 1;
if (!lpddsurf) return 1;
if (Height) *Height=sdesc.dwHeight;
if (Width) *Width=sdesc.dwWidth;
if (Depth) *Depth=sdesc.ddpfPixelFormat.u1.dwRGBBitCount;
return 0;
}
static void WINAPI VGA_DoExit(ULONG_PTR arg)
{
VGA_DeinstallTimer();
IDirectDrawSurface_SetPalette(lpddsurf,NULL);
IDirectDrawSurface_Release(lpddsurf);
lpddsurf=NULL;
IDirectDrawPalette_Release(lpddpal);
lpddpal=NULL;
IDirectDraw_Release(lpddraw);
lpddraw=NULL;
}
void VGA_Exit(void)
{
if (lpddraw) {
if (Dosvm.RunInThread) Dosvm.RunInThread(VGA_DoExit, 0);
else VGA_DoExit(0);
}
}
void VGA_SetPalette(PALETTEENTRY*pal,int start,int len)
{
if (!lpddraw) return;
IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
}
void VGA_SetQuadPalette(RGBQUAD*color,int start,int len)
{
PALETTEENTRY pal[256];
int c;
if (!lpddraw) return;
for (c=0; c<len; c++) {
pal[c].peRed =color[c].rgbRed;
pal[c].peGreen=color[c].rgbGreen;
pal[c].peBlue =color[c].rgbBlue;
pal[c].peFlags=0;
}
IDirectDrawPalette_SetEntries(lpddpal,0,start,len,pal);
}
LPSTR VGA_Lock(unsigned*Pitch,unsigned*Height,unsigned*Width,unsigned*Depth)
{
if (!lpddraw) return NULL;
if (!lpddsurf) return NULL;
if (IDirectDrawSurface_Lock(lpddsurf,NULL,&sdesc,0,0)) {
ERR("could not lock surface!\n");
return NULL;
}
if (Pitch) *Pitch=sdesc.u1.lPitch;
if (Height) *Height=sdesc.dwHeight;
if (Width) *Width=sdesc.dwWidth;
if (Depth) *Depth=sdesc.ddpfPixelFormat.u1.dwRGBBitCount;
return sdesc.lpSurface;
}
void VGA_Unlock(void)
{
IDirectDrawSurface_Unlock(lpddsurf,sdesc.lpSurface);
}
/*** TEXT MODE ***/
int VGA_SetAlphaMode(unsigned Xres,unsigned Yres)
{
COORD siz;
if (lpddraw) VGA_Exit();
/* the xterm is slow, so refresh only every 200ms (5fps) */
VGA_InstallTimer(200);
siz.X = Xres;
siz.Y = Yres;
SetConsoleScreenBufferSize(VGA_AlphaConsole(),siz);
return 0;
}
void VGA_GetAlphaMode(unsigned*Xres,unsigned*Yres)
{
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
if (Xres) *Xres=info.dwSize.X;
if (Yres) *Yres=info.dwSize.Y;
}
void VGA_SetCursorPos(unsigned X,unsigned Y)
{
COORD pos;
if (!poll_timer) VGA_SetAlphaMode(80, 25);
pos.X = X;
pos.Y = Y;
SetConsoleCursorPosition(VGA_AlphaConsole(),pos);
}
void VGA_GetCursorPos(unsigned*X,unsigned*Y)
{
CONSOLE_SCREEN_BUFFER_INFO info;
GetConsoleScreenBufferInfo(VGA_AlphaConsole(),&info);
if (X) *X=info.dwCursorPosition.X;
if (Y) *Y=info.dwCursorPosition.Y;
}
void VGA_WriteChars(unsigned X,unsigned Y,unsigned ch,int attr,int count)
{
unsigned XR, YR;
char*dat;
VGA_GetAlphaMode(&XR, &YR);
dat = VGA_AlphaBuffer() + ((XR*Y + X) * 2);
/* FIXME: also call WriteConsoleOutputA, for better responsiveness */
while (count--) {
*dat++ = ch;
if (attr>=0) *dat = attr;
dat++;
}
}
/*** CONTROL ***/
void CALLBACK VGA_Poll( ULONG_PTR arg )
{
char *dat;
unsigned int Pitch,Height,Width,Y,X;
char *surf;
if (!InterlockedExchangeAdd(&vga_polling, 1)) {
/* FIXME: optimize by doing this only if the data has actually changed
* (in a way similar to DIBSection, perhaps) */
if (lpddraw) {
/* graphics mode */
surf = VGA_Lock(&Pitch,&Height,&Width,NULL);
if (!surf) return;
dat = DOSMEM_MapDosToLinear(0xa0000);
/* copy from virtual VGA frame buffer to DirectDraw surface */
for (Y=0; Y<Height; Y++,surf+=Pitch,dat+=Width) {
memcpy(surf,dat,Width);
/*for (X=0; X<Width; X++) if (dat[X]) TRACE(ddraw,"data(%d) at (%d,%d)\n",dat[X],X,Y);*/
}
VGA_Unlock();
} else {
/* text mode */
CHAR_INFO ch[80];
COORD siz, off;
SMALL_RECT dest;
HANDLE con = VGA_AlphaConsole();
VGA_GetAlphaMode(&Width,&Height);
dat = VGA_AlphaBuffer();
siz.X = 80; siz.Y = 1;
off.X = 0; off.Y = 0;
/* copy from virtual VGA frame buffer to console */
for (Y=0; Y<Height; Y++) {
dest.Top=Y; dest.Bottom=Y;
for (X=0; X<Width; X++) {
ch[X].Char.AsciiChar = *dat++;
/* WriteConsoleOutputA doesn't like "dead" chars */
if (ch[X].Char.AsciiChar == '\0')
ch[X].Char.AsciiChar = ' ';
ch[X].Attributes = *dat++;
}
dest.Left=0; dest.Right=Width+1;
FIXME("output commented out for now, should be moved to winedos.dll\n");
/*WriteConsoleOutputA(con, ch, siz, off, &dest);*/
}
}
vga_refresh=1;
}
InterlockedDecrement(&vga_polling);
}
static BYTE palreg,palcnt;
static PALETTEENTRY paldat;
void VGA_ioport_out( WORD port, BYTE val )
{
switch (port) {
case 0x3c8:
palreg=val; palcnt=0; break;
case 0x3c9:
((BYTE*)&paldat)[palcnt++]=val << 2;
if (palcnt==3) {
VGA_SetPalette(&paldat,palreg++,1);
palcnt=0;
}
break;
}
}
BYTE VGA_ioport_in( WORD port )
{
BYTE ret;
switch (port) {
case 0x3da:
/* since we don't (yet?) serve DOS VM requests while VGA_Poll is running,
we need to fake the occurrence of the vertical refresh */
ret=vga_refresh?0x00:0x08;
vga_refresh=0;
break;
default:
ret=0xff;
}
return ret;
}
void VGA_Clean(void)
{
VGA_Exit();
VGA_DeinstallTimer();
}
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