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Low-resolution and low-color VGA modes are now mapped into mode 

640x480x8. Added preliminary support for four bit modes.
This commit is contained in:
Jukka Heinonen 2002-01-29 02:46:43 +00:00 committed by Alexandre Julliard
parent a4605ac000
commit a900cb8797
1 changed files with 74 additions and 15 deletions
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89
dlls/winedos/vga.c
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@ -26,6 +26,10 @@ static DDSURFACEDESC sdesc;
static LONG vga_polling,vga_refresh;
static HANDLE poll_timer;
static int vga_width;
static int vga_height;
static int vga_depth;
typedef HRESULT WINAPI (*DirectDrawCreateProc)(LPGUID,LPDIRECTDRAW *,LPUNKNOWN);
static DirectDrawCreateProc pDirectDrawCreate;
@ -155,9 +159,21 @@ static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
{
ModeSet par;
par.Xres = Xres;
par.Yres = Yres;
par.Depth = Depth;
vga_width = Xres;
vga_height = Yres;
vga_depth = Depth;
if(Xres >= 640 || Yres >= 480) {
par.Xres = Xres;
par.Yres = Yres;
} else {
par.Xres = 640;
par.Yres = 480;
}
par.Depth = (Depth < 8) ? 8 : Depth;
MZ_RunInThread(VGA_DoSetMode, (ULONG_PTR)&par);
return par.ret;
}
@ -290,26 +306,69 @@ void VGA_WriteChars(unsigned X,unsigned Y,unsigned ch,int attr,int count)
/*** CONTROL ***/
static void VGA_Poll_Graphics(void)
{
unsigned int Pitch, Height, Width, X, Y;
char *surf;
char *dat = DOSMEM_MapDosToLinear(0xa0000);
surf = VGA_Lock(&Pitch,&Height,&Width,NULL);
if (!surf) return;
if(vga_width == 320 && vga_depth <= 4)
for (Y=0; Y<vga_height; Y++,surf+=Pitch*2,dat+=vga_width/8) {
for(X=0; X<vga_width; X+=8) {
int offset = X/8;
int Z;
for(Z=0; Z<8; Z++) {
int b0 = (dat[offset] >> Z) & 0x1;
int index = 7-Z;
surf[(X+index)*2] = b0;
surf[(X+index)*2+1] = b0;
surf[(X+index)*2+Pitch] = b0;
surf[(X+index)*2+Pitch+1] = b0;
}
}
}
if(vga_width == 320 && vga_depth == 8)
for (Y=0; Y<vga_height; Y++,surf+=Pitch*2,dat+=vga_width) {
for(X=0; X<vga_width; X++) {
int b0 = dat[X];
surf[X*2] = b0;
surf[X*2+1] = b0;
surf[X*2+Pitch] = b0;
surf[X*2+Pitch+1] = b0;
}
}
if(vga_depth <= 4)
for (Y=0; Y<vga_height; Y++,surf+=Pitch,dat+=vga_width/8) {
for(X=0; X<vga_width; X+=8) {
int offset = X/8;
int Z;
for(Z=0; Z<8; Z++) {
int b0 = (dat[offset] >> Z) & 0x1;
int index = 7-Z;
surf[X+index] = b0;
}
}
}
VGA_Unlock();
}
void CALLBACK VGA_Poll( ULONG_PTR arg )
{
char *dat;
unsigned int Pitch,Height,Width,Y,X;
char *surf;
unsigned int Height,Width,Y,X;
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();
VGA_Poll_Graphics();
} else {
/* text mode */
CHAR_INFO ch[80];