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winedos: Implement mode control register, and the 160x200x4 display mode that it opens.

This commit is contained in:
Peter Dons Tychsen 2008-11-13 04:02:42 +01:00 committed by Alexandre Julliard
parent 2618bd1a4d
commit b627dd2afc
1 changed files with 90 additions and 4 deletions
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94
dlls/winedos/vga.c
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@ -101,7 +101,9 @@ static int vga_fb_window_size;
static char *vga_fb_window_data;
static PALETTEENTRY *vga_fb_palette;
static unsigned vga_fb_palette_index;
static unsigned vga_fb_palette_size;
static BOOL vga_fb_bright;
static BOOL vga_fb_enabled;
/*
* VGA text mode data.
@ -768,7 +770,7 @@ static void WINAPI VGA_DoSetMode(ULONG_PTR arg)
return;
}
res=IDirectDrawPalette_SetEntries(lpddpal,0,0,4,vga_fb_palette);
res=IDirectDrawPalette_SetEntries(lpddpal,0,0,vga_fb_palette_size,vga_fb_palette);
if (res != S_OK) {
ERR("Could not set default palette entries (res = 0x%x)\n", res);
}
@ -828,12 +830,25 @@ int VGA_SetMode(unsigned Xres,unsigned Yres,unsigned Depth)
vga_fb_window_data = VGA_WINDOW_START;
vga_fb_window_size = VGA_WINDOW_SIZE;
vga_fb_palette = vga_def_palette;
vga_fb_palette_size = 256;
}
else
{
vga_fb_window_data = CGA_WINDOW_START;
vga_fb_window_size = CGA_WINDOW_SIZE;
vga_fb_palette = cga_palette1;
if(Depth == 2)
{
/* Select default 2 bit CGA palette */
vga_fb_palette = cga_palette1;
vga_fb_palette_size = 4;
}
else
{
/* Top of VGA palette is same as 4 bit CGA palette */
vga_fb_palette = vga_def_palette;
vga_fb_palette_size = 16;
}
vga_fb_palette_index = 0;
vga_fb_bright = 0;
}
@ -1069,6 +1084,27 @@ void VGA_SetBright(BOOL bright)
vga_fb_bright = bright;
}
/**********************************************************************
* VGA_SetEnabled
*
* Select if output is enabled or disabled
* This is a property of the CGA controller
*/
void VGA_SetEnabled(BOOL enabled)
{
TRACE("%i\n", enabled);
/* Check if going from enabled to disabled */
if(vga_fb_enabled == TRUE && enabled == FALSE)
{
/* Clear frame buffer */
memset(vga_fb_window_data, 0x00, vga_fb_window_size);
}
/* Remember the "enabled" value */
vga_fb_enabled = enabled;
}
/**********************************************************************
* VGA_SetPaletteIndex
*
@ -1425,9 +1461,44 @@ static void VGA_Poll_Graphics(void)
VGA_SyncWindow( TRUE );
/*
* CGA framebuffer
* CGA framebuffer (160x200)
* This buffer is encoded as following:
* - 4 bit pr. pixel, 2 pixels per byte
* - 80 bytes per row
* - Every second line has an offset of 8096
*/
if(vga_fb_depth == 2 && vga_fb_width == 320 && vga_fb_height == 200){
if(vga_fb_depth == 4 && vga_fb_width == 160 && vga_fb_height == 200){
WORD off = 0;
BYTE bits = 4;
BYTE value;
for(Y=0; Y<vga_fb_height; Y++, surf+=(Pitch*2)){
for(X=0; X<vga_fb_width; X++){
off = Y & 1 ? (8 * 1024) : 0;
off += (80 * (Y/2));
off += X/2;
value = (dat[off] >> bits) & 0xF;
surf[(X*4)+0] = value;
surf[(X*4)+1] = value;
surf[(X*4)+2] = value;
surf[(X*4)+3] = value;
surf[(X*4)+Pitch+0] = value;
surf[(X*4)+Pitch+1] = value;
surf[(X*4)+Pitch+2] = value;
surf[(X*4)+Pitch+3] = value;
bits -= 4;
bits &= 7;
}
}
}
/*
* CGA framebuffer (320x200)
* This buffer is encoded as following:
* - 2 bits per color, 4 pixels per byte
* - 80 bytes per row
* - Every second line has an offset of 8096
*/
else if(vga_fb_depth == 2 && vga_fb_width == 320 && vga_fb_height == 200){
WORD off = 0;
BYTE bits = 6;
BYTE value;
@ -1605,6 +1676,21 @@ void VGA_ioport_out( WORD port, BYTE val )
FIXME("Unsupported index, VGA crt controller register 0x3b4/0x3d4: 0x%02x (value 0x%02x)\n",
vga_index_3d4, val);
break;
/* Mode control register (CGA) */
case 0x3d8:
/* Detect 160x200, 16 color mode (composite) */
if((val & 0x02) && (val & 0x10))
{
/* Switch to 160x200x4 composite mode */
VGA_SetMode(160, 200, 4);
}
/* Set the enabled bit */
VGA_SetEnabled((val & 0x08) && 1);
break;
/* Colour control register (CGA) */
case 0x3d9:
/* Set bright */