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Add suppport for the dac pel mask

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2785
This commit is contained in:
Sjoerd van der Berg 2007-01-25 08:08:14 +00:00
parent b9e934fd97
commit a1e661ddbb
1 changed files with 24 additions and 14 deletions
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38
src/hardware/vga_dac.cpp
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@ -50,10 +50,22 @@ Note: Each read or write of this register will cycle through first the
enum {DAC_READ,DAC_WRITE};
static INLINE void VGA_DAC_UpdateColor( Bitu index ) {
Bitu maskIndex = index & vga.dac.pel_mask;
RENDER_SetPal( index,
vga.dac.rgb[maskIndex].red << 2,
vga.dac.rgb[maskIndex].green << 2,
vga.dac.rgb[maskIndex].blue << 2
);
}
static void write_p3c6(Bitu port,Bitu val,Bitu iolen) {
if (val!=0xff) LOG(LOG_VGAGFX,LOG_NORMAL)("VGA:Pel Mask not 0xff");
vga.dac.pel_mask=val;
if ( vga.dac.pel_mask != val ) {
LOG(LOG_VGAMISC,LOG_NORMAL)("VGA:DCA:Pel Mask set to %X", val);
vga.dac.pel_mask = val;
for ( Bitu i = 0;i<256;i++)
VGA_DAC_UpdateColor( i );
}
}
@ -100,12 +112,15 @@ static void write_p3c9(Bitu port,Bitu val,Bitu iolen) {
switch (vga.mode) {
case M_VGA:
case M_LIN8:
case M_LIN16:
RENDER_SetPal(vga.dac.write_index,
vga.dac.rgb[vga.dac.write_index].red << 2,
vga.dac.rgb[vga.dac.write_index].green << 2,
vga.dac.rgb[vga.dac.write_index].blue << 2
);
VGA_DAC_UpdateColor( vga.dac.write_index );
if ( GCC_UNLIKELY( vga.dac.pel_mask != 0xff)) {
Bitu index = vga.dac.write_index;
if ( (index & vga.dac.pel_mask) == index ) {
for ( Bitu i = index+1;i<256;i++)
if ( (i & vga.dac.pel_mask) == index )
VGA_DAC_UpdateColor( i );
}
}
break;
default:
/* Check for attributes and DAC entry link */
@ -168,15 +183,10 @@ void VGA_DAC_CombineColor(Bit8u attr,Bit8u pal) {
}
void VGA_DAC_SetEntry(Bitu entry,Bit8u red,Bit8u green,Bit8u blue) {
//Should only be called in machine != vga
vga.dac.rgb[entry].red=red;
vga.dac.rgb[entry].green=green;
vga.dac.rgb[entry].blue=blue;
switch (vga.mode) {
case M_VGA:
case M_LIN8:
case M_LIN16:
return;
}
for (Bitu i=0;i<16;i++)
if (vga.attr.palette[i]==entry)
RENDER_SetPal(i,red << 2,green << 2,blue << 2);