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Add support for character fonts wrapping around segment limits

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2662
This commit is contained in:
Sjoerd van der Berg 2006-06-27 07:32:42 +00:00
parent 1a6a92a423
commit 930207e209
1 changed files with 10 additions and 6 deletions
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16
src/ints/int10_char.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: int10_char.cpp,v 1.47 2006-03-27 19:31:54 c2woody Exp $ */
/* $Id: int10_char.cpp,v 1.48 2006-06-27 07:32:42 harekiet Exp $ */
/* Character displaying moving functions */
@ -438,7 +438,7 @@ void INT10_ReadCharAttr(Bit16u * result,Bit8u page) {
}
void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool useattr) {
/* Externally used by the mouse routine */
PhysPt fontdata;
RealPt fontdata;
Bitu x,y;
Bit8u cheight = real_readb(BIOSMEM_SEG,BIOSMEM_CHAR_HEIGHT);
switch (CurMode->type) {
@ -458,14 +458,17 @@ void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool useatt
case M_CGA4:
case M_CGA2:
case M_TANDY16:
if (chr<128) fontdata=Real2Phys(RealGetVec(0x43))+chr*cheight;
if (chr<128)
fontdata=RealGetVec(0x43);
else {
chr-=128;
fontdata=Real2Phys(RealGetVec(0x1F))+(chr)*cheight;
fontdata=RealGetVec(0x1f);
}
fontdata=RealMake(RealSeg(fontdata), RealOff(fontdata) + chr*cheight);
break;
default:
fontdata=Real2Phys(RealGetVec(0x43))+chr*cheight;
fontdata=RealGetVec(0x43);
fontdata=RealMake(RealSeg(fontdata), RealOff(fontdata) + chr*cheight);
break;
}
@ -503,7 +506,8 @@ void WriteChar(Bit16u col,Bit16u row,Bit8u page,Bit8u chr,Bit8u attr,bool useatt
}
for (Bit8u h=0;h<cheight;h++) {
Bit8u bitsel=128;
Bit8u bitline=mem_readb(fontdata++);
Bit8u bitline = mem_readb(Real2Phys( fontdata ));
fontdata = RealMake( RealSeg( fontdata ), RealOff( fontdata ) + 1);
Bit16u tx=x;
while (bitsel) {
if (bitline&bitsel) INT10_PutPixel(tx,y,page,attr);