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add textmode character underline feature (see sf patch #1805880)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3016
This commit is contained in:
Sebastian Strohhäcker 2007-10-14 13:12:19 +00:00
parent 993f47a01c
commit 280c9c0832
1 changed files with 11 additions and 5 deletions
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16
src/hardware/vga_draw.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga_draw.cpp,v 1.86 2007-10-13 16:34:06 c2woody Exp $ */
/* $Id: vga_draw.cpp,v 1.87 2007-10-14 13:12:19 c2woody Exp $ */
#include <string.h>
#include <math.h>
@ -412,12 +412,14 @@ skip_cursor:
static Bit8u * VGA_TEXT_Draw_Line_9(Bitu vidstart, Bitu line) {
Bits font_addr;
Bit8u * draw=(Bit8u *)TempLine;
bool underline=(vga.crtc.underline_location&0x1f)==line;
Bit8u pel_pan=vga.config.pel_panning;
if ((vga.attr.mode_control&0x20) && (vga.draw.lines_done>=vga.draw.split_line)) pel_pan=0;
const Bit8u *vidmem = &vga.tandy.draw_base[vidstart];
Bit8u chr=vidmem[0];
Bit8u col=vidmem[1];
Bit8u font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
if (underline && ((col&0x07) == 0x01)) font=0xff;
Bit8u fg=col&0xf;
Bit8u bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
Bitu draw_blocks=vga.draw.blocks;
@ -426,13 +428,15 @@ static Bit8u * VGA_TEXT_Draw_Line_9(Bitu vidstart, Bitu line) {
if (pel_pan) {
chr=vidmem[cx*2];
col=vidmem[cx*2+1];
font|=vga.draw.font_tables[(col >> 3)&1][chr*32+line]>>(8-pel_pan);
if (underline && ((col&0x07) == 0x01)) font|=0xff>>(8-pel_pan);
else font|=vga.draw.font_tables[(col >> 3)&1][chr*32+line]>>(8-pel_pan);
fg=col&0xf;
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
} else {
chr=vidmem[(cx-1)*2];
col=vidmem[(cx-1)*2+1];
font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
if (underline && ((col&0x07) == 0x01)) font=0xff;
else font=vga.draw.font_tables[(col >> 3)&1][chr*32+line];
fg=col&0xf;
bg=(Bit8u)(TXT_BG_Table[col>>4]&0xff);
}
@ -444,8 +448,10 @@ static Bit8u * VGA_TEXT_Draw_Line_9(Bitu vidstart, Bitu line) {
Bit8u last=(font&0x01)?fg:bg;
*draw++=last;
*draw++=((chr<0xc0) || (chr>0xdf)) ? bg : last;
if (pel_pan)
font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
if (pel_pan) {
if (underline && ((col&0x07) == 0x01)) font=0xff;
else font=(vga.draw.font_tables[(col >> 3)&1][chr*32+line])<<pel_pan;
}
}
if (!vga.draw.cursor.enabled || !(vga.draw.cursor.count&0x8)) goto skip_cursor;
font_addr = (vga.draw.cursor.address-vidstart) >> 1;