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revert some linecompare hack, fix vga drawing start for zero-linecompare values (fixes Event Horizon game glitches)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3135
This commit is contained in:
Sebastian Strohhäcker 2008-03-30 19:59:42 +00:00
parent 5491001923
commit cb14a46164
1 changed files with 8 additions and 4 deletions
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12
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 1.94 2008-03-30 18:02:23 qbix79 Exp $ */
/* $Id: vga_draw.cpp,v 1.95 2008-03-30 19:59:42 c2woody Exp $ */
#include <string.h>
#include <math.h>
@ -671,8 +671,8 @@ static void VGA_DrawPart(Bitu lines) {
vga.draw.address_line=0;
vga.draw.address+=vga.draw.address_add;
}
// vga.draw.lines_done++;
if (vga.draw.split_line==vga.draw.lines_done++) {
vga.draw.lines_done++;
if (vga.draw.split_line==vga.draw.lines_done) {
#ifdef VGA_KEEP_CHANGES
VGA_ChangesEnd( );
#endif
@ -801,6 +801,8 @@ static void VGA_VerticalTimer(Bitu val) {
case M_LIN4:
vga.draw.address *= 8;
vga.draw.address += vga.config.pel_panning;
if ((vga.draw.split_line==0) && (vga.attr.mode_control&0x20))
vga.draw.address = 0;
#ifdef VGA_KEEP_CHANGES
VGA_ChangesStart();
#endif
@ -819,6 +821,8 @@ static void VGA_VerticalTimer(Bitu val) {
case M_LIN32:
vga.draw.address *= 4;
vga.draw.address += vga.config.pel_panning;
if ((vga.draw.split_line==0) && (vga.attr.mode_control&0x20))
vga.draw.address = 0;
#ifdef VGA_KEEP_CHANGES
VGA_ChangesStart();
#endif
@ -1318,8 +1322,8 @@ void VGA_SetupDrawing(Bitu val) {
}
if(!(IS_VGA_ARCH && (svgaCard==SVGA_None) && (vga.mode==M_EGA || vga.mode==M_VGA))) {
// what is this hack needed for?
//Only check for extra double height in vga modes
//(line multiplying by address_line_total)
if (!doubleheight && (vga.mode<M_TEXT) && !(vga.draw.address_line_total & 1)) {
vga.draw.address_line_total/=2;
doubleheight=true;