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Fix line drawing

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svn path=/trunk/; revision=5574
This commit is contained in:
Gé van Geldorp 2003-08-14 22:34:16 +00:00
parent dacc05c901
commit 168a174267
1 changed files with 7 additions and 9 deletions
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16
reactos/subsys/win32k/eng/lineto.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* *
* $Id: lineto.c,v 1.22 2003/08/13 20:24:04 chorns Exp $ * $Id: lineto.c,v 1.23 2003/08/14 22:34:16 gvg Exp $
*/ */
#include <ddk/winddi.h> #include <ddk/winddi.h>
@ -71,7 +71,7 @@ NWtoSE(PSURFOBJ OutputObj, PSURFGDI OutputGDI, PCLIPOBJ Clip,
ClipRect = RectEnum.arcl; ClipRect = RectEnum.arcl;
delta = max(deltax, deltay); delta = max(deltax, deltay);
i = 0; i = 0;
error = 0; error = delta / 2;
while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore)) while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
{ {
while ((ClipRect < RectEnum.arcl + RectEnum.c /* there's still a current clip rect */ while ((ClipRect < RectEnum.arcl + RectEnum.c /* there's still a current clip rect */
@ -141,7 +141,7 @@ SWtoNE(PSURFOBJ OutputObj, PSURFGDI OutputGDI, PCLIPOBJ Clip,
ClipRect = RectEnum.arcl; ClipRect = RectEnum.arcl;
delta = max(deltax, deltay); delta = max(deltax, deltay);
i = 0; i = 0;
error = 0; error = delta / 2;
while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore)) while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
{ {
while ((ClipRect < RectEnum.arcl + RectEnum.c while ((ClipRect < RectEnum.arcl + RectEnum.c
@ -210,7 +210,7 @@ NEtoSW(PSURFOBJ OutputObj, PSURFGDI OutputGDI, PCLIPOBJ Clip,
ClipRect = RectEnum.arcl; ClipRect = RectEnum.arcl;
delta = max(deltax, deltay); delta = max(deltax, deltay);
i = 0; i = 0;
error = 0; error = delta / 2;
while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore)) while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
{ {
while ((ClipRect < RectEnum.arcl + RectEnum.c while ((ClipRect < RectEnum.arcl + RectEnum.c
@ -279,7 +279,7 @@ SEtoNW(PSURFOBJ OutputObj, PSURFGDI OutputGDI, PCLIPOBJ Clip,
ClipRect = RectEnum.arcl; ClipRect = RectEnum.arcl;
delta = max(deltax, deltay); delta = max(deltax, deltay);
i = 0; i = 0;
error = 0; error = delta / 2;
while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore)) while (i < delta && (ClipRect < RectEnum.arcl + RectEnum.c || EnumMore))
{ {
while ((ClipRect < RectEnum.arcl + RectEnum.c while ((ClipRect < RectEnum.arcl + RectEnum.c
@ -394,8 +394,7 @@ EngLineTo(SURFOBJ *DestObj,
{ {
xchange = -1; xchange = -1;
deltax = - deltax; deltax = - deltax;
hx = x2; hx = x2 + 1;
x--;
} }
else else
{ {
@ -407,8 +406,7 @@ EngLineTo(SURFOBJ *DestObj,
{ {
ychange = -1; ychange = -1;
deltay = - deltay; deltay = - deltay;
vy = y2; vy = y2 + 1;
y--;
} }
else else
{ {