Misha Koshelev : gdi32: Set current position properly after ArcTo.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 80b7134bb801bbe4994d12712a5eceedf9248519
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=80b7134bb801bbe4994d12712a5eceedf9248519

Author: Misha Koshelev <mk144210 at bcm.edu>
Date:   Wed Jun 20 17:02:41 2007 -0500

gdi32: Set current position properly after ArcTo.

---

 dlls/gdi32/painting.c   |   46 ++++++++++++++++------------------------------
 dlls/gdi32/tests/path.c |    2 +-
 2 files changed, 17 insertions(+), 31 deletions(-)

diff --git a/dlls/gdi32/painting.c b/dlls/gdi32/painting.c
index 807fee4..838e0e0 100644
--- a/dlls/gdi32/painting.c
+++ b/dlls/gdi32/painting.c
@@ -113,6 +113,13 @@ BOOL WINAPI ArcTo( HDC hdc,
                      INT xstart, INT ystart,
                      INT xend,   INT yend )
 {
+    double width = fabs(right-left),
+        height = fabs(bottom-top),
+        xradius = width/2,
+        yradius = height/2,
+        xcenter = right > left ? left+xradius : right+xradius,
+        ycenter = bottom > top ? top+yradius : bottom+yradius,
+        angle;
     BOOL result;
     DC * dc = DC_GetDCUpdate( hdc );
     if(!dc) return FALSE;
@@ -120,40 +127,19 @@ BOOL WINAPI ArcTo( HDC hdc,
     if(dc->funcs->pArcTo)
         result = dc->funcs->pArcTo( dc->physDev, left, top, right, bottom,
 				  xstart, ystart, xend, yend );
-    else
+    else /* We'll draw a line from the current position to the starting point of the arc, then draw the arc */
     {
-        double width = fabs(right-left),
-            height = fabs(bottom-top),
-            xradius = width/2,
-            yradius = height/2,
-            xcenter = right > left ? left+xradius : right+xradius,
-            ycenter = bottom > top ? top+yradius : bottom+yradius;
-        /*
-         * Else emulate it.
-         * According to the documentation, a line is drawn from the current
-         * position to the starting point of the arc.
-         */
-        double angle = atan2(
-            ((ystart-ycenter)/height),
-            ((xstart-xcenter)/width));
+        angle = atan2(((ystart-ycenter)/height),
+                      ((xstart-xcenter)/width));
         LineTo(hdc, GDI_ROUND(xcenter+(cos(angle)*xradius)),
                GDI_ROUND(ycenter+(sin(angle)*yradius)));
-        /*
-         * Then the arc is drawn.
-         */
         result = Arc(hdc, left, top, right, bottom, xstart, ystart, xend, yend);
-        /*
-         * If no error occurred, the current position is moved to the ending
-         * point of the arc.
-         */
-        if (result)
-        {
-            angle = atan2(
-                ((yend-ycenter)/height),
-                ((xend-xcenter)/width));
-            MoveToEx(hdc, GDI_ROUND(xcenter+(cos(angle)*xradius)),
-                     GDI_ROUND(ycenter+(sin(angle)*yradius)), NULL);
-        }
+    }
+    if (result) {
+        angle = atan2(((yend-ycenter)/height),
+                      ((xend-xcenter)/width));
+        dc->CursPosX = GDI_ROUND(xcenter+(cos(angle)*xradius));
+        dc->CursPosY = GDI_ROUND(ycenter+(sin(angle)*yradius));
     }
     GDI_ReleaseObj( hdc );
     return result;
diff --git a/dlls/gdi32/tests/path.c b/dlls/gdi32/tests/path.c
index bd7c12c..2a80377 100644
--- a/dlls/gdi32/tests/path.c
+++ b/dlls/gdi32/tests/path.c
@@ -203,7 +203,7 @@ static const path_test_t arcto_path[] = {
     {399, 263, PT_BEZIERTO, 0, 0}, /* 8 */
     {389, 275, PT_BEZIERTO, 0, 0}, /* 9 */
     {370, 285, PT_BEZIERTO, 0, 0}, /* 10 */
-    {363, 277, PT_LINETO, 1, 0}, /* 11 */
+    {363, 277, PT_LINETO, 0, 0}, /* 11 */
     {380, 270, PT_BEZIERTO, 1, 0}, /* 12 */
     {389, 260, PT_BEZIERTO, 0, 0}, /* 13 */
     {389, 250, PT_BEZIERTO, 0, 0}, /* 14 */