gdi32: Avoid some rounding errors in AngleArc.

dlls/gdi32/painting.c

@@ -854,8 +854,8 @@ BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, F
     if(!dc) return FALSE;
 
     /* Calculate the end point */
-    x2 = x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
-    y2 = y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
+    x2 = GDI_ROUND( x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
+    y2 = GDI_ROUND( y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius );
 
     if(!PATH_IsPathOpen(dc->path) && dc->funcs->pAngleArc)
     {
@@ -863,8 +863,8 @@ BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, F
         result = dc->funcs->pAngleArc( dc->physDev, x, y, dwRadius, eStartAngle, eSweepAngle );
     }
     else { /* do it using ArcTo */
-        x1 = x + cos(eStartAngle*M_PI/180) * dwRadius;
-        y1 = y - sin(eStartAngle*M_PI/180) * dwRadius;
+        x1 = GDI_ROUND( x + cos(eStartAngle*M_PI/180) * dwRadius );
+        y1 = GDI_ROUND( y - sin(eStartAngle*M_PI/180) * dwRadius );
 
         arcdir = SetArcDirection( hdc, eSweepAngle >= 0 ? AD_COUNTERCLOCKWISE : AD_CLOCKWISE);
         result = ArcTo( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,

dlls/gdi32/tests/path.c

@@ -260,9 +260,9 @@ static const path_test_t anglearc_path[] = {
     {245, 200, PT_BEZIERTO, 0, 0}, /* 5 */
     {200, 245, PT_BEZIERTO, 0, 0}, /* 6 */
     {200, 300, PT_BEZIERTO, 0, 0}, /* 7 */
-    {200, 300, PT_BEZIERTO, 0, 2}, /* 8 */
-    {200, 300, PT_BEZIERTO, 0, 2}, /* 9 */
-    {200, 300, PT_BEZIERTO, 0, 2}, /* 10 */
+    {200, 300, PT_BEZIERTO, 0, 0}, /* 8 */
+    {200, 300, PT_BEZIERTO, 0, 0}, /* 9 */
+    {200, 300, PT_BEZIERTO, 0, 0}, /* 10 */
     {231, 260, PT_LINETO, 0, 0}, /* 11 */
     {245, 235, PT_BEZIERTO, 0, 0}, /* 12 */
     {271, 220, PT_BEZIERTO, 0, 0}, /* 13 */
@@ -289,7 +289,7 @@ static void test_anglearc(void)
     CloseFigure(hdc);
     EndPath(hdc);
 
-    ok_path(hdc, "anglearc_path", anglearc_path, sizeof(anglearc_path)/sizeof(path_test_t), 1);
+    ok_path(hdc, "anglearc_path", anglearc_path, sizeof(anglearc_path)/sizeof(path_test_t), 0);
 done:
     ReleaseDC(0, hdc);
 }