Misha Koshelev : gdi32: Emulate AngleArc using ArcTo.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 920b050a8b583534bd33336a81814450cf05afd2
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=920b050a8b583534bd33336a81814450cf05afd2

Author: Misha Koshelev <mk144210 at bcm.edu>
Date:   Thu Jun 21 23:39:18 2007 -0500

gdi32: Emulate AngleArc using ArcTo.

---

 dlls/gdi32/painting.c   |   41 ++++++++++++++++-------------------------
 dlls/gdi32/tests/path.c |   24 ++++++++++++------------
 2 files changed, 28 insertions(+), 37 deletions(-)

diff --git a/dlls/gdi32/painting.c b/dlls/gdi32/painting.c
index ea36421..98bae33 100644
--- a/dlls/gdi32/painting.c
+++ b/dlls/gdi32/painting.c
@@ -793,34 +793,25 @@ BOOL WINAPI AngleArc(HDC hdc, INT x, INT y, DWORD dwRadius, FLOAT eStartAngle, F
     dc = DC_GetDCUpdate( hdc );
     if(!dc) return FALSE;
 
-    if(dc->funcs->pAngleArc)
-    {
-        result = dc->funcs->pAngleArc( dc->physDev, x, y, dwRadius, eStartAngle, eSweepAngle );
-
-        GDI_ReleaseObj( hdc );
-        return result;
-    }
-    GDI_ReleaseObj( hdc );
-
-    /* AngleArc always works counterclockwise */
-    arcdir = GetArcDirection( hdc );
-    SetArcDirection( hdc, AD_COUNTERCLOCKWISE );
-
-    x1 = x + cos(eStartAngle*M_PI/180) * dwRadius;
-    y1 = y - sin(eStartAngle*M_PI/180) * dwRadius;
+    /* Calculate the end point */
     x2 = x + cos((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
     y2 = y - sin((eStartAngle+eSweepAngle)*M_PI/180) * dwRadius;
 
-    LineTo( hdc, x1, y1 );
-    if( eSweepAngle >= 0 )
-        result = Arc( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
-		      x1, y1, x2, y2 );
-    else
-	result = Arc( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
-		      x2, y2, x1, y1 );
-
-    if( result ) MoveToEx( hdc, x2, y2, NULL );
-    SetArcDirection( hdc, arcdir );
+    if(!PATH_IsPathOpen(dc->path) && dc->funcs->pAngleArc)
+        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;
+
+        arcdir = SetArcDirection( hdc, eSweepAngle >= 0 ? AD_COUNTERCLOCKWISE : AD_CLOCKWISE);
+        result = ArcTo( hdc, x-dwRadius, y-dwRadius, x+dwRadius, y+dwRadius,
+                        x1, y1, x2, y2 );
+        SetArcDirection( hdc, arcdir );
+    }
+    if (result) {
+        dc->CursPosX = x2;
+        dc->CursPosY = y2;
+    }
     return result;
 }
 
diff --git a/dlls/gdi32/tests/path.c b/dlls/gdi32/tests/path.c
index 385a524..492673a 100644
--- a/dlls/gdi32/tests/path.c
+++ b/dlls/gdi32/tests/path.c
@@ -252,7 +252,7 @@ done:
 static const path_test_t anglearc_path[] = {
     {0, 0, PT_MOVETO, 0, 0}, /* 0 */
     {371, 229, PT_LINETO, 0, 0}, /* 1 */
-    {352, 211, PT_BEZIERTO, 1, 0}, /* 2 */
+    {352, 211, PT_BEZIERTO, 0, 0}, /* 2 */
     {327, 200, PT_BEZIERTO, 0, 0}, /* 3 */
     {300, 200, PT_BEZIERTO, 0, 0}, /* 4 */
     {245, 200, PT_BEZIERTO, 0, 0}, /* 5 */
@@ -261,16 +261,16 @@ static const path_test_t anglearc_path[] = {
     {200, 300, PT_BEZIERTO, 0, 2}, /* 8 */
     {200, 300, PT_BEZIERTO, 0, 2}, /* 9 */
     {200, 300, PT_BEZIERTO, 0, 2}, /* 10 */
-    {231, 260, PT_LINETO, 1, 0}, /* 11 */
-    {245, 235, PT_BEZIERTO, 1, 1}, /* 12 */
-    {271, 220, PT_BEZIERTO, 0, 1}, /* 13 */
-    {300, 220, PT_BEZIERTO, 0, 1}, /* 14 */
-    {344, 220, PT_BEZIERTO, 0, 1}, /* 15 */
-    {380, 256, PT_BEZIERTO, 0, 1}, /* 16 */
-    {380, 300, PT_BEZIERTO, 0, 1}, /* 17 */
-    {380, 314, PT_BEZIERTO, 0, 1}, /* 18 */
-    {376, 328, PT_BEZIERTO, 0, 1}, /* 19 */
-    {369, 340, PT_BEZIERTO | PT_CLOSEFIGURE, 0, 1}}; /* 20 */
+    {231, 260, PT_LINETO, 0, 0}, /* 11 */
+    {245, 235, PT_BEZIERTO, 0, 0}, /* 12 */
+    {271, 220, PT_BEZIERTO, 0, 0}, /* 13 */
+    {300, 220, PT_BEZIERTO, 0, 0}, /* 14 */
+    {344, 220, PT_BEZIERTO, 0, 0}, /* 15 */
+    {380, 256, PT_BEZIERTO, 0, 0}, /* 16 */
+    {380, 300, PT_BEZIERTO, 0, 0}, /* 17 */
+    {380, 314, PT_BEZIERTO, 0, 0}, /* 18 */
+    {376, 328, PT_BEZIERTO, 0, 0}, /* 19 */
+    {369, 340, PT_BEZIERTO | PT_CLOSEFIGURE, 0, 0}}; /* 20 */
 
 static void test_anglearc(void)
 {
@@ -287,7 +287,7 @@ static void test_anglearc(void)
     CloseFigure(hdc);
     EndPath(hdc);
 
-    ok_path(hdc, "anglearc_path", anglearc_path, sizeof(anglearc_path)/sizeof(path_test_t), 0);
+    ok_path(hdc, "anglearc_path", anglearc_path, sizeof(anglearc_path)/sizeof(path_test_t), 1);
 done:
     ReleaseDC(0, hdc);
 }