gdiplus: Fix rectangles of horizontal and vertical gradients.

dlls/gdiplus/brush.c

@@ -261,6 +261,17 @@ GpStatus WINGDIPAPI GdipCreateLineBrush(GDIPCONST GpPointF* startpoint,
     (*line)->rect.Width  = fabs(startpoint->X - endpoint->X);
     (*line)->rect.Height = fabs(startpoint->Y - endpoint->Y);
 
+    if ((*line)->rect.Width == 0)
+    {
+        (*line)->rect.X -= (*line)->rect.Height / 2.0f;
+        (*line)->rect.Width = (*line)->rect.Height;
+    }
+    else if ((*line)->rect.Height == 0)
+    {
+        (*line)->rect.Y -= (*line)->rect.Width / 2.0f;
+        (*line)->rect.Height = (*line)->rect.Width;
+    }
+
     (*line)->blendcount = 1;
     (*line)->blendfac = GdipAlloc(sizeof(REAL));
     (*line)->blendpos = GdipAlloc(sizeof(REAL));

dlls/gdiplus/tests/brush.c

@@ -310,9 +310,9 @@ static void test_gradientgetrect(void)
     memset(&rectf, 0, sizeof(GpRectF));
     status = GdipGetLineRect(brush, &rectf);
     expect(Ok, status);
-    todo_wine expectf(-5.0, rectf.X);
+    expectf(-5.0, rectf.X);
     expectf(0.0, rectf.Y);
-    todo_wine expectf(10.0, rectf.Width);
+    expectf(10.0, rectf.Width);
     expectf(10.0, rectf.Height);
     status = GdipDeleteBrush((GpBrush*)brush);
     /* horizontal gradient */
@@ -324,9 +324,9 @@ static void test_gradientgetrect(void)
     status = GdipGetLineRect(brush, &rectf);
     expect(Ok, status);
     expectf(0.0, rectf.X);
-    todo_wine expectf(-5.0, rectf.Y);
+    expectf(-5.0, rectf.Y);
     expectf(10.0, rectf.Width);
-    todo_wine expectf(10.0, rectf.Height);
+    expectf(10.0, rectf.Height);
     status = GdipDeleteBrush((GpBrush*)brush);
     /* slope = -1 */
     pt1.X = pt1.Y = 0.0;