Anti-alias toolbar button drop-downs.

Change-Id: Id4eed12f3d4a32b71d00b99e6e82ca7cefb3f8ec
Reviewed-on: https://gerrit.libreoffice.org/63961
Tested-by: Jenkins
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>

1 files changed, 19 insertions, 28 deletions

diff --git a/vcl/source/window/toolbox.cxx b/vcl/source/window/toolbox.cxx
index a5820aff5013..649e4970708d 100644
--- a/vcl/source/window/toolbox.cxx
+++ b/vcl/source/window/toolbox.cxx
@@ -2491,36 +2491,27 @@ static void ImplDrawDropdownArrow(vcl::RenderContext& rRenderContext, const tool
 
     float fScaleFactor = rRenderContext.GetDPIScaleFactor();
 
-    if( !bRotate )
-    {
-        long width = 5 * fScaleFactor;
-        long height = 3 * fScaleFactor;
+    tools::Polygon aPoly(4);
 
-        long x = rDropDownRect.Left() + (rDropDownRect.getWidth() - width)/2;
-        long y = rDropDownRect.Top() + (rDropDownRect.getHeight() - height)/2;
-        while( width >= 1)
-        {
-            rRenderContext.DrawRect( tools::Rectangle( x, y, x+width-1, y ) );
-            y++;
-            x++;
-            width -= 2;
-        }
-    }
-    else
-    {
-        long width = 3 * fScaleFactor;
-        long height = 5 * fScaleFactor;
+    long width = 7 * fScaleFactor;
+    long height = 4 * fScaleFactor;
 
-        long x = rDropDownRect.Left() + (rDropDownRect.getWidth() - width)/2;
-        long y = rDropDownRect.Top() + (rDropDownRect.getHeight() - height)/2;
-        while( height >= 1)
-        {
-            rRenderContext.DrawRect( tools::Rectangle( x, y, x, y+height-1 ) );
-            y++;
-            x++;
-            height -= 2;
-        }
-    }
+    long x = rDropDownRect.Left() + (rDropDownRect.getWidth() - width)/2;
+    long y = rDropDownRect.Top() + (rDropDownRect.getHeight() - height)/2;
+
+    long halfwidth = (width+1)>>1;
+    aPoly.SetPoint(Point(x, y), 0);
+    aPoly.SetPoint(Point(x + halfwidth, y + height), 1);
+    aPoly.SetPoint(Point(x + halfwidth*2, y), 2);
+    aPoly.SetPoint(Point(x, y), 3);
+
+    if (bRotate) // TESTME: harder ...
+        aPoly.Rotate(Point(x,y+height/2),2700);
+
+    auto aaflags = rRenderContext.GetAntialiasing();
+    rRenderContext.SetAntialiasing(AntialiasingFlags::EnableB2dDraw);
+    rRenderContext.DrawPolygon( aPoly );
+    rRenderContext.SetAntialiasing(aaflags);
 
     if( bFillColor )
         rRenderContext.SetFillColor(aOldFillColor);