Add an explicit FlushDrawing method to Surface that should be called after

completing a bitmap. Currently only has a real implementation on Direct2D.
Avoiding implicit flushes inside Copy and FillRectangle produced a 23% speed
improvement on files with about 1 indentation guide per line as the drawing
pipeline was being flushed for each indentation guide.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/MarginView.cxx b/src/MarginView.cxx
index fbe3488c0..4d040776d 100644
--- a/src/MarginView.cxx
+++ b/src/MarginView.cxx
@@ -172,6 +172,8 @@ void MarginView::RefreshPixMaps(Surface *surfaceWindow, WindowID wid, const View
 				pixmapSelPatternOffset1->FillRectangle(rcPixel, colourFMFill);
 			}
 		}
+		pixmapSelPattern->FlushDrawing();
+		pixmapSelPatternOffset1->FlushDrawing();
 	}
 }