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.

2 files changed, 5 insertions, 0 deletions

diff --git a/qt/ScintillaEditBase/PlatQt.cpp b/qt/ScintillaEditBase/PlatQt.cpp
index ce6f0313b..6a26d47c4 100644
--- a/qt/ScintillaEditBase/PlatQt.cpp
+++ b/qt/ScintillaEditBase/PlatQt.cpp
@@ -612,6 +612,10 @@ void SurfaceImpl::SetBidiR2L(bool)
 {
 }
 
+void SurfaceImpl::FlushDrawing()
+{
+}
+
 QPaintDevice *SurfaceImpl::GetPaintDevice()
 {
 	return device;
diff --git a/qt/ScintillaEditBase/PlatQt.h b/qt/ScintillaEditBase/PlatQt.h
index 4069898ff..c690e7697 100644
--- a/qt/ScintillaEditBase/PlatQt.h
+++ b/qt/ScintillaEditBase/PlatQt.h
@@ -135,6 +135,7 @@ public:
 	void SetClip(PRectangle rc) override;
 	void PopClip() override;
 	void FlushCachedState() override;
+	void FlushDrawing() override;
 
 	void SetUnicodeMode(bool unicodeMode_) override;
 	void SetDBCSMode(int codePage_) override;