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, 4 insertions, 0 deletions

diff --git a/cocoa/PlatCocoa.h b/cocoa/PlatCocoa.h
index 8f959014b..1ddb203c7 100644
--- a/cocoa/PlatCocoa.h
+++ b/cocoa/PlatCocoa.h
@@ -120,6 +120,7 @@ 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;
diff --git a/cocoa/PlatCocoa.mm b/cocoa/PlatCocoa.mm
index f5f69608e..2e3ab2d57 100644
--- a/cocoa/PlatCocoa.mm
+++ b/cocoa/PlatCocoa.mm
@@ -1294,6 +1294,9 @@ void SurfaceImpl::SetDBCSMode(int codePage_) {
 void SurfaceImpl::SetBidiR2L(bool) {
 }
 
+void SurfaceImpl::FlushDrawing() {
+}
+
 std::unique_ptr<Surface> Surface::Allocate(int) {
 	return std::make_unique<SurfaceImpl>();
 }