From 35b4fef38ec21bd77c493374bc72deabfb9960de Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Tue, 17 Jan 2006 01:24:40 +0000
Subject: [PATCH] add concurrent rendering hooks

---
 stepmania/src/RageDisplay.h                       |  5 +++++
 stepmania/src/RageDisplay_OGL.cpp                 | 15 +++++++++++++++
 stepmania/src/RageDisplay_OGL.h                   |  4 ++++
 .../src/arch/LowLevelWindow/LowLevelWindow.h      |  4 ++++
 4 files changed, 28 insertions(+)

diff --git a/stepmania/src/RageDisplay.h b/stepmania/src/RageDisplay.h
index 2263416c63..0f6328594b 100644
--- a/stepmania/src/RageDisplay.h
+++ b/stepmania/src/RageDisplay.h
@@ -157,6 +157,11 @@ public:
 	virtual bool SupportsThreadedRendering() { return false; }
 	virtual bool SupportsPerVertexMatrixScale() = 0;
 
+	// If threaded rendering is supported, these will be called from the rendering
+	// thread before and after rendering.
+	virtual void BeginConcurrentRendering() { }
+	virtual void EndConcurrentRendering() { }
+
 	/* return 0 if failed or internal texture resource handle 
 	 * (unsigned in OpenGL, texture pointer in D3D) */
 	virtual unsigned CreateTexture( 
diff --git a/stepmania/src/RageDisplay_OGL.cpp b/stepmania/src/RageDisplay_OGL.cpp
index 106678dfdd..cfab73257d 100644
--- a/stepmania/src/RageDisplay_OGL.cpp
+++ b/stepmania/src/RageDisplay_OGL.cpp
@@ -1606,6 +1606,21 @@ const RageDisplay::PixelFormatDesc *RageDisplay_OGL::GetPixelFormatDesc(PixelFor
 	return &PIXEL_FORMAT_DESC[pf];
 }
 
+bool RageDisplay_OGL::SupportsThreadedRendering()
+{
+	return g_pWind->SupportsThreadedRendering();
+}
+
+void RageDisplay_OGL::BeginConcurrentRendering()
+{
+	g_pWind->BeginConcurrentRendering();
+}
+
+void RageDisplay_OGL::EndConcurrentRendering()
+{
+	g_pWind->EndConcurrentRendering();
+}
+
 void RageDisplay_OGL::DeleteTexture( unsigned uTexHandle )
 {
 	unsigned int uTexID = uTexHandle;
diff --git a/stepmania/src/RageDisplay_OGL.h b/stepmania/src/RageDisplay_OGL.h
index 6395698626..112b7ce30a 100644
--- a/stepmania/src/RageDisplay_OGL.h
+++ b/stepmania/src/RageDisplay_OGL.h
@@ -15,6 +15,10 @@ public:
 	void ResolutionChanged();
 	const PixelFormatDesc *GetPixelFormatDesc(PixelFormat pf) const;
 
+	bool SupportsThreadedRendering();
+	void BeginConcurrentRendering();
+	void EndConcurrentRendering();
+
 	bool BeginFrame();	
 	void EndFrame();
 	VideoModeParams GetActualVideoModeParams() const;
diff --git a/stepmania/src/arch/LowLevelWindow/LowLevelWindow.h b/stepmania/src/arch/LowLevelWindow/LowLevelWindow.h
index 69c7bf82db..47e3d7e352 100644
--- a/stepmania/src/arch/LowLevelWindow/LowLevelWindow.h
+++ b/stepmania/src/arch/LowLevelWindow/LowLevelWindow.h
@@ -25,6 +25,10 @@ public:
 	virtual void Update() { }
 
 	virtual VideoModeParams GetActualVideoModeParams() const = 0;
+
+	virtual bool SupportsThreadedRendering() { return false; }
+	virtual void BeginConcurrentRendering() { }
+	virtual void EndConcurrentRendering() { }
 };
 
 #endif