networking

external/steamworks/glmgr/cglmbuffer.h

@@ -0,0 +1,91 @@
+//============ Copyright (c) Valve Corporation, All rights reserved. ============
+//
+// cglmprogram.h
+//	GLMgr buffers (index / vertex)
+//	... maybe add PBO later as well
+//===============================================================================
+
+#ifndef CGLMBUFFER_H
+#define	CGLMBUFFER_H
+
+#pragma once
+
+// ext links
+
+// http://www.opengl.org/registry/specs/ARB/vertex_buffer_object.txt
+
+//===============================================================================
+
+// forward declarations
+
+class GLMContext;
+
+enum EGLMBufferType
+{
+	kGLMVertexBuffer,
+	kGLMIndexBuffer,
+	kGLMUniformBuffer,	// for bindable uniform
+	kGLMPixelBuffer,	// for PBO
+	
+	kGLMNumBufferTypes
+};
+
+	// pass this in "options" to constructor to make a dynamic buffer
+#define	GLMBufferOptionDynamic	0x00000001
+
+struct GLMBuffLockParams
+{
+	uint	m_offset;
+	uint	m_size;
+	bool	m_nonblocking;
+	bool	m_discard;
+};
+
+class CGLMBuffer
+{
+
+public:
+	void	Lock( GLMBuffLockParams *params, char **addressOut );
+	void	Unlock( void );
+
+//protected:
+	friend class GLMContext;			// only GLMContext can make CGLMBuffer objects
+	friend class GLMTester;	
+	friend struct IDirect3D9;
+	friend struct IDirect3DDevice9;
+		
+	CGLMBuffer					( GLMContext *ctx, EGLMBufferType type, uint size, uint options );
+	~CGLMBuffer					( );	
+	
+	void	SetModes			( bool asyncMap, bool explicitFlush, bool force = false );
+	void	FlushRange			( uint offset, uint size );
+	
+	GLMContext				*m_ctx;					// link back to parent context
+	EGLMBufferType			m_type;
+	uint					m_size;
+	GLenum					m_buffGLTarget;			// GL_ARRAY_BUFFER_ARB / GL_ELEMENT_BUFFER_ARB	
+	GLuint					m_name;					// name of this program in the context	
+	uint					m_revision;				// bump anytime the size changes or buffer is orphaned
+	bool					m_enableAsyncMap;		// mirror of the buffer state
+	bool					m_enableExplicitFlush;	// mirror of the buffer state
+
+	bool					m_bound;				// true if bound to context		
+	bool					m_mapped;				// is it currently mapped
+	uint					m_dirtyMinOffset;		// when equal, range is empty
+	uint					m_dirtyMaxOffset;
+	
+	float					*m_lastMappedAddress;
+	
+	// --------------------- pseudo-VBO support below here (explicitly for dynamic index buffers)
+	bool					m_pseudo;				// true if the m_name is 0, and the backing is plain RAM
+	
+	// in pseudo mode, there is just one RAM buffer that acts as the backing.
+	// expectation is that this mode would only be used for dynamic indices.
+	// since indices have to be consumed (copied to command stream) prior to return from a drawing call,
+	// there's no need to do any fencing or multibuffering.  orphaning in particular becomes a no-op.
+	
+	char					*m_pseudoBuf;			// storage for pseudo buffer
+};	
+
+
+#endif