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44 lines
1.5 KiB
44 lines
1.5 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $Revision: $ |
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// $NoKeywords: $ |
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// |
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// This file contains a little interface to deal with pooled vertex buffer allocations |
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// (which is used to allow multiple meshes to own sub-ranges within a single vertex buffer) |
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// |
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//=============================================================================// |
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#ifndef IPOOLEDVBALLOCATOR_H |
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#define IPOOLEDVBALLOCATOR_H |
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//----------------------------------------------------------------------------- |
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// Pooled VB allocator abstract base class |
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//----------------------------------------------------------------------------- |
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abstract_class IPooledVBAllocator |
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{ |
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public: |
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virtual ~IPooledVBAllocator() {}; |
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// Allocate the shared vertex buffer |
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virtual bool Init( VertexFormat_t format, int numVerts ) = 0; |
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// Free the shared vertex buffer (after Deallocate is called for all sub-allocs) |
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virtual void Clear() = 0; |
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// Get the shared mesh (vertex buffer) from which sub-allocations are made |
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virtual IMesh *GetSharedMesh() = 0; |
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// Get a pointer to the start of the vertex buffer data |
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virtual void *GetVertexBufferBase() = 0; |
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virtual int GetNumVertsAllocated() = 0; |
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// Allocate a sub-range of 'numVerts' from free space in the shared vertex buffer |
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// (returns the byte offset from the start of the VB to the new allocation) |
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virtual int Allocate( int numVerts ) = 0; |
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virtual void Deallocate( int offset, int numVerts ) = 0; |
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}; |
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#endif // IPOOLEDVBALLOCATOR_H
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