72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
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//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef HARDWAREMATRIXSTATE_H
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#define HARDWAREMATRIXSTATE_H
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#pragma once
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// This emulates the hardware matrix palette and keeps up with
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// matrix usage, LRU's matrices, etc.
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class CHardwareMatrixState
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{
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public:
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CHardwareMatrixState();
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void Init( int numHardwareMatrices );
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// return false if there is no slot for this matrix.
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bool AllocateMatrix( int globalMatrixID );
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// deallocate the least recently used matrix
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void DeallocateLRU( void );
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void DeallocateLRU( int n );
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// return true if a matrix is allocate.
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bool IsMatrixAllocated( int globalMatrixID ) const;
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// flush usage flags - signifies that none of the matrices are being used in the current strip
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// do this when starting a new strip.
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void SetAllUnused();
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void DeallocateAll();
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// save the complete state of the hardware matrices
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void SaveState();
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// restore the complete state of the hardware matrices
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void RestoreState();
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// Returns the number of free + unsed matrices
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int AllocatedMatrixCount() const;
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int FreeMatrixCount() const;
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int GetNthBoneGlobalID( int n ) const;
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void DumpState( void );
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private:
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int FindHardwareMatrix( int globalMatrixID );
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int FindLocalLRUIndex( void );
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// Increment and return LRU counter.
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struct MatrixState_t
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{
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bool allocated;
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int lastUsageID;
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int globalMatrixID;
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};
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int m_LRUCounter;
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int m_NumMatrices;
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int m_AllocatedMatrices;
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MatrixState_t *m_matrixState;
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MatrixState_t *m_savedMatrixState;
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};
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#endif // HARDWAREMATRIXSTATE_H
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