115 lines
2.6 KiB
C
115 lines
2.6 KiB
C
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/*==========================================================================;
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*
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* Copyright (C) 1997 Microsoft Corporation. All Rights Reserved.
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*
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* File: d3dmem.h
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* Content: Direct3D memory access include file
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*
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***************************************************************************/
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#ifndef _D3DMEM_H_
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#define _D3DMEM_H_
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#include "vbuffer.hpp"
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class CD3DHal;
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/*
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* Register a set of functions to be used in place of malloc
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* and free for memory allocation. The functions D3DMalloc
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* and D3DFree will use these functions. The default is to use the
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* ANSI C library routines malloc and free.
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*/
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typedef LPVOID (*D3DMALLOCFUNCTION)(size_t);
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typedef VOID (*D3DFREEFUNCTION)(LPVOID);
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/*
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* Allocate size bytes of memory and return a pointer to it in *p_return.
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* Returns D3DERR_BADALLOC with *p_return unchanged if the allocation fails.
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*/
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HRESULT D3DAPI D3DMalloc(LPVOID* p_return, size_t size);
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/*
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* Free a block of memory previously allocated with D3DMalloc
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*/
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VOID D3DAPI D3DFree(LPVOID p);
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HRESULT MallocAligned(void** p_return, size_t size);
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void FreeAligned(void* p);
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#define __USEGLOBALNEWANDDELETE
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#ifndef __USEGLOBALNEWANDDELETE
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/* Base class for all D3D classes to use our special allocation functions everywhere */
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class CD3DAlloc
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{
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public:
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void* operator new(size_t s) const
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{
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void *p;
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MallocAligned(&p,s);
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return p;
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};
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void operator delete(void* p) const
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{
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FreeAligned(p);
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};
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};
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#define D3DNEW CD3DAlloc::new
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#define D3DDELETE CD3DAlloc::delete
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#else
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void* operator new(size_t s);
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void operator delete(void* p);
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#define D3DNEW ::new
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#define D3DDELETE ::delete
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#endif
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//---------------------------------------------------------------------
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// This class manages growing buffer, aligned to 32 byte boundary
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// Number if bytes should be power of 2.
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// D3DMalloc is used to allocate memory
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//
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class CAlignedBuffer32
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{
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public:
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CAlignedBuffer32()
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{
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size = 0;
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allocatedBuf = 0;
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alignedBuf = 0;
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}
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~CAlignedBuffer32()
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{
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if (allocatedBuf)
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D3DFree(allocatedBuf);
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}
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// Returns aligned buffer address
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LPVOID GetAddress()
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{
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return alignedBuf;
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}
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// Returns aligned buffer size
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DWORD GetSize()
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{
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return size;
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}
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HRESULT Grow(DWORD dwSize);
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HRESULT CheckAndGrow(DWORD dwSize)
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{
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if (dwSize > size)
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return Grow(dwSize + 1024);
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else
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return D3D_OK;
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}
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protected:
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LPVOID allocatedBuf;
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LPVOID alignedBuf;
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DWORD size;
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};
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// Forward declarations
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class CD3DHal;
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class CD3DHalDP2;
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#endif //_D3DMEM_H_
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