150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
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/****************************************************************************
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DVA.H
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Copyright (c) 1993 Microsoft Corporation
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DVA 1.0 Interface Definitions
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***************************************************************************/
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#ifndef _INC_DVA
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#define _INC_DVA
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#ifdef __cplusplus
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#define __inline inline
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extern "C" {
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#endif
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/****************************************************************************
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***************************************************************************/
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#include "dvaddi.h" // interface to the display driver
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/****************************************************************************
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***************************************************************************/
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typedef DVASURFACEINFO FAR *PDVA;
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typedef PDVA HDVA;
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/****************************************************************************
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***************************************************************************/
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//
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// this code in biCompression means the frame buffer must be accesed via
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// 48 bit pointers! using *ONLY* the given selector
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//
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// BI_1632 has bitmasks (just like BI_BITFIELDS) for biBitCount == 16,24,32
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//
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#ifndef BI_1632
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#define BI_1632 0x32333631 // '1632'
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#endif
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#ifndef BI_BITFIELDS
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#define BI_BITFIELDS 3
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#endif
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/****************************************************************************
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***************************************************************************/
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#if defined(_INC_VFW) || defined(_INC_DRAWDIB)
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//
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// this API is in MSVIDEO.DLL
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//
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BOOL VFWAPI DVAGetSurface(HDC hdc, int nSurface, DVASURFACEINFO FAR *lpSurfaceInfo);
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#else
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//
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// this API uses the Escape to the display driver only
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//
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__inline BOOL DVAGetSurface(HDC hdc, int nSurface, DVASURFACEINFO FAR *pdva)
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{
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int i;
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i = Escape(hdc, DVAGETSURFACE,sizeof(int),(LPCSTR)&nSurface,(LPVOID)pdva);
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return i > 0;
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}
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#endif
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/****************************************************************************
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***************************************************************************/
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__inline PDVA DVAOpenSurface(HDC hdc, int nSurface)
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{
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PDVA pdva;
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pdva = (PDVA)GlobalLock(GlobalAlloc(GHND|GMEM_SHARE, sizeof(DVASURFACEINFO)));
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if (pdva == NULL)
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return NULL;
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if (!DVAGetSurface(hdc, nSurface, pdva) ||
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!pdva->OpenSurface(pdva->lpSurface))
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{
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GlobalFree((HGLOBAL)SELECTOROF(pdva));
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return NULL;
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}
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return pdva;
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}
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/****************************************************************************
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***************************************************************************/
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__inline void DVACloseSurface(PDVA pdva)
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{
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if (pdva == NULL)
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return;
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pdva->CloseSurface(pdva->lpSurface);
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GlobalFree((HGLOBAL)SELECTOROF(pdva));
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}
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/****************************************************************************
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***************************************************************************/
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__inline BOOL DVABeginAccess(PDVA pdva, int x, int y, int dx, int dy)
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{
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return pdva->BeginAccess(pdva->lpSurface, x, y, dx, dy);
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}
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/****************************************************************************
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***************************************************************************/
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__inline void DVAEndAccess(PDVA pdva)
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{
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pdva->EndAccess(pdva->lpSurface);
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}
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/****************************************************************************
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***************************************************************************/
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__inline LPBITMAPINFOHEADER DVAGetSurfaceFmt(PDVA pdva)
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{
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if (pdva == NULL)
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return NULL;
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return &pdva->BitmapInfo;
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}
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/****************************************************************************
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***************************************************************************/
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__inline LPVOID DVAGetSurfacePtr(PDVA pdva)
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{
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if (pdva == NULL)
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return NULL;
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return (LPVOID)MAKELONG(pdva->offSurface, pdva->selSurface);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif // _INC_DVA
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