ddsurf.c File Reference

#include <dxg_int.h>

Include dependency graph for ddsurf.c:

Go to the source code of this file.

Functions
DWORD NTAPI	DxDdLock (HANDLE hSurface, PDD_LOCKDATA puLockData, HDC hdcClip)
DWORD NTAPI	DxDdUnlock (HANDLE hSurface, PDD_UNLOCKDATA puUnlockData)

Function Documentation

DxDdLock()

DWORD NTAPI DxDdLock	(	HANDLE	hSurface,
		PDD_LOCKDATA	puLockData,
		HDC	hdcClip
	)

Definition at line 36 of file ddsurf.c.

{
    PEDD_SURFACE pSurface;
    PEDD_DIRECTDRAW_LOCAL peDdL;
    PEDD_DIRECTDRAW_GLOBAL peDdGl;
    DD_MAPMEMORYDATA mapMemoryData;
 
    pSurface = (PEDD_SURFACE)DdHmgLock(hSurface, ObjType_DDSURFACE_TYPE, TRUE);
    peDdL = pSurface->peDirectDrawLocal;
    peDdGl = peDdL->peDirectDrawGlobal2;
 
    // Map memory if it's not already mapped and driver function is provided
    if (!peDdL->isMemoryMapped && (peDdGl->ddCallbacks.dwFlags & DDHAL_CB32_MAPMEMORY))
    {
        mapMemoryData.bMap = 1;
        mapMemoryData.hProcess = (HANDLE)-1;
        mapMemoryData.fpProcess = 0;
        mapMemoryData.lpDD = (PDD_DIRECTDRAW_GLOBAL)peDdGl;
 
        peDdGl->ddCallbacks.MapMemory(&mapMemoryData);
 
        if (!mapMemoryData.ddRVal)
        {
            peDdL->isMemoryMapped = 1;
            peDdL->fpProcess2 = mapMemoryData.fpProcess;
        }
    }
 
    if (pSurface)
    {
        InterlockedExchangeAdd((LONG*)&pSurface->pobj.cExclusiveLock, 0xFFFFFFFF);
    }
 
    puLockData->ddRVal = DD_OK;
 
    return DDHAL_DRIVER_HANDLED;
}

DxDdUnlock()

DWORD NTAPI DxDdUnlock	(	HANDLE	hSurface,
		PDD_UNLOCKDATA	puUnlockData
	)

Definition at line 96 of file ddsurf.c.

{
    puUnlockData->ddRVal = DD_OK;
 
    return DDHAL_DRIVER_HANDLED;
}