/*--------------------------------------------------------------------------*/
UCHAR *GenericSvgaScreen::GetVideoAddress(void)
{
#if defined(DOUBLE_BUFFER) && !defined(LOCAL_BUFFERING)
UCHAR* pMem = GetFrameBufferAddress( mwHRes * mwVRes * 2 );
#else
UCHAR* pMem = GetFrameBufferAddress( mwHRes * mwVRes );
#endif
#ifdef DPMI_API_DJGPP
int ret = __djgpp_nearptr_enable();
if (ret != 0)
{
return NULL;
}
else
{
return NULL;
}
__djgpp_nearptr_disable();
#endif
#ifdef DOUBLE_BUFFER
# ifdef LOCAL_BUFFERING
mpTargetMem = pMem;
pMem = new UCHAR[mwHRes * mwVRes];
# else
pMem += mwHRes * mwVRes;
# endif
#endif
return pMem;
}
/*********************************************************************
* Function: WORD GOLDraw()
*
* PreCondition: none
*
* Input: none
*
* Output: non-zero if drawing is complete
*
* Side Effects: none
*
* Overview: redraws objects in the current linked list
*
* Note: none
*
********************************************************************/
WORD GOLDraw(void)
{
static OBJ_HEADER *pCurrentObj = NULL;
SHORT done;
#ifdef USE_DOUBLE_BUFFERING
static BYTE DisplayUpdated = 0;
if(IsDisplayUpdatePending())
{
return 0;
}
#endif // USE_DOUBLE_BUFFERING
if(pCurrentObj == NULL)
{
if(GOLDrawCallback())
{
#ifdef USE_DOUBLE_BUFFERING
#ifdef USE_TRANSITION_EFFECTS
if(TransitionPendingStatus)
{
TransitionPendingStatus = 0;
while(IsDisplayUpdatePending());
GFXExecutePendingTransition(GetDrawBufferAddress(), GetFrameBufferAddress());
}
#endif
#endif //USE_DOUBLE_BUFFERING
// It's last object jump to head
pCurrentObj = _pGolObjects;
#ifdef USE_DOUBLE_BUFFERING
if(DisplayUpdated)
{
RequestDisplayUpdate();
DisplayUpdated = 0;
return(0);
}
#endif //USE_DOUBLE_BUFFERING
}
else
{
return (0); // drawing is not done
}
}
done = 0;
while(pCurrentObj != NULL)
{
if(IsObjUpdated(pCurrentObj))
{
done = pCurrentObj->DrawObj(pCurrentObj);
if(done)
{
GOLDrawComplete(pCurrentObj);
#ifdef USE_DOUBLE_BUFFERING
InvalidateRectangle(pCurrentObj->left, pCurrentObj->top,
pCurrentObj->right, pCurrentObj->bottom);
DisplayUpdated = 1;
#endif //USE_DOUBLE_BUFFERING
}
else
{
return (0); // drawing is not done
}
}
pCurrentObj = (OBJ_HEADER *)pCurrentObj->pNxtObj;
}
#if defined(USE_TRANSITION_EFFECTS) && defined(USE_DOUBLE_BUFFERING)
TransitionPendingStatus = GFXIsTransitionPending();
InvalidateAll(); //If needed, invalidate only the transition rectangle instead
#endif
return (1); // drawing is completed
}
