Serious-Engine/Sources/Engine/Graphics/Raster.cpp

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2016-03-11 14:57:17 +01:00
/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
#include "stdh.h"
#include <Engine/Graphics/Raster.h>
#include <Engine/Base/ListIterator.inl>
#include <Engine/Graphics/DrawPort.h>
#include <Engine/Graphics/GfxLibrary.h>
/*
* Raster functions
*/
CRaster::CRaster(PIX ulWidth, PIX ulHeight, ULONG ulFlags) : ra_MainDrawPort()
{
// remember width and height
ra_Width = ulWidth;
ra_Height = ulHeight;
// clear uninitialized fields
ra_LockCount = 0;
// set flags
ra_Flags = ulFlags;
// add main drawport to list
ASSERT( ra_DrawPortList.IsEmpty());
ra_DrawPortList.AddTail(ra_MainDrawPort.dp_NodeInRaster);
ra_MainDrawPort.dp_Raster = this;
ra_pvpViewPort = NULL;
// when all is initialized correct the drawport dimensions
RecalculateDrawPortsDimensions();
}
CRaster::~CRaster(void)
{
// remove main drawport from list of drawports
ra_MainDrawPort.dp_NodeInRaster.Remove();
// remove all other drawports in this raster
FORDELETELIST(CDrawPort, dp_NodeInRaster, ra_DrawPortList, litdp) {
// and delete each one
delete &litdp.Current();
}
// raster must be unlocked before destroying it
ASSERT(ra_LockCount==0);
}
/* Recalculate dimensions for all drawports. */
void CRaster::RecalculateDrawPortsDimensions(void)
{
// for all drawports in this raster
FOREACHINLIST(CDrawPort, dp_NodeInRaster, ra_DrawPortList, litdp) {
// recalculate dimensions to fit new size of raster
litdp.Current().RecalculateDimensions();
}
}
/*
* Lock for drawing.
*/
BOOL CRaster::Lock()
{
ASSERT( this!=NULL);
ASSERT( ra_LockCount>=0);
// if raster size is too small in some axis
if( ra_Width<1 || ra_Height<1) {
// do not allow locking
ASSERTALWAYS( "Raster size to small to be locked!");
return FALSE;
}
// if allready locked
if( ra_LockCount>0) {
// just increment counter
ra_LockCount++;
return TRUE;
}
// if not already locked
else {
// try to lock with driver
BOOL bLocked = _pGfx->LockRaster(this);
// if succeeded in locking
if( bLocked) {
// set the counter to 1
ra_LockCount = 1;
return TRUE;
}
// lock not ok
return FALSE;
}
}
/*
* Unlock after drawing.
*/
void CRaster::Unlock()
{
ASSERT( this!=NULL);
ASSERT( ra_LockCount>0);
// decrement counter
ra_LockCount--;
// if reached zero
if( ra_LockCount==0 ) {
// unlock it with driver
_pGfx->UnlockRaster(this);
}
}
/*****
* Change Raster size.
*/
void CRaster::Resize( PIX pixWidth, PIX pixHeight)
{
ASSERT( pixWidth>0 && pixHeight>0);
if( pixWidth <=0) pixWidth = 1;
if( pixHeight<=0) pixHeight = 1;
ra_Width = pixWidth;
ra_Height = pixHeight;
RecalculateDrawPortsDimensions();
}