/////////////////////////////////////////////////////
/////////////////////////////////////////////////////
//
//		            ResolveMultiSampling
//
/////////////////////////////////////////////////////
/////////////////////////////////////////////////////
#include "stdafx.h"
#include "CKRasterizer.h"

CKERROR CreateResolveMultisamplingProto(CKBehaviorPrototype **);
int ResolveMultisampling(const CKBehaviorContext& behcontext);


// input parameters
enum 
{
	InParam_ResolveColorBuffer = 0,
	InParam_ResolveDepthStencilBuffer,	
};


CKObjectDeclaration	*FillBehaviorResolveMultisampling()
{

	CKObjectDeclaration *od = CreateCKObjectDeclaration("Resolve Multisampling");
	od->SetDescription("Force a multisampled framebuffer resolve until next SwapBuffer. Necessary for a StretchRect operation");	
	od->SetCategory("Shaders/General");
	od->SetType(CKDLL_BEHAVIORPROTOTYPE);
	od->SetGuid(CKGUID(0x664457d3, 0x19327722));
	od->SetAuthorGuid(CKGUID());
	od->SetAuthorName("Virtools");
	od->SetVersion(0x00010000);
	od->SetCreationFunction(CreateResolveMultisamplingProto);
	return od;
}

CKERROR CreateResolveMultisamplingProto(CKBehaviorPrototype **pproto)
{
	CKBehaviorPrototype *proto = CreateCKBehaviorPrototype("Resolve Multisampling");
	if(!proto) return CKERR_OUTOFMEMORY;

	proto->DeclareInput("In");

	proto->DeclareInParameter("Resolve Color Buffer",	 CKPGUID_BOOL,	"TRUE" );	
	proto->DeclareInParameter("Resolve Depth Stencil Buffer",	 CKPGUID_BOOL,	"FALSE" );


	proto->DeclareOutput("Out");
	proto->DeclareOutput("Error");
	
	proto->SetFlags(CK_BEHAVIORPROTOTYPE_NORMAL);
	proto->SetFunction(ResolveMultisampling);
	proto->SetBehaviorFlags(CKBEHAVIOR_TARGETABLE);

	*pproto = proto;
	return CK_OK;

}



int ResolveMultisampling(const CKBehaviorContext& behcontext)
{
	CKBehavior* beh = behcontext.Behavior;
	beh->ActivateInput(0,FALSE);
	//
	CKRasterizerContext* rsctx = behcontext.CurrentRenderContext->GetRasterizerContext();
	if (!rsctx)
	{
		beh->ActivateOutput(0);	
		return CKBR_OK;
	}
	//
	if (rsctx->m_Antialias != 0 && rsctx->m_OffscreenMultiSampleCount == 0)
	{
		beh->m_Context->OutputToConsole("Resolve Multisampling error: This BB requires an offscreen multisampled framebuffer, and a non multisampled main backbuffer.\n"
			                            "Please set the 'CK2_3D/OffscreenMultisampledBuffer' variable to 'TRUE' to activate such configuration.");
		beh->ActivateOutput(1);	
	}
	else
	{
		CKBOOL resolveColorBuffer = TRUE;
		CKBOOL resolveDepthStencilBuffer = FALSE;
		beh->GetInputParameterValue(InParam_ResolveColorBuffer, &resolveColorBuffer);
		beh->GetInputParameterValue(InParam_ResolveDepthStencilBuffer, &resolveDepthStencilBuffer);
		rsctx->ResolveMultisampling(resolveColorBuffer, resolveDepthStencilBuffer);	
		beh->ActivateOutput(0);	
	}
	return CKBR_OK;
	
}