pcsx2/plugins/GSdx/GSDrawingContext.h

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/*
* Copyright (C) 2007-2009 Gabest
* http://www.gabest.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#pragma once
#include "GS.h"
#include "GSLocalMemory.h"
#pragma pack(push, 1)
__declspec(align(16)) class GSDrawingContext
{
public:
GIFRegXYOFFSET XYOFFSET;
GIFRegTEX0 TEX0;
GIFRegTEX1 TEX1;
GIFRegTEX2 TEX2;
GIFRegCLAMP CLAMP;
GIFRegMIPTBP1 MIPTBP1;
GIFRegMIPTBP2 MIPTBP2;
GIFRegSCISSOR SCISSOR;
GIFRegALPHA ALPHA;
GIFRegTEST TEST;
GIFRegFBA FBA;
GIFRegFRAME FRAME;
GIFRegZBUF ZBUF;
__declspec(align(16)) struct
{
GSVector4i dx10;
GSVector4 dx9;
GSVector4 in;
GSVector4 ex;
} scissor;
GSDrawingContext()
{
Reset();
}
void Reset()
{
memset(&XYOFFSET, 0, sizeof(XYOFFSET));
memset(&TEX0, 0, sizeof(TEX0));
memset(&TEX1, 0, sizeof(TEX1));
memset(&TEX2, 0, sizeof(TEX2));
memset(&CLAMP, 0, sizeof(CLAMP));
memset(&MIPTBP1, 0, sizeof(MIPTBP1));
memset(&MIPTBP2, 0, sizeof(MIPTBP2));
memset(&SCISSOR, 0, sizeof(SCISSOR));
memset(&ALPHA, 0, sizeof(ALPHA));
memset(&TEST, 0, sizeof(TEST));
memset(&FBA, 0, sizeof(FBA));
memset(&FRAME, 0, sizeof(FRAME));
memset(&ZBUF, 0, sizeof(ZBUF));
}
void UpdateScissor()
{
scissor.dx10 = GSVector4i(
(int)((SCISSOR.SCAX0 << 4) + XYOFFSET.OFX),
(int)((SCISSOR.SCAY0 << 4) + XYOFFSET.OFY),
(int)((SCISSOR.SCAX1 << 4) + XYOFFSET.OFX),
(int)((SCISSOR.SCAY1 << 4) + XYOFFSET.OFY));
scissor.dx9 = GSVector4(scissor.dx10);
scissor.in = GSVector4(
(int)SCISSOR.SCAX0,
(int)SCISSOR.SCAY0,
(int)SCISSOR.SCAX1 + 1,
(int)SCISSOR.SCAY1 + 1);
scissor.ex = GSVector4(
(int)SCISSOR.SCAX0,
(int)SCISSOR.SCAY0,
(int)SCISSOR.SCAX1,
(int)SCISSOR.SCAY1);
}
bool DepthRead() const
{
return TEST.ZTE && TEST.ZTST >= 2;
}
bool DepthWrite() const
{
if(TEST.ATE && TEST.ATST == ATST_NEVER && TEST.AFAIL != AFAIL_ZB_ONLY) // alpha test, all pixels fail, z buffer is not updated
{
return false;
}
return ZBUF.ZMSK == 0 && TEST.ZTE != 0; // ZTE == 0 is bug on the real hardware, write is blocked then
}
};
#pragma pack(pop)