pcsx2/plugins/GSdx/GSDrawingContext.h

119 lines
2.9 KiB
C++

/*
* 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#pragma once
#include "GS.h"
#include "GSLocalMemory.h"
__aligned(class, 32) 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;
struct
{
GSVector4 in;
GSVector4 ofex;
uint32 ofxy;
} scissor;
struct
{
GSOffset* fb;
GSOffset* zb;
GSOffset* tex;
GSPixelOffset* fzb;
GSPixelOffset4* fzb4;
} offset;
GSDrawingContext()
{
memset(&offset, 0, sizeof(offset));
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.ofex = GSVector4(
(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.in = GSVector4(
(int)SCISSOR.SCAX0,
(int)SCISSOR.SCAY0,
(int)SCISSOR.SCAX1 + 1,
(int)SCISSOR.SCAY1 + 1);
uint16 ofx = (uint16)XYOFFSET.OFX - 15;
uint16 ofy = (uint16)XYOFFSET.OFY - 15;
scissor.ofxy = ((ofy << 16) | ofx); // ceil(xy) => (xy - offset + 15) >> 4 => (xy - [offset - 15]) >> 4
}
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
}
};