pcsx2/plugins/GSdx/GSRendererSW.h

/* 
 *	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 "GSRenderer.h"
#include "GSTextureCacheSW.h"
#include "GSDrawScanline.h"

extern const GSVector4 g_pos_scale;

template <class Device>
class GSRendererSW : public GSRendererT<Device, GSVertexSW>
{
protected:
	GSRasterizerList m_rl;
	GSTextureCacheSW* m_tc;
	GSVertexTrace m_vtrace;
	Texture m_texture[2];
	bool m_reset;

	void Reset() 
	{
		// TODO: GSreset can come from the main thread too => crash
		// m_tc->RemoveAll();

		m_reset = true;

		__super::Reset();
	}

	void VSync(int field)
	{
		__super::VSync(field);

		m_tc->IncAge();

		if(m_reset)
		{
			m_tc->RemoveAll();

			m_reset = false;
		}

		// if((m_perfmon.GetFrame() & 255) == 0) m_rl.PrintStats();
	}

	void ResetDevice() 
	{
		m_texture[0] = Texture();
		m_texture[1] = Texture();
	}

	bool GetOutput(int i, Texture& t)
	{
		CRect r(0, 0, DISPFB[i]->FBW * 64, GetFrameRect(i).bottom);

		// TODO: round up bottom

		if(m_texture[i].GetWidth() != r.Width() || m_texture[i].GetHeight() != r.Height())
		{
			m_texture[i] = Texture();
		}

		if(!m_texture[i] && !m_dev.CreateTexture(m_texture[i], r.Width(), r.Height())) 
		{
			return false;
		}

		GIFRegTEX0 TEX0;

		TEX0.TBP0 = DISPFB[i]->Block();
		TEX0.TBW = DISPFB[i]->FBW;
		TEX0.PSM = DISPFB[i]->PSM;

		GIFRegCLAMP CLAMP;

		CLAMP.WMS = CLAMP.WMT = 1;

		// TODO
		static BYTE* buff = (BYTE*)_aligned_malloc(1024 * 1024 * 4, 16);
		static int pitch = 1024 * 4;

		m_mem.ReadTexture(r, buff, pitch, TEX0, m_env.TEXA, CLAMP);

		m_texture[i].Update(r, buff, pitch);

		t = m_texture[i];

		if(s_dump)
		{
			CString str;
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_fr%d_%05x_%d.bmp"), s_n++, m_perfmon.GetFrame(), i, (int)TEX0.TBP0, (int)TEX0.PSM);
			if(s_save) t.Save(str);
		}

		return true;
	}

	bool TryAlphaTest(DWORD& fm, DWORD& zm)
	{
		const GSDrawingEnvironment& env = m_env;
		const GSDrawingContext* context = m_context;

		bool pass = true;

		if(context->TEST.ATST == ATST_NEVER)
		{
			pass = false;
		}
		else if(context->TEST.ATST != ATST_ALWAYS)
		{
			GSVector4i af = GSVector4i(m_vtrace.m_min.c.wwww(m_vtrace.m_max.c)) >> 7;

			int amin, amax;

			if(PRIM->TME && (context->TEX0.TCC || context->TEX0.TFX == TFX_DECAL))
			{
				DWORD bpp = GSLocalMemory::m_psm[context->TEX0.PSM].trbpp;
				DWORD cbpp = GSLocalMemory::m_psm[context->TEX0.CPSM].trbpp;
				DWORD pal = GSLocalMemory::m_psm[context->TEX0.PSM].pal;

				if(bpp == 32)
				{
					return false;
				}
				else if(bpp == 24)
				{
					amin = env.TEXA.AEM ? 0 : env.TEXA.TA0;
					amax = env.TEXA.TA0;
				}
				else if(bpp == 16)
				{
					amin = env.TEXA.AEM ? 0 : min(env.TEXA.TA0, env.TEXA.TA1);
					amax = max(env.TEXA.TA0, env.TEXA.TA1);
				}
				else
				{
					m_mem.m_clut.GetAlphaMinMax32(amin, amax);
				}

				switch(context->TEX0.TFX)
				{
				case TFX_MODULATE:
					amin = (amin * af.x) >> 7;
					amax = (amax * af.z) >> 7;
					if(amin > 255) amin = 255;
					if(amax > 255) amax = 255;
					break;
				case TFX_DECAL:
					break;
				case TFX_HIGHLIGHT:
					amin = amin + af.x;
					amax = amax + af.z;
					if(amin > 255) amin = 255;
					if(amax > 255) amax = 255;
					break;
				case TFX_HIGHLIGHT2:
					break;
				default:
					__assume(0);
				}
			}
			else
			{
				amin = af.x;
				amax = af.z;
			}

			int aref = context->TEST.AREF;

			switch(context->TEST.ATST)
			{
			case ATST_NEVER: 
				pass = false; 
				break;
			case ATST_ALWAYS: 
				pass = true; 
				break;
			case ATST_LESS: 
				if(amax < aref) pass = true;
				else if(amin >= aref) pass = false;
				else return false;
				break;
			case ATST_LEQUAL: 
				if(amax <= aref) pass = true;
				else if(amin > aref) pass = false;
				else return false;
				break;
			case ATST_EQUAL: 
				if(amin == aref && amax == aref) pass = true;
				else if(amin > aref || amax < aref) pass = false;
				else return false;
				break;
			case ATST_GEQUAL: 
				if(amin >= aref) pass = true;
				else if(amax < aref) pass = false;
				else return false;
				break;
			case ATST_GREATER: 
				if(amin > aref) pass = true;
				else if(amax <= aref) pass = false;
				else return false;
				break;
			case ATST_NOTEQUAL: 
				if(amin == aref && amax == aref) pass = false;
				else if(amin > aref || amax < aref) pass = true;
				else return false;
				break;
			default: 
				__assume(0);
			}
		}

		if(!pass)
		{
			switch(context->TEST.AFAIL)
			{
			case AFAIL_KEEP: fm = zm = 0xffffffff; break;
			case AFAIL_FB_ONLY: zm = 0xffffffff; break;
			case AFAIL_ZB_ONLY: fm = 0xffffffff; break;
			case AFAIL_RGB_ONLY: fm |= 0xff000000; zm = 0xffffffff; break;
			default: __assume(0);
			}
		}

		return true;
	}

	void GetScanlineParam(GSScanlineParam& p, GS_PRIM_CLASS primclass)
	{
		const GSDrawingEnvironment& env = m_env;
		const GSDrawingContext* context = m_context;

		p.vm = m_mem.m_vm32;

		p.fbo = m_mem.GetOffset(context->FRAME.Block(), context->FRAME.FBW, context->FRAME.PSM);
		p.zbo = m_mem.GetOffset(context->ZBUF.Block(), context->FRAME.FBW, context->ZBUF.PSM);
		p.fzbo = m_mem.GetOffset4(context->FRAME, context->ZBUF);

		p.sel.dw = 0;

		p.sel.fpsm = 3;
		p.sel.zpsm = 3;
		p.sel.atst = ATST_ALWAYS;
		p.sel.tfx = TFX_NONE;
		p.sel.abe = 255;
		p.sel.sprite = primclass == GS_SPRITE_CLASS ? 1 : 0;

		p.fm = context->FRAME.FBMSK;
		p.zm = context->ZBUF.ZMSK || context->TEST.ZTE == 0 ? 0xffffffff : 0;

		if(context->TEST.ZTE && context->TEST.ZTST == ZTST_NEVER)
		{
			p.fm = 0xffffffff;
			p.zm = 0xffffffff;
		}

		if(PRIM->TME)
		{
			m_mem.m_clut.Read32(context->TEX0, env.TEXA);
		}

		if(context->TEST.ATE)
		{
			if(!TryAlphaTest(p.fm, p.zm))
			{
				p.sel.atst = context->TEST.ATST;
				p.sel.afail = context->TEST.AFAIL;
			}
		}

		bool fwrite = p.fm != 0xffffffff;
		bool ftest = p.sel.atst != ATST_ALWAYS || context->TEST.DATE && context->FRAME.PSM != PSM_PSMCT24;

		if(fwrite || ftest)
		{
			p.sel.fpsm = GSUtil::EncodePSM(context->FRAME.PSM);

			if((primclass == GS_LINE_CLASS || primclass == GS_TRIANGLE_CLASS) && m_vtrace.m_eq.rgba != 15)
			{
				p.sel.iip = PRIM->IIP;
			}

			if(PRIM->TME)
			{
				p.sel.tfx = context->TEX0.TFX;
				p.sel.tcc = context->TEX0.TCC;
				p.sel.fst = PRIM->FST;
				p.sel.ltf = context->TEX1.IsLinear();
				p.sel.tlu = GSLocalMemory::m_psm[context->TEX0.PSM].pal > 0;

				if(p.sel.iip == 0 && p.sel.tfx == TFX_MODULATE && p.sel.tcc)
				{
					if(m_vtrace.m_eq.rgba == 15 && (m_vtrace.m_min.c == GSVector4(128.0f * 128.0f)).alltrue())
					{
						// modulate does not do anything when vertex color is 0x80

						p.sel.tfx = TFX_DECAL;
					}
				}

				if(p.sel.tfx == TFX_DECAL)
				{
					p.sel.tcc = 1;
				}

				if(p.sel.fst == 0)
				{
					// skip per pixel division if q is constant

					GSVertexSW* v = m_vertices;

					if(m_vtrace.m_eq.q)
					{
						p.sel.fst = 1;

						if(v[0].t.z != 1.0f)
						{
							GSVector4 w = v[0].t.zzzz().rcpnr();

							for(int i = 0, j = m_count; i < j; i++)
							{
								v[i].t *= w;
							}

							m_vtrace.m_min.t *= w;
							m_vtrace.m_max.t *= w;
						}
					}
					else if(primclass == GS_SPRITE_CLASS)
					{
						p.sel.fst = 1;

						GSVector4 tmin = GSVector4(FLT_MAX);
						GSVector4 tmax = GSVector4(-FLT_MAX);

						for(int i = 0, j = m_count; i < j; i += 2)
						{
							GSVector4 w = v[i + 1].t.zzzz().rcpnr();

							GSVector4 v0 = v[i + 0].t * w;
							GSVector4 v1 = v[i + 1].t * w;

							v[i + 0].t = v0;
							v[i + 1].t = v1;

							tmin = tmin.minv(v0).minv(v1);
							tmax = tmax.maxv(v0).maxv(v1);
						}

						m_vtrace.m_max.t = tmax;
						m_vtrace.m_min.t = tmin;
					}
				}

				if(p.sel.fst)
				{
					// if q is constant we can do the half pel shift for bilinear sampling on the vertices

					if(p.sel.ltf)
					{
						GSVector4 half(0x8000, 0x8000);

						GSVertexSW* v = m_vertices;

						for(int i = 0, j = m_count; i < j; i++)
						{
							v[i].t -= half;
						}

						m_vtrace.m_min.t -= half;
						m_vtrace.m_max.t += half;
					}
				}
				/*
				else
				{
					GSVector4 tmin = GSVector4(FLT_MAX);
					GSVector4 tmax = GSVector4(-FLT_MAX);

					GSVertexSW* v = m_vertices;

					for(int i = 0, j = m_count; i < j; i++)
					{
						GSVector4 v0 = v[i].t * v[i].t.zzzz().rcpnr();

						tmin = tmin.minv(v0);
						tmax = tmax.maxv(v0);
					}

					if(p.sel.ltf)
					{
						GSVector4 half(0x8000, 0x8000);

						tmin -= half;
						tmax += half;
					}

					m_vtrace.min.t = tmin;
					m_vtrace.max.t = tmax;
				}
				*/

				CRect r;
				
				int w = 1 << context->TEX0.TW;
				int h = 1 << context->TEX0.TH;

				MinMaxUV(w, h, r, p.sel.fst);

				const GSTextureCacheSW::GSTexture* t = m_tc->Lookup(context->TEX0, env.TEXA, &r);

				if(!t) {ASSERT(0); return;}

				p.tex = t->m_buff;
				p.clut = m_mem.m_clut;
				p.tw = t->m_tw;
			}

			p.sel.fge = PRIM->FGE;

			if(context->FRAME.PSM != PSM_PSMCT24)
			{
				p.sel.date = context->TEST.DATE;
			}

			if(PRIM->ABE)
			{
				if(!context->ALPHA.IsOpaque())
				{
					p.sel.abe = context->ALPHA.ai32[0];
					p.sel.pabe = env.PABE.PABE;
				}
			}

			if(PRIM->AA1)
			{
				// TODO: automatic alpha blending (ABE=1, A=0 B=1 C=0 D=1)
			}

			if(p.sel.date 
			|| p.sel.abea == 1 || p.sel.abeb == 1 || p.sel.abec == 1 || p.sel.abed == 1
			|| p.sel.atst != ATST_ALWAYS && p.sel.afail == AFAIL_RGB_ONLY 
			|| p.sel.fpsm == 0 && p.fm != 0 && p.fm != 0xffffffff
			|| p.sel.fpsm == 1 && (p.fm & 0x00ffffff) != 0 && (p.fm & 0x00ffffff) != 0x00ffffff
			|| p.sel.fpsm == 2 && (p.fm & 0x80f8f8f8) != 0 && (p.fm & 0x80f8f8f8) != 0x80f8f8f8)
			{
				p.sel.rfb = 1;
			}
		}

		bool zwrite = p.zm != 0xffffffff;
		bool ztest = context->TEST.ZTE && context->TEST.ZTST > 1;

		if(zwrite || ztest)
		{
			p.sel.zpsm = GSUtil::EncodePSM(context->ZBUF.PSM);
			p.sel.ztst = ztest ? context->TEST.ZTST : 1;
		}
	}

	void Draw()
	{
		m_vtrace.Update(m_vertices, m_count);

		GS_PRIM_CLASS primclass = GSUtil::GetPrimClass(PRIM->PRIM);

		GSScanlineParam p;

		GetScanlineParam(p, primclass);

		if((p.fm & p.zm) == 0xffffffff)
		{
			return;
		}

		if(s_dump)
		{
			CString str;
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_tex_%05x_%d.bmp"), s_n++, m_perfmon.GetFrame(), (int)m_context->TEX0.TBP0, (int)m_context->TEX0.PSM);
			if(PRIM->TME) if(s_save) {m_mem.SaveBMP(str, m_context->TEX0.TBP0, m_context->TEX0.TBW, m_context->TEX0.PSM, 1 << m_context->TEX0.TW, 1 << m_context->TEX0.TH);}
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_rt0_%05x_%d.bmp"), s_n++, m_perfmon.GetFrame(), m_context->FRAME.Block(), m_context->FRAME.PSM);
			if(s_save) {m_mem.SaveBMP(str, m_context->FRAME.Block(), m_context->FRAME.FBW, m_context->FRAME.PSM, GetFrameSize(1).cx, 512);}//GetFrameSize(1).cy);
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_rz0_%05x_%d.bmp"), s_n-1, m_perfmon.GetFrame(), m_context->ZBUF.Block(), m_context->ZBUF.PSM);
			if(s_savez) {m_mem.SaveBMP(str, m_context->ZBUF.Block(), m_context->FRAME.FBW, m_context->ZBUF.PSM, GetFrameSize(1).cx, 512);}
		}

		GSRasterizerData data;

		data.scissor = GSVector4i(m_context->scissor.in);
		data.scissor.z = min(data.scissor.z, (int)m_context->FRAME.FBW * 64); // TODO: find a game that overflows and check which one is the right behaviour
		data.primclass = primclass;
		data.vertices = m_vertices;
		data.count = m_count;
		data.param = &p;

		m_rl.Draw(&data);

		GSRasterizerStats stats;

		m_rl.GetStats(stats);
	
		m_perfmon.Put(GSPerfMon::Draw, 1);
		m_perfmon.Put(GSPerfMon::Prim, stats.prims);
		m_perfmon.Put(GSPerfMon::Fillrate, stats.pixels);

		GSVector4i pos(m_vtrace.m_min.p.xyxy(m_vtrace.m_max.p));

		GSVector4i scissor = data.scissor;

		CRect r;

		r.left = max(scissor.x, min(scissor.z, pos.x));
		r.top = max(scissor.y, min(scissor.w, pos.y));
		r.right = max(scissor.x, min(scissor.z, pos.z));
		r.bottom = max(scissor.y, min(scissor.w, pos.w));

		GIFRegBITBLTBUF BITBLTBUF;

		BITBLTBUF.DBW = m_context->FRAME.FBW;

		if(p.fm != 0xffffffff)
		{
			BITBLTBUF.DBP = m_context->FRAME.Block();
			BITBLTBUF.DPSM = m_context->FRAME.PSM;

			m_tc->InvalidateVideoMem(BITBLTBUF, r);
		}

		if(p.zm != 0xffffffff)
		{
			BITBLTBUF.DBP = m_context->ZBUF.Block();
			BITBLTBUF.DPSM = m_context->ZBUF.PSM;

			m_tc->InvalidateVideoMem(BITBLTBUF, r);
		}

		if(s_dump)
		{
			CString str;
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_rt1_%05x_%d.bmp"), s_n++, m_perfmon.GetFrame(), m_context->FRAME.Block(), m_context->FRAME.PSM);
			if(s_save) {m_mem.SaveBMP(str, m_context->FRAME.Block(), m_context->FRAME.FBW, m_context->FRAME.PSM, GetFrameSize(1).cx, 512);}//GetFrameSize(1).cy);
			str.Format(_T("c:\\temp1\\_%05d_f%I64d_rz1_%05x_%d.bmp"), s_n-1, m_perfmon.GetFrame(), m_context->ZBUF.Block(), m_context->ZBUF.PSM);
			if(s_savez) {m_mem.SaveBMP(str, m_context->ZBUF.Block(), m_context->FRAME.FBW, m_context->ZBUF.PSM, GetFrameSize(1).cx, 512);}
		}
	}

	void InvalidateVideoMem(const GIFRegBITBLTBUF& BITBLTBUF, CRect r)
	{
		m_tc->InvalidateVideoMem(BITBLTBUF, r);
	}

	void MinMaxUV(int w, int h, CRect& r, DWORD fst)
	{
		const GSDrawingContext* context = m_context;

		int wms = context->CLAMP.WMS;
		int wmt = context->CLAMP.WMT;

		int minu = (int)context->CLAMP.MINU;
		int minv = (int)context->CLAMP.MINV;
		int maxu = (int)context->CLAMP.MAXU;
		int maxv = (int)context->CLAMP.MAXV;

		GSVector4i vr(0, 0, w, h);

		switch(wms)
		{
		case CLAMP_REPEAT:
			break;
		case CLAMP_CLAMP:
			break;
		case CLAMP_REGION_CLAMP:
			if(vr.x < minu) vr.x = minu;
			if(vr.z > maxu + 1) vr.z = maxu + 1;
			break;
		case CLAMP_REGION_REPEAT:
			vr.x = maxu; 
			vr.z = vr.x + (minu + 1);
			break;
		default: 
			__assume(0);
		}

		switch(wmt)
		{
		case CLAMP_REPEAT:
			break;
		case CLAMP_CLAMP:
			break;
		case CLAMP_REGION_CLAMP:
			if(vr.y < minv) vr.y = minv;
			if(vr.w > maxv + 1) vr.w = maxv + 1;
			break;
		case CLAMP_REGION_REPEAT:
			vr.y = maxv; 
			vr.w = vr.y + (minv + 1);
			break;
		default:
			__assume(0);
		}

		if(fst)
		{
			GSVector4i uv = GSVector4i(m_vtrace.m_min.t.xyxy(m_vtrace.m_max.t)).sra32(16);
/*
			int tw = context->TEX0.TW;
			int th = context->TEX0.TH;

			GSVector4i u = uv & GSVector4i::xffffffff().srl32(32 - tw);
			GSVector4i v = uv & GSVector4i::xffffffff().srl32(32 - th);

			GSVector4i uu = uv.sra32(tw);
			GSVector4i vv = uv.sra32(th);

			int mask = (uu.upl32(vv) == uu.uph32(vv)).mask();
*/
			switch(wms)
			{
			case CLAMP_REPEAT:
/*
				if(mask & 0x000f)
				{
					if(vr.x < u.x) vr.x = u.x;
					if(vr.z > u.z + 1) vr.z = u.z + 1;
				}
*/
				break;
			case CLAMP_CLAMP:
			case CLAMP_REGION_CLAMP:
				if(vr.x < uv.x) vr.x = uv.x;
				if(vr.z > uv.z + 1) vr.z = uv.z + 1;
				break;
			case CLAMP_REGION_REPEAT: // TODO
				break;
			default:
				__assume(0);
			}

			switch(wmt)
			{
			case CLAMP_REPEAT:
/*
				if(mask & 0xf000)
				{
					if(vr.y < v.y) vr.y = v.y;
					if(vr.w > v.w + 1) vr.w = v.w + 1;
				}
*/
				break;
			case CLAMP_CLAMP:
			case CLAMP_REGION_CLAMP:
				if(vr.y < uv.y) vr.y = uv.y;
				if(vr.w > uv.w + 1) vr.w = uv.w + 1;
				break;
			case CLAMP_REGION_REPEAT: // TODO
				break;
			default:
				__assume(0);
			}
		}

		r = vr;

		r &= CRect(0, 0, w, h);
	}

public:
	GSRendererSW(BYTE* base, bool mt, void (*irq)(), int nloophack, const GSRendererSettings& rs, int threads)
		: GSRendererT(base, mt, irq, nloophack, rs)
	{
		m_rl.Create<GSDrawScanline>(this, threads);

		m_tc = new GSTextureCacheSW(this);

		InitVertexKick<GSRendererSW<Device> >();
	}

	virtual ~GSRendererSW()
	{
		delete m_tc;
	}

	template<DWORD prim, DWORD tme, DWORD fst> 
	void VertexKick(bool skip)
	{
		const GSDrawingContext* context = m_context;

		GSVector4i xy = GSVector4i::load((int)m_v.XYZ.ai32[0]);
		
		xy = xy.insert16<3>(m_v.FOG.F);
		xy = xy.upl16();
		xy -= context->XYOFFSET;

		GSVertexSW v;

		v.p = GSVector4(xy) * g_pos_scale;

		v.c = GSVector4(GSVector4i::load((int)m_v.RGBAQ.ai32[0]).u8to32() << 7);

		if(tme)
		{
			float q;

			if(fst)
			{
				v.t = GSVector4(((GSVector4i)m_v.UV).upl16() << (16 - 4));
				q = 1.0f;
			}
			else
			{
				v.t = GSVector4(m_v.ST.S, m_v.ST.T);
				v.t *= GSVector4(0x10000 << context->TEX0.TW, 0x10000 << context->TEX0.TH);
				q = m_v.RGBAQ.Q;
			}

			v.t = v.t.xyxy(GSVector4::load(q));
		}

		GSVertexSW& dst = m_vl.AddTail();

		dst = v;

		dst.p.z = (float)min(m_v.XYZ.Z, 0xffffff00); // max value which can survive the DWORD => float => DWORD conversion

		DWORD count = 0;
		
		if(GSVertexSW* v = DrawingKick<prim>(skip, count))
		{
			GSVector4 pmin, pmax;

			switch(prim)
			{
			case GS_POINTLIST:
				pmin = v[0].p;
				pmax = v[0].p;
				break;
			case GS_LINELIST:
			case GS_LINESTRIP:
			case GS_SPRITE:
				pmin = v[0].p.minv(v[1].p);
				pmax = v[0].p.maxv(v[1].p);
				break;
			case GS_TRIANGLELIST:
			case GS_TRIANGLESTRIP:
			case GS_TRIANGLEFAN:
				pmin = v[0].p.minv(v[1].p).minv(v[2].p);
				pmax = v[0].p.maxv(v[1].p).maxv(v[2].p);
				break;
			}

			GSVector4 scissor = context->scissor.ex;

			GSVector4 test = (pmax < scissor) | (pmin > scissor.zwxy());

			switch(prim)
			{
			case GS_TRIANGLELIST:
			case GS_TRIANGLESTRIP:
			case GS_TRIANGLEFAN:
			case GS_SPRITE:
				test |= pmin.ceil() == pmax.ceil();
				break;
			}

			if(test.mask() & 3)
			{
				return;
			}

			switch(prim)
			{
			case GS_POINTLIST:
				break;
			case GS_LINELIST:
			case GS_LINESTRIP:
				if(PRIM->IIP == 0) {v[0].c = v[1].c;}
				break;
			case GS_TRIANGLELIST:
			case GS_TRIANGLESTRIP:
			case GS_TRIANGLEFAN:
				if(PRIM->IIP == 0) {v[0].c = v[2].c; v[1].c = v[2].c;}
				break;
			case GS_SPRITE:
				break;
			}

			if(m_count >= 3 && m_count < 30)
			{
				GSVertexSW* v = &m_vertices[m_count - 3];

				int tl = 0;
				int br = 0;

				bool isquad = false;

				switch(prim)
				{
				case GS_TRIANGLESTRIP:
				case GS_TRIANGLEFAN:
				case GS_TRIANGLELIST:
					isquad = GSVertexSW::IsQuad(v, tl, br);
					break;
				}

				if(isquad)
				{
					m_count -= 3;

					if(m_count > 0)
					{
						tl += m_count;
						br += m_count;

						Flush();
					}

					if(tl != 0) m_vertices[0] = m_vertices[tl];
					if(br != 1) m_vertices[1] = m_vertices[br];

					m_count = 2;

					UINT32 tmp = PRIM->PRIM;
					PRIM->PRIM = GS_SPRITE;

					Flush();

					PRIM->PRIM = tmp;

					m_perfmon.Put(GSPerfMon::Quad, 1);

					return;
				}
			}

			m_count += count;
		}
	}
};