/*  ZZ Open GL graphics plugin
 *  Copyright (c)2009 zeydlitz@gmail.com
 *  Based on Zerofrog's ZeroGS KOSMOS (c)2005-2006
 *
 *  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 of the License, 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

// Realisation of RenderCRTC function ONLY.
// It draw picture direct on screen, so here we have interlacing and frame skipping. 

//------------------ Includes
#include <stdlib.h>

#include "zerogs.h"
#include "targets.h"

using namespace ZeroGS;

//------------------ Defines
#ifdef RELEASE_TO_PUBLIC
#define g_bSaveFrame 0
#define g_bSaveFinalFrame 0
#else // NOT RELEASE_TO_PUBLIC
BOOL g_bSaveFrame = 0;  // saves the current psurfTarget
BOOL g_bSaveFinalFrame = 0; // saves the input to the CRTC
#endif // RELEASE_TO_PUBLIC

#define INTERLACE_COUNT (bInterlace && interlace == (conf.interlace))

// ----------------- Types
//------------------ Dummies

//------------------ variables

#ifdef _WIN32
extern 		HDC		hDC;	   // Private GDI Device Context
extern		HGLRC	 	hRC;	   // Permanent Rendering Context
#endif

BOOL g_bCRTCBilinear = TRUE;
extern bool g_bIsLost;
int g_nFrameRender = 10;
int g_nFramesSkipped = 0;

extern int s_frameskipping;
extern float fFPS;
extern unsigned char zgsrevision, zgsbuild, zgsminor;

extern u32 g_SaveFrameNum; 
extern int s_nWriteDepthCount;
extern int s_nWireframeCount;
extern int s_nWriteDestAlphaTest;

extern int g_PrevBitwiseTexX, g_PrevBitwiseTexY; // textures stored in SAMP_BITWISEANDX and SAMP_BITWISEANDY

BOOL g_bDisplayFPS = FALSE;

extern bool s_bDestAlphaTest;
extern int s_ClutResolve;
extern int s_nLastResolveReset;
extern int g_nDepthUpdateCount;
extern int s_nResolveCounts[30]; // resolve counts for last 30 frames
static int s_nCurResolveIndex = 0;
int s_nResolved = 0; // number of targets resolved this frame 
extern int g_nDepthUsed; // ffx2 pal movies

extern vector<u32> s_vecTempTextures;		   // temporary textures, released at the end of every frame

//------------------ Namespace

namespace ZeroGS {
	extern int s_nNewWidth, s_nNewHeight;

	extern CRangeManager s_RangeMngr; // manages overwritten memory
	extern void FlushTransferRanges(const tex0Info* ptex);
	extern void ProcessMessages();
	void AdjustTransToAspect(Vector& v);

	// Interlace texture is lazy 1*(height) array of 1 and 0. 
	// It height (it named s_nInterlaceTexWidth here) hanging we must redone
	// the texture. 
	// FIXME: If this function would spammed to often, we could use
	// width < s_nInterlaceTexWidth as correct for old texture
	static int s_nInterlaceTexWidth = 0;				// width of texture
	inline u32 CreateInterlaceTex(int width) {
		if (width == s_nInterlaceTexWidth && s_ptexInterlace != 0) 
			return s_ptexInterlace;

		SAFE_RELEASE_TEX(s_ptexInterlace);
		s_nInterlaceTexWidth = width;

		vector<u32> data(width);
		for (int i = 0; i < width; ++i) 
			data[i] = (i & 1) ? 0xffffffff : 0;
	
		glGenTextures(1, &s_ptexInterlace);
		glBindTexture(GL_TEXTURE_RECTANGLE_NV, s_ptexInterlace);
		glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, 4, width, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &data[0]);
		glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		GL_REPORT_ERRORD();
		return s_ptexInterlace;
	}
}
//------------------ Code

// Adjusts vertex shader BitBltPos vector v to preserve aspect ratio. It used to emulate 4:3 or 16:9.
void ZeroGS::AdjustTransToAspect(Vector& v) 
{
	double temp;
	float f;
	int dispwidth = 640;
       	int dispheight = conf.isWideScreen ? 360 : 480;

	if( dispwidth * nBackbufferHeight > dispheight * nBackbufferWidth) {
		// limited by width
		
		// change in ratio
		f = ((float)nBackbufferWidth / (float)dispwidth) / ((float)nBackbufferHeight / (float)dispheight);
		v.y *= f;
		v.w *= f;

		// scanlines mess up when not aligned right
		v.y += (1-(float)modf(v.y*(float)nBackbufferHeight*0.5f+0.05f, &temp))*2.0f/(float)nBackbufferHeight;
		v.w += (1-(float)modf(v.w*(float)nBackbufferHeight*0.5f+0.05f, &temp))*2.0f/(float)nBackbufferHeight;
	}
	else {
		// limited by height
		f = ((float)nBackbufferHeight / (float)dispheight) / ((float)nBackbufferWidth / (float)dispwidth);
		f -= (float)modf(f*nBackbufferWidth, &temp)/(float)nBackbufferWidth;
		v.x *= f;
		v.z *= f;
	}
	v *= 1/32767.0f;
}

// Helper for skip frames.
int TimeLastSkip=0;
inline bool FrameSkippingHelper() {
	bool ShouldSkip = false;
	if( g_nFrameRender > 0 ) {
		if( g_nFrameRender < 8 ) {
			g_nFrameRender++;
			if( g_nFrameRender <= 3 ) {
				g_nFramesSkipped++;
				ShouldSkip = true;
			}
		}
	}
	else {
		if( g_nFrameRender < -1 ) {
			g_nFramesSkipped++;
			ShouldSkip = true;
		}
		g_nFrameRender--;
	}
	

#if defined _DEBUG
	if (timeGetTime() - TimeLastSkip > 15000 && ShouldSkip) {
		ERROR_LOG("ZZogl Skipped frames\n");
		TimeLastSkip = timeGetTime();
	}
#endif	
	return ShouldSkip;
}

// helper function for save frame in picture.
inline void FrameSavingHelper() {
	if( g_bSaveFrame ) {
		if( vb[0].prndr != NULL ) {
			SaveTexture("frame1.tga", GL_TEXTURE_RECTANGLE_NV, vb[0].prndr->ptex, RW(vb[0].prndr->fbw), RH(vb[0].prndr->fbh));
		}
		
		if( vb[1].prndr != NULL && vb[0].prndr != vb[1].prndr ) {
			SaveTexture("frame2.tga", GL_TEXTURE_RECTANGLE_NV, vb[1].prndr->ptex, RW(vb[1].prndr->fbw), RH(vb[1].prndr->fbh));
		}
#ifdef _WIN32
		else DeleteFile("frame2.tga");
#endif
	}
	g_SaveFrameNum = 0;
	g_bSaveFlushedFrame = 1;
}

// Function populated tex0Info[2] array
inline void FrameObtainDispinfo(u32 bInterlace, tex0Info* dispinfo) {
	for(int i = 0; i < 2; ++i) {

		if( !(*(u32*)(PMODE) & (1<<i)) ) {
			dispinfo[i].tw = 0;
			dispinfo[i].th = 0;
			continue;
		}

		GSRegDISPFB* pfb = i ? DISPFB2 : DISPFB1;
		GSRegDISPLAY* pd = i ? DISPLAY2 : DISPLAY1;
		int magh = pd->MAGH+1;
		int magv = pd->MAGV+1;
		
		dispinfo[i].tbp0 =  pfb->FBP << 5;
		dispinfo[i].tbw = pfb->FBW << 6;
		dispinfo[i].tw = (pd->DW + 1) / magh;
		dispinfo[i].th = (pd->DH + 1) / magv;
		dispinfo[i].psm = pfb->PSM;

		// hack!!
		// 2 * dispinfo[i].tw / dispinfo[i].th <= 1, metal slug 4
		if( bInterlace && 2 * dispinfo[i].tw / dispinfo[i].th <= 1 && !(g_GameSettings&GAME_INTERLACE2X) ) {
			dispinfo[i].th >>= 1;
		}
	}
}


// Something should be done before Renderer the picture.
inline void RenderStartHelper(u32 bInterlace){
	// Crashes Final Fantasy X at startup if uncommented. --arcum42
//#ifdef RELEASE_TO_PUBLIC
//	if(g_nRealFrame < 80 ) {
//		RenderCustom( min(1.0f, 2.0f - (float)g_nRealFrame / 40.0f) );
//
//	  if( g_nRealFrame == 79 )
//		SAFE_RELEASE_TEX(ptexLogo);
//	  return;
//	}
//#endif
	if( conf.mrtdepth && pvs[8] == NULL ) {
		conf.mrtdepth = 0;
		s_bWriteDepth = FALSE;
#ifdef DEBUG		
		ERROR_LOG("Disabling MRT depth writing\n");
#endif
	}

	Flush(0);
	Flush(1);
	GL_REPORT_ERRORD();

	FrameSavingHelper();

	if( s_RangeMngr.ranges.size() > 0 )
		FlushTransferRanges(NULL);

	SetShaderCaller("RenderStartHelper");
	// reset fba after every frame
	vb[0].fba.fba = 0;
	vb[1].fba.fba = 0;

	glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 ); // switch to the backbuffer
	glViewport(0, 0, nBackbufferWidth, nBackbufferHeight);

	// if interlace, only clear every other vsync
	if(!bInterlace ) 
	{
		//u32 color = COLOR_ARGB(0, BGCOLOR->R, BGCOLOR->G, BGCOLOR->B);
		glClear(GL_COLOR_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
	}

	SETVERTEXSHADER(pvsBitBlt.prog);
	glBindBuffer(GL_ARRAY_BUFFER, vboRect);
	SET_STREAM();
	GL_REPORT_ERRORD();

	if( conf.options & GSOPTION_WIREFRAME ) 
		glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
	
	DisableAllgl() ;
	GL_REPORT_ERRORD();

	if( bInterlace ) g_PrevBitwiseTexX = -1; // reset since will be using
}

// It is setting for intrelace texture multiplied vector;
// Idea is: (x, y) -- position on screen, than interlaced texture get F = 1 ot 0 depends
// on image y coord. So it we write valpha.z * F + valpha.w + 0.5 it would be swicthig odd
// and even strings at each frame
// valpha.x and y used for image blending.
inline Vector RenderGetForClip(u32 bInterlace, int interlace, int psm, FRAGMENTSHADER* prog){
	SetShaderCaller("RenderGetForClip");

	Vector valpha;
	// first render the current render targets, then from ptexMem
	if( psm == 1 ) {
		valpha.x = 1;
		valpha.y = 0;
	}
	else {
		valpha.x = 0;
		valpha.y = 1;
	}
	
	if (bInterlace) {
		if( interlace == (conf.interlace&1)  ) {
			// pass if odd
			valpha.z = 1.0f;
			valpha.w = -0.4999f;
		}
		else {
			// pass if even
			valpha.z = -1.0f;
			valpha.w = 0.5001f;
		}
	}
	else {
		// always pass interlace test
		valpha.z = 0;
		valpha.w = 1;
	}

	ZZcgSetParameter4fv(prog->sOneColor, valpha, "g_fOneColor");
	return valpha;
}

// Put interlaced texture in use for shader prog.
// Note: if frame interlaced it's th is halved, so we should x2 it.
inline void RenderCreateInterlaceTex(u32 bInterlace, int th, FRAGMENTSHADER* prog) {
	if (!bInterlace) 
		return;

	int interlacetex = CreateInterlaceTex(2*th);
	cgGLSetTextureParameter(prog->sInterlace, interlacetex);
	cgGLEnableTextureParameter(prog->sInterlace);
}

// Well, do blending setup prior to second pass of half-frame drawing
inline void RenderSetupBlending() {
	// setup right blending
	glEnable(GL_BLEND);
	zgsBlendEquationSeparateEXT(GL_FUNC_ADD, GL_FUNC_ADD);

	if (PMODE->MMOD) {
		glBlendColorEXT(PMODE->ALP*(1/255.0f), PMODE->ALP*(1/255.0f), PMODE->ALP*(1/255.0f), 0.5f);
		s_srcrgb = GL_CONSTANT_COLOR_EXT;
		s_dstrgb = GL_ONE_MINUS_CONSTANT_COLOR_EXT;
	}
	else {
		s_srcrgb = GL_SRC_ALPHA;
		s_dstrgb = GL_ONE_MINUS_SRC_ALPHA;
	}

	s_srcalpha = PMODE->AMOD ? GL_ZERO : GL_ONE;
	s_dstalpha = PMODE->AMOD? GL_ONE : GL_ZERO;
	zgsBlendFuncSeparateEXT(s_srcrgb, s_dstrgb, s_srcalpha, s_dstalpha);
}

// each frame could be drawed in two stages, so blending should be different for them
inline void RenderSetupStencil(int i) {
	glStencilMask(1<<i);
	s_stencilmask = 1<<i;
	GL_STENCILFUNC_SET();
}

// do stencil check for each found target i -- texturig stage
inline void RenderUpdateStencil(int i, bool* bUsingStencil) {
	if( !(*bUsingStencil) ) {
		glClear(GL_STENCIL_BUFFER_BIT);
	}
	*bUsingStencil = 1;
	glEnable(GL_STENCIL_TEST);
	GL_STENCILFUNC(GL_NOTEQUAL, 3, 1<<i);
	glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
	glStencilMask(1<<i);
}

// CRTC24 could not be rendered 
inline void RenderCRTC24helper(u32 bInterlace, int interlace, int psm) {
	ERROR_LOG("ZZogl: CRTC24!!! I trying to show something\n");
	SetShaderCaller("RenderCRTC24helper");
	// assume that data is already in ptexMem (do Resolve?)
	RenderGetForClip(bInterlace, interlace, psm, &ppsCRTC24[bInterlace]);
	SETPIXELSHADER(ppsCRTC24[bInterlace].prog);
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);				
}

// Maybe I do this function global-defined. Calculate bits per pixel for
// each psm. It's obly place with PSMCT16 which have diffetent bpp. 
// FIXME: check PSMCT16S
inline int RenderGetBpp(int psm) {
	if (psm == PSMCT16S) {
		return 3;
#ifdef _DEBUG
		ERROR_LOG("ZZogl: 16S target\n");
#endif 		
	}
	if (PSMT_ISHALF(psm)) 
		return 2;	
	return 4;
}

// We want to draw ptarg on screen, that could be disaligned to viewport.
// So we do aligning it by height.
inline int RenderGetOffsets(int* dby, int* movy, tex0Info& texframe, CRenderTarget* ptarg, int bpp) {
	*dby += (256/bpp)*(texframe.tbp0 - ptarg->fbp)/texframe.tbw;
	if( *dby < 0 ) {
		*movy = -*dby;
		*dby = 0;
	}
	return min(ptarg->fbh - *dby, texframe.th - *movy);
}

// BltBit shader calculate vertex (4 coord's pixel) position at the viewport.
inline Vector RenderSetTargetBitPos(int dh, int th, int movy, bool isInterlace) {
	SetShaderCaller("RenderSetTargetBitPos");
	Vector v;
	// dest rect
	v.x = 1;
	v.y = dh/(float)th;
	v.z = 0;
	v.w = 1-v.y;

	if( movy > 0 )
		v.w -= movy/(float)th;

	AdjustTransToAspect(v);

	if (isInterlace) {
		// move down by 1 pixel
		v.w += 1.0f / (float)dh ;
	}

	ZZcgSetParameter4fv(pvsBitBlt.sBitBltPos, v, "g_fBitBltPos");
	return v;
}

// Important stuff. We could use this coordinated to change viewport position on frame
// For example use tw / X and tw / X magnify the vieport.
// Interlaced output is little out of VB, it could be see as evil blinking line on top 
// and bottom, so we try to remove it 
inline Vector RenderSetTargetBitTex(float th, float tw, float dh, float dw, bool isInterlace) {
	SetShaderCaller("RenderSetTargetBitTex");

	Vector v;
	v = Vector(th, tw, dh, dw);

	// Incorrect Asect ration on interlaced frames
	if (isInterlace) {
		v.y -= 1.0f/480 ;
		v.w += 1.0f/480 ;
	}

	ZZcgSetParameter4fv(pvsBitBlt.sBitBltTex, v, "g_fBitBltTex");
	return v;
}

// Translator for POSITION coordinats (-1.0:+1.0f at x axis, +1.0f:-1.0y at y) into target frame ones
// We don't need x coordinate, bvecause interlacing is y-axis only. 
inline Vector RenderSetTargetBitTrans(int th) {
	SetShaderCaller("RenderSetTargetBitTrans");
	Vector v = Vector( float(th), -float(th), float(th), float(th));
	ZZcgSetParameter4fv(pvsBitBlt.fBitBltTrans, v, "g_fBitBltTrans");
	return v;
}

// use g_fInvTexDims to store inverse texture dims
// Seems, that Targ shader does not use it
inline Vector RenderSetTargetInvTex(int bInterlace, int tw, int th, FRAGMENTSHADER* prog) {
	SetShaderCaller("RenderSetTargetInvTex");

	Vector v = Vector(0, 0, 0, 0); 
	if (prog->sInvTexDims) {
		v.x = 1.0f / (float)tw;
		v.y = 1.0f / (float)th;
		v.z = (float)0.0;
		v.w = -0.5f / (float)th;
		ZZcgSetParameter4fv(prog->sInvTexDims, v, "g_fInvTexDims");
	}
	return v;
}

// Metal Slug 5 hack (as was written). If tarhet tbp not equal to framed fbp, than we look for better possibility,
// Note, than after true result iterator it could not be use.
inline bool RenderLookForABetterTarget(int fbp, int tbp, list<CRenderTarget*>& listTargs, list<CRenderTarget*>::iterator& it) {
	if (fbp == tbp)
		return false;

	// look for a better target (metal slug 5)
	list<CRenderTarget*>::iterator itbetter;
	for(itbetter = listTargs.begin(); itbetter != listTargs.end(); ++itbetter ) {
		if( (*itbetter)->fbp == tbp )
			break;
	}

	if( itbetter != listTargs.end() ) {
		it = listTargs.erase(it);
		return true;
	}

	return false;
}

// First try to draw frame from targets. It's 
inline bool RenderCheckForTargets(tex0Info& texframe, list<CRenderTarget*>& listTargs, int i, bool* bUsingStencil, int interlace, int bInterlace) {
	// get the start and end addresses of the buffer
	int bpp = RenderGetBpp(texframe.psm);
	GSRegDISPFB* pfb = i ? DISPFB2 : DISPFB1;

	int start, end;
	GetRectMemAddress(start, end, texframe.psm, 0, 0, texframe.tw, texframe.th, texframe.tbp0, texframe.tbw);

	// We need share list of targets beetween functions
	s_RTs.GetTargs(start, end, listTargs);

	for(list<CRenderTarget*>::iterator it = listTargs.begin(); it != listTargs.end(); ) {
	
		CRenderTarget* ptarg = *it;
		if( ptarg->fbw == texframe.tbw && !(ptarg->status&CRenderTarget::TS_NeedUpdate) && ((256/bpp)*(texframe.tbp0-ptarg->fbp))%texframe.tbw == 0 ) {

			if (RenderLookForABetterTarget(ptarg->fbp, texframe.tbp0, listTargs, it)) 
			       continue;

			if( g_bSaveFinalFrame )
				SaveTexture("frame1.tga", GL_TEXTURE_RECTANGLE_NV, ptarg->ptex, RW(ptarg->fbw), RH(ptarg->fbh));

			// determine the rectangle to render
			int dby = pfb->DBY;
			int movy = 0;
			int dh = RenderGetOffsets(&dby, &movy, texframe, ptarg, bpp);

			if( dh >= 64 ) {

				if( ptarg->fbh - dby < texframe.th - movy && !(*bUsingStencil) ) 
					RenderUpdateStencil(i, bUsingStencil);
				
				SetShaderCaller("RenderCheckForTargets");
				// Texture
				Vector v = RenderSetTargetBitTex((float)RW(texframe.tw), (float)RH(dh), (float)RW(pfb->DBX), (float)RH(dby), INTERLACE_COUNT );
				// dest rect
				v = RenderSetTargetBitPos(dh, texframe.th, movy, INTERLACE_COUNT);
				v = RenderSetTargetBitTrans(ptarg->fbh);
				v = RenderSetTargetInvTex(bInterlace, texframe.tbw, ptarg->fbh, &ppsCRTCTarg[bInterlace]) ; 	// FIXME. This is no use 
				
				Vector valpha = RenderGetForClip(bInterlace, interlace, texframe.psm, &ppsCRTCTarg[bInterlace]);

				// inside vb[0]'s target area, so render that region only
				cgGLSetTextureParameter(ppsCRTCTarg[bInterlace].sFinal, ptarg->ptex);
				cgGLEnableTextureParameter(ppsCRTCTarg[bInterlace].sFinal);

				RenderCreateInterlaceTex(bInterlace, texframe.th, &ppsCRTCTarg[bInterlace]);

				SETPIXELSHADER(ppsCRTCTarg[bInterlace].prog);
				GL_REPORT_ERRORD();

				glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

				if( abs(dh - (int)texframe.th) <= 1 )
					return true;

				if( abs(dh - (int)ptarg->fbh) <= 1 ) {
					it = listTargs.erase(it);
					continue;
				}
			}
		}
		++it;
	}
	return false;
}


// The same of the previous, but from memory
inline void RenderCheckForMemory(tex0Info& texframe, list<CRenderTarget*>& listTargs, int interlace, int bInterlace) {

	for(list<CRenderTarget*>::iterator it = listTargs.begin(); it != listTargs.end(); ++it)
		(*it)->Resolve();

	// context has to be 0
	CMemoryTarget* pmemtarg = g_MemTargs.GetMemoryTarget(texframe, 1);
	if ((pmemtarg == NULL) || (bInterlace >= 2))
		ERROR_LOG("CRCR Check for memory shader fault");

	SetShaderCaller("RenderCheckForMemory");

	SetTexVariablesInt(0, g_bCRTCBilinear ? 2 : 0, texframe, pmemtarg, &ppsCRTC[bInterlace], 1);
	cgGLSetTextureParameter(ppsCRTC[bInterlace].sMemory, pmemtarg->ptex->tex);
	cgGLEnableTextureParameter(ppsCRTC[bInterlace].sMemory);

	if( g_bSaveFinalFrame )
		SaveTex(&texframe, g_bSaveFinalFrame - 1 > 0);

	// finally render from the memory (note that the stencil buffer will keep previous regions)
	Vector v = RenderSetTargetBitPos(1, 1, 0, INTERLACE_COUNT);

	// Fixme: Why this if here?
	if( g_bCRTCBilinear )
		ZZcgSetParameter4fv(pvsBitBlt.sBitBltTex, Vector(texframe.tw,texframe.th,-0.5f,-0.5f), "g_fBitBltTex");
	else
		ZZcgSetParameter4fv(pvsBitBlt.sBitBltTex, Vector(1,1,-0.5f/(float)texframe.tw,-0.5f/(float)texframe.th), "g_fBitBltTex");
			
	v = RenderSetTargetBitTrans(texframe.th);
	v = RenderSetTargetInvTex(bInterlace, texframe.tw, texframe.th, &ppsCRTC[bInterlace]);

	Vector valpha = RenderGetForClip(bInterlace, interlace, texframe.psm, &ppsCRTC[bInterlace]);
	RenderCreateInterlaceTex(bInterlace, texframe.th, &ppsCRTC[bInterlace]);

	SETPIXELSHADER(ppsCRTC[bInterlace].prog);
	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
}

// Put FPS counter on scren (not in window title)
inline void AfterRenderDisplayFPS() {
	char str[64];
	int left = 10, top = 15;
	sprintf(str, "%.1f fps", fFPS);

	DrawText(str, left+1, top+1, 0xff000000);
	DrawText(str, left, top, 0xffc0ffff);
}

// Swaping buffers, so we could use another windows
inline void AfterRenderSwapBuffers() {
	if (glGetError() != GL_NO_ERROR) 
		DEBUG_LOG("glerror before swap!\n");

	GLWin.SwapGLBuffers();
}

// SnapeShoot helper
inline void AfterRenderMadeSnapshoot() {
	char str[64];
	int left = 200, top = 15;
	sprintf(str, "ZeroGS %d.%d.%d - %.1f fps %s", zgsrevision, zgsbuild, zgsminor, fFPS, s_frameskipping?" - frameskipping":"");

	DrawText(str, left+1, top+1, 0xff000000);
	DrawText(str, left, top, 0xffc0ffff);

	if( SaveRenderTarget(strSnapshot != ""?strSnapshot.c_str():"temp.jpg", nBackbufferWidth, -nBackbufferHeight, 0)) {//(conf.options&GSOPTION_TGASNAP)?0:1) ) {
		char str[255];
		sprintf(str, "saved %s\n", strSnapshot.c_str());
		AddMessage(str, 500);
	}	
}

// If needed reset
inline void AfterRendererResizeWindow() {
	Reset();
	ChangeDeviceSize(s_nNewWidth, s_nNewHeight);
	s_nNewWidth = s_nNewHeight = -1;
}

// Put new values on statistic variable
inline void AfterRenderCountStatistics() {
	if( s_nWriteDepthCount > 0 ) {
		assert( conf.mrtdepth );
		if( --s_nWriteDepthCount <= 0 ) {
			s_bWriteDepth = FALSE;
		}
	}

	if( s_nWriteDestAlphaTest > 0 ) {
		if( --s_nWriteDestAlphaTest <= 0 ) {
			s_bDestAlphaTest = FALSE;
		}
	}

	if( g_nDepthUsed > 0 ) --g_nDepthUsed;

	s_ClutResolve = 0;
	g_nDepthUpdateCount = 0;
}

// This all could be easily forefeit
inline void AfterRendererUnimportantJob() {
	ProcessMessages();

	if( g_bDisplayFPS ) 
		AfterRenderDisplayFPS();

	AfterRenderSwapBuffers();

	if( conf.options & GSOPTION_WIREFRAME ) {
		// clear all targets
		s_nWireframeCount = 1;
	}

	if( g_bMakeSnapshot ) {	
		AfterRenderMadeSnapshoot();
		g_bMakeSnapshot = 0;
	}

	if( s_avicapturing ) 
		CaptureFrame();

	AfterRenderCountStatistics();

	if( s_nNewWidth >= 0 && s_nNewHeight >= 0 && !g_bIsLost )
		AfterRendererResizeWindow();

	maxmin = 608;
}

// Swich Frabuffers
inline void AfterRendererSwitchBackToTextures() {
	glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, s_uFramebuffer );

	g_MemTargs.DestroyCleared();

	if( s_vecTempTextures.size() > 0 )
		glDeleteTextures((GLsizei)s_vecTempTextures.size(), &s_vecTempTextures[0]);
	s_vecTempTextures.clear();

	if( EXTWRITE->WRITE&1 ) {
		WARN_LOG("EXTWRITE\n");
		ExtWrite();
		EXTWRITE->WRITE = 0;
	}

	if( conf.options & GSOPTION_WIREFRAME ) glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
	glEnable(GL_SCISSOR_TEST);

	if( icurctx >= 0 ) {
		vb[icurctx].bVarsSetTarg = FALSE;
		vb[icurctx].bVarsTexSync = FALSE;
		vb[0].bVarsTexSync = FALSE;
	}
}

// Reset Targets Helper, for hack.
inline void AfterRendererAutoresetTargets() {
	if( g_GameSettings & GAME_AUTORESET ) {
		s_nResolveCounts[s_nCurResolveIndex] = s_nResolved;
		s_nCurResolveIndex = (s_nCurResolveIndex+1)%ARRAY_SIZE(s_nResolveCounts);

		int total = 0;
		for(int i = 0; i < ARRAY_SIZE(s_nResolveCounts); ++i) total += s_nResolveCounts[i];

		if( total / ARRAY_SIZE(s_nResolveCounts) > 3 ) {
			if( s_nLastResolveReset > (int)(fFPS * 8) ) {
				// reset
				ERROR_LOG("video mem reset\n");
				s_nLastResolveReset = 0;
				memset(s_nResolveCounts, 0, sizeof(s_nResolveCounts));

				s_RTs.ResolveAll();
		return;
				s_RTs.Destroy();
				s_DepthRTs.ResolveAll();
				s_DepthRTs.Destroy();

				vb[0].prndr = NULL; vb[0].pdepth = NULL; vb[0].bNeedFrameCheck = 1; vb[0].bNeedZCheck = 1;
				vb[1].prndr = NULL; vb[1].pdepth = NULL; vb[1].bNeedFrameCheck = 1; vb[1].bNeedZCheck = 1;
			}
		}

		s_nLastResolveReset++;
	}

	if( s_nResolved > 8 ) s_nResolved = 2;
	else if( s_nResolved > 0 ) --s_nResolved;
}

int count = 0;
// The main renderer function
void ZeroGS::RenderCRTC(int interlace)
{
	if( g_bIsLost ) return;
	if (FrameSkippingHelper()) return;

	u32 bInterlace = SMODE2->INT && SMODE2->FFMD && (conf.interlace < 2);
	RenderStartHelper(bInterlace);
	bool bUsingStencil = 0;

	tex0Info dispinfo[2];
        FrameObtainDispinfo(bInterlace, dispinfo);

	// start from the last circuit
	for(int i = !PMODE->SLBG; i >= 0; --i) {

		tex0Info& texframe = dispinfo[i];
		if( texframe.th <= 1 )
			continue;

		if (SMODE2->INT && SMODE2->FFMD)
			texframe.th >>= 1;		

		if( i == 0 ) 
			RenderSetupBlending();
		
		if( bUsingStencil ) 
			RenderSetupStencil(i);

		if( texframe.psm == 0x12 ) {
			RenderCRTC24helper(bInterlace, interlace, texframe.psm);
			continue;
		}
	
		// We shader targets between two functions, so declare it here;
		list<CRenderTarget*> listTargs; 

		// if we could not draw image from target's do it from memory
		if ( !RenderCheckForTargets(texframe, listTargs, i, &bUsingStencil, interlace, bInterlace) )
			RenderCheckForMemory(texframe, listTargs, interlace, bInterlace);
	}

	GL_REPORT_ERRORD();
		
	glDisable(GL_BLEND);
	
	AfterRendererUnimportantJob();
	AfterRendererSwitchBackToTextures();
	AfterRendererAutoresetTargets();
}