// Copyright (C) 2003-2008 Dolphin Project.

// 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, version 2.0.

// 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 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include <list>
#include <d3dx9.h>

#include "Common.h"
#include "Statistics.h"

#include "Config.h"
#include "main.h"
#include "VertexManager.h"
#include "Render.h"
#include "OpcodeDecoding.h"
#include "BPStructs.h"
#include "XFStructs.h"
#include "D3DPostprocess.h"
#include "D3DUtil.h"
#include "VertexShaderManager.h"
#include "PixelShaderManager.h"
#include "VertexShaderCache.h"
#include "PixelShaderCache.h"
#include "TextureCache.h"
#include "Utils.h"
#include "EmuWindow.h"

#include <Cg/cg.h>
#include <Cg/cgD3D9.h>

CGcontext g_cgcontext;
CGprofile g_cgvProf;
CGprofile g_cgfProf;

float Renderer::m_x;
float Renderer::m_y;
float Renderer::m_width;
float Renderer::m_height;
float Renderer::xScale;
float Renderer::yScale;

std::vector<LPDIRECT3DBASETEXTURE9> Renderer::m_Textures;

DWORD Renderer::m_RenderStates[MaxRenderStates+46];
DWORD Renderer::m_TextureStageStates[MaxTextureStages][MaxTextureTypes];
DWORD Renderer::m_SamplerStates[MaxSamplerSize][MaxSamplerTypes];
DWORD Renderer::m_FVF;

#define NUMWNDRES 6
extern int g_Res[NUMWNDRES][2];

struct Message
{
	Message(const std::string &msg, u32 dw) : message(msg), dwTimeStamp(dw) { }
	std::string message;
    u32 dwTimeStamp;
};

static std::list<Message> s_listMsgs;

void HandleCgError(CGcontext ctx, CGerror err, void* appdata)
{
	if(!g_Config.bShowShaderErrors)
		return;

	PanicAlert("Cg error: %s\n", cgGetErrorString(err));
	const char* listing = cgGetLastListing(g_cgcontext);
	if (listing != NULL) {
		PanicAlert("last listing: %s\n", listing);
	}
}

void Renderer::Init(SVideoInitialize &_VideoInitialize) 
{
    EmuWindow::SetSize(g_Res[g_Config.iWindowedRes][0], g_Res[g_Config.iWindowedRes][1]);

    D3D::Create(g_Config.iAdapter, EmuWindow::GetWnd(), g_Config.bFullscreen, g_Config.iFSResolution, g_Config.iMultisampleMode);
	g_cgcontext = cgCreateContext();

	cgGetError();
	cgSetErrorHandler(HandleCgError, NULL);
	cgD3D9SetDevice(D3D::dev);
	g_cgvProf = cgD3D9GetLatestVertexProfile();
	g_cgfProf = cgD3D9GetLatestPixelProfile();

	float width =  (float)D3D::GetDisplayWidth();
	float height = (float)D3D::GetDisplayHeight();

	m_x = 0;
	m_y = 0;
	m_width  = width;
	m_height = height;
	xScale = width / (float)EFB_WIDTH;
	yScale = height / (float)EFB_HEIGHT;

	// We're not using much fixed function. Let's just set the matrices to identity.
	D3DXMATRIX mtx;
	D3DXMatrixIdentity(&mtx);
	D3D::dev->SetTransform(D3DTS_VIEW, &mtx);
	D3D::dev->SetTransform(D3DTS_WORLD, &mtx);


	D3D::font.Init();
	Initialize();
}

void Renderer::Shutdown()
{
	cgD3D9SetDevice(NULL);
	cgDestroyContext(g_cgcontext);
	g_cgcontext = NULL;

	D3D::font.Shutdown();
	D3D::EndFrame();
	D3D::Close();
}

void Renderer::Initialize()
{
	m_FVF = 0;
	m_Textures.reserve(MaxTextureStages);
	for (int i = 0; i < MaxTextureStages; i++)
		m_Textures.push_back(NULL);
	for (int i = 0; i < 8; i++)
		D3D::dev->SetSamplerState(i, D3DSAMP_MAXANISOTROPY, 16);

	Postprocess::Initialize();
	Postprocess::BeginFrame();
	D3D::BeginFrame(true, 0);
	VertexManager::BeginFrame();
}

void Renderer::AddMessage(const std::string &message, u32 ms)
{
    s_listMsgs.push_back(Message(message, timeGetTime()+ms));
}

void Renderer::ProcessMessages()
{
	if (s_listMsgs.size() > 0)
	{
        int left = 25, top = 15;
		std::list<Message>::iterator it = s_listMsgs.begin();
        
        while (it != s_listMsgs.end()) 
		{
			int time_left = (int)(it->dwTimeStamp - timeGetTime());
			int alpha = 255;

			if (time_left<1024)
			{
				alpha=time_left>>2;
				if (time_left<0) alpha=0;
			}

			alpha <<= 24;

            RenderText(it->message, left+1, top+1, 0x000000|alpha);
            RenderText(it->message, left, top, 0xffff30|alpha);
            top += 15;

            if (time_left <= 0)
                it = s_listMsgs.erase(it);
            else ++it;
        }
    }
}

void Renderer::RenderText(const std::string &text, int left, int top, u32 color)
{
	D3D::font.DrawTextScaled((float)left, (float)top, 20, 20, 0.0f, color, text.c_str(), false);
}

void dumpMatrix(D3DXMATRIX &mtx)
{
	for (int y = 0; y < 4; y++)
	{
		char temp[256];
		sprintf(temp,"%4.4f %4.4f %4.4f %4.4f",mtx.m[y][0],mtx.m[y][1],mtx.m[y][2],mtx.m[y][3]);
		g_VideoInitialize.pLog(temp, FALSE);
	}
}

void Renderer::SwapBuffers()
{
	// Center window again.
	if (EmuWindow::GetParentWnd())
	{
		RECT rcWindow;
		GetWindowRect(EmuWindow::GetParentWnd(), &rcWindow);

		int width = rcWindow.right - rcWindow.left;
		int height = rcWindow.bottom - rcWindow.top;

		::MoveWindow(EmuWindow::GetWnd(), 0, 0, width, height, FALSE);
	}

	//Finish up the current frame, print some stats
	Postprocess::FinalizeFrame();
	if (g_Config.bOverlayStats)
	{
		char st[2048];
		char *p = st;
		p+=sprintf(p,"textures created: %i\n",stats.numTexturesCreated);
		p+=sprintf(p,"textures alive: %i\n",stats.numTexturesAlive);
		p+=sprintf(p,"pshaders created: %i\n",stats.numPixelShadersCreated);
		p+=sprintf(p,"pshaders alive: %i\n",stats.numPixelShadersAlive);
		p+=sprintf(p,"vshaders created: %i\n",stats.numVertexShadersCreated);
		p+=sprintf(p,"vshaders alive: %i\n",stats.numVertexShadersAlive);
		p+=sprintf(p,"dlists called: %i\n",stats.numDListsCalled);
		p+=sprintf(p,"dlists created: %i\n",stats.numDListsCreated);
		p+=sprintf(p,"dlists alive: %i\n",stats.numDListsAlive);
		p+=sprintf(p,"primitives: %i\n",stats.thisFrame.numPrims);
		p+=sprintf(p,"primitive joins: %i\n",stats.thisFrame.numPrimitiveJoins);
		p+=sprintf(p,"primitives (DL): %i\n",stats.thisFrame.numDLPrims);
		p+=sprintf(p,"XF loads: %i\n",stats.thisFrame.numXFLoads);
		p+=sprintf(p,"XF loads (DL): %i\n",stats.thisFrame.numXFLoadsInDL);
		p+=sprintf(p,"CP loads: %i\n",stats.thisFrame.numCPLoads);
		p+=sprintf(p,"CP loads (DL): %i\n",stats.thisFrame.numCPLoadsInDL);
		p+=sprintf(p,"BP loads: %i\n",stats.thisFrame.numBPLoads);
		p+=sprintf(p,"BP loads (DL): %i\n",stats.thisFrame.numBPLoadsInDL);
		p+=sprintf(p,"Vertex Loaders: %i\n",stats.numVertexLoaders);

		D3D::font.DrawTextScaled(0,30,20,20,0.0f,0xFF00FFFF,st,false);

		//end frame
	}

	ProcessMessages();

#if defined(DVPROFILE)
    if (g_bWriteProfile) {
        //g_bWriteProfile = 0;
        static int framenum = 0;
        const int UPDATE_FRAMES = 8;
        if (++framenum >= UPDATE_FRAMES) {
            DVProfWrite("prof.txt", UPDATE_FRAMES);
            DVProfClear();
            framenum = 0;
        }
    }
#endif

	D3D::EndFrame();
	//D3D frame is now over
	//////////////////////////////////////////////////////////////////////////
	
	//clean out old stuff from caches
	frameCount++;
	PixelShaderCache::Cleanup();
	VertexShaderCache::Cleanup();
	TextureCache::Cleanup();

	//////////////////////////////////////////////////////////////////////////
	//Begin new frame
	//Set default viewport and scissor, for the clear to work correctly
	stats.ResetFrame();
	D3DVIEWPORT9 vp;
	vp.X = 0;
	vp.Y = 0;
	vp.Width  = (DWORD)m_width;
	vp.Height = (DWORD)m_height;
	vp.MinZ = 0;
	vp.MaxZ = 0;
	D3D::dev->SetViewport(&vp);
	RECT rc;
	rc.left   = 0; 
	rc.top    = 0;
	rc.right  = (LONG)m_width;
	rc.bottom = (LONG)m_height;
	D3D::dev->SetScissorRect(&rc);
	D3D::dev->SetRenderState(D3DRS_SCISSORTESTENABLE, false);

	D3D::dev->Clear(0, 0, D3DCLEAR_TARGET, 0x101010, 0, 0);
	u32 clearColor = (bpmem.clearcolorAR << 16) | bpmem.clearcolorGB;
//	clearColor |= 0x003F003F;
//	D3D::BeginFrame(true,clearColor,1.0f);
	D3D::BeginFrame(false, clearColor, 1.0f);
	// D3D::EnableAlphaToCoverage();

	Postprocess::BeginFrame();
	VertexManager::BeginFrame();

	if (g_Config.bOldCard)
		D3D::font.SetRenderStates(); //compatibility with low end cards
}

/*
void Renderer::SetViewport(float* _Viewport)
{
	Viewport* pViewport = (Viewport*)_Viewport;
	D3DVIEWPORT9 vp;
	float x=(pViewport->xOrig-662)*2;
	float y=(pViewport->yOrig-582)*2; //something is wrong, but what??
	y-=16;

	float w=pViewport->wd*2;  //multiply up to real size 
	float h=pViewport->ht*-2; //why is this negative? oh well..

	if (x < 0.0f) x = 0.0f;
	if (y < 0.0f) y = 0.0f;
	if (x > 640.0f) x = 639.0f;
	if (y > 480.0f) y = 479.0f;
	if (w < 0) w = 0;
	if (h < 0) h = 0;
	if (x+w > 640.0f) w=640-x;
	if (y+h > 480.0f) h=480-y;
	//x=y=0;
	//if (w>0.0f) w=0.0f;
	//if (h<0.0f) h=0.0f;

	vp.X = (DWORD)(x*xScale);
	vp.Y = (DWORD)(y*yScale);
	vp.Width = (DWORD)(w*xScale);
	vp.Height = (DWORD)(h*yScale);
	vp.MinZ = 0.0f;
	vp.MaxZ = 1.0f;

//	char temp[256];
//	sprintf(temp,"Viewport: %i %i %i %i %f %f",vp.X,vp.Y,vp.Width,vp.Height,vp.MinZ,vp.MaxZ);
//	g_VideoInitialize.pLog(temp, FALSE);

	D3D::dev->SetViewport(&vp);
}
*/


void Renderer::SetScissorRect()
{
	int xoff = bpmem.scissorOffset.x * 2 - 342;
	int yoff = bpmem.scissorOffset.y * 2 - 342;
	RECT rc;
	rc.left   = (int)((float)bpmem.scissorTL.x - xoff - 342);
	rc.top    = (int)((float)bpmem.scissorTL.y - yoff - 342);
	rc.right  = (int)((float)bpmem.scissorBR.x - xoff - 341);
	rc.bottom = (int)((float)bpmem.scissorBR.y - yoff - 341);

	rc.left   = (int)(rc.left   * xScale);
	rc.top    = (int)(rc.top    * yScale);
	rc.right  = (int)(rc.right  * xScale);
	rc.bottom = (int)(rc.bottom * yScale);
	if (rc.right >= rc.left && rc.bottom >= rc.top)
		D3D::dev->SetScissorRect(&rc);
	else
		g_VideoInitialize.pLog("SCISSOR ERROR", FALSE);
}

/*
void Renderer::SetProjection(float* pMatrix, int constantIndex)
{
	D3DXMATRIX mtx;
	if (pMatrix[6] == 0) // Perspective
	{
		mtx.m[0][0] = pMatrix[0];
		mtx.m[0][1] = 0.0f;
		mtx.m[0][2] = pMatrix[1];
		mtx.m[0][3] = 0; // -0.5f/m_height;  <-- fix d3d pixel center?
			 		
		mtx.m[1][0] = 0.0f;
		mtx.m[1][1] = pMatrix[2];
		mtx.m[1][2] = pMatrix[3];
		mtx.m[1][3] = 0; // +0.5f/m_height;  <-- fix d3d pixel center?
			 		
<<<<<<< .mine
		mtx.m[0][2] = 0.0f;
		mtx.m[1][2] = 0.0f;
		mtx.m[2][2] = -(1 - pMatrix[4]);
		mtx.m[3][2] = pMatrix[5]; 
=======
		mtx.m[2][0] = 0.0f;
		mtx.m[2][1] = 0.0f;
		mtx.m[2][2] = -(1.0f - pMatrix[4]);
		mtx.m[2][3] = pMatrix[5];  // Problematic in OGL
>>>>>>> .r2480
			 		
		mtx.m[3][0] = 0.0f;
		mtx.m[3][1] = 0.0f;
		// donkopunchstania: GC GPU rounds differently?
		// -(1 + epsilon) so objects are clipped as they are on the real HW
		mtx.m[3][2] = -1.00000011921f;
		mtx.m[3][3] = 0.0f;
	}
	else // Orthographic Projection
	{
		mtx.m[0][0] = pMatrix[0];
		mtx.m[0][1] = 0.0f;
		mtx.m[0][2] = 0.0f;
		mtx.m[0][3] = pMatrix[1]; // -0.5f/m_width;  <-- fix d3d pixel center?

		mtx.m[1][0] = 0.0f;
		mtx.m[1][1] = pMatrix[2];
		mtx.m[1][2] = 0.0f;
		mtx.m[1][3] = pMatrix[3]; // +0.5f/m_height; <-- fix d3d pixel center?

		mtx.m[2][0] = 0.0f;
		mtx.m[2][1] = 0.0f;
		mtx.m[2][2] = pMatrix[4];
		mtx.m[2][3] = -(-1.0f - pMatrix[5]);
			 		
		mtx.m[3][0] = 0;
		mtx.m[3][1] = 0;
		mtx.m[3][2] = 0.0f;
		mtx.m[3][3] = 1.0f;
	}
	D3D::dev->SetVertexShaderConstantF(constantIndex, mtx, 4);
}*/

void Renderer::SetTexture(DWORD Stage, LPDIRECT3DBASETEXTURE9 pTexture)
{
	if (m_Textures[Stage] != pTexture)
	{
		m_Textures[Stage] = pTexture;
		D3D::dev->SetTexture(Stage, pTexture);
	}
}

void Renderer::SetFVF(DWORD FVF)
{
	if (m_FVF != FVF)
	{
		m_FVF = FVF;
		D3D::dev->SetFVF(FVF);
	}
}

void Renderer::SetRenderState(D3DRENDERSTATETYPE State, DWORD Value)
{
	if (m_RenderStates[State] != Value)
	{
		m_RenderStates[State] = Value;
		D3D::dev->SetRenderState(State, Value);
	}
}

void Renderer::SetTextureStageState(DWORD Stage, D3DTEXTURESTAGESTATETYPE Type, DWORD Value)
{
	if (m_TextureStageStates[Stage][Type] != Value)
	{
		m_TextureStageStates[Stage][Type] = Value;
		D3D::dev->SetTextureStageState(Stage, Type, Value);
	}
}

void Renderer::SetSamplerState(DWORD Sampler, D3DSAMPLERSTATETYPE Type, DWORD Value)
{
	if (m_SamplerStates[Sampler][Type] != Value)
	{
		m_SamplerStates[Sampler][Type] = Value;
		D3D::dev->SetSamplerState(Sampler, Type, Value);
	}
}


// Called from VertexShaderManager
void UpdateViewport()
{
	// HACK: Update viewport causes overlay to disappear and the games to move to the 
	// bottom of the screen for some reason.
	return;
    // reversed gxsetviewport(xorig, yorig, width, height, nearz, farz)
    // [0] = width/2
    // [1] = height/2
    // [2] = 16777215 *(farz - nearz)
    // [3] = xorig + width/2 + 342
    // [4] = yorig + height/2 + 342
    // [5] = 16777215 * farz

	/*INFO_LOG("view: topleft=(%f,%f), wh=(%f,%f), z=(%f,%f)\n",
		rawViewport[3]-rawViewport[0]-342, rawViewport[4]+rawViewport[1]-342,
		2 * rawViewport[0], 2 * rawViewport[1],
		(rawViewport[5] - rawViewport[2]) / 16777215.0f, rawViewport[5] / 16777215.0f);*/
	
	D3DVIEWPORT9 vp;

	// Keep aspect ratio at 4:3
	// rawViewport[0] = 320, rawViewport[1] = -240
	int scissorXOff = bpmem.scissorOffset.x * 2 - 342;
	int scissorYOff = bpmem.scissorOffset.y * 2 - 342;
	float fourThree = 4.0f / 3.0f;
	// These were commented out to fix "unreferenced local variable" compiler warnings.
	// float wAdj, hAdj;
	// float actualRatiow, actualRatioh;
	// int overfl;
	// int actualWid, actualHei;
	int xoffs = 0;
	int yoffs = 0;
	int wid, hei;

	vp.MinZ = (xfregs.rawViewport[5] - xfregs.rawViewport[2])/16777215.0f;
	vp.MaxZ = xfregs.rawViewport[5]/16777215.0f;
	
	wid = int(ceil(fabs(2 * xfregs.rawViewport[0])));
	hei = int(ceil(fabs(2 * xfregs.rawViewport[1])));

	vp.X = (int)(xfregs.rawViewport[3] - xfregs.rawViewport[0] - 342 - scissorXOff) + xoffs;
	vp.Y = (int)(xfregs.rawViewport[4] - xfregs.rawViewport[1] - 342 - scissorYOff) + yoffs;
	vp.Width = wid;
	vp.Height = hei;

	D3D::dev->SetViewport(&vp);
}