dolphin/Source/Plugins/Plugin_VideoDX9/Src/VertexManager.cpp

// Copyright (C) 2003 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 "Common.h"
#include "FileUtil.h"

#include "D3DBase.h"

#include "Statistics.h"
#include "Profiler.h"
#include "VertexManager.h"
#include "OpcodeDecoding.h"
#include "IndexGenerator.h"
#include "VertexShaderManager.h"
#include "VertexShaderCache.h"
#include "PixelShaderManager.h"
#include "PixelShaderCache.h"
#include "Utils.h"
#include "NativeVertexFormat.h"
#include "NativeVertexWriter.h"
#include "TextureCache.h"

#include "BPStructs.h"
#include "XFStructs.h"

#include "debugger/debugger.h"


using namespace D3D;

// internal state for loading vertices
extern NativeVertexFormat *g_nativeVertexFmt;

namespace VertexManager
{

static IndexGenerator2 indexGen;

static int lastPrimitive;

static u8 *LocalVBuffer;   
static u16 *TIBuffer;
static u16 *LIBuffer;  
static u16 *PIBuffer;  
#define MAXVBUFFERSIZE 0x50000
#define MAXIBUFFERSIZE 0xFFFF

void CreateDeviceObjects();
void DestroyDeviceObjects();

bool Init()
{
	LocalVBuffer = new u8[MAXVBUFFERSIZE];
	TIBuffer = new u16[MAXIBUFFERSIZE];
	LIBuffer = new u16[MAXIBUFFERSIZE];
	PIBuffer = new u16[MAXIBUFFERSIZE];
	s_pCurBufferPointer = LocalVBuffer;
	indexGen.Start(TIBuffer,LIBuffer,PIBuffer);	
	return true;
}

void ResetBuffer()
{
	s_pCurBufferPointer = LocalVBuffer;	
	indexGen.Start(TIBuffer,LIBuffer,PIBuffer);
}

void Shutdown()
{
	DestroyDeviceObjects();
	delete [] LocalVBuffer;
	delete [] TIBuffer;
	delete [] LIBuffer;
	delete [] PIBuffer;	
	ResetBuffer();
}

void CreateDeviceObjects()
{
	
}

void DestroyDeviceObjects()
{
}

void AddIndices(int _primitive, int _numVertices)
{
	switch (_primitive)
	{
	case GX_DRAW_QUADS:          indexGen.AddQuads(_numVertices);     return;    
	case GX_DRAW_TRIANGLES:      indexGen.AddList(_numVertices);      return;    
	case GX_DRAW_TRIANGLE_STRIP: indexGen.AddStrip(_numVertices);     return;
	case GX_DRAW_TRIANGLE_FAN:   indexGen.AddFan(_numVertices);       return;
	case GX_DRAW_LINE_STRIP:     indexGen.AddLineStrip(_numVertices); return;
	case GX_DRAW_LINES:		     indexGen.AddLineList(_numVertices);  return;
	case GX_DRAW_POINTS:         indexGen.AddPoints(_numVertices);    return;
	}
}



int GetRemainingSize()
{
	return  MAXVBUFFERSIZE - (int)(s_pCurBufferPointer - LocalVBuffer);
}

void AddVertices(int _primitive, int _numVertices)
{
	if (_numVertices < 0)
		return;
	switch (_primitive)
	{
		case GX_DRAW_QUADS:          
		case GX_DRAW_TRIANGLES:      
		case GX_DRAW_TRIANGLE_STRIP: 
		case GX_DRAW_TRIANGLE_FAN:   
			if(MAXIBUFFERSIZE - indexGen.GetTriangleindexLen() < 2 * _numVertices)
			Flush();
			break;
		case GX_DRAW_LINE_STRIP:
		case GX_DRAW_LINES:
			if(MAXIBUFFERSIZE - indexGen.GetLineindexLen() < 2 * _numVertices)
			Flush();
			break;
		case GX_DRAW_POINTS:
			if(MAXIBUFFERSIZE - indexGen.GetPointindexLen() < _numVertices)
			Flush();
			break;
		default: return;
	}
	lastPrimitive = _primitive;	
	ADDSTAT(stats.thisFrame.numPrims, _numVertices);
	INCSTAT(stats.thisFrame.numPrimitiveJoins);
	AddIndices(_primitive, _numVertices);
}

inline void Draw(int numVertices, int stride)
{
	if(indexGen.GetNumTriangles() > 0)
	{
		if (FAILED(D3D::dev->DrawIndexedPrimitiveUP(
				D3DPT_TRIANGLELIST, 
				0, indexGen.GetNumVerts(), indexGen.GetNumTriangles(),
				TIBuffer,
				D3DFMT_INDEX16,
				LocalVBuffer,
				stride))) 
			{
#if defined(_DEBUG) || defined(DEBUGFAST)
				std::string error_shaders;
				error_shaders.append(VertexShaderCache::GetCurrentShaderCode());
				error_shaders.append(PixelShaderCache::GetCurrentShaderCode());
				File::WriteStringToFile(true, error_shaders, "bad_shader_combo.txt");
				PanicAlert("DrawIndexedPrimitiveUP failed. Shaders written to bad_shader_combo.txt.");
#endif
			}
		INCSTAT(stats.thisFrame.numIndexedDrawCalls);
	}
	if(indexGen.GetNumLines() > 0)
	{
		if (FAILED(D3D::dev->DrawIndexedPrimitiveUP(
				D3DPT_LINELIST, 
				0, indexGen.GetNumVerts(), indexGen.GetNumLines(),
				LIBuffer,
				D3DFMT_INDEX16,
				LocalVBuffer,
				stride))) 
			{
#if defined(_DEBUG) || defined(DEBUGFAST)
				std::string error_shaders;
				error_shaders.append(VertexShaderCache::GetCurrentShaderCode());
				error_shaders.append(PixelShaderCache::GetCurrentShaderCode());
				File::WriteStringToFile(true, error_shaders, "bad_shader_combo.txt");
				PanicAlert("DrawIndexedPrimitiveUP failed. Shaders written to bad_shader_combo.txt.");
#endif
			}
		INCSTAT(stats.thisFrame.numIndexedDrawCalls);
	}
	if(indexGen.GetNumPoints() > 0)
	{
		if (FAILED(D3D::dev->DrawIndexedPrimitiveUP(
				D3DPT_POINTLIST, 
				0, indexGen.GetNumVerts(), indexGen.GetNumPoints(),
				PIBuffer,
				D3DFMT_INDEX16,
				LocalVBuffer,
				stride))) 
			{
#if defined(_DEBUG) || defined(DEBUGFAST)
				std::string error_shaders;
				error_shaders.append(VertexShaderCache::GetCurrentShaderCode());
				error_shaders.append(PixelShaderCache::GetCurrentShaderCode());
				File::WriteStringToFile(true, error_shaders, "bad_shader_combo.txt");
				PanicAlert("DrawIndexedPrimitiveUP failed. Shaders written to bad_shader_combo.txt.");
#endif
			}
		INCSTAT(stats.thisFrame.numIndexedDrawCalls);
	}	
}

void Flush()
{
	if (LocalVBuffer == s_pCurBufferPointer) return;	
	int numVerts = indexGen.GetNumVerts();
	if(numVerts == 0) return;

	DVSTARTPROFILE();
	
		u32 usedtextures = 0;
		for (u32 i = 0; i < (u32)bpmem.genMode.numtevstages + 1; ++i) {
			if (bpmem.tevorders[i/2].getEnable(i & 1))
				usedtextures |= 1 << bpmem.tevorders[i/2].getTexMap(i & 1);
		}

		if (bpmem.genMode.numindstages > 0) {
			for (u32 i = 0; i < (u32)bpmem.genMode.numtevstages + 1; ++i) {
				if (bpmem.tevind[i].IsActive() && bpmem.tevind[i].bt < bpmem.genMode.numindstages) {
					usedtextures |= 1 << bpmem.tevindref.getTexMap(bpmem.tevind[i].bt);
				}
			}
		}

		u32 nonpow2tex = 0;
		for (int i = 0; i < 8; i++)
		{
			if (usedtextures & (1 << i)) {
				FourTexUnits &tex = bpmem.tex[i >> 2];
				TextureCache::TCacheEntry* tentry = TextureCache::Load(i, 
					(tex.texImage3[i&3].image_base/* & 0x1FFFFF*/) << 5,
					tex.texImage0[i&3].width+1, tex.texImage0[i&3].height+1,
					tex.texImage0[i&3].format, tex.texTlut[i&3].tmem_offset<<9, 
					tex.texTlut[i&3].tlut_format);

				if (tentry) {
					PixelShaderManager::SetTexDims(i, tentry->w, tentry->h, 0, 0);
				}
				else
				{
					DEBUGGER_PAUSE_LOG_AT(NEXT_ERROR,true,{printf("Fail to load texture\n");});
					ERROR_LOG(VIDEO, "error loading texture");
				}
			}
		}
		PixelShaderManager::SetTexturesUsed(0);

		int numVertices = indexGen.GetNumVerts();
		if (numVertices)
		{
			// set global constants
			VertexShaderManager::SetConstants();
			PixelShaderManager::SetConstants();

			if (!PixelShaderCache::SetShader(false))
			{
				DEBUGGER_PAUSE_LOG_AT(NEXT_ERROR,true,{printf("Fail to set pixel shader\n");});
				goto shader_fail;
			}
			if (!VertexShaderCache::SetShader(g_nativeVertexFmt->m_components))
			{
				DEBUGGER_PAUSE_LOG_AT(NEXT_ERROR,true,{printf("Fail to set vertex shader\n");});
				goto shader_fail;

			}

			int stride = g_nativeVertexFmt->GetVertexStride();
			g_nativeVertexFmt->SetupVertexPointers();

			Draw(numVertices, stride);

			if (bpmem.dstalpha.enable && bpmem.blendmode.alphaupdate) 
			{
				DWORD write = 0;
				if (!PixelShaderCache::SetShader(true))
				{
					DEBUGGER_PAUSE_LOG_AT(NEXT_ERROR,true,{printf("Fail to set pixel shader\n");});
					goto shader_fail;
				}

				// update alpha only
				D3D::SetRenderState(D3DRS_COLORWRITEENABLE, D3DCOLORWRITEENABLE_ALPHA);
				D3D::SetRenderState(D3DRS_ALPHABLENDENABLE, false);

				Draw(numVertices, stride);

				if (bpmem.blendmode.alphaupdate) 
					write = D3DCOLORWRITEENABLE_ALPHA;
				if (bpmem.blendmode.colorupdate) 
					write |= D3DCOLORWRITEENABLE_RED | D3DCOLORWRITEENABLE_GREEN | D3DCOLORWRITEENABLE_BLUE;
				if (bpmem.blendmode.blendenable || bpmem.blendmode.subtract)
					D3D::SetRenderState(D3DRS_ALPHABLENDENABLE, true);

				D3D::SetRenderState(D3DRS_COLORWRITEENABLE, write);
			}
			DEBUGGER_PAUSE_AT(NEXT_FLUSH,true);

shader_fail:
		ResetBuffer();
	}
}

}  // namespace