Deferred Shading update

-Deferred Shading now use a dynamics pass system
-Forward Shading is now capable of rendering more than three lights
(Multipass)


Former-commit-id: 74ed0b998d72aa9eb3bd2aab938a75985ebb2bf6

src/Nazara/Graphics/DeferredFinalPass.cpp

@@ -0,0 +1,85 @@
+// Copyright (C) 2013 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Graphics/DeferredFinalPass.hpp>
+#include <Nazara/Graphics/AbstractViewer.hpp>
+#include <Nazara/Graphics/Scene.hpp>
+#include <Nazara/Renderer/Renderer.hpp>
+#include <Nazara/Renderer/RenderTexture.hpp>
+#include <memory>
+#include <Nazara/Graphics/Debug.hpp>
+
+namespace
+{
+	NzShaderProgram* BuildBlitProgram()
+	{
+		const nzUInt8 fragmentSource[] = {
+			#include <Nazara/Graphics/Resources/DeferredShading/Shaders/Blit.frag.h>
+		};
+
+		const char* vertexSource =
+		"#version 140\n"
+
+		"in vec3 VertexPosition;\n"
+
+		"void main()\n"
+		"{\n"
+		"\t" "gl_Position = vec4(VertexPosition, 1.0);" "\n"
+		"}\n";
+
+		///TODO: Remplacer ça par des ShaderNode
+		std::unique_ptr<NzShaderProgram> program(new NzShaderProgram(nzShaderLanguage_GLSL));
+		program->SetPersistent(false);
+
+		if (!program->LoadShader(nzShaderType_Fragment, NzString(reinterpret_cast<const char*>(fragmentSource), sizeof(fragmentSource))))
+		{
+			NazaraError("Failed to load fragment shader");
+			return nullptr;
+		}
+
+		if (!program->LoadShader(nzShaderType_Vertex, vertexSource))
+		{
+			NazaraError("Failed to load vertex shader");
+			return nullptr;
+		}
+
+		if (!program->Compile())
+		{
+			NazaraError("Failed to compile program");
+			return nullptr;
+		}
+
+		return program.release();
+	}
+}
+
+NzDeferredFinalPass::NzDeferredFinalPass()
+{
+	m_program = BuildBlitProgram();
+	m_program->SendInteger(m_program->GetUniformLocation("ColorTexture"), 0);
+
+	m_pointSampler.SetAnisotropyLevel(1);
+	m_pointSampler.SetFilterMode(nzSamplerFilter_Nearest);
+	m_pointSampler.SetWrapMode(nzSamplerWrap_Clamp);
+
+	m_states.parameters[nzRendererParameter_DepthBuffer] = false;
+}
+
+NzDeferredFinalPass::~NzDeferredFinalPass() = default;
+
+bool NzDeferredFinalPass::Process(const NzScene* scene, unsigned int firstWorkTexture, unsigned secondWorkTexture) const
+{
+	NazaraUnused(firstWorkTexture);
+
+	scene->GetViewer()->ApplyView();
+
+	NzRenderer::SetRenderStates(m_states);
+	NzRenderer::SetShaderProgram(m_program);
+	NzRenderer::SetTexture(0, m_workTextures[secondWorkTexture]);
+	NzRenderer::SetTextureSampler(0, m_pointSampler);
+
+	NzRenderer::DrawFullscreenQuad();
+
+	return false;
+}