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https://gitea.wildfiregames.com/0ad/0ad
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6bc33fe8bd
Support conditional expressions in shader effect XML files. Consolidate fixed-function model rendering into the shader system. Remove lots of now-obsolete renderer code. Move shader defines from std::map to new class with interned data, for performance. Move texture from model into material. Alleviate singletonitis. Remove obsolete lodbias setting. Remove unused terrain shadow transparency. This was SVN commit r11423.
147 lines
4.4 KiB
C++
147 lines
4.4 KiB
C++
/* Copyright (C) 2012 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* RenderModifiers can affect the fragment stage behaviour of some
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* ModelRenderers. This file defines some common RenderModifiers in
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* addition to the base class.
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*
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* TODO: See comment in CRendererInternals::Models - we no longer use multiple
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* subclasses of RenderModifier, so most of the stuff here is unnecessary
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* abstraction which should probably be cleaned up.
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*/
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#ifndef INCLUDED_RENDERMODIFIERS
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#define INCLUDED_RENDERMODIFIERS
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#include "ModelRenderer.h"
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#include "graphics/ShaderTechnique.h"
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#include "graphics/Texture.h"
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class CLightEnv;
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class CMatrix3D;
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class CModel;
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class ShadowMap;
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/**
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* Class RenderModifier: Some ModelRenderer implementations provide vertex
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* management behaviour but allow fragment stages to be modified by a plugged in
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* RenderModifier.
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*
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* You should use RenderModifierPtr when referencing RenderModifiers.
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*/
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class RenderModifier
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{
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public:
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RenderModifier() { }
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virtual ~RenderModifier() { }
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/**
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* BeginPass: Setup OpenGL for the given rendering pass.
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*
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* Must be implemented by derived classes.
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*
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* @param pass The current pass number (pass == 0 is the first pass)
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*
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* @return The streamflags that indicate which vertex components
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* are required by the fragment stages (see STREAM_XYZ constants).
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*/
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virtual void BeginPass(const CShaderProgramPtr& shader) = 0;
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/**
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* PrepareTexture: Called before rendering models that use the given
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* texture.
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*
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* Must be implemented by derived classes.
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*
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* @param pass The current pass number (pass == 0 is the first pass)
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* @param texture The texture used by subsequent models
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*/
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virtual void PrepareTexture(const CShaderProgramPtr& shader, CTexture& texture) = 0;
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/**
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* PrepareModel: Called before rendering the given model.
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*
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* Default behaviour does nothing.
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*
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* @param pass The current pass number (pass == 0 is the first pass)
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* @param model The model that is about to be rendered.
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*/
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virtual void PrepareModel(const CShaderProgramPtr& shader, CModel* model) = 0;
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};
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/**
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* Class LitRenderModifier: Abstract base class for RenderModifiers that apply
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* a shadow map.
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* LitRenderModifiers expect the diffuse brightness in the primary color (instead of ambient + diffuse).
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*/
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class LitRenderModifier : public RenderModifier
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{
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public:
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LitRenderModifier();
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~LitRenderModifier();
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/**
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* SetShadowMap: Set the shadow map that will be used for rendering.
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* Must be called by the user of the RenderModifier.
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*
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* The shadow map must be non-null and use depth texturing, or subsequent rendering
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* using this RenderModifier will fail.
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*
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* @param shadow the shadow map
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*/
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void SetShadowMap(const ShadowMap* shadow);
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/**
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* SetLightEnv: Set the light environment that will be used for rendering.
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* Must be called by the user of the RenderModifier.
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*
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* @param lightenv the light environment (must be non-null)
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*/
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void SetLightEnv(const CLightEnv* lightenv);
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const ShadowMap* GetShadowMap() const { return m_Shadow; }
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const CLightEnv* GetLightEnv() const { return m_LightEnv; }
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private:
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const ShadowMap* m_Shadow;
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const CLightEnv* m_LightEnv;
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};
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/**
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* A RenderModifier that sets uniforms and textures appropriately for rendering models.
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*/
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class ShaderRenderModifier : public LitRenderModifier
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{
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public:
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ShaderRenderModifier();
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// Implementation
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void BeginPass(const CShaderProgramPtr& shader);
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void PrepareTexture(const CShaderProgramPtr& shader, CTexture& texture);
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void PrepareModel(const CShaderProgramPtr& shader, CModel* model);
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private:
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CShaderProgram::Binding m_BindingInstancingTransform;
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CShaderProgram::Binding m_BindingShadingColor;
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CShaderProgram::Binding m_BindingObjectColor;
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CShaderProgram::Binding m_BindingPlayerColor;
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CShaderProgram::Binding m_BindingBaseTex;
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};
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#endif // INCLUDED_RENDERMODIFIERS
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