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107 lines
3.6 KiB
C++
107 lines
3.6 KiB
C++
#ifndef OPENMW_COMPONENTS_SHADERVISITOR_H
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#define OPENMW_COMPONENTS_SHADERVISITOR_H
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#include <osg/NodeVisitor>
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namespace Resource
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{
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class ImageManager;
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}
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namespace Shader
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{
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class ShaderManager;
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/// @brief Adjusts the given subgraph to render using shaders.
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class ShaderVisitor : public osg::NodeVisitor
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{
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public:
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ShaderVisitor(ShaderManager& shaderManager, Resource::ImageManager& imageManager, const std::string& defaultVsTemplate, const std::string& defaultFsTemplate);
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/// By default, only bump mapped objects will have a shader added to them.
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/// Setting force = true will cause all objects to render using shaders, regardless of having a bump map.
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void setForceShaders(bool force);
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/// Set whether lighting is clamped for visual compatibility with the fixed function pipeline.
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void setClampLighting(bool clamp);
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/// By default, only bump mapped objects use per-pixel lighting.
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/// Setting force = true will cause all shaders to use per-pixel lighting, regardless of having a bump map.
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void setForcePerPixelLighting(bool force);
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/// Set if we are allowed to modify StateSets encountered in the graph (default true).
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/// @par If set to false, then instead of modifying, the StateSet will be cloned and this new StateSet will be assigned to the node.
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/// @par This option is useful when the ShaderVisitor is run on a "live" subgraph that may have already been submitted for rendering.
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void setAllowedToModifyStateSets(bool allowed);
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/// Automatically use normal maps if a file with suitable name exists (see normal map pattern).
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void setAutoUseNormalMaps(bool use);
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void setNormalMapPattern(const std::string& pattern);
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void setNormalHeightMapPattern(const std::string& pattern);
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void setAutoUseSpecularMaps(bool use);
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void setSpecularMapPattern(const std::string& pattern);
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virtual void apply(osg::Node& node);
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virtual void apply(osg::Drawable& drawable);
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virtual void apply(osg::Geometry& geometry);
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void applyStateSet(osg::ref_ptr<osg::StateSet> stateset, osg::Node& node);
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void pushRequirements(osg::Node& node);
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void popRequirements();
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private:
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bool mForceShaders;
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bool mClampLighting;
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bool mForcePerPixelLighting;
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bool mAllowedToModifyStateSets;
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bool mAutoUseNormalMaps;
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std::string mNormalMapPattern;
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std::string mNormalHeightMapPattern;
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bool mAutoUseSpecularMaps;
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std::string mSpecularMapPattern;
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ShaderManager& mShaderManager;
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Resource::ImageManager& mImageManager;
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struct ShaderRequirements
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{
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ShaderRequirements();
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~ShaderRequirements();
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// <texture stage, texture name>
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std::map<int, std::string> mTextures;
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bool mShaderRequired;
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bool mColorMaterial;
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// osg::Material::ColorMode
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int mVertexColorMode;
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bool mMaterialOverridden;
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bool mNormalHeight; // true if normal map has height info in alpha channel
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// -1 == no tangents required
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int mTexStageRequiringTangents;
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// the Node that requested these requirements
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osg::Node* mNode;
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};
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std::vector<ShaderRequirements> mRequirements;
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std::string mDefaultVsTemplate;
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std::string mDefaultFsTemplate;
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void createProgram(const ShaderRequirements& reqs);
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bool adjustGeometry(osg::Geometry& sourceGeometry, const ShaderRequirements& reqs);
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};
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}
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#endif
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