makVrv::DtOsgShaderUtils Class Reference

Miscellaneous shader utilities for osg.

Classes
struct	CachedUniformData

Static Public Member Functions
static void	bindAttributes (const osg::GLExtensions *ext, const osg::StateSet *ss, int shader, int contextID)
static bool	getVPShaderVector (osg::StateSet *ss, osg::State &state, unsigned int &shaderHash, std::vector< unsigned int > &vertShaderVector, std::vector< unsigned int > &fragShaderVector, bool skip_shadow_shaders=false, bool skip_multiview_shaders=false)
static bool	addDegenerateShadersIfNeeded (osg::StateSet *ss, osg::State &state, std::vector< unsigned int > &vertShaderVector, std::vector< unsigned int > &fragShaderVector, bool skip_shadow_shaders=false)
static void	restoreEverything (osg::State &state)
static void	restoreOpenGLMode (const osg::State &state, int stateToSet)
static void	restoreOpenGLStateAttribute (osg::State &state, osg::StateAttribute::Type type)
static void	restoreOpenGLProgram (const osg::State &state)
static void	restoreOpenGLFBO (const osg::State &state)
static void	markAllTextureAttributesDirty (osg::State &state)
static void	generateModelInstanceShaders (osg::Node *node, const std::string &shaderName)
static unsigned	getNumGPUTextureImageUnits ()
static void	clearCachedProgramsAndUniformLocations (void)

Protected Types
typedef std::unordered_map < unsigned int, CachedUniformData >	UniformLocationMap
typedef std::unordered_map < int, UniformLocationMap >	ShaderUniLocMap

Static Protected Attributes
static ShaderUniLocMap	theShaderUniLocMap

Private Member Functions
	DtOsgShaderUtils ()=delete
	DtOsgShaderUtils (const DtOsgShaderUtils &rhs)=delete
DtOsgShaderUtils &	operator= (const DtOsgShaderUtils &rhs)=delete
virtual	~DtOsgShaderUtils ()=delete

Member Typedef Documentation

typedef std::unordered_map<unsigned int, CachedUniformData > makVrv::DtOsgShaderUtils::UniformLocationMap

protected

typedef std::unordered_map<int, UniformLocationMap> makVrv::DtOsgShaderUtils::ShaderUniLocMap

protected

Constructor & Destructor Documentation

makVrv::DtOsgShaderUtils::DtOsgShaderUtils ( )

privatedelete

not allowed

makVrv::DtOsgShaderUtils::DtOsgShaderUtils ( const DtOsgShaderUtils &  rhs )

privatedelete

not allowed

virtual makVrv::DtOsgShaderUtils::~DtOsgShaderUtils ( )

privatevirtualdelete

not allowed

Member Function Documentation

DtOsgShaderUtils& makVrv::DtOsgShaderUtils::operator= ( const DtOsgShaderUtils &  rhs )

privatedelete

not allowed

static void makVrv::DtOsgShaderUtils::bindAttributes ( const osg::GLExtensions *  ext, const osg::StateSet *  ss, int  shader, int  contextID  )

static

Loop over the uniforms of the stateset of the node and attach them to the current opengl active shader. Also loops over the texture attributes in the stateset and attaches those as well always send is used by speedtree due to bug in updating uniform.

static bool makVrv::DtOsgShaderUtils::getVPShaderVector ( osg::StateSet *  ss, osg::State &  state, unsigned int &  shaderHash, std::vector< unsigned int > &  vertShaderVector, std::vector< unsigned int > &  fragShaderVector, bool  skip_shadow_shaders = false, bool  skip_multiview_shaders = false  )

static

Collect all the active osg::Shader objects in the provided State and compile them. If they compile they are pushed onto shaderVector. shaderVector is cleared in this function so only the shaders from the State are kept. The stateset "ss" is then cleared of an update mark. Returns True if the ss was marked for an update and the shaderVector was modified.

static bool makVrv::DtOsgShaderUtils::addDegenerateShadersIfNeeded ( osg::StateSet *  ss, osg::State &  state, std::vector< unsigned int > &  vertShaderVector, std::vector< unsigned int > &  fragShaderVector, bool  skip_shadow_shaders = false  )

static

adds a degenerate shadow shader

static void makVrv::DtOsgShaderUtils::restoreEverything ( osg::State &  state )

static

static void makVrv::DtOsgShaderUtils::restoreOpenGLMode ( const osg::State &  state, int  stateToSet  )

static

restore the OpenGL mode of the state

static void makVrv::DtOsgShaderUtils::restoreOpenGLStateAttribute ( osg::State &  state, osg::StateAttribute::Type  type  )

static

restore the OpenGL state attribute

static void makVrv::DtOsgShaderUtils::restoreOpenGLProgram ( const osg::State &  state )

static

restore the OpenGL program

static void makVrv::DtOsgShaderUtils::restoreOpenGLFBO ( const osg::State &  state )

static

restore the OpenGL fbo

static void makVrv::DtOsgShaderUtils::markAllTextureAttributesDirty ( osg::State &  state )

static

mark dirty

static void makVrv::DtOsgShaderUtils::generateModelInstanceShaders ( osg::Node *  node, const std::string &  shaderName  )

static

utility function for generating shaders for vrvOsg model instances simpler than the DtOsgShaderManager::generateShaders in that it doesn't share the statesets and just runs the osgEarth::ShaderGenerator on the node. This was created solely for the purpose of removing duplicate code for model instances to setup their shaders.

static unsigned makVrv::DtOsgShaderUtils::getNumGPUTextureImageUnits ( )

static

Query the number of available texture image units for shader samplers.

static void makVrv::DtOsgShaderUtils::clearCachedProgramsAndUniformLocations ( void  )

static

delete the entries of programs to cached uniform locations must call when cloud layers are deleted, atmosphere deleted, triton drawable cleaned up.

Member Data Documentation

ShaderUniLocMap makVrv::DtOsgShaderUtils::theShaderUniLocMap

staticprotected

used to cache the shader uniform locations to avoid glGetUniformLocation calls Saves somewhere between 1-3ms and reduces variability of frame time with Triton and Silverlining Tried caching the uniform values as well but that did not seem to make a difference.

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The documentation for this class was generated from the following file:

• /data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-0-branch/include/vrvOsg/DtOsgShaderUtils.h