OGRE-Next  3.0.0unstable
Object-Oriented Graphics Rendering Engine
Ogre::GLSLESProgramPipeline Class Reference

Specialisation of GLSLESProgramCommon to provide support for separable programs via the Open GL program pipeline. More...

#include <OgreGLSLESProgramPipeline.h>

+ Inheritance diagram for Ogre::GLSLESProgramPipeline:

Public Member Functions

 GLSLESProgramPipeline (GLSLESShader *vertexProgram, GLSLESShader *fragmentProgram)
 Constructor should only be used by GLSLESProgramPipelineManager. More...
 
virtual ~GLSLESProgramPipeline ()
 
void activate ()
 Makes a program pipeline object active by making sure it is linked and then putting it in use. More...
 
GLint getAttributeIndex (VertexElementSemantic semantic, uint index)
 Get the index of a non-standard attribute bound in the linked code. More...
 
GLuint getGLProgramPipelineHandle () const
 GL Program Pipeline Handle. More...
 
void updatePassIterationUniforms (GpuProgramParametersSharedPtr params)
 Updates program pipeline object uniforms using data from pass iteration GpuProgramParameters. More...
 
void updateUniformBlocks (GpuProgramParametersSharedPtr params, uint16 mask, GpuProgramType fromProgType)
 Updates program object uniform blocks using shared parameter data from GpuProgramParameters. More...
 
void updateUniforms (GpuProgramParametersSharedPtr params, uint16 mask, GpuProgramType fromProgType)
 Updates program pipeline object uniforms using named and indexed parameter data from GpuProgramParameters. More...
 
- Public Member Functions inherited from Ogre::GLSLESProgramCommon
 GLSLESProgramCommon (GLSLESShader *vertexProgram, GLSLESShader *fragmentProgram)
 Constructor should only be used by GLSLESLinkProgramManager and GLSLESProgramPipelineManager. More...
 
virtual ~GLSLESProgramCommon ()
 
virtual void extractLayoutQualifiers ()
 Finds layout qualifiers in the shader source and sets attribute indices appropriately. More...
 
GLint getBaseInstanceLocation () const
 
GLSLESShadergetFragmentShader () const
 
GLuint getGLProgramHandle () const
 Get the GL Handle for the program object. More...
 
GLSLESShadergetVertexShader () const
 
bool isAttributeValid (VertexElementSemantic semantic, uint index)
 Is a non-standard attribute bound in the linked code? More...
 
bool isSkeletalAnimationIncluded () const
 Returns whether the linked program includes the required instructions to perform skeletal animation. More...
 
void setSkeletalAnimationIncluded (bool included)
 Sets whether the linked program includes the required instructions to perform skeletal animation. More...
 

Detailed Description

Specialisation of GLSLESProgramCommon to provide support for separable programs via the Open GL program pipeline.

Separable programs consist of shader objects which have been individually linked. This allows for individual shaders in a program pipeline to be swapped without recompiling the program object, as would be necessary with monolithic programs. This is especially useful in the common case of only entities which change only a few of the shaders in the pipeline while leaving the rest the same.

Remarks
GLSL ES has no target assembler or entry point specification like DirectX 9 HLSL. Vertex and Fragment shaders only have one entry point called "main". When a shader is compiled, microcode is generated but can not be accessed by the application.

GLSL ES also does not provide assembler low level output after compiling. The GL ES Render system assumes that the Gpu program is a GL Gpu program so GLSLESProgramPipeline will create a GLSLESShader for the low level implementation. The GLES2Program class will create a shader and program object and compile the source but will not create a pipeline object. It's up to GLES2GpuProgram class to request a program pipeline object to link the program object to.

Note
GLSL ES supports multiple modular shader objects that can be attached to one program object to form a single shader. This is supported through the "attach" material script command. All the modules to be attached are listed on the same line as the attach command separated by white space.

Constructor & Destructor Documentation

◆ GLSLESProgramPipeline()

Ogre::GLSLESProgramPipeline::GLSLESProgramPipeline ( GLSLESShader vertexProgram,
GLSLESShader fragmentProgram 
)

Constructor should only be used by GLSLESProgramPipelineManager.

◆ ~GLSLESProgramPipeline()

virtual Ogre::GLSLESProgramPipeline::~GLSLESProgramPipeline ( )
virtual

Member Function Documentation

◆ activate()

void Ogre::GLSLESProgramPipeline::activate ( )
virtual

Makes a program pipeline object active by making sure it is linked and then putting it in use.

Implements Ogre::GLSLESProgramCommon.

◆ getAttributeIndex()

GLint Ogre::GLSLESProgramPipeline::getAttributeIndex ( VertexElementSemantic  semantic,
uint  index 
)
virtual

Get the index of a non-standard attribute bound in the linked code.

Reimplemented from Ogre::GLSLESProgramCommon.

◆ getGLProgramPipelineHandle()

GLuint Ogre::GLSLESProgramPipeline::getGLProgramPipelineHandle ( ) const
inline

GL Program Pipeline Handle.

◆ updatePassIterationUniforms()

void Ogre::GLSLESProgramPipeline::updatePassIterationUniforms ( GpuProgramParametersSharedPtr  params)
virtual

Updates program pipeline object uniforms using data from pass iteration GpuProgramParameters.

Normally called by GLSLESShader::bindMultiPassParameters() just before multi pass rendering occurs.

Implements Ogre::GLSLESProgramCommon.

◆ updateUniformBlocks()

void Ogre::GLSLESProgramPipeline::updateUniformBlocks ( GpuProgramParametersSharedPtr  params,
uint16  mask,
GpuProgramType  fromProgType 
)
virtual

Updates program object uniform blocks using shared parameter data from GpuProgramParameters.

Normally called by GLSLESShader::bindParameters() just before rendering occurs.

Implements Ogre::GLSLESProgramCommon.

◆ updateUniforms()

void Ogre::GLSLESProgramPipeline::updateUniforms ( GpuProgramParametersSharedPtr  params,
uint16  mask,
GpuProgramType  fromProgType 
)
virtual

Updates program pipeline object uniforms using named and indexed parameter data from GpuProgramParameters.

normally called by GLSLESShader::bindParameters() just before rendering occurs.

Implements Ogre::GLSLESProgramCommon.


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