OGRE
13.6
Object-Oriented Graphics Rendering Engine
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Specialisation of GLSLProgram to provide support for separable programs via the OpenGL program pipeline. More...
#include <OgreGLSLSeparableProgram.h>
Public Member Functions | |
GLSLSeparableProgram (const GLShaderList &shaders) | |
Constructor should only be used by GLSLSeparableProgramManager. More... | |
~GLSLSeparableProgram () | |
void | activate (void) override |
Makes a program pipeline object active by making sure it is linked and then putting it in use. More... | |
void | updateUniforms (GpuProgramParametersSharedPtr params, uint16 mask, GpuProgramType fromProgType) override |
Updates program pipeline object uniforms using named and indexed parameter data from GpuProgramParameters. More... | |
Public Member Functions inherited from Ogre::GLSLProgram | |
void | setTransformFeedbackVaryings (const std::vector< String > &nameStrings) |
Public Member Functions inherited from Ogre::GLSLProgramCommon | |
GLSLProgramCommon (const GLShaderList &shaders) | |
virtual | ~GLSLProgramCommon () |
uint | getGLProgramHandle (void) const |
Get the GL Handle for the program object. More... | |
bool | isUsingShader (GLSLShaderCommon *shader) const |
query if the program is using the given shader More... | |
Additional Inherited Members | |
Static Public Member Functions inherited from Ogre::GLSLProgram | |
static void | bindFixedAttributes (GLuint program) |
static bool | getMicrocodeFromCache (uint32 id, GLuint programHandle) |
Get the the binary data of a program from the microcode cache. More... | |
static void | writeMicrocodeToCache (uint32 id, GLuint programHandle) |
add the microcode to the cache More... | |
Static Public Member Functions inherited from Ogre::GLSLProgramCommon | |
static int32 | getFixedAttributeIndex (VertexElementSemantic semantic, uint index) |
Get the fixed attribute bindings normally used by GL for a semantic. More... | |
static void | useTightAttributeLayout () |
use alternate vertex attribute layout using only 8 vertex attributes More... | |
Specialisation of GLSLProgram to provide support for separable programs via the OpenGL program pipeline.
Separable programs consist of shader objects which have been individually linked. This allows for invidual 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.
GLSL also does not provide assembler low level output after compiling. The GL Render system assumes that the Gpu program is a GL Gpu program so GLSLSeparableProgram will create a GL3PlusShader for the low level implementation. The GLProgram class will create a shader and program object and compile the source but will not create a pipeline object. It's up to GLGpuProgram class to request a program pipeline object to link the program object to.
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explicit |
Constructor should only be used by GLSLSeparableProgramManager.
Ogre::GLSLSeparableProgram::~GLSLSeparableProgram | ( | ) |
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overridevirtual |
Updates program pipeline object uniforms using named and indexed parameter data from GpuProgramParameters.
normally called by GLSLShader::bindProgramParameters() just before rendering occurs.
Implements Ogre::GLSLProgramCommon.
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overridevirtual |
Makes a program pipeline object active by making sure it is linked and then putting it in use.
Implements Ogre::GLSLProgramCommon.