GLAPI/glUniformBlockBinding: Difference between revisions
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== Function Definition == | == Function Definition == | ||
void '''glUniformBlockBinding'''(GLuint | void '''glUniformBlockBinding'''(GLuint {{param|program}}, GLuint {{param|uniformBlockIndex}}, GLuint {{param|uniformBlockBinding}}); | ||
; program | ; program | ||
: The name of a program object containing the active uniform block whose binding to assign. | : The name of a program object containing the active uniform block whose binding to assign. | ||
; uniformBlockIndex | ; uniformBlockIndex | ||
: The index of the active uniform block within | : The index of the active uniform block within {{param|program}} whose binding to assign. | ||
; uniformBlockBinding | ; uniformBlockBinding | ||
: Specifies the binding point to which to bind the uniform block with index | : Specifies the binding point to which to bind the uniform block with index {{param|uniformBlockIndex}} within {{param|program}}. | ||
== Description == | == Description == | ||
Binding points for active uniform blocks are assigned using '''glUniformBlockBinding'''. Each of a program's active uniform blocks has a corresponding uniform buffer binding point. | Binding points for active uniform blocks are assigned using '''glUniformBlockBinding'''. Each of a program's active uniform blocks has a corresponding uniform buffer binding point. {{param|program}} is the name of a program object for which the command {{apifunc|glLinkProgram}} has been issued in the past. | ||
If successful, '''glUniformBlockBinding''' specifies that | If successful, '''glUniformBlockBinding''' specifies that {{param|program}} will use the data store of the buffer object bound to the binding point {{param|uniformBlockBinding}} to extract the values of the uniforms in the uniform block identified by {{param|uniformBlockIndex}}. | ||
When a program object is linked or re-linked, the uniform buffer object binding point assigned to each of its active uniform blocks is reset to zero. | When a program object is linked or re-linked, the uniform buffer object binding point assigned to each of its active uniform blocks is reset to zero. | ||
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== Errors == | == Errors == | ||
{{ | {{enum|GL_INVALID_VALUE}} is generated if {{param|uniformBlockIndex}} is not an active uniform block index of {{param|program}}. | ||
{{ | {{enum|GL_INVALID_VALUE}} is generated if {{param|uniformBlockBinding}} is greater than or equal to the value of {{enum|GL_MAX_UNIFORM_BUFFER_BINDINGS}}. | ||
{{ | {{enum|GL_INVALID_VALUE}} is generated {{param|program}} is not the name of a program object generated by the GL. | ||
== Notes == | == Notes == | ||
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== Associated Gets == | == Associated Gets == | ||
{{apifunc|glGetUniformBlockIndex}} with the program and the name of the block. | |||
{{apifunc|glGetProgramResourceIndex}} with the program, {{enum|GL_UNIFORM_BLOCK}}, and the name of the block. | |||
{{apifunc|glGetActiveUniformBlock}} with argument {{enum|GL_UNIFORM_BLOCK_BINDING}} | |||
{{apifunc|glGetProgramResource}} with {{enum|GL_UNIFORM_BLOCK}} and {{enum|GL_BUFFER_BINDING}} | |||
== See Also == | == See Also == | ||
{{apifunc|glLinkProgram}}, {{apifunc|glBindBufferBase}}, {{apifunc|glBindBufferRange}} | |||
== Copyright == | == Copyright == | ||
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Copyright © 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. [http://opencontent.org/openpub/ http://opencontent.org/openpub/]. | Copyright © 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. [http://opencontent.org/openpub/ http://opencontent.org/openpub/]. | ||
[[Category:API Reference | [[Category:Core API Ref Shader Program Usage and State|UniformBlockBinding]] | ||
[[Category:Core API Reference|UniformBlockBinding]] | |||
[[Category:Program Object API State Functions|UniformBlockBinding]] | |||
Latest revision as of 10:05, 15 August 2013
| Core in version | 4.6 | |
|---|---|---|
| Core since version | 3.1 | |
glUniformBlockBinding: assign a binding point to an active uniform block
Function Definition
void glUniformBlockBinding(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
- program
- The name of a program object containing the active uniform block whose binding to assign.
- uniformBlockIndex
- The index of the active uniform block within program whose binding to assign.
- uniformBlockBinding
- Specifies the binding point to which to bind the uniform block with index uniformBlockIndex within program.
Description
Binding points for active uniform blocks are assigned using glUniformBlockBinding. Each of a program's active uniform blocks has a corresponding uniform buffer binding point. program is the name of a program object for which the command glLinkProgram has been issued in the past.
If successful, glUniformBlockBinding specifies that program will use the data store of the buffer object bound to the binding point uniformBlockBinding to extract the values of the uniforms in the uniform block identified by uniformBlockIndex.
When a program object is linked or re-linked, the uniform buffer object binding point assigned to each of its active uniform blocks is reset to zero.
Errors
GL_INVALID_VALUE is generated if uniformBlockIndex is not an active uniform block index of program.
GL_INVALID_VALUE is generated if uniformBlockBinding is greater than or equal to the value of GL_MAX_UNIFORM_BUFFER_BINDINGS.
GL_INVALID_VALUE is generated program is not the name of a program object generated by the GL.
Notes
glUniformBlockBinding is available only if the GL version is 3.1 or greater.
Associated Gets
glGetUniformBlockIndex with the program and the name of the block.
glGetProgramResourceIndex with the program, GL_UNIFORM_BLOCK, and the name of the block.
glGetActiveUniformBlock with argument GL_UNIFORM_BLOCK_BINDING
glGetProgramResource with GL_UNIFORM_BLOCK and GL_BUFFER_BINDING
See Also
glLinkProgram, glBindBufferBase, glBindBufferRange
Copyright
Copyright © 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.