GLGETACTIVEUNIFORMBL - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
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NAMEglGetActiveUniformBlockName − retrieve the name of an active uniform block

C SPECIFICATIONvoid glGetActiveUniformBlockName(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformBlockName);

PARAMETERSprogram Specifies the name of a program containing the uniform block​. uniformBlockIndex Specifies the index of the uniform block within program​. bufSize Specifies the size of the buffer addressed by uniformBlockName​. length Specifies the address of a variable to receive the number of characters that were written to uniformBlockName​. uniformBlockName Specifies the address an array of characters to receive the name of the uniform block at uniformBlockIndex​.

DESCRIPTIONglGetActiveUniformBlockName retrieves the name of the active uniform block at uniformBlockIndex within program​. program must be the name of a program object for which the command glLinkProgram() must have been called in the past, although it is not required that glLinkProgram() must have succeeded​. The link could have failed because the number of active uniforms exceeded the limit​. uniformBlockIndex is an active uniform block index of program, and must be less than the value of GL_ACTIVE_UNIFORM_BLOCKS​. Upon success, the name of the uniform block identified by unifomBlockIndex is returned into uniformBlockName​. The name is nul−terminated​. The actual number of characters written into uniformBlockName, excluding the nul terminator, is returned in length​. If length is NULL, no length is returned​. bufSize contains the maximum number of characters (including the nul terminator) that will be written into uniformBlockName​. If an error occurs, nothing will be written to uniformBlockName or length​.

ERRORSGL_INVALID_OPERATION is generated if program is not the name of a program object for which glLinkProgram() has been called in the past​. GL_INVALID_VALUE is generated if uniformBlockIndex is greater than or equal to the value of GL_ACTIVE_UNIFORM_BLOCKS or is not the index of an active uniform block in program​.

NOTESglGetActiveUniformBlockName is available only if the GL version is 3​.1 or greater​.

VERSION SUPPORT OpenGL Version Function / Feature Name 2​.0 none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'>none;'> 2​.1 3​.0 3​.1 3​.2 3​.3 4​.0 4​.1 4​.2 4​.3 4​.4 4​.5 glGetActiveUniformBlockName

SEE ALSOglGetActiveUniformBlock(), glGetUniformBlockIndex()

COPYRIGHTCopyright © 2010−2014 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/​.

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