GLGETACTIVEUNIFORMBL - Online Linux Manual PageSection : 3G
Updated : 01/20/2022
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Note : [FIXME: manual]
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()
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