glgetuniformindices(3g) [centos man page]

GLGETUNIFORMINDICES(3G) 					   OpenGL Manual					   GLGETUNIFORMINDICES(3G)

NAME

       glGetUniformIndices - retrieve the index of a named uniform block

C SPECIFICATION

       void glGetUniformIndices(GLuint program, GLsizei uniformCount, const GLchar **uniformNames, GLuint *uniformIndices);

PARAMETERS

       program
	   Specifies the name of a program containing uniforms whose indices to query.

       uniformCount
	   Specifies the number of uniforms whose indices to query.

       uniformNames
	   Specifies the address of an array of pointers to buffers containing the names of the queried uniforms.

       uniformIndices
	   Specifies the address of an array that will receive the indices of the uniforms.

DESCRIPTION

       glGetUniformIndices retrieves the indices of a number of uniforms 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.

       uniformCount indicates both the number of elements in the array of names uniformNames and the number of indices that may be written to
       uniformIndices.

       uniformNames contains a list of uniformCount name strings identifying the uniform names to be queried for indices. For each name string in
       uniformNames, the index assigned to the active uniform of that name will be written to the corresponding element of uniformIndices. If a
       string in uniformNames is not the name of an active uniform, the special value GL_INVALID_INDEX will be written to the corresponding
       element of uniformIndices.

       If an error occurs, nothing is written to uniformIndices.

ERRORS

       GL_INVALID_OPERATION is generated if program is not the name of a program object for which glLinkProgram() has been called in the past.

NOTES

       glGetUniformIndices is available only if the GL version is 3.1 or greater.

SEE ALSO

       glGetActiveUniform(), glGetActiveUniformName(), glLinkProgram()

COPYRIGHT

       Copyright (C) 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/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						   GLGETUNIFORMINDICES(3G)

GLGETACTIVEUNIFORMNA(3G)					   OpenGL Manual					  GLGETACTIVEUNIFORMNA(3G)

NAME

       glGetActiveUniformName - query the name of an active uniform

C SPECIFICATION

       void glGetActiveUniformName(GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei *length, GLchar *uniformName);

PARAMETERS

       program
	   Specifies the program containing the active uniform index uniformIndex.

       uniformIndex
	   Specifies the index of the active uniform whose name to query.

       bufSize
	   Specifies the size of the buffer, in units of GLchar, of the buffer whose address is specified in uniformName.

       length
	   Specifies the address of a variable that will receive the number of characters that were or would have been written to the buffer
	   addressed by uniformName.

       uniformName
	   Specifies the address of a buffer into which the GL will place the name of the active uniform at uniformIndex within program.

DESCRIPTION

       glGetActiveUniformName returns the name of the active uniform at uniformIndex within program. If uniformName is not NULL, up to bufSize
       characters (including a nul-terminator) will be written into the array whose address is specified by uniformName. If length is not NULL,
       the number of characters that were (or would have been) written into uniformName (not including the nul-terminator) will be placed in the
       variable whose address is specified in length. If length is NULL, no length is returned. The length of the longest uniform name in program
       is given by the value of GL_ACTIVE_UNIFORM_MAX_LENGTH, which can be queried with glGetProgram().

       If glGetActiveUniformName is not successful, nothing is written to length or uniformName.

       program must be the name of a program for which the command glLinkProgram() has been issued in the past. It is not necessary for program to
       have been linked successfully. The link could have failed because the number of active uniforms exceeded the limit.

       uniformIndex must be an active uniform index of the program program, in the range zero to GL_ACTIVE_UNIFORMS - 1. The value of
       GL_ACTIVE_UNIFORMS can be queried with glGetProgram().

ERRORS

       GL_INVALID_VALUE is generated if uniformIndex is greater than or equal to the value of GL_ACTIVE_UNIFORMS.

       GL_INVALID_VALUE is generated if bufSize is negative.

       GL_INVALID_VALUE is generated if program is not the name of a program object for which glLinkProgram() has been issued.

SEE ALSO

       glGetActiveUniform(), glGetUniformIndices(), glGetProgram(), glLinkProgram()

COPYRIGHT

       Copyright (C) 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/.

AUTHORS

       opengl.org

opengl.org							    06/10/2014						  GLGETACTIVEUNIFORMNA(3G)