glGetActiveUniformName - query the name of an active uniform
GLsizei bufSize, GLsizei *length,
Specifies the program containing the active uniform index
Specifies the index of the active uniform whose name to
Specifies the size of the buffer, in units of GLchar, of
the buffer whose address is specified in uniformName.
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.
Specifies the address of a buffer into which the GL will
place the name of the active uniform at uniformIndex within
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
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 the value of GL_ACTIVE_UNIFORMS
minus one. The value of GL_ACTIVE_UNIFORMS can be queried with
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
GL_INVALID_VALUE is generated if program is not the
name of a program object for which glLinkProgram() has been
Copyright © 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/.
Copyright © 2010-2014 Khronos Group
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