GLGETACTIVEUNIFORMNA(3G) OpenGL Manual GLGETACTIVEUNIFORMNA(3G)
glGetActiveUniformName - query the name of an active uniform
void glGetActiveUniformName(GLuint program, GLuint uniformIndex, GLsizei bufSize,
GLsizei *length, GLchar *uniformName);
Specifies the program containing the active uniform index uniformIndex.
Specifies the index of the active uniform whose name to query.
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 program.
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
GL_INVALID_VALUE is generated if uniformIndex is greater than or equal to the value of
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.
glGetActiveUniform(), glGetUniformIndices(), glGetProgram(), glLinkProgram()
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.
opengl.org 06/10/2014 GLGETACTIVEUNIFORMNA(3G)