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glGetProgramiv — Returns a parameter from a program object
void glGetProgramiv( | GLuint | program, |
| GLenum | pname, | |
| GLint * | params); |
programSpecifies the program object to be queried.
pnameSpecifies the object parameter. Accepted
symbolic names are
GL_DELETE_STATUS,
GL_LINK_STATUS,
GL_VALIDATE_STATUS,
GL_INFO_LOG_LENGTH,
GL_ATTACHED_SHADERS,
GL_ACTIVE_ATTRIBUTES,
GL_ACTIVE_ATTRIBUTE_MAX_LENGTH,
GL_ACTIVE_UNIFORMS,
GL_ACTIVE_UNIFORM_MAX_LENGTH.
paramsReturns the requested object parameter.
glGetProgram
returns in params
the value of a parameter for a specific program object. The following parameters are defined:
GL_DELETE_STATUS params returns
GL_TRUE if
program is currently flagged
for deletion, and GL_FALSE
otherwise.
GL_LINK_STATUS params returns
GL_TRUE if the last link
operation on program was
successful, and GL_FALSE
otherwise.
GL_VALIDATE_STATUS params returns
GL_TRUE or if the last
validation operation on
program was successful, and
GL_FALSE
otherwise.
GL_INFO_LOG_LENGTH params returns the
number of characters in the information log for
program including the null
termination character (i.e., the size of the
character buffer required to store the information
log). If program has no
information log, a value of 0 is
returned.
GL_ATTACHED_SHADERS params returns the
number of shader objects attached to
program.
GL_ACTIVE_ATTRIBUTES params returns the
number of active attribute variables for
program.
GL_ACTIVE_ATTRIBUTE_MAX_LENGTH params returns the
length of the longest active attribute name for
program, including the null
termination character (i.e., the size of the
character buffer required to store the longest
attribute name). If no active attributes exist, 0 is
returned.
GL_ACTIVE_UNIFORMS params returns the
number of active uniform variables for
program.
GL_ACTIVE_UNIFORM_MAX_LENGTH params returns the
length of the longest active uniform variable name
for program, including the
null termination character (i.e., the size of the
character buffer required to store the longest
uniform variable name). If no active uniform
variables exist, 0 is returned.
glGetProgram is available only if the
GL version is 2.0 or greater.
If an error is generated, no change is made to the
contents of params.
GL_INVALID_VALUE
is generated if program
is not a value generated by OpenGL.
GL_INVALID_OPERATION
is generated if program
does not refer to a program object.
GL_INVALID_ENUM
is generated if pname
is not an accepted value.
GL_INVALID_OPERATION is generated if
glGetProgram is executed between the
execution of
glBegin
and the corresponding execution of
glEnd.
glGetActiveAttrib
with argument program
glGetActiveUniform
with argument program
glGetAttachedShaders
with argument program
glGetProgramInfoLog
with argument program
glAttachShader, glCreateProgram, glDeleteProgram, glGetShader, glLinkProgram, glValidateProgram
Copyright © 2003-2005 3Dlabs Inc. Ltd. 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/.