glGetProgram : PyOpenGL 3.1.4 GL Man Pages

Returns a parameter from a program object

Signature

glGetProgramiv( GLuint ( program ) , GLenum ( pname ) , GLint *( params ) )-> void

glGetProgramiv( program , pname , params )

Parameters

Variables	Description
program	Specifies the program object to be queried.
pname	Specifies 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_ATOMIC_COUNTER_BUFFERS , GL_ACTIVE_ATTRIBUTES , GL_ACTIVE_ATTRIBUTE_MAX_LENGTH , GL_ACTIVE_UNIFORMS , GL_ACTIVE_UNIFORM_BLOCKS , GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH , GL_ACTIVE_UNIFORM_MAX_LENGTH , GL_COMPUTE_WORK_GROUP_SIZE GL_PROGRAM_BINARY_LENGTH , GL_TRANSFORM_FEEDBACK_BUFFER_MODE , GL_TRANSFORM_FEEDBACK_VARYINGS , GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH , GL_GEOMETRY_VERTICES_OUT , GL_GEOMETRY_INPUT_TYPE , and GL_GEOMETRY_OUTPUT_TYPE .
params	Returns the requested object parameter.

Description

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_ATOMIC_COUNTER_BUFFERS: params returns the number of active attribute atomic counter buffers used by 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.
GL_PROGRAM_BINARY_LENGTH: params returns the length of the program binary, in bytes that will be returned by a call to glGetProgramBinary . When a progam's GL_LINK_STATUS is GL_FALSE , its program binary length is zero.
GL_COMPUTE_WORK_GROUP_SIZE: params returns an array of three integers containing the local work group size of the compute program as specified by its input layout qualifier(s). program must be the name of a program object that has been previously linked successfully and contains a binary for the compute shader stage.
GL_TRANSFORM_FEEDBACK_BUFFER_MODE: params returns a symbolic constant indicating the buffer mode used when transform feedback is active. This may be GL_SEPARATE_ATTRIBS or GL_INTERLEAVED_ATTRIBS .
GL_TRANSFORM_FEEDBACK_VARYINGS: params returns the number of varying variables to capture in transform feedback mode for the program.
GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH: params returns the length of the longest variable name to be used for transform feedback, including the null-terminator.
GL_GEOMETRY_VERTICES_OUT: params returns the maximum number of vertices that the geometry shader in program will output.
GL_GEOMETRY_INPUT_TYPE: params returns a symbolic constant indicating the primitive type accepted as input to the geometry shader contained in program .
GL_GEOMETRY_OUTPUT_TYPE: params returns a symbolic constant indicating the primitive type that will be output by the geometry shader contained in program .

Notes

GL_ACTIVE_UNIFORM_BLOCKS and GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH are available only if the GL version 3.1 or greater.

GL_GEOMETRY_VERTICES_OUT , GL_GEOMETRY_INPUT_TYPE and GL_GEOMETRY_OUTPUT_TYPE are accepted only if the GL version is 3.2 or greater.

GL_COMPUTE_WORK_GROUP_SIZE is accepted only if the GL version is 4.3 or greater.

If an error is generated, no change is made to the contents of params .

Errors

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_OPERATION is generated if pname is GL_GEOMETRY_VERTICES_OUT , GL_GEOMETRY_INPUT_TYPE , or GL_GEOMETRY_OUTPUT_TYPE , and program does not contain a geometry shader.

GL_INVALID_ENUM is generated if pname is not an accepted value.

GL_INVALID_OPERATION is generated if pname is GL_COMPUTE_WORK_GROUP_SIZE and program does not contain a binary for the compute shader stage.

Associated Gets

glGetActiveAttrib with argument program

glGetActiveUniform with argument program

glGetAttachedShaders with argument program

glGetProgramInfoLog with argument program

glIsProgram

Version Support

glGetProgramiv

Copyright

2003-2005 3Dlabs Inc. Ltd. 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/

Sample Code References

The following code samples have been found which appear to reference the functions described here. Take care that the code may be old, broken or not even use PyOpenGL.

glGetProgramiv

OpenGLContext OpenGLContext/scenegraph/shaders.py Lines: 505, 513

Visvis core/shaders.py Lines: 539

{GPL3} OpenGL-Programmable 05-shader.py Lines: 90

{GPL3} OpenGL-Programmable 07-attrib.py Lines: 107

{GPL3} OpenGL-Programmable 09-gles2.py Lines: 121

{GPL3} OpenGL-Programmable 06-perpixel.py Lines: 98

{GPL3} OpenGL-Programmable 10-gl3.2core.py Lines: 129

{GPL3} OpenGL-Programmable 08-pbo.py Lines: 107

glGetProgram