glGetProgramiv - Returns a parameter from a program object

glGetActiveAttrib() with argument programglGetActiveUniform() with argument programglGetAttachedShaders() with argument programglGetProgramInfoLog() with argument programglIsProgram()

voidglGetProgramiv(GLuintprogram,GLenumpname,GLint*params);

       Copyright © 2003-2005 3Dlabs Inc. Ltd.
       Copyright © 2010-2014 Khronos Group

[FIXME: source]                                    11/18/2024                                   GLGETPROGRAM(3G)

glGetProgram returns in params the value of a parameter for a specific program object. The following
       parameters are defined:

       GL_DELETE_STATUSparams returns GL_TRUE if program is currently flagged for deletion, and GL_FALSE otherwise.

       GL_LINK_STATUSparams returns GL_TRUE if the last link operation on program was successful, and GL_FALSE otherwise.

       GL_VALIDATE_STATUSparams returns GL_TRUE or if the last validation operation on program was successful, and GL_FALSE
           otherwise.

       GL_INFO_LOG_LENGTHparams 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_SHADERSparams returns the number of shader objects attached to program.

       GL_ACTIVE_ATOMIC_COUNTER_BUFFERSparams returns the number of active attribute atomic counter buffers used by program.

       GL_ACTIVE_ATTRIBUTESparams returns the number of active attribute variables for program.

       GL_ACTIVE_ATTRIBUTE_MAX_LENGTHparams 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_UNIFORMSparams returns the number of active uniform variables for program.

       GL_ACTIVE_UNIFORM_MAX_LENGTHparams 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_LENGTHparams 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_SIZEparams 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_MODEparams 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_VARYINGSparams returns the number of varying variables to capture in transform feedback mode for the program.

       GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTHparams returns the length of the longest variable name to be used for transform feedback, including
           the null-terminator.

       GL_GEOMETRY_VERTICES_OUTparams returns the maximum number of vertices that the geometry shader in program will output.

       GL_GEOMETRY_INPUT_TYPEparams returns a symbolic constant indicating the primitive type accepted as input to the geometry
           shader contained in program.

       GL_GEOMETRY_OUTPUT_TYPEparams returns a symbolic constant indicating the primitive type that will be output by the geometry
           shader contained in program.

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.

       glGetProgramiv - Returns a parameter from a program object

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.

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_SIZEGL_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.

glAttachShader(), glCreateProgram(), glDeleteProgram(), glGetShader(), glLinkProgram(),
       glValidateProgram()

       ┌────────────────┬───────────────────────────────────────────────────────────────────────┐
       │                │                OpenGLVersion                                         │
       ├────────────────┼─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┤
       │ Function       │ 2.0 │ 2.1 │ 3.0 │ 3.1 │ 3.2 │ 3.3 │ 4.0 │ 4.1 │ 4.2 │ 4.3 │ 4.4 │ 4.5 │
       │ /              │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Feature        │     │     │     │     │     │     │     │     │     │     │     │     │
       │ Name           │     │     │     │     │     │     │     │     │     │     │     │     │
       ├────────────────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┼─────┤
       │ glGetProgramiv │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │  ✔  │
       └────────────────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┴─────┘