glGetProgram 3G glGetProgramiv Returns a parameter from a program object void glGetProgramiv GLuint program GLenum pname GLint *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_ATTRIBUTES, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, GL_ACTIVE_UNIFORMS, GL_ACTIVE_UNIFORM_MAX_LENGTH. params Returns 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 glIsProgram 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/.