glGetProgramiv

glGetProgramiv is a function in the OpenGL API used to query integer-valued parameters of a program object. A program object is a collection of shader objects that have been successfully compiled and linked. This function allows developers to retrieve information about the linked program, such as its active uniform variables, active attributes, or whether it has been successfully linked.

The function takes two arguments: the program object name and a parameter token. The parameter token specifies which property of the program object to query. For example, GL_LINK_STATUS can be used to check if the program was linked successfully. The result of the query is returned in a variable provided by the caller. This function is essential for debugging and introspection of OpenGL programs, enabling developers to verify the state and contents of their shaders and ensure correct rendering. It is a fundamental tool for understanding the results of program compilation and linking processes.