glGetIntegerv

glGetIntegerv is a function in the OpenGL API used to query the current values of various implementation-dependent parameters. It retrieves integer values for a specified parameter name. The function takes two arguments: a parameter identifier and a pointer to an integer array where the retrieved values will be stored. The parameter identifier, such as GL_MAX_TEXTURE_SIZE or GL_VIEWPORT, specifies which parameter's value to query. The size of the integer array should be sufficient to hold the returned value(s). For parameters that return a single integer, a pointer to a single integer is sufficient. For parameters that return multiple integers, such as GL_VIEWPORT which returns four integers, a pointer to an array of at least four integers is required. This function is crucial for understanding the capabilities and current state of the OpenGL driver and hardware. Applications can use glGetIntegerv to adapt their behavior based on available resources or to verify configuration settings. For instance, checking GL_MAX_TEXTURE_SIZE can inform texture loading strategies, while querying GL_VIEWPORT ensures rendering occurs within the intended screen area.