path: root/libgamma_x_randr_crtc_initialise.c

/* See LICENSE file for copyright and license details. */
#define IN_LIBGAMMA_X_RANDR
#include "common.h"


/**
 * Initialise an allocated CRTC state
 * 
 * @param   this       The CRTC state to initialise
 * @param   partition  The partition state for the partition that the CRTC belongs to.
 * @param   crtc       The the index of the CRTC within the site
 * @return             Zero on success, otherwise (negative) the value of an
 *                     error identifier provided by this library
 */
int
libgamma_x_randr_crtc_initialise(struct libgamma_crtc_state *restrict this,
                                 struct libgamma_partition_state *restrict partition, size_t crtc)
{
	struct libgamma_x_randr_partition_data *restrict screen_data = partition->data;
	xcb_randr_crtc_t *restrict crtc_ids = screen_data->crtcs;
	this->data = crtc_ids + crtc;
	return crtc < partition->crtcs_available ? 0 : LIBGAMMA_NO_SUCH_CRTC;
}