text: #ifndef BACKEND_DRM_PROPERTIES_H
  #define BACKEND_DRM_PROPERTIES_H
  
  #include <stdbool.h>
  #include <stdint.h>
  
  /*
   * These types contain the property ids for several DRM objects.
   * See https://01.org/linuxgraphics/gfx-docs/drm/gpu/drm-kms.html#kms-properties
   * for more details.
   */
  
  union wlr_drm_connector_props {
  	struct {
  		uint32_t edid;
  		uint32_t dpms;
  		uint32_t link_status; // not guaranteed to exist
  		uint32_t path;
  		uint32_t vrr_capable; // not guaranteed to exist
  		uint32_t subconnector; // not guaranteed to exist
  		uint32_t bcast_rgb; // not guaranteed to exist
  
  		// atomic-modesetting only
  
  		uint32_t crtc_id;
  	};
  	uint32_t props[4];
  };
  
  union wlr_drm_crtc_props {
  	struct {
  		// Neither of these are guaranteed to exist
  		uint32_t vrr_enabled;
  		uint32_t gamma_lut;
  		uint32_t gamma_lut_size;
  
  		// atomic-modesetting only
  
  		uint32_t active;
  		uint32_t mode_id;
  	};
  	uint32_t props[6];
  };
  
  union wlr_drm_plane_props {
  	struct {
  		uint32_t type;
  		uint32_t rotation; // Not guaranteed to exist
  		uint32_t in_formats; // Not guaranteed to exist
  
  		// atomic-modesetting only
  
  		uint32_t src_x;
  		uint32_t src_y;
  		uint32_t src_w;
  		uint32_t src_h;
  		uint32_t crtc_x;
  		uint32_t crtc_y;
  		uint32_t crtc_w;
  		uint32_t crtc_h;
  		uint32_t fb_id;
  		uint32_t crtc_id;
  	};
  	uint32_t props[13];
  };
  
  bool get_drm_connector_props(int fd, uint32_t id,
  	union wlr_drm_connector_props *out);
  bool get_drm_crtc_props(int fd, uint32_t id, union wlr_drm_crtc_props *out);
  bool get_drm_plane_props(int fd, uint32_t id, union wlr_drm_plane_props *out);
  
  bool get_drm_prop(int fd, uint32_t obj, uint32_t prop, uint64_t *ret);
  void *get_drm_prop_blob(int fd, uint32_t obj, uint32_t prop, size_t *ret_len);
  char *get_drm_prop_enum(int fd, uint32_t obj, uint32_t prop);
  
  #endif
  