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#ifndef LIBBACKLIGHT_H
#define LIBBACKLIGHT_H
#include <libudev.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
enum backlight_type {
BACKLIGHT_RAW,
BACKLIGHT_PLATFORM,
BACKLIGHT_FIRMWARE
};
struct backlight {
char *path;
int max_brightness;
int brightness;
enum backlight_type type;
};
/*
* Find and set up a backlight for a valid udev connector device, i.e. one
* matching drm subsytem and with status of connected.
*/
struct backlight *backlight_init(struct udev_device *drm_device,
uint32_t connector_type);
/* Free backlight resources */
void backlight_destroy(struct backlight *backlight);
/* Provide the maximum backlight value */
long backlight_get_max_brightness(struct backlight *backlight);
/* Provide the cached backlight value */
long backlight_get_brightness(struct backlight *backlight);
/* Provide the hardware backlight value */
long backlight_get_actual_brightness(struct backlight *backlight);
/* Set the backlight to a value between 0 and max */
long backlight_set_brightness(struct backlight *backlight, long brightness);
#ifdef __cplusplus
}
#endif
#endif /* LIBBACKLIGHT_H */
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