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