vkms_composer.h

 1/* SPDX-License-Identifier: GPL-2.0+ */
 2
 3#ifndef _VKMS_COMPOSER_H_
 4#define _VKMS_COMPOSER_H_
 5
 6#include <kunit/visibility.h>
 7#include "vkms_drv.h"
 8
 9/*
10 * This enum is related to the positions of the variables inside
11 * `struct drm_color_lut`, so the order of both needs to be the same.
12 */
13enum lut_channel {
14	LUT_RED = 0,
15	LUT_GREEN,
16	LUT_BLUE,
17	LUT_RESERVED
18};
19
20#if IS_ENABLED(CONFIG_KUNIT)
21u16 lerp_u16(u16 a, u16 b, s64 t);
22s64 get_lut_index(const struct vkms_color_lut *lut, u16 channel_value);
23u16 apply_lut_to_channel_value(const struct vkms_color_lut *lut, u16 channel_value,
24			       enum lut_channel channel);
25void apply_3x4_matrix(struct pixel_argb_s32 *pixel, const struct drm_color_ctm_3x4 *matrix);
26#endif
27
28#endif /* _VKMS_COMPOSER_H_ */