#include "common/colorspaces_inline_conversions.h"
#include "common/colorspaces.h"
#include "common/matrices.h"
#include "develop/imageop.h"

Include dependency graph for iop_profile.h:

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Data Structures
struct	dt_iop_order_iccprofile_info_t

Typedefs
typedef struct dt_iop_order_iccprofile_info_t	dt_iop_order_iccprofile_info_t

Functions
void	dt_ioppr_init_profile_info (dt_iop_order_iccprofile_info_t *profile_info, const int lutsize)

void	dt_ioppr_cleanup_profile_info (dt_iop_order_iccprofile_info_t *profile_info)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_profile_info_from_list (struct dt_develop_t dev, dt_colorspaces_color_profile_type_t profile_type, const char profile_filename)

dt_iop_order_iccprofile_info_t *	dt_ioppr_add_profile_info_to_list (struct dt_develop_t dev, const dt_colorspaces_color_profile_type_t profile_type, const char profile_filename, const int intent)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_iop_work_profile_info (struct dt_iop_module_t module, GList iop_list)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_iop_input_profile_info (struct dt_iop_module_t module, GList iop_list)

dt_iop_order_iccprofile_info_t *	dt_ioppr_set_pipe_work_profile_info (struct dt_develop_t dev, struct dt_dev_pixelpipe_t pipe, const dt_colorspaces_color_profile_type_t type, const char *filename, const int intent)

dt_iop_order_iccprofile_info_t *	dt_ioppr_set_pipe_input_profile_info (struct dt_develop_t dev, struct dt_dev_pixelpipe_t pipe, const dt_colorspaces_color_profile_type_t type, const char *filename, const int intent, const dt_colormatrix_t matrix_in)

dt_iop_order_iccprofile_info_t *	dt_ioppr_set_pipe_output_profile_info (struct dt_develop_t dev, struct dt_dev_pixelpipe_t pipe, const dt_colorspaces_color_profile_type_t type, const char *filename, const int intent)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_histogram_profile_info (struct dt_develop_t *dev)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_pipe_work_profile_info (struct dt_dev_pixelpipe_t *pipe)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_pipe_input_profile_info (struct dt_dev_pixelpipe_t *pipe)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_pipe_output_profile_info (struct dt_dev_pixelpipe_t *pipe)

dt_iop_order_iccprofile_info_t *	dt_ioppr_get_pipe_current_profile_info (struct dt_iop_module_t module, struct dt_dev_pixelpipe_t pipe)

void	dt_ioppr_get_work_profile_type (struct dt_develop_t dev, dt_colorspaces_color_profile_type_t profile_type, const char **profile_filename)

void	dt_ioppr_get_input_profile_type (struct dt_develop_t dev, dt_colorspaces_color_profile_type_t profile_type, const char **profile_filename)

void	dt_ioppr_get_export_profile_type (struct dt_develop_t dev, dt_colorspaces_color_profile_type_t profile_type, const char **profile_filename)

void	dt_ioppr_transform_image_colorspace (struct dt_iop_module_t self, const float const image_in, float const image_out, const int width, const int height, const int cst_from, const int cst_to, int converted_cst, const dt_iop_order_iccprofile_info_t *const profile_info)

void	dt_ioppr_transform_image_colorspace_rgb (const float const image_in, float const image_out, const int width, const int height, const dt_iop_order_iccprofile_info_t const profile_info_from, const dt_iop_order_iccprofile_info_t const profile_info_to, const char *message)

static float	extrapolate_lut (const float *const lut, const float v, const int lutsize)

static float	eval_exp (const float coeff[3], const float x)

static void	_apply_trc (const dt_aligned_pixel_t rgb_in, dt_aligned_pixel_t rgb_out, float *const lut[3], const float unbounded_coeffs[3][3], const int lutsize)

static float	dt_ioppr_get_rgb_matrix_luminance (const dt_aligned_pixel_t rgb, const dt_colormatrix_t matrix_in, float *const lut_in[3], const float unbounded_coeffs_in[3][3], const int lutsize, const int nonlinearlut)

static void	dt_ioppr_rgb_matrix_to_xyz (const dt_aligned_pixel_t rgb, dt_aligned_pixel_t xyz, const dt_colormatrix_t matrix_in_transposed, float *const lut_in[3], const float unbounded_coeffs_in[3][3], const int lutsize, const int nonlinearlut)

static void	dt_ioppr_lab_to_rgb_matrix (const dt_aligned_pixel_t lab, dt_aligned_pixel_t rgb, const dt_colormatrix_t matrix_out_transposed, float *const lut_out[3], const float unbounded_coeffs_out[3][3], const int lutsize, const int nonlinearlut)

static void	dt_ioppr_rgb_matrix_to_lab (const dt_aligned_pixel_t rgb, dt_aligned_pixel_t lab, const dt_colormatrix_t matrix_in_transposed, float *const lut_in[3], const float unbounded_coeffs_in[3][3], const int lutsize, const int nonlinearlut)

static float	dt_ioppr_get_profile_info_middle_grey (const dt_iop_order_iccprofile_info_t *const profile_info)

static float	dt_ioppr_compensate_middle_grey (const float x, const dt_iop_order_iccprofile_info_t *const profile_info)

static float	dt_ioppr_uncompensate_middle_grey (const float x, const dt_iop_order_iccprofile_info_t *const profile_info)

Typedef Documentation

◆ dt_iop_order_iccprofile_info_t

typedef struct dt_iop_order_iccprofile_info_t dt_iop_order_iccprofile_info_t

Function Documentation

◆ _apply_trc()

static void _apply_trc	(	const dt_aligned_pixel_t	rgb_in,
		dt_aligned_pixel_t	rgb_out,
		float *const	lut[3],
		const float	unbounded_coeffs[3][3],
		const int	lutsize
	)

inlinestatic

References eval_exp(), and extrapolate_lut().

Referenced by dt_ioppr_get_rgb_matrix_luminance(), dt_ioppr_lab_to_rgb_matrix(), and dt_ioppr_rgb_matrix_to_xyz().

◆ dt_ioppr_add_profile_info_to_list()

dt_iop_order_iccprofile_info_t * dt_ioppr_add_profile_info_to_list	(	struct dt_develop_t *	dev,
		const dt_colorspaces_color_profile_type_t	profile_type,
		const char *	profile_filename,
		const int	intent
	)

adds the profile info from (profile_type, profile_filename) to the dev profiles info list if not already exists returns the generated profile or the existing one

References dt_develop_t::allprofile_info, dt_alloc_align, dt_free_align, dt_ioppr_generate_profile_info(), dt_ioppr_get_profile_info_from_list(), and dt_ioppr_init_profile_info().

Referenced by dt_ioppr_get_iop_work_profile_info(), dt_ioppr_set_pipe_input_profile_info(), dt_ioppr_set_pipe_output_profile_info(), dt_ioppr_set_pipe_work_profile_info(), process(), process(), and workicc_changed().

◆ dt_ioppr_cleanup_profile_info()

void dt_ioppr_cleanup_profile_info ( dt_iop_order_iccprofile_info_t * profile_info )

must be called when done with profile_info

References dt_free_align, dt_iop_order_iccprofile_info_t::lut_in, and dt_iop_order_iccprofile_info_t::lut_out.

Referenced by dt_dev_cleanup().

◆ dt_ioppr_compensate_middle_grey()

static float dt_ioppr_compensate_middle_grey	(	const float	x,
		const dt_iop_order_iccprofile_info_t *const	profile_info
	)

inlinestatic

References dt_ioppr_rgb_matrix_to_lab(), dt_iop_order_iccprofile_info_t::lut_in, dt_iop_order_iccprofile_info_t::lutsize, dt_iop_order_iccprofile_info_t::matrix_in_transposed, and dt_iop_order_iccprofile_info_t::nonlinearlut.

Referenced by _add_node_from_picker(), gui_changed(), and picker_scale().

◆ dt_ioppr_get_export_profile_type()

void dt_ioppr_get_export_profile_type	(	struct dt_develop_t *	dev,
		dt_colorspaces_color_profile_type_t *	profile_type,
		const char **	profile_filename
	)

returns the current setting of the export profile on colorout iop

References darktable, DT_COLORSPACE_NONE, darktable_t::iop, dt_develop_t::iop, dt_iop_module_so_t::op, and dt_iop_module_t::params.

◆ dt_ioppr_get_histogram_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_histogram_profile_info ( struct dt_develop_t * dev )

returns a reference to the histogram profile info histogram profile must not be cleanup()

◆ dt_ioppr_get_input_profile_type()

void dt_ioppr_get_input_profile_type	(	struct dt_develop_t *	dev,
		dt_colorspaces_color_profile_type_t *	profile_type,
		const char **	profile_filename
	)

returns the current setting of the input profile on colorin iop

◆ dt_ioppr_get_iop_input_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_iop_input_profile_info	(	struct dt_iop_module_t *	module,
		GList *	iop_list
	)

◆ dt_ioppr_get_iop_work_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_iop_work_profile_info	(	struct dt_iop_module_t *	module,
		GList *	iop_list
	)

returns a reference to the work profile info as set on colorin iop only if module is between colorin and colorout, otherwise returns NULL work profile must not be cleanup()

References DT_COLORSPACE_NONE, DT_INTENT_PERCEPTUAL, dt_ioppr_add_profile_info_to_list(), dt_ioppr_get_work_profile_type(), FALSE, dt_iop_module_t::op, TRUE, and type.

Referenced by _area_draw_callback(), _draw_color_picker(), _signal_profile_user_changed(), _update_gradient_slider_pickers(), apply_auto_black(), apply_auto_grey(), apply_auto_white_point_source(), apply_autotune(), blend_color_picker_apply(), dt_develop_blendif_init_masking_profile(), gui_changed(), process(), process(), process_fusion(), and process_lut().

◆ dt_ioppr_get_pipe_current_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_pipe_current_profile_info	(	struct dt_iop_module_t *	module,
		struct dt_dev_pixelpipe_t *	pipe
	)

Get the relevant RGB -> XYZ profile at the position of current module

References dt_iop_module_t::dev, dt_ioppr_get_iop_order(), dt_ioppr_get_pipe_input_profile_info(), dt_ioppr_get_pipe_output_profile_info(), dt_ioppr_get_pipe_work_profile_info(), and dt_develop_t::iop_order_list.

Referenced by _update_gradient_slider_pickers(), blend_color_picker_apply(), color_picker_apply(), commit_params(), dt_develop_blendif_init_masking_profile(), pipe_RGB_to_Ych(), pixelpipe_picker(), process(), and process().

◆ dt_ioppr_get_pipe_input_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_pipe_input_profile_info ( struct dt_dev_pixelpipe_t * pipe )

References dt_dev_pixelpipe_t::input_profile_info.

Referenced by _auto_set_exposure(), commit_params(), dt_ioppr_get_pipe_current_profile_info(), and process().

◆ dt_ioppr_get_pipe_output_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_pipe_output_profile_info ( struct dt_dev_pixelpipe_t * pipe )

References dt_dev_pixelpipe_t::output_profile_info.

Referenced by _area_draw_callback(), _draw_color_picker(), _update_RGB_colors(), dt_ioppr_get_pipe_current_profile_info(), gui_post_expose(), and process().

◆ dt_ioppr_get_pipe_work_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_pipe_work_profile_info ( struct dt_dev_pixelpipe_t * pipe )

returns the active work/input/output profile on the pipe

References dt_dev_pixelpipe_t::work_profile_info.

Referenced by _auto_set_illuminant(), _generate_curve_lut(), _retouch_blur(), _sample_color_picker(), collect_histogram_on_CPU(), color_picker_apply(), dt_develop_blendif_lab_blend(), dt_ioppr_get_pipe_current_profile_info(), histogram_collect(), pixelpipe_process_on_CPU(), process(), process(), process(), rt_adjust_levels(), and rt_process_stats().

◆ dt_ioppr_get_profile_info_from_list()

dt_iop_order_iccprofile_info_t * dt_ioppr_get_profile_info_from_list	(	struct dt_develop_t *	dev,
		dt_colorspaces_color_profile_type_t	profile_type,
		const char *	profile_filename
	)

returns the profile info from dev profiles info list that matches (profile_type, profile_filename) NULL if not found

References dt_develop_t::allprofile_info, dt_iop_order_iccprofile_info_t::filename, and dt_iop_order_iccprofile_info_t::type.

Referenced by dt_ioppr_add_profile_info_to_list().

◆ dt_ioppr_get_profile_info_middle_grey()

static float dt_ioppr_get_profile_info_middle_grey ( const dt_iop_order_iccprofile_info_t *const profile_info )

inlinestatic

References dt_iop_order_iccprofile_info_t::grey.

Referenced by _signal_profile_user_changed().

◆ dt_ioppr_get_rgb_matrix_luminance()

static float dt_ioppr_get_rgb_matrix_luminance	(	const dt_aligned_pixel_t	rgb,
		const dt_colormatrix_t	matrix_in,
		float *const	lut_in[3],
		const float	unbounded_coeffs_in[3][3],
		const int	lutsize,
		const int	nonlinearlut
	)

inlinestatic

References _apply_trc().

Referenced by _add_node_from_picker(), _blendif_cook(), _blendif_gray(), _blendif_gray(), _blendif_scale(), _rgb_luminance(), _rgb_luminance(), color_picker_apply(), dt_ioppr_generate_profile_info(), dt_rgb_norm(), filmic_chroma_v1(), filmic_split_v1(), filmic_split_v2_v3(), get_pixel_norm(), picker_scale(), and process().

◆ dt_ioppr_get_work_profile_type()

void dt_ioppr_get_work_profile_type	(	struct dt_develop_t *	dev,
		dt_colorspaces_color_profile_type_t *	profile_type,
		const char **	profile_filename
	)

returns the current setting of the work profile on colorin iop

References darktable, DT_COLORSPACE_NONE, darktable_t::iop, dt_develop_t::iop, dt_iop_module_so_t::op, and dt_iop_module_t::params.

Referenced by dt_ioppr_get_iop_work_profile_info().

◆ dt_ioppr_init_profile_info()

void dt_ioppr_init_profile_info	(	dt_iop_order_iccprofile_info_t *	profile_info,
		const int	lutsize
	)

must be called before using profile_info, default lutsize = 0

References _mark_as_nonmatrix_profile(), dt_alloc_align_float(), DT_COLORSPACE_NONE, DT_INTENT_PERCEPTUAL, DT_IOPPR_LUT_SAMPLES, dt_iop_order_iccprofile_info_t::filename, dt_iop_order_iccprofile_info_t::grey, dt_iop_order_iccprofile_info_t::intent, dt_iop_order_iccprofile_info_t::lut_in, dt_iop_order_iccprofile_info_t::lut_out, dt_iop_order_iccprofile_info_t::lutsize, dt_iop_order_iccprofile_info_t::nonlinearlut, and dt_iop_order_iccprofile_info_t::type.

Referenced by dt_ioppr_add_profile_info_to_list().

◆ dt_ioppr_lab_to_rgb_matrix()

static void dt_ioppr_lab_to_rgb_matrix	(	const dt_aligned_pixel_t	lab,
		dt_aligned_pixel_t	rgb,
		const dt_colormatrix_t	matrix_out_transposed,
		float *const	lut_out[3],
		const float	unbounded_coeffs_out[3][3],
		const int	lutsize,
		const int	nonlinearlut
	)

inlinestatic

References _apply_trc(), dt_apply_transposed_color_matrix(), and dt_Lab_to_XYZ().

Referenced by dt_ioppr_uncompensate_middle_grey(), gui_post_expose(), and rt_adjust_levels().

◆ dt_ioppr_rgb_matrix_to_lab()

static void dt_ioppr_rgb_matrix_to_lab	(	const dt_aligned_pixel_t	rgb,
		dt_aligned_pixel_t	lab,
		const dt_colormatrix_t	matrix_in_transposed,
		float *const	lut_in[3],
		const float	unbounded_coeffs_in[3][3],
		const int	lutsize,
		const int	nonlinearlut
	)

inlinestatic

References dt_ioppr_rgb_matrix_to_xyz(), and dt_XYZ_to_Lab().

Referenced by dt_develop_blendif_lab_blend(), dt_ioppr_compensate_middle_grey(), rt_adjust_levels(), and rt_process_stats().

◆ dt_ioppr_rgb_matrix_to_xyz()

static void dt_ioppr_rgb_matrix_to_xyz	(	const dt_aligned_pixel_t	rgb,
		dt_aligned_pixel_t	xyz,
		const dt_colormatrix_t	matrix_in_transposed,
		float *const	lut_in[3],
		const float	unbounded_coeffs_in[3][3],
		const int	lutsize,
		const int	nonlinearlut
	)

inlinestatic

References _apply_trc(), and dt_apply_transposed_color_matrix().

Referenced by _blendif_jzczhz(), _convert_GUI_colors(), _process_vectorscope(), _rgb_to_JzCzhz(), _scope_pixel_to_display_rgb(), _scope_pixel_to_xyz(), dt_ioppr_rgb_matrix_to_lab(), pipe_RGB_to_Ych(), and rgb_to_JzCzhz().

◆ dt_ioppr_set_pipe_input_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_set_pipe_input_profile_info	(	struct dt_develop_t *	dev,
		struct dt_dev_pixelpipe_t *	pipe,
		const dt_colorspaces_color_profile_type_t	type,
		const char *	filename,
		const int	intent,
		const dt_colormatrix_t	matrix_in
	)

References DT_COLORSPACE_ALTERNATE_MATRIX, DT_COLORSPACE_EMBEDDED_ICC, DT_COLORSPACE_LIN_REC2020, dt_ioppr_add_profile_info_to_list(), dt_dev_pixelpipe_t::input_profile_info, mat3SSEinv(), dt_iop_order_iccprofile_info_t::matrix_in, dt_iop_order_iccprofile_info_t::matrix_in_transposed, dt_iop_order_iccprofile_info_t::matrix_out, dt_iop_order_iccprofile_info_t::matrix_out_transposed, transpose_3xSSE(), dt_iop_order_iccprofile_info_t::type, and type.

Referenced by commit_params().

◆ dt_ioppr_set_pipe_output_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_set_pipe_output_profile_info	(	struct dt_develop_t *	dev,
		struct dt_dev_pixelpipe_t *	pipe,
		const dt_colorspaces_color_profile_type_t	type,
		const char *	filename,
		const int	intent
	)

References DT_COLORSPACE_DISPLAY, DT_COLORSPACE_SRGB, dt_ioppr_add_profile_info_to_list(), dt_iop_order_iccprofile_info_t::matrix_in, dt_iop_order_iccprofile_info_t::matrix_out, dt_dev_pixelpipe_t::output_profile_info, and type.

Referenced by commit_params().

◆ dt_ioppr_set_pipe_work_profile_info()

dt_iop_order_iccprofile_info_t * dt_ioppr_set_pipe_work_profile_info	(	struct dt_develop_t *	dev,
		struct dt_dev_pixelpipe_t *	pipe,
		const dt_colorspaces_color_profile_type_t	type,
		const char *	filename,
		const int	intent
	)

set the work profile (type, filename) on the pipe, should be called on process*() if matrix cannot be generated it default to linear rec 2020 returns the actual profile that has been set

References DT_COLORSPACE_LIN_REC2020, dt_ioppr_add_profile_info_to_list(), dt_iop_order_iccprofile_info_t::matrix_in, dt_iop_order_iccprofile_info_t::matrix_out, type, and dt_dev_pixelpipe_t::work_profile_info.

Referenced by commit_params().

◆ dt_ioppr_transform_image_colorspace()

void dt_ioppr_transform_image_colorspace	(	struct dt_iop_module_t *	self,
		const float *const	image_in,
		float *const	image_out,
		const int	width,
		const int	height,
		const int	cst_from,
		const int	cst_to,
		int *	converted_cst,
		const dt_iop_order_iccprofile_info_t *const	profile_info
	)

transforms image from cst_from to cst_to colorspace using profile_info

References _transform_lcms2(), _transform_matrix(), dt_times_t::clock, darktable, DT_COLORSPACE_NONE, DT_DEBUG_PERF, dt_get_times(), height, IOP_CS_RGB, dt_iop_order_iccprofile_info_t::matrix_in, dt_iop_order_iccprofile_info_t::matrix_out, dt_iop_module_t::multi_name, dt_iop_module_t::op, dt_iop_order_iccprofile_info_t::type, darktable_t::unmuted, dt_times_t::user, and width.

Referenced by _draw_color_picker(), _retouch_blur(), _sample_color_picker(), collect_histogram_on_CPU(), and pixelpipe_process_on_CPU().

◆ dt_ioppr_transform_image_colorspace_rgb()

void dt_ioppr_transform_image_colorspace_rgb	(	const float *const	image_in,
		float *const	image_out,
		const int	width,
		const int	height,
		const dt_iop_order_iccprofile_info_t *const	profile_info_from,
		const dt_iop_order_iccprofile_info_t *const	profile_info_to,
		const char *	message
	)

◆ dt_ioppr_uncompensate_middle_grey()

static float dt_ioppr_uncompensate_middle_grey	(	const float	x,
		const dt_iop_order_iccprofile_info_t *const	profile_info
	)

inlinestatic

References dt_ioppr_lab_to_rgb_matrix(), dt_iop_order_iccprofile_info_t::lut_out, dt_iop_order_iccprofile_info_t::lutsize, dt_iop_order_iccprofile_info_t::matrix_out_transposed, and dt_iop_order_iccprofile_info_t::nonlinearlut.

Referenced by _generate_curve_lut(), and gui_changed().

◆ eval_exp()

static float eval_exp	(	const float	coeff[3],
		const float	x
	)

inlinestatic

Referenced by _apply_tonecurves(), _apply_trc(), and _transform_matrix_rgb().

◆ extrapolate_lut()

static float extrapolate_lut	(	const float *const	lut,
		const float	v,
		const int	lutsize
	)

inlinestatic

the following must have the matrix_in and matrix_out generated

Todo:: : check if optimization is worthwhile!

References CLAMPS, and f().

Referenced by _apply_tonecurves(), _apply_trc(), _init_unbounded_coeffs(), and _transform_matrix_rgb().

Data Structures

Typedefs

Functions

Typedef Documentation

◆ dt_iop_order_iccprofile_info_t

Function Documentation

◆ _apply_trc()

◆ dt_ioppr_add_profile_info_to_list()

◆ dt_ioppr_cleanup_profile_info()

◆ dt_ioppr_compensate_middle_grey()

◆ dt_ioppr_get_export_profile_type()

◆ dt_ioppr_get_histogram_profile_info()

◆ dt_ioppr_get_input_profile_type()

◆ dt_ioppr_get_iop_input_profile_info()

◆ dt_ioppr_get_iop_work_profile_info()

◆ dt_ioppr_get_pipe_current_profile_info()

◆ dt_ioppr_get_pipe_input_profile_info()

◆ dt_ioppr_get_pipe_output_profile_info()

◆ dt_ioppr_get_pipe_work_profile_info()

◆ dt_ioppr_get_profile_info_from_list()

◆ dt_ioppr_get_profile_info_middle_grey()

◆ dt_ioppr_get_rgb_matrix_luminance()

◆ dt_ioppr_get_work_profile_type()

◆ dt_ioppr_init_profile_info()

◆ dt_ioppr_lab_to_rgb_matrix()

◆ dt_ioppr_rgb_matrix_to_lab()

◆ dt_ioppr_rgb_matrix_to_xyz()

◆ dt_ioppr_set_pipe_input_profile_info()

◆ dt_ioppr_set_pipe_output_profile_info()

◆ dt_ioppr_set_pipe_work_profile_info()

◆ dt_ioppr_transform_image_colorspace()

◆ dt_ioppr_transform_image_colorspace_rgb()

◆ dt_ioppr_uncompensate_middle_grey()

◆ eval_exp()

◆ extrapolate_lut()