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/*
This file is part of darktable,
copyright (c) 2019 edgardo hoszowski.
darktable is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
darktable is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with darktable. If not, see <http://www.gnu.org/licenses/>.
*/
#include "color_conversion.h"
#include "colorspace.h"
kernel void
colorspaces_transform_lab_to_rgb_matrix(read_only image2d_t in, write_only image2d_t out, const int width, const int height,
constant const dt_colorspaces_iccprofile_info_cl_t *const profile_info, read_only image2d_t lut)
{
const int x = get_global_id(0);
const int y = get_global_id(1);
if(x >= width || y >= height) return;
float4 pixel = read_imagef(in, sampleri, (int2)(x, y));
pixel.xyz = Lab_to_XYZ(pixel).xyz;
pixel = matrix_product(pixel, profile_info->matrix_out);
if(profile_info->nonlinearlut)
pixel = apply_trc_out(pixel, profile_info, lut);
write_imagef(out, (int2)(x, y), pixel);
}
kernel void
colorspaces_transform_rgb_matrix_to_lab(read_only image2d_t in, write_only image2d_t out, const int width, const int height,
constant const dt_colorspaces_iccprofile_info_cl_t *const profile_info, read_only image2d_t lut)
{
const int x = get_global_id(0);
const int y = get_global_id(1);
if(x >= width || y >= height) return;
float4 pixel = read_imagef(in, sampleri, (int2)(x, y));
if(profile_info->nonlinearlut)
pixel = apply_trc_in(pixel, profile_info, lut);
pixel = matrix_product(pixel, profile_info->matrix_in);
pixel.xyz = XYZ_to_Lab(pixel).xyz;
write_imagef(out, (int2)(x, y), pixel);
}
kernel void
colorspaces_transform_rgb_matrix_to_rgb(read_only image2d_t in, write_only image2d_t out, const int width, const int height,
constant const dt_colorspaces_iccprofile_info_cl_t *const profile_info_from, read_only image2d_t lut_from,
constant const dt_colorspaces_iccprofile_info_cl_t *const profile_info_to, read_only image2d_t lut_to,
constant const float *const matrix)
{
const int x = get_global_id(0);
const int y = get_global_id(1);
if(x >= width || y >= height) return;
float4 pixel = read_imagef(in, sampleri, (int2)(x, y));
if(profile_info_from->nonlinearlut)
pixel = apply_trc_in(pixel, profile_info_from, lut_from);
pixel = matrix_product(pixel, matrix);
if(profile_info_to->nonlinearlut)
pixel = apply_trc_out(pixel, profile_info_to, lut_to);
write_imagef(out, (int2)(x, y), pixel);
}
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