You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
157 lines
4.5 KiB
157 lines
4.5 KiB
/*
|
|
* Copyright 2021 Collabora, Ltd.
|
|
* Copyright 2021 Advanced Micro Devices, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the
|
|
* next paragraph) shall be included in all copies or substantial
|
|
* portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <assert.h>
|
|
#include <libweston/libweston.h>
|
|
|
|
#include "color.h"
|
|
#include "color-lcms.h"
|
|
#include "shared/helpers.h"
|
|
|
|
/* Arguments to cmsBuildParametricToneCurve() */
|
|
struct tone_curve_def {
|
|
cmsInt32Number cmstype;
|
|
cmsFloat64Number params[5];
|
|
};
|
|
|
|
/*
|
|
* LCMS uses the required number of 'params' based on 'cmstype', the parametric
|
|
* tone curve number. LCMS honors negative 'cmstype' as inverse function.
|
|
* These are LCMS built-in parametric tone curves.
|
|
*/
|
|
static const struct tone_curve_def predefined_eotf_curves[] = {
|
|
[CMLCMS_TYPE_EOTF_sRGB] = {
|
|
.cmstype = 4,
|
|
.params = { 2.4, 1. / 1.055, 0.055 / 1.055, 1. / 12.92, 0.04045 },
|
|
},
|
|
[CMLCMS_TYPE_EOTF_sRGB_INV] = {
|
|
.cmstype = -4,
|
|
.params = { 2.4, 1. / 1.055, 0.055 / 1.055, 1. / 12.92, 0.04045 },
|
|
},
|
|
};
|
|
|
|
static void
|
|
cmlcms_fill_in_tone_curve(struct weston_color_transform *xform_base,
|
|
float *values, unsigned len)
|
|
{
|
|
struct cmlcms_color_transform *xform = get_xform(xform_base);
|
|
float *R_lut = values;
|
|
float *G_lut = R_lut + len;
|
|
float *B_lut = G_lut + len;
|
|
unsigned i;
|
|
cmsFloat32Number x, y;
|
|
|
|
assert(xform->curve != NULL);
|
|
assert(len > 1);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
x = (double)i / (len - 1);
|
|
y = cmsEvalToneCurveFloat(xform->curve, x);
|
|
R_lut[i] = y;
|
|
G_lut[i] = y;
|
|
B_lut[i] = y;
|
|
}
|
|
}
|
|
|
|
void
|
|
cmlcms_color_transform_destroy(struct cmlcms_color_transform *xform)
|
|
{
|
|
wl_list_remove(&xform->link);
|
|
if (xform->curve)
|
|
cmsFreeToneCurve(xform->curve);
|
|
free(xform);
|
|
}
|
|
|
|
static struct cmlcms_color_transform *
|
|
cmlcms_color_transform_create(struct weston_color_manager_lcms *cm,
|
|
const struct cmlcms_color_transform_search_param *param)
|
|
{
|
|
struct cmlcms_color_transform *xform;
|
|
const struct tone_curve_def *tonedef;
|
|
|
|
if (param->type < 0 || param->type >= CMLCMS_TYPE__END) {
|
|
weston_log("color-lcms error: bad color transform type in %s.\n",
|
|
__func__);
|
|
return NULL;
|
|
}
|
|
tonedef = &predefined_eotf_curves[param->type];
|
|
|
|
xform = zalloc(sizeof *xform);
|
|
if (!xform)
|
|
return NULL;
|
|
|
|
xform->curve = cmsBuildParametricToneCurve(cm->lcms_ctx,
|
|
tonedef->cmstype,
|
|
tonedef->params);
|
|
if (xform->curve == NULL) {
|
|
weston_log("color-lcms error: failed to build parametric tone curve.\n");
|
|
free(xform);
|
|
return NULL;
|
|
}
|
|
|
|
weston_color_transform_init(&xform->base, &cm->base);
|
|
xform->search_key = *param;
|
|
|
|
xform->base.pre_curve.type = WESTON_COLOR_CURVE_TYPE_LUT_3x1D;
|
|
xform->base.pre_curve.u.lut_3x1d.fill_in = cmlcms_fill_in_tone_curve;
|
|
xform->base.pre_curve.u.lut_3x1d.optimal_len = 256;
|
|
|
|
wl_list_insert(&cm->color_transform_list, &xform->link);
|
|
|
|
return xform;
|
|
}
|
|
|
|
static bool
|
|
transform_matches_params(const struct cmlcms_color_transform *xform,
|
|
const struct cmlcms_color_transform_search_param *param)
|
|
{
|
|
if (xform->search_key.type != param->type)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
struct cmlcms_color_transform *
|
|
cmlcms_color_transform_get(struct weston_color_manager_lcms *cm,
|
|
const struct cmlcms_color_transform_search_param *param)
|
|
{
|
|
struct cmlcms_color_transform *xform;
|
|
|
|
wl_list_for_each(xform, &cm->color_transform_list, link) {
|
|
if (transform_matches_params(xform, param)) {
|
|
weston_color_transform_ref(&xform->base);
|
|
return xform;
|
|
}
|
|
}
|
|
|
|
xform = cmlcms_color_transform_create(cm, param);
|
|
if (!xform)
|
|
weston_log("color-lcms error: failed to create a color transformation.\n");
|
|
|
|
return xform;
|
|
}
|
|
|