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/*
* Copyright © 2013 Richard Hughes
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifdef HAVE_LCMS
#include <lcms2.h>
#endif
#include "compositor.h"
#include "cms-helper.h"
#ifdef HAVE_LCMS
static void
weston_cms_gamma_clear(struct weston_output *o)
{
int i;
uint16_t *red;
if (!o->set_gamma)
return;
red = calloc(o->gamma_size, sizeof(uint16_t));
for (i = 0; i < o->gamma_size; i++)
red[i] = (uint32_t) 0xffff * (uint32_t) i / (uint32_t) (o->gamma_size - 1);
o->set_gamma(o, o->gamma_size, red, red, red);
free(red);
}
#endif
void
weston_cms_set_color_profile(struct weston_output *o,
struct weston_color_profile *p)
{
#ifdef HAVE_LCMS
cmsFloat32Number in;
const cmsToneCurve **vcgt;
int i;
int size;
uint16_t *red = NULL;
uint16_t *green = NULL;
uint16_t *blue = NULL;
if (!o->set_gamma)
return;
if (!p) {
weston_cms_gamma_clear(o);
return;
}
weston_log("Using ICC profile %s\n", p->filename);
vcgt = cmsReadTag (p->lcms_handle, cmsSigVcgtTag);
if (vcgt == NULL || vcgt[0] == NULL) {
weston_cms_gamma_clear(o);
return;
}
size = o->gamma_size;
red = calloc(size, sizeof(uint16_t));
green = calloc(size, sizeof(uint16_t));
blue = calloc(size, sizeof(uint16_t));
for (i = 0; i < size; i++) {
in = (cmsFloat32Number) i / (cmsFloat32Number) (size - 1);
red[i] = cmsEvalToneCurveFloat(vcgt[0], in) * (double) 0xffff;
green[i] = cmsEvalToneCurveFloat(vcgt[1], in) * (double) 0xffff;
blue[i] = cmsEvalToneCurveFloat(vcgt[2], in) * (double) 0xffff;
}
o->set_gamma(o, size, red, green, blue);
free(red);
free(green);
free(blue);
#endif
}
void
weston_cms_destroy_profile(struct weston_color_profile *p)
{
if (!p)
return;
#ifdef HAVE_LCMS
cmsCloseProfile(p->lcms_handle);
#endif
free(p->filename);
free(p);
}
struct weston_color_profile *
weston_cms_create_profile(const char *filename,
void *lcms_profile)
{
struct weston_color_profile *p;
p = calloc(1, sizeof(struct weston_color_profile));
p->filename = strdup(filename);
p->lcms_handle = lcms_profile;
return p;
}
struct weston_color_profile *
weston_cms_load_profile(const char *filename)
{
struct weston_color_profile *p = NULL;
#ifdef HAVE_LCMS
cmsHPROFILE lcms_profile;
lcms_profile = cmsOpenProfileFromFile(filename, "r");
if (lcms_profile)
p = weston_cms_create_profile(filename, lcms_profile);
#endif
return p;
}
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