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weston/compositor/cms-helper.c

136 lines
3.5 KiB

/*
* Copyright © 2013 Richard Hughes
*
* 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 <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#ifdef HAVE_LCMS
#include <lcms2.h>
#endif
#include <libweston/libweston.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 = zalloc(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;
}