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/*************************************************************************
* Copyright (C) 2010-2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Pigment-mapped pigment patterns.
*/
#include "dimension.h"
/** Initialize a pigment in a pigment map. */
static void
dmnsn_initialize_mapped_pigment(void *ptr)
{
dmnsn_pigment **pigment = ptr;
dmnsn_initialize_pigment(*pigment);
}
/** Free a pigment in a pigment map. */
static void
dmnsn_delete_mapped_pigment(void *ptr)
{
dmnsn_pigment **pigment = ptr;
dmnsn_delete_pigment(*pigment);
}
dmnsn_map *
dmnsn_new_pigment_map(void)
{
dmnsn_map *pigment_map = dmnsn_new_map(sizeof(dmnsn_pigment *));
pigment_map->free_fn = dmnsn_delete_mapped_pigment;
return pigment_map;
}
/** Payload for a pigment_map pigment. */
typedef struct dmnsn_pigment_map_payload {
dmnsn_pattern *pattern;
dmnsn_map *map;
dmnsn_pigment_map_flags flags;
} dmnsn_pigment_map_payload;
void
dmnsn_pigment_map_add_color(dmnsn_map *map, double n, dmnsn_color color)
{
dmnsn_pigment *pigment = dmnsn_new_solid_pigment(color);
dmnsn_add_map_entry(map, n, &pigment);
}
/** Free a pigment_map payload. */
static void
dmnsn_delete_pigment_map_payload(void *ptr)
{
dmnsn_pigment_map_payload *payload = ptr;
dmnsn_delete_map(payload->map);
dmnsn_delete_pattern(payload->pattern);
dmnsn_free(payload);
}
/** pigment_map pigment callback. */
static dmnsn_color
dmnsn_pigment_map_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v)
{
const dmnsn_pigment_map_payload *payload = pigment->ptr;
double n;
dmnsn_pigment *pigment1, *pigment2;
dmnsn_evaluate_map(payload->map, dmnsn_pattern_value(payload->pattern, v),
&n, &pigment1, &pigment2);
dmnsn_color color1 = dmnsn_evaluate_pigment(pigment1, v);
dmnsn_color color2 = dmnsn_evaluate_pigment(pigment2, v);
if (payload->flags == DMNSN_PIGMENT_MAP_SRGB) {
color1 = dmnsn_color_to_sRGB(color1);
color2 = dmnsn_color_to_sRGB(color2);
}
dmnsn_color ret = dmnsn_color_gradient(color1, color2, n);
if (payload->flags == DMNSN_PIGMENT_MAP_SRGB) {
ret = dmnsn_color_from_sRGB(ret);
}
return ret;
}
/** pigment_map initialization callback. */
static void
dmnsn_pigment_map_initialize_fn(dmnsn_pigment *pigment)
{
dmnsn_pigment_map_payload *payload = pigment->ptr;
dmnsn_map_apply(payload->map, dmnsn_initialize_mapped_pigment);
}
dmnsn_pigment *
dmnsn_new_pigment_map_pigment(dmnsn_pattern *pattern, dmnsn_map *map,
dmnsn_pigment_map_flags flags)
{
dmnsn_pigment *pigment = dmnsn_new_pigment();
dmnsn_pigment_map_payload *payload
= dmnsn_malloc(sizeof(dmnsn_pigment_map_payload));
payload->pattern = pattern;
payload->map = map;
payload->flags = flags;
pigment->pigment_fn = dmnsn_pigment_map_pigment_fn;
pigment->initialize_fn = dmnsn_pigment_map_initialize_fn;
pigment->free_fn = dmnsn_delete_pigment_map_payload;
pigment->ptr = payload;
return pigment;
}
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