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| -rw-r--r-- | libdimension/pigment_map.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/libdimension/pigment_map.c b/libdimension/pigment_map.c new file mode 100644 index 0000000..8fe825d --- /dev/null +++ b/libdimension/pigment_map.c @@ -0,0 +1,108 @@ +/************************************************************************* + * Copyright (C) 2010 Tavian Barnes <tavianator@gmail.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() +{ + 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_payload; + +/** 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 = (*pigment1->pigment_fn)(pigment1, v); + dmnsn_color color2 = (*pigment2->pigment_fn)(pigment2, v); + return dmnsn_color_gradient(color1, color2, n); +} + +/** pigment_map initialization callback. */ +static void +dmnsn_pigment_map_initialize_fn(dmnsn_pigment *pigment) +{ + dmnsn_pigment_map_payload *payload = pigment->ptr; + payload->pattern->trans = dmnsn_matrix_mul(pigment->trans, + payload->pattern->trans); + dmnsn_initialize_pattern(payload->pattern); + dmnsn_map_apply(payload->map, &dmnsn_initialize_mapped_pigment); +} + +dmnsn_pigment * +dmnsn_new_pigment_map_pigment(dmnsn_pattern *pattern, dmnsn_map *map) +{ + dmnsn_pigment *pigment = dmnsn_new_pigment(); + + dmnsn_pigment_map_payload *payload + = dmnsn_malloc(sizeof(dmnsn_pigment_map_payload)); + payload->pattern = pattern; + payload->map = map; + + 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; +} |