blob: 3650ba3d03fb39f9432b9d5df50a316eed0adc03 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*************************************************************************
* Copyright (C) 2009-2011 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
* Pigments.
*/
#include "dimension.h"
/* Allocate a dummy pigment */
dmnsn_pigment *
dmnsn_new_pigment(void)
{
dmnsn_pigment *pigment = dmnsn_malloc(sizeof(dmnsn_pigment));
pigment->pigment_fn = NULL;
pigment->initialize_fn = NULL;
pigment->free_fn = NULL;
pigment->trans = dmnsn_identity_matrix();
pigment->quick_color = dmnsn_black;
pigment->refcount = 1;
pigment->initialized = false;
return pigment;
}
/* Free a pigment */
void
dmnsn_delete_pigment(dmnsn_pigment *pigment)
{
if (DMNSN_DECREF(pigment)) {
if (pigment->free_fn) {
pigment->free_fn(pigment->ptr);
}
dmnsn_free(pigment);
}
}
/* Precompute pigment properties */
void
dmnsn_initialize_pigment(dmnsn_pigment *pigment)
{
dmnsn_assert(!pigment->initialized, "Pigment double-initialized.");
pigment->initialized = true;
if (pigment->initialize_fn) {
pigment->initialize_fn(pigment);
}
pigment->trans_inv = dmnsn_matrix_inverse(pigment->trans);
}
/* Evaluate a pigment */
dmnsn_color
dmnsn_evaluate_pigment(const dmnsn_pigment *pigment, dmnsn_vector v)
{
if (pigment->pigment_fn) {
dmnsn_vector v_trans = dmnsn_transform_point(pigment->trans_inv, v);
return pigment->pigment_fn(pigment, v_trans);
} else {
return pigment->quick_color;
}
}
|
