blob: 487a8dce07e10256bb0d40c31d7ea25d9f328b64 (
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
80
81
82
83
84
85
86
87
88
89
90
|
/*************************************************************************
* 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
* Object pigments.
*/
/* Forward-declare dmnsn_pigment */
typedef struct dmnsn_pigment dmnsn_pigment;
/**
* Pigment callback.
* @param[in] pigment The pigment itself.
* @param[in] v The point to color.
* @return The color of the pigment at \p v.
*/
typedef dmnsn_color dmnsn_pigment_fn(const dmnsn_pigment *pigment,
dmnsn_vector v);
/**
* Pigment initializer callback.
* @param[in,out] pigment The pigment to initialize.
*/
typedef void dmnsn_pigment_initialize_fn(dmnsn_pigment *pigment);
/** A pigment. */
struct dmnsn_pigment {
dmnsn_pigment_fn *pigment_fn; /**< The pigment callback. */
dmnsn_pigment_initialize_fn *initialize_fn; /**< The initializer callback. */
dmnsn_free_fn *free_fn; /**< The destructor callback. */
dmnsn_matrix trans; /**< Transformation matrix. */
dmnsn_matrix trans_inv; /**< The inverse of the transformation matrix. */
/** Quick color -- used for low-quality renders. */
dmnsn_color quick_color;
/** Generic pointer. */
void *ptr;
dmnsn_refcount refcount; /** @internal Reference count. */
bool initialized; /** @internal Whether the pigment is initialized. */
};
/**
* Allocate a new dummy pigment.
* @return The allocated pigment.
*/
dmnsn_pigment *dmnsn_new_pigment(void);
/**
* Delete a pigment.
* @param[in,out] pigment The pigment to delete.
*/
void dmnsn_delete_pigment(dmnsn_pigment *pigment);
/**
* Initialize a pigment. Pigments should not be used before being initialized,
* but should not be modified after being initialized. Pigments are generally
* initialized for you.
* @param[in,out] pigment The pigment to initialize.
*/
void dmnsn_initialize_pigment(dmnsn_pigment *pigment);
/**
* Evaluate the color of a pigment at a point.
* @param[in] pigment The pigment to evaluate.
* @param[in] v The point to color.
* @return The color at \p v.
*/
dmnsn_color dmnsn_evaluate_pigment(const dmnsn_pigment *pigment,
dmnsn_vector v);
|
