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
|
/*************************************************************************
* 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/>. *
*************************************************************************/
/*
* A canvas which is rendered to.
*/
#ifndef DIMENSION_CANVAS_H
#define DIMENSION_CANVAS_H
#include <stddef.h>
typedef struct {
/* width, height */
size_t x, y;
/* An array of dmnsn_canvas_optimizer's */
dmnsn_array *optimizers;
/*
* Stored in first-quadrant representation (origin is bottom-left). The pixel
* at (a,b) is accessible as pixels[b*x + a].
*/
dmnsn_color *pixels;
} dmnsn_canvas;
/* Forward-declare dmnsn_canvas_optimizer */
typedef struct dmnsn_canvas_optimizer dmnsn_canvas_optimizer;
/* Canvas optimizer callback types */
typedef void dmnsn_canvas_optimizer_fn(dmnsn_canvas *canvas,
dmnsn_canvas_optimizer optimizer,
size_t x, size_t y);
/* Canvas optimizer */
struct dmnsn_canvas_optimizer {
/* Callback types */
dmnsn_canvas_optimizer_fn *optimizer_fn;
dmnsn_free_fn *free_fn;
/* Generic pointer */
void *ptr;
};
/* Allocate and free a canvas */
dmnsn_canvas *dmnsn_new_canvas(size_t x, size_t y);
void dmnsn_delete_canvas(dmnsn_canvas *canvas);
/* Set a canvas optimizer */
void dmnsn_optimize_canvas(dmnsn_canvas *canvas,
dmnsn_canvas_optimizer optimizer);
/* Pixel accessors */
DMNSN_INLINE dmnsn_color
dmnsn_get_pixel(const dmnsn_canvas *canvas, size_t x, size_t y)
{
return canvas->pixels[y*canvas->x + x];
}
void dmnsn_set_pixel(dmnsn_canvas *canvas, size_t x, size_t y,
dmnsn_color color);
void dmnsn_clear_canvas(dmnsn_canvas *canvas, dmnsn_color color);
#endif /* DIMENSION_CANVAS_H */
|
