summaryrefslogtreecommitdiffstats
path: root/libdimension/canvas.c
blob: 2c60c607367da31cc9bd1c82b36acd23cfcf3c0b (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
91
92
93
94
/*************************************************************************
 * 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/>.                                       *
 *************************************************************************/

#include "dimension.h"
#include <pthread.h>
#include <stdlib.h> /* For free() */

/* Allocate a new canvas, of width x and height y */
dmnsn_canvas *
dmnsn_new_canvas(size_t x, size_t y)
{
  /* Allocate the dmnsn_canvas struct */
  dmnsn_canvas *canvas = dmnsn_malloc(sizeof(dmnsn_canvas));

  /* Set the width and height */
  canvas->x = x;
  canvas->y = y;

  /* Allocate room for the optimizers */
  canvas->optimizers = dmnsn_new_array(sizeof(dmnsn_canvas_optimizer));

  /* Allocate the pixels */
  canvas->pixels = dmnsn_malloc(sizeof(dmnsn_color)*x*y);

  return canvas;
}

/* Delete a dmnsn_canvas allocated with dmnsn_new_canvas */
void
dmnsn_delete_canvas(dmnsn_canvas *canvas)
{
  if (canvas) {
    /* Free the optimizers */
    DMNSN_ARRAY_FOREACH(dmnsn_canvas_optimizer *, i, canvas->optimizers) {
      if (i->free_fn) {
        (*i->free_fn)(i->ptr);
      }
    }
    dmnsn_delete_array(canvas->optimizers);

    /* Free the pixels and canvas */
    free(canvas->pixels);
    free(canvas);
  }
}

/* Set a canvas optimizer */
void
dmnsn_optimize_canvas(dmnsn_canvas *canvas, dmnsn_canvas_optimizer optimizer)
{
  dmnsn_array_push(canvas->optimizers, &optimizer);
}

/* Set the color of a pixel */
void
dmnsn_set_pixel(dmnsn_canvas *canvas, size_t x, size_t y,
                dmnsn_color color)
{
  /* Set the pixel */
  canvas->pixels[y*canvas->x + x] = color;

  /* Call the optimizers */
  DMNSN_ARRAY_FOREACH (dmnsn_canvas_optimizer *, i, canvas->optimizers) {
    (*i->optimizer_fn)(canvas, *i, x, y);
  }
}

/* Fill a canvas with a solid color */
void
dmnsn_clear_canvas(dmnsn_canvas *canvas, dmnsn_color color)
{
  for (size_t x = 0; x < canvas->x; ++x) {
    for (size_t y = 0; y < canvas->y; ++y) {
      dmnsn_set_pixel(canvas, x, y, color);
    }
  }
}