1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <string.h>
25 #include <gst/gst.h>
26
27 #include "flx_color.h"
28
29 FlxColorSpaceConverter *
flx_colorspace_converter_new(gint width,gint height)30 flx_colorspace_converter_new (gint width, gint height)
31 {
32 FlxColorSpaceConverter *new = g_malloc (sizeof (FlxColorSpaceConverter));
33
34 new->width = width;
35 new->height = height;
36
37 memset (new->palvec, 0, sizeof (new->palvec));
38 return new;
39 }
40
41 void
flx_colorspace_converter_destroy(FlxColorSpaceConverter * flxpal)42 flx_colorspace_converter_destroy (FlxColorSpaceConverter * flxpal)
43 {
44 g_return_if_fail (flxpal != NULL);
45
46 g_free (flxpal);
47 }
48
49 void
flx_colorspace_convert(FlxColorSpaceConverter * flxpal,guchar * src,guchar * dest)50 flx_colorspace_convert (FlxColorSpaceConverter * flxpal, guchar * src,
51 guchar * dest)
52 {
53 guint size, col;
54
55 g_return_if_fail (flxpal != NULL);
56 g_return_if_fail (src != dest);
57
58
59 size = flxpal->width * flxpal->height;
60
61 while (size--) {
62 col = (*src++ * 3);
63
64 #if G_BYTE_ORDER == G_BIG_ENDIAN
65 *dest++ = 0;
66 *dest++ = flxpal->palvec[col];
67 *dest++ = flxpal->palvec[col + 1];
68 *dest++ = flxpal->palvec[col + 2];
69 #else
70 *dest++ = flxpal->palvec[col + 2];
71 *dest++ = flxpal->palvec[col + 1];
72 *dest++ = flxpal->palvec[col];
73 *dest++ = 0;
74 #endif
75 }
76
77 }
78
79
80 void
flx_set_palette_vector(FlxColorSpaceConverter * flxpal,guint start,guint num,guchar * newpal,gint scale)81 flx_set_palette_vector (FlxColorSpaceConverter * flxpal, guint start, guint num,
82 guchar * newpal, gint scale)
83 {
84 guint grab;
85
86 g_return_if_fail (flxpal != NULL);
87 g_return_if_fail (start < 0x100);
88
89 grab = ((start + num) > 0x100 ? 0x100 - start : num);
90
91 if (scale) {
92 gint i = 0;
93
94 start *= 3;
95 while (grab) {
96 flxpal->palvec[start++] = newpal[i++] << scale;
97 flxpal->palvec[start++] = newpal[i++] << scale;
98 flxpal->palvec[start++] = newpal[i++] << scale;
99 grab--;
100 }
101 } else {
102 memcpy (&flxpal->palvec[start * 3], newpal, grab * 3);
103 }
104 }
105
106 void
flx_set_color(FlxColorSpaceConverter * flxpal,guint colr,guint red,guint green,guint blue,gint scale)107 flx_set_color (FlxColorSpaceConverter * flxpal, guint colr, guint red,
108 guint green, guint blue, gint scale)
109 {
110
111 g_return_if_fail (flxpal != NULL);
112 g_return_if_fail (colr < 0x100);
113
114 flxpal->palvec[(colr * 3)] = red << scale;
115 flxpal->palvec[(colr * 3) + 1] = green << scale;
116 flxpal->palvec[(colr * 3) + 2] = blue << scale;
117 }
118