1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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 "gstmask.h"
25 #include "paint.h"
26
27 static GList *masks = NULL;
28
29 void
_gst_mask_init(void)30 _gst_mask_init (void)
31 {
32 _gst_barboxwipes_register ();
33 }
34
35 static gint
gst_mask_compare(GstMaskDefinition * def1,GstMaskDefinition * def2)36 gst_mask_compare (GstMaskDefinition * def1, GstMaskDefinition * def2)
37 {
38 return (def1->type - def2->type);
39 }
40
41 void
_gst_mask_register(const GstMaskDefinition * definition)42 _gst_mask_register (const GstMaskDefinition * definition)
43 {
44 masks =
45 g_list_insert_sorted (masks, (gpointer) definition,
46 (GCompareFunc) gst_mask_compare);
47 }
48
49 const GList *
gst_mask_get_definitions(void)50 gst_mask_get_definitions (void)
51 {
52 return masks;
53 }
54
55 static GstMaskDefinition *
gst_mask_find_definition(gint type)56 gst_mask_find_definition (gint type)
57 {
58 GList *walk = masks;
59
60 while (walk) {
61 GstMaskDefinition *def = (GstMaskDefinition *) walk->data;
62
63 if (def->type == type)
64 return def;
65
66 walk = g_list_next (walk);
67 }
68 return NULL;
69 }
70
71 GstMask *
gst_mask_factory_new(gint type,gboolean invert,gint bpp,gint width,gint height)72 gst_mask_factory_new (gint type, gboolean invert, gint bpp, gint width,
73 gint height)
74 {
75 GstMaskDefinition *definition;
76 GstMask *mask = NULL;
77
78 definition = gst_mask_find_definition (type);
79 if (definition) {
80 mask = g_new0 (GstMask, 1);
81
82 mask->type = definition->type;
83 mask->bpp = bpp;
84 mask->width = width;
85 mask->height = height;
86 mask->destroy_func = definition->destroy_func;
87 mask->user_data = definition->user_data;
88
89 if (((guint64) width * (guint64) height * sizeof (guint32)) > G_MAXUINT) {
90 GST_WARNING ("width x height overflows");
91 g_free (mask);
92 return NULL;
93 }
94
95 mask->data = g_malloc (width * height * sizeof (guint32));
96
97 definition->draw_func (mask);
98
99 if (invert) {
100 gint i, j;
101 guint32 *datap = mask->data;
102 guint32 max = (1 << bpp);
103
104 for (i = 0; i < height; i++) {
105 for (j = 0; j < width; j++) {
106 *datap = max - *datap;
107 datap++;
108 }
109 }
110 }
111 }
112
113 return mask;
114 }
115
116 void
_gst_mask_default_destroy(GstMask * mask)117 _gst_mask_default_destroy (GstMask * mask)
118 {
119 g_free (mask->data);
120 g_free (mask);
121 }
122
123 void
gst_mask_destroy(GstMask * mask)124 gst_mask_destroy (GstMask * mask)
125 {
126 if (mask->destroy_func)
127 mask->destroy_func (mask);
128 }
129