1 /* GdkPixbuf library - Image creation from in-memory buffers
3 * Copyright (C) 1999 The Free Software Foundation
5 * Author: Federico Mena-Quintero <federico@gimp.org>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #include "gdk-pixbuf.h"
25 #include "gdk-pixbuf-private.h"
32 * gdk_pixbuf_new_from_data:
33 * @data: Image data in 8-bit/sample packed format.
34 * @colorspace: Colorspace for the image data.
35 * @has_alpha: Whether the data has an opacity channel.
36 * @bits_per_sample: Number of bits per sample.
37 * @width: Width of the image in pixels.
38 * @height: Height of the image in pixels.
39 * @rowstride: Distance in bytes between rows.
40 * @destroy_fn: Function used to free the data when the pixbuf's reference count
41 * drops to zero, or %NULL if the data should not be freed.
42 * @destroy_fn_data: Closure data to pass to the destroy notification function.
44 * Creates a new #GdkPixbuf out of in-memory image data. Currently only RGB
45 * images with 8 bits per sample are supported.
47 * Return value: A newly-created #GdkPixbuf structure with a reference count of
51 gdk_pixbuf_new_from_data (const guchar *data, GdkColorspace colorspace, gboolean has_alpha,
52 int bits_per_sample, int width, int height, int rowstride,
53 GdkPixbufDestroyNotify destroy_fn, gpointer destroy_fn_data)
57 /* Only 8-bit/sample RGB buffers are supported for now */
59 g_return_val_if_fail (data != NULL, NULL);
60 g_return_val_if_fail (colorspace == GDK_COLORSPACE_RGB, NULL);
61 g_return_val_if_fail (bits_per_sample == 8, NULL);
62 g_return_val_if_fail (width > 0, NULL);
63 g_return_val_if_fail (height > 0, NULL);
65 pixbuf = g_object_new (GDK_TYPE_PIXBUF, NULL);
67 pixbuf->colorspace = colorspace;
68 pixbuf->n_channels = has_alpha ? 4 : 3;
69 pixbuf->bits_per_sample = bits_per_sample;
70 pixbuf->has_alpha = has_alpha ? TRUE : FALSE;
71 pixbuf->width = width;
72 pixbuf->height = height;
73 pixbuf->rowstride = rowstride;
74 pixbuf->pixels = (guchar *) data;
75 pixbuf->destroy_fn = destroy_fn;
76 pixbuf->destroy_fn_data = destroy_fn_data;