gtk/gdk-pixbuf/gdk-pixbuf-data.c
Matthias Clasen ab74970131 Turn the pixbuf attributes into (construct-only, but always readable)
Sun Jan  4 00:44:57 2004  Matthias Clasen  <maclas@gmx.de>

	* gdk-pixbuf.c (gdk_pixbuf_class_init): Turn the pixbuf
	attributes into (construct-only, but always readable)
	properties.  (#130196)

	* gdk-pixbuf-data.c (gdk_pixbuf_new_from_data): Set properties
	in g_object_new().
2004-01-03 23:45:06 +00:00

80 lines
2.8 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* GdkPixbuf library - Image creation from in-memory buffers
*
* Copyright (C) 1999 The Free Software Foundation
*
* Author: Federico Mena-Quintero <federico@gimp.org>
*
* This 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 2 of the License, or (at your option) any later version.
*
* This 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 library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include "gdk-pixbuf.h"
#include "gdk-pixbuf-private.h"
#include <stdlib.h>
#include <string.h>
/**
* gdk_pixbuf_new_from_data:
* @data: Image data in 8-bit/sample packed format.
* @colorspace: Colorspace for the image data.
* @has_alpha: Whether the data has an opacity channel.
* @bits_per_sample: Number of bits per sample.
* @width: Width of the image in pixels.
* @height: Height of the image in pixels.
* @rowstride: Distance in bytes between row starts.
* @destroy_fn: Function used to free the data when the pixbuf's reference count
* drops to zero, or %NULL if the data should not be freed.
* @destroy_fn_data: Closure data to pass to the destroy notification function.
*
* Creates a new #GdkPixbuf out of in-memory image data. Currently only RGB
* images with 8 bits per sample are supported.
*
* Return value: A newly-created #GdkPixbuf structure with a reference count of 1.
**/
GdkPixbuf *
gdk_pixbuf_new_from_data (const guchar *data, GdkColorspace colorspace, gboolean has_alpha,
int bits_per_sample, int width, int height, int rowstride,
GdkPixbufDestroyNotify destroy_fn, gpointer destroy_fn_data)
{
GdkPixbuf *pixbuf;
/* Only 8-bit/sample RGB buffers are supported for now */
g_return_val_if_fail (data != NULL, NULL);
g_return_val_if_fail (colorspace == GDK_COLORSPACE_RGB, NULL);
g_return_val_if_fail (bits_per_sample == 8, NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
pixbuf = g_object_new (GDK_TYPE_PIXBUF,
"colorspace", colorspace,
"n_channels", has_alpha ? 4 : 3,
"bits_per_sample", bits_per_sample,
"has_alpha", has_alpha ? TRUE : FALSE,
"width", width,
"height", height,
"rowstride", rowstride,
"pixels", data,
NULL);
pixbuf->destroy_fn = destroy_fn;
pixbuf->destroy_fn_data = destroy_fn_data;
return pixbuf;
}