/* 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, see <http://www.gnu.org/licenses/>.

 */

#include "config.h"

#include "gdk-pixbuf.h"

#include "gdk-pixbuf-private.h"

#include <stdlib.h>

#include <string.h>

/**

 * gdk_pixbuf_new_from_data:

 * @data: (array): 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, must be > 0

 * @height: Height of the image in pixels, must be > 0

 * @rowstride: Distance in bytes between row starts

 * @destroy_fn: (scope async) (allow-none): 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): 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.

 *

 * Since you are providing a pre-allocated pixel buffer, you must also

 * specify a way to free that data.  This is done with a function of

 * type #GdkPixbufDestroyNotify.  When a pixbuf created with is

 * finalized, your destroy notification function will be called, and

 * it is its responsibility to free the pixel array.

 *

 * See also gdk_pixbuf_new_from_bytes().

 *

 * Return value: (transfer full): 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;

}

/**

 * gdk_pixbuf_new_from_bytes:

 * @data: Image data in 8-bit/sample packed format inside a #GBytes

 * @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, must be > 0

 * @height: Height of the image in pixels, must be > 0

 * @rowstride: Distance in bytes between row starts

 * 

 * Creates a new #GdkPixbuf out of in-memory readonly image data.

 * Currently only RGB images with 8 bits per sample are supported.

 * This is the #GBytes variant of gdk_pixbuf_new_from_data().

 *

 * Return value: (transfer full): A newly-created #GdkPixbuf structure with a reference count of 1.

 * Since: 2.32

 **/

GdkPixbuf *

gdk_pixbuf_new_from_bytes (GBytes *data, GdkColorspace colorspace, gboolean has_alpha,

			   int bits_per_sample, int width, int height, int rowstride)

{

	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);

	g_return_val_if_fail (g_bytes_get_size (data) >= width * height * (has_alpha ? 4 : 3), NULL);

	return (GdkPixbuf*) g_object_new (GDK_TYPE_PIXBUF, 

					  "pixel-bytes", data,

					  "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,

					  NULL);

}