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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimppixbuf.c
* Copyright (C) 2012 Michael Natterer <mitch@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 3 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
* Library 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
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "gimpcolortypes.h"
#include "gimppixbuf.h"
/**
* SECTION: gimppixbuf
* @title: GimpPixbuf
* @short_description: Definitions and Functions relating to GdkPixbuf.
*
* Definitions and Functions relating to GdkPixbuf.
**/
/**
* gimp_pixbuf_get_format:
* @pixbuf: a #GdkPixbuf
*
* Returns the Babl format that corresponds to the @pixbuf's pixel format.
*
* Return value: the @pixbuf's pixel format
*
* Since: 2.10
**/
const Babl *
gimp_pixbuf_get_format (GdkPixbuf *pixbuf)
{
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
switch (gdk_pixbuf_get_n_channels (pixbuf))
{
case 3: return babl_format ("R'G'B' u8");
case 4: return babl_format ("R'G'B'A u8");
}
g_return_val_if_reached (NULL);
}
/**
* gimp_pixbuf_create_buffer:
* @pixbuf: a #GdkPixbuf
*
* Returns a #GeglBuffer that's either backed by the @pixbuf's pixels,
* or a copy of them. This function tries to not copy the @pixbuf's
* pixels. If the pixbuf's rowstride is a multiple of its bpp, a
* simple reference to the @pixbuf's pixels is made and @pixbuf will
* be kept around for as long as the buffer exists; otherwise the
* pixels are copied.
*
* Return value: a new #GeglBuffer.
*
* Since: 2.10
**/
GeglBuffer *
gimp_pixbuf_create_buffer (GdkPixbuf *pixbuf)
{
gint width;
gint height;
gint rowstride;
gint bpp;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
bpp = gdk_pixbuf_get_n_channels (pixbuf);
if ((rowstride % bpp) == 0)
{
return gegl_buffer_linear_new_from_data (gdk_pixbuf_get_pixels (pixbuf),
gimp_pixbuf_get_format (pixbuf),
GEGL_RECTANGLE (0, 0,
width, height),
rowstride,
(GDestroyNotify) g_object_unref,
g_object_ref (pixbuf));
}
else
{
GeglBuffer *buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
width, height),
gimp_pixbuf_get_format (pixbuf));
gegl_buffer_set (buffer, NULL, 0, NULL,
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf));
return buffer;
}
}
/**
* gimp_pixbuf_get_icc_profile:
* @pixbuf: a #GdkPixbuf
* @length: return location for the ICC profile's length
*
* Returns the ICC profile attached to the @pixbuf, or %NULL if there
* is none.
*
* Return value: The ICC profile data, or %NULL. The value should be freed
* with g_free().
*
* Since: 2.10
**/
guint8 *
gimp_pixbuf_get_icc_profile (GdkPixbuf *pixbuf,
gsize *length)
{
const gchar *icc_base64;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (length != NULL, NULL);
icc_base64 = gdk_pixbuf_get_option (pixbuf, "icc-profile");
if (icc_base64)
{
guint8 *icc_data;
icc_data = g_base64_decode (icc_base64, length);
return icc_data;
}
return NULL;
}
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