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/* Copyright (C) 2016 Red Hat, Inc.
*
* 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 "gdkpixbufutilsprivate.h"
static GdkPixbuf *
load_from_stream (GdkPixbufLoader *loader,
GInputStream *stream,
GCancellable *cancellable,
GError **error)
{
GdkPixbuf *pixbuf;
gssize n_read;
guchar buffer[65536];
gboolean res;
res = TRUE;
while (1)
{
n_read = g_input_stream_read (stream, buffer, sizeof (buffer), cancellable, error);
if (n_read < 0)
{
res = FALSE;
error = NULL; /* Ignore further errors */
break;
}
if (n_read == 0)
break;
if (!gdk_pixbuf_loader_write (loader, buffer, n_read, error))
{
res = FALSE;
error = NULL;
break;
}
}
if (!gdk_pixbuf_loader_close (loader, error))
{
res = FALSE;
error = NULL;
}
pixbuf = NULL;
if (res)
{
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
if (pixbuf)
g_object_ref (pixbuf);
}
return pixbuf;
}
static void
size_prepared_cb (GdkPixbufLoader *loader,
gint width,
gint height,
gpointer data)
{
gdouble *scale = data;
width = MAX (*scale * width, 1);
height = MAX (*scale * height, 1);
gdk_pixbuf_loader_set_size (loader, width, height);
}
/* Like gdk_pixbuf_new_from_stream_at_scale, but
* load the image at its original size times the
* given scale.
*/
GdkPixbuf *
_gdk_pixbuf_new_from_stream_scaled (GInputStream *stream,
gdouble scale,
GCancellable *cancellable,
GError **error)
{
GdkPixbufLoader *loader;
GdkPixbuf *pixbuf;
loader = gdk_pixbuf_loader_new ();
g_signal_connect (loader, "size-prepared",
G_CALLBACK (size_prepared_cb), &scale);
pixbuf = load_from_stream (loader, stream, cancellable, error);
g_object_unref (loader);
return pixbuf;
}
/* Like gdk_pixbuf_new_from_resource_at_scale, but
* load the image at its original size times the
* given scale.
*/
GdkPixbuf *
_gdk_pixbuf_new_from_resource_scaled (const gchar *resource_path,
gdouble scale,
GError **error)
{
GInputStream *stream;
GdkPixbuf *pixbuf;
stream = g_resources_open_stream (resource_path, 0, error);
if (stream == NULL)
return NULL;
pixbuf = _gdk_pixbuf_new_from_stream_scaled (stream, scale, NULL, error);
g_object_unref (stream);
return pixbuf;
}
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