ev-image.c

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/* this file is part of evince, a gnome document viewer
 *
 *  Copyright (C) 2006 Carlos Garcia Campos <carlosgc@gnome.org>
 *
 * Evince is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Evince 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include <config.h>

#include <glib/gstdio.h>
#include <unistd.h>

#include "ev-document-misc.h"
#include "ev-file-helpers.h"
#include "ev-image.h"

struct _EvImagePrivate {
    gint       page;
    gint       id;
    GdkPixbuf *pixbuf;
    gchar     *tmp_uri;
};

#define EV_IMAGE_GET_PRIVATE(object) \
                (G_TYPE_INSTANCE_GET_PRIVATE ((object), EV_TYPE_IMAGE, EvImagePrivate))

G_DEFINE_TYPE (EvImage, ev_image, G_TYPE_OBJECT)

static void
ev_image_finalize (GObject *object)
{
    EvImage *image = EV_IMAGE (object);

    if (image->priv->pixbuf) {
        g_object_unref (image->priv->pixbuf);
        image->priv->pixbuf = NULL;
    }

    if (image->priv->tmp_uri) {
        gchar *filename;

        filename = g_filename_from_uri (image->priv->tmp_uri, NULL, NULL);
        ev_tmp_filename_unlink (filename);
        g_free (filename);
        g_free (image->priv->tmp_uri);
        image->priv->tmp_uri = NULL;
    }

    (* G_OBJECT_CLASS (ev_image_parent_class)->finalize) (object);
}

static void
ev_image_class_init (EvImageClass *klass)
{
    GObjectClass *g_object_class;

    g_object_class = G_OBJECT_CLASS (klass);

    g_type_class_add_private (g_object_class, sizeof (EvImagePrivate));

    g_object_class->finalize = ev_image_finalize;
}

static void
ev_image_init (EvImage *image)
{
    image->priv = EV_IMAGE_GET_PRIVATE (image);
}

EvImage *
ev_image_new (gint page,
          gint img_id)
{
    EvImage *image;

    image = EV_IMAGE (g_object_new (EV_TYPE_IMAGE, NULL));
    image->priv->page = page;
    image->priv->id = img_id;

    return image;
}

EvImage *
ev_image_new_from_pixbuf (GdkPixbuf *pixbuf)
{
    EvImage *image;

    g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);

    image = EV_IMAGE (g_object_new (EV_TYPE_IMAGE, NULL));
    image->priv->pixbuf = g_object_ref (pixbuf);

    return image;
}

gint
ev_image_get_page (EvImage *image)
{
    g_return_val_if_fail (EV_IS_IMAGE (image), -1);

    return image->priv->page;
}

gint
ev_image_get_id (EvImage *image)
{
    g_return_val_if_fail (EV_IS_IMAGE (image), -1);

    return image->priv->id;
}

GdkPixbuf *
ev_image_get_pixbuf (EvImage *image)
{
    g_return_val_if_fail (EV_IS_IMAGE (image), NULL);
    g_return_val_if_fail (GDK_IS_PIXBUF (image->priv->pixbuf), NULL);

    return image->priv->pixbuf;
}

const gchar *
ev_image_save_tmp (EvImage   *image,
           GdkPixbuf *pixbuf)
{
    GError *error = NULL;
    gchar  *filename = NULL;
        int fd;
    
    g_return_val_if_fail (EV_IS_IMAGE (image), NULL);
    g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);

    if (image->priv->tmp_uri)
        return image->priv->tmp_uri;

    if ((fd = ev_mkstemp ("image.XXXXXX.png", &filename, &error)) == -1)
        goto had_error;

    gdk_pixbuf_save (pixbuf, filename,
             "png", &error,
             "compression", "3", NULL);
        close (fd);

    if (!error) {
        image->priv->tmp_uri = g_filename_to_uri (filename, NULL, &error);
                if (image->priv->tmp_uri == NULL)
                        goto had_error;

        g_free (filename);
        
        return image->priv->tmp_uri;
    }

    had_error:

    /* Erro saving image */
    g_warning ("Error saving image: %s", error->message);
    g_error_free (error);
    g_free (filename);

    return NULL;
}

const gchar *
ev_image_get_tmp_uri (EvImage *image)
{
    g_return_val_if_fail (EV_IS_IMAGE (image), NULL);

    return image->priv->tmp_uri;
}