rsvg-base-file-util.c

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
   rsvg-file-util.c: SAX-based renderer for SVG files into a GdkPixbuf.

   Copyright (C) 2000 Eazel, Inc.
   Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This program 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 Library General Public
   License along with this program; if not, write to the
   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Author: Raph Levien <raph@artofcode.com>
*/

#include "config.h"
#include "rsvg.h"
#include "rsvg-io.h"
#include "rsvg-private.h"

static gboolean
rsvg_handle_fill_with_data (RsvgHandle * handle,
                            const char * data, gsize data_len, GError ** error)
{
    gboolean rv;

    rsvg_return_val_if_fail (data != NULL, FALSE, error);
    rsvg_return_val_if_fail (data_len != 0, FALSE, error);

    rv = rsvg_handle_write (handle, (guchar *) data, data_len, error);

    return rsvg_handle_close (handle, rv ? error : NULL) && rv;
}

/**
 * rsvg_handle_new_from_data:
 * @data: (array length=data_len): The SVG data
 * @data_len: The length of @data, in bytes
 * @error: return location for errors
 *
 * Loads the SVG specified by @data.
 *
 * Returns: A #RsvgHandle or %NULL if an error occurs.
 * Since: 2.14
 */
RsvgHandle *
rsvg_handle_new_from_data (const guint8 * data, gsize data_len, GError ** error)
{
    RsvgHandle *handle;

    handle = rsvg_handle_new ();

    if (handle) {
        if (!rsvg_handle_fill_with_data (handle, (char *) data, data_len, error)) {
            g_object_unref (handle);
            handle = NULL;
        }
    }

    return handle;
}

/**
 * rsvg_handle_new_from_file:
 * @file_name: The file name to load. If built with gnome-vfs, can be a URI.
 * @error: return location for errors
 *
 * Loads the SVG specified by @file_name.
 *
 * Returns: A #RsvgHandle or %NULL if an error occurs.
 * Since: 2.14
 */
RsvgHandle *
rsvg_handle_new_from_file (const gchar * file_name, GError ** error)
{
    gchar *base_uri;
    char *data;
    gsize data_len;
    RsvgHandle *handle = NULL;
    GFile *file;

    rsvg_return_val_if_fail (file_name != NULL, NULL, error);

    file = g_file_new_for_path (file_name);
    base_uri = g_file_get_uri (file);
    if (!base_uri) {
        g_set_error (error,
                     G_IO_ERROR,
                     G_IO_ERROR_FAILED,
                     _("Cannot obtain URI from '%s'"), file_name);
        g_object_unref (file);
        return NULL;
    }

    data = _rsvg_io_acquire_data (base_uri, base_uri, NULL, &data_len, NULL, error);

    if (data) {
        handle = rsvg_handle_new ();
        rsvg_handle_set_base_uri (handle, base_uri);
        if (!rsvg_handle_fill_with_data (handle, data, data_len, error)) {
            g_object_unref (handle);
            handle = NULL;
        }
        g_free (data);
    }

    g_free (base_uri);
    g_object_unref (file);

    return handle;
}