static int
rsvg_defs_load_extern (const RsvgDefs * defs, const char *name)
{
RsvgHandle *handle;
gchar *filename, *base_uri;
GByteArray *chars;
filename = rsvg_get_file_path (name, defs->base_uri);
chars = _rsvg_acquire_xlink_href_resource (name, defs->base_uri, NULL);
if (chars) {
handle = rsvg_handle_new ();
base_uri = rsvg_get_base_uri_from_filename (filename);
rsvg_handle_set_base_uri (handle, base_uri);
g_free (base_uri);
if (rsvg_handle_write (handle, chars->data, chars->len, NULL) &&
rsvg_handle_close (handle, NULL)) {
g_hash_table_insert (defs->externs, g_strdup (name), handle);
}
g_byte_array_free (chars, TRUE);
}
g_free (filename);
return 0;
}
static void
draw_page (GtkPrintOperation *operation,
GtkPrintContext *context,
gint page_nr,
gpointer user_data)
{
ViewerCbInfo *info = (ViewerCbInfo *) user_data;
cairo_t *cr;
gdouble page_width, page_height;
cr = gtk_print_context_get_cairo_context (context);
page_width = gtk_print_context_get_width (context);
page_height = gtk_print_context_get_height (context);
{
RsvgHandle *handle;
RsvgDimensionData svg_dimensions;
struct RsvgSizeCallbackData size_data;
/* should not fail */
handle = rsvg_handle_new_from_data(info->svg_bytes->data, info->svg_bytes->len, NULL);
rsvg_handle_set_base_uri (handle, info->base_uri);
rsvg_handle_set_dpi_x_y (handle, gtk_print_context_get_dpi_x(context),
gtk_print_context_get_dpi_y(context));
rsvg_handle_get_dimensions(handle, &svg_dimensions);
if (svg_dimensions.width > page_width || svg_dimensions.height > page_height) {
/* scale down the image to the page's size, while preserving the aspect ratio */
if ((double) svg_dimensions.height * (double) page_width > (double) svg_dimensions.width * (double) page_height) {
svg_dimensions.width = 0.5 + (double) svg_dimensions.width *(double) page_height / (double) svg_dimensions.height;
svg_dimensions.height = page_height;
} else {
svg_dimensions.height = 0.5 + (double) svg_dimensions.height *(double) page_width / (double) svg_dimensions.width;
svg_dimensions.width = page_width;
}
}
size_data.type = RSVG_SIZE_WH;
size_data.width = svg_dimensions.width;
size_data.height = svg_dimensions.height;
size_data.keep_aspect_ratio = FALSE;
rsvg_handle_set_size_callback (handle, _rsvg_size_callback, &size_data, NULL);
rsvg_handle_render_cairo(handle, cr);
g_object_unref (handle);
}
}
static void
set_property (GObject * instance, guint prop_id, GValue const *value, GParamSpec * pspec)
{
RsvgHandle *self = RSVG_HANDLE (instance);
switch (prop_id) {
case PROP_DPI_X:
rsvg_handle_set_dpi_x_y (self, g_value_get_double (value), self->priv->dpi_y);
break;
case PROP_DPI_Y:
rsvg_handle_set_dpi_x_y (self, self->priv->dpi_x, g_value_get_double (value));
break;
case PROP_BASE_URI:
rsvg_handle_set_base_uri (self, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (instance, prop_id, pspec);
}
}
static GdkPixbuf *
pixbuf_from_data_with_size_data (const guchar * buff,
size_t len,
struct RsvgSizeCallbackData *data,
const char *base_uri,
const char *id,
GError ** error)
{
RsvgHandle *handle;
GdkPixbuf *retval;
handle = rsvg_handle_new ();
if (!handle) {
g_set_error (error, rsvg_error_quark (), 0, _("Error creating SVG reader"));
return NULL;
}
rsvg_handle_set_size_callback (handle, _rsvg_size_callback, data, NULL);
rsvg_handle_set_base_uri (handle, base_uri);
if (!rsvg_handle_write (handle, buff, len, error)) {
g_object_unref (G_OBJECT (handle));
return NULL;
}
if (!rsvg_handle_close (handle, error)) {
g_object_unref (G_OBJECT (handle));
return NULL;
}
retval = rsvg_handle_get_pixbuf_sub (handle, id);
g_object_unref (G_OBJECT (handle));
return retval;
}
/* This function renders a pixbuf from an SVG file according to vals. */
static GdkPixbuf *
load_rsvg_pixbuf (const gchar *filename,
SvgLoadVals *vals,
GError **error)
{
GdkPixbuf *pixbuf = NULL;
RsvgHandle *handle;
GIOChannel *io;
gchar *uri;
GIOStatus status = G_IO_STATUS_NORMAL;
gboolean success = TRUE;
io = g_io_channel_new_file (filename, "r", error);
if (!io)
return NULL;
g_io_channel_set_encoding (io, NULL, NULL);
handle = rsvg_handle_new ();
rsvg_handle_set_dpi (handle, vals->resolution);
/* set the base URI so that librsvg can resolve relative paths */
uri = g_filename_to_uri (filename, NULL, NULL);
if (uri)
{
gchar *p = strrchr (uri, '/');
if (p)
*p = '\0';
rsvg_handle_set_base_uri (handle, uri);
g_free (uri);
}
rsvg_handle_set_size_callback (handle, load_set_size_callback, vals, NULL);
while (success && status != G_IO_STATUS_EOF)
{
gchar buf[8192];
gsize len;
status = g_io_channel_read_chars (io, buf, sizeof (buf), &len, error);
switch (status)
{
case G_IO_STATUS_ERROR:
success = FALSE;
break;
case G_IO_STATUS_EOF:
success = rsvg_handle_close (handle, error);
break;
case G_IO_STATUS_NORMAL:
success = rsvg_handle_write (handle,
(const guchar *) buf, len, error);
break;
case G_IO_STATUS_AGAIN:
break;
}
}
g_io_channel_unref (io);
if (success)
pixbuf = rsvg_handle_get_pixbuf (handle);
g_object_unref (handle);
return pixbuf;
}
static VALUE
rb_rsvg_handle_set_base_uri(VALUE self, VALUE base_uri)
{
rsvg_handle_set_base_uri(_SELF(self), RVAL2CSTR(base_uri));
return self;
}
