C++ (Cpp) _gdk_pixbuf_scale_simple_safeの例

コード例 #1

ファイル: pixbuf-io.c プロジェクト: cristiklein/gthumb

GthImage *
gth_pixbuf_new_from_file (GInputStream  *istream,
			  GthFileData   *file_data,
			  int            requested_size,
			  int           *original_width,
			  int           *original_height,
			  gboolean      *loaded_original,
			  gboolean       scale_to_original,
			  GCancellable  *cancellable,
			  GError       **error)
{
	ScaleData        scale_data;
	GdkPixbufLoader *pixbuf_loader;
	GdkPixbuf       *pixbuf;
	GthImage        *image;
	gboolean         original_size_rotated = FALSE;

	if (original_width != NULL)
		*original_width = -1;
	if (original_height != NULL)
		*original_height = -1;

	scale_data.requested_size = requested_size;
	scale_data.original_width = -1;
	scale_data.original_height = -1;
	scale_data.loader_width = -1;
	scale_data.loader_height = -1;

	pixbuf_loader = gdk_pixbuf_loader_new ();
	g_signal_connect (pixbuf_loader,
			  "size-prepared",
			  G_CALLBACK (pixbuf_loader_size_prepared_cb),
			  &scale_data);
	pixbuf = load_from_stream (pixbuf_loader, istream, requested_size, cancellable, error);

	g_object_unref (pixbuf_loader);

	if ((pixbuf != NULL) && scale_to_original) {
		GdkPixbuf *tmp;

		tmp = _gdk_pixbuf_scale_simple_safe (pixbuf, scale_data.original_width, scale_data.original_height, GDK_INTERP_NEAREST);
		g_object_unref (pixbuf);
		pixbuf = tmp;
	}

	if ((original_width != NULL) && (original_height != NULL)) {
		if (file_data != NULL) {
			char *path;

			path = g_file_get_path (file_data->file);
			if (path != NULL) {
				gdk_pixbuf_get_file_info (path, &scale_data.original_width, &scale_data.original_height);
				original_size_rotated = TRUE;
				g_free (path);
			}
		}
	}

	if (pixbuf != NULL) {
		GdkPixbuf *rotated;

		rotated = gdk_pixbuf_apply_embedded_orientation (pixbuf);
		if (rotated != NULL) {
			if (! original_size_rotated) {
				/* swap width and height */
				int tmp = scale_data.original_width;
				scale_data.original_width = scale_data.original_height;
				scale_data.original_height =tmp;
			}

			g_object_unref (pixbuf);
			pixbuf = rotated;
		}
	}

	image = gth_image_new ();
	if (pixbuf != NULL) {
		cairo_surface_t          *surface;
		cairo_surface_metadata_t *metadata;

		surface = _cairo_image_surface_create_from_pixbuf (pixbuf);
		metadata = _cairo_image_surface_get_metadata (surface);
		metadata->original_width = scale_data.original_width;
		metadata->original_height = scale_data.original_height;
		metadata->has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
		gth_image_set_cairo_surface (image, surface);
	}

	if (original_width != NULL)
		*original_width = scale_data.original_width;
	if (original_height != NULL)
		*original_height = scale_data.original_height;
	if (loaded_original != NULL)
		*loaded_original = (pixbuf != NULL) && (scale_data.original_width == gdk_pixbuf_get_width (pixbuf)) && (scale_data.original_height == gdk_pixbuf_get_height (pixbuf));

	_g_object_unref (pixbuf);

	return image;
}

コード例 #2

ファイル: pixbuf-io.c プロジェクト: KapTmaN/gthumb

GthImage *
gth_pixbuf_new_from_file (GInputStream  *istream,
			  GthFileData   *file_data,
			  int            requested_size,
			  int           *original_width,
			  int           *original_height,
			  gboolean       scale_to_original,
			  GCancellable  *cancellable,
			  GError       **error)
{
	ScaleData        scale_data;
	GdkPixbufLoader *pixbuf_loader;
	GdkPixbuf       *pixbuf;
	GthImage        *image;

	if (original_width != NULL)
		*original_width = -1;
	if (original_height != NULL)
		*original_height = -1;

	scale_data.requested_size = requested_size;
	scale_data.original_width = -1;
	scale_data.original_height = -1;
	scale_data.loader_width = -1;
	scale_data.loader_height = -1;

	pixbuf_loader = gdk_pixbuf_loader_new ();
	g_signal_connect (pixbuf_loader,
			  "size-prepared",
			  G_CALLBACK (pixbuf_loader_size_prepared_cb),
			  &scale_data);
	pixbuf = load_from_stream (pixbuf_loader, istream, requested_size, cancellable, error);

	g_object_unref (pixbuf_loader);

	if ((pixbuf != NULL) && scale_to_original) {
		GdkPixbuf *tmp;

		tmp = _gdk_pixbuf_scale_simple_safe (pixbuf, scale_data.original_width, scale_data.original_height, GDK_INTERP_NEAREST);
		g_object_unref (pixbuf);
		pixbuf = tmp;
	}

	if (pixbuf != NULL) {
		GdkPixbuf *rotated;

		rotated = gdk_pixbuf_apply_embedded_orientation (pixbuf);
		if (rotated != NULL) {
			scale_data.original_width = gdk_pixbuf_get_width (rotated);
			scale_data.original_height = gdk_pixbuf_get_height (rotated);
			g_object_unref (pixbuf);
			pixbuf = rotated;
		}
	}

	image = gth_image_new_for_pixbuf (pixbuf);

	if (original_width != NULL)
		*original_width = scale_data.original_width;
	if (original_height != NULL)
		*original_height = scale_data.original_height;

	_g_object_unref (pixbuf);

	return image;
}