Height of the image in pixels.
less than 1 to disable length checks, otherwise #GDK_PIXDATA_HEADER_LENGTH + length of @pixel_data.
magic number. A valid #GdkPixdata structure must have #GDK_PIXBUF_MAGIC_NUMBER here.
information about colorspace, sample width and encoding, in a #GdkPixdataType.
@width x @height pixels, encoded according to @pixdata_type and @rowstride.
Distance in bytes between rows.
Width of the image in pixels.