Height of the image in pixels
less than 1 to disable length checks, otherwise GDK_PIXDATA_HEADER_LENGTH plus the 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