3 U @s8dZddlZddlmZddlmZddlmZddlmZm Z m Z m Z ddl m Z ydd lmZWn ek rdd lmZYnXd gZeed d ZeeddZeeddZyeedddZWnek rdZYnXejGdddeZddZGdddeZddZdd Z ddZ!d d!Z"d"d#Z#dS)$z cairocffi.pixbuf ~~~~~~~~~~~~~~~~ Loading various image formats with GDK-PixBuf :copyright: Copyright 2013 by Simon Sapin :license: BSD, see LICENSE for details. N)BytesIO)partial)array)dlopen ImageSurfaceContext constants)xrange)ffi) ffi_pixbufdecode_to_image_surfacezgdk_pixbuf-2.0zgdk_pixbuf-2.0-0z gobject-2.0z gobject-2.0-0zglib-2.0z glib-2.0-0zgdk-3z gdk-x11-2.0zgdk-win32-2.0-0c@seZdZdZdS)ImageLoadingErrorz`PixBuf returned an error when loading an image. The image data is probably corrupted. N)__name__ __module__ __qualname____doc__rrP/var/www/html/enquirykeeper_venv/lib/python3.6/site-packages/cairocffi/pixbuf.pyr(srcCsh|d}t||tjkkst|tjkrd|jtjkrNdtj|jjdd}nd}tj|t |dS)z`Convert a :c:type:`GError**` to a Python :exception:`ImageLoadingError`, and raise it. rzPixbuf error: utf8replacez Pixbuf errorN) boolr NULLAssertionErrormessagestringdecodeglibZ g_error_freer)errorZ return_valuerrrrhandle_g_error0s   rc@s eZdZdZddZddZdS)Pixbufz8Wrap a :c:type:`GdkPixbuf` pointer and simulate methods.cCstj|tj|tj|_dS)N)gobjectZ g_object_refr gcg_object_unref_pointer)selfpointerrrr__init__Cs zPixbuf.__init__cCsttd|}t||jS)NZ gdk_pixbuf_)getattr gdk_pixbufrr$)r%namefunctionrrr __getattr__GszPixbuf.__getattr__N)rrrrr'r,rrrrr Asr cCstjtjtj}tjd}t|tj|tjd|t ||t|tj ||tj |}|tj krztj tj|jdnd}tj|}|tj krtdt||fS)ahDecode an image from memory with GDK-PixBuf. The file format is detected automatically. :param image_data: A byte string :returns: A tuple of a new :class:`PixBuf` object and the name of the detected image format. :raises: :exc:`ImageLoadingError` if the image data is invalid or in an unsupported format. z GError **zguchar[]asciiNz*Not enough image data (got a NULL pixbuf.))r r"r)Zgdk_pixbuf_loader_newr!r#newrZgdk_pixbuf_loader_writelenZgdk_pixbuf_loader_closeZgdk_pixbuf_loader_get_formatrrZgdk_pixbuf_format_get_namerZgdk_pixbuf_loader_get_pixbufrr ) image_dataloaderrZformat_ format_namepixbufrrrdecode_to_pixbufLs   $  r4cCs<t|\}}tdk rt|n|js,t|nt|}||fS)a~Decode an image from memory into a cairo surface. The file format is detected automatically. :param image_data: A byte string :returns: A tuple of a new :class:`~cairocffi.ImageSurface` object and the name of the detected image format. :raises: :exc:`ImageLoadingError` if the image data is invalid or in an unsupported format. N)r4gdkpixbuf_to_cairo_gdkZ get_has_alphapixbuf_to_cairo_slicespixbuf_to_cairo_png)r0r3r2Zsurfacerrrr ls cCs2tttjdd}tj|j|jdd|jjS)zrConvert from PixBuf to ImageSurface, using GDK. This method is fastest but GDK is not always available. rr) rrr FORMAT_ARGB32r5Zgdk_cairo_set_source_pixbufr$ get_sourceZ get_surface)r3Z dummy_contextrrrr6sr6cCs|jtjkst|jdks"t|jdks2t|j}|j}|j}t j |j |j }|dd}t jtj|}t||}tjdk}|d}|d} d|} xt|D]} || } | |} || | d}|| d| d}|| d| d}|| } | | } |rR| || | d<||| d| d<||| d| d<||| d| d<q| || d| d<||| d| d<||| d| d<||| | d<qWtd |}t tj||||S) zConvert from PixBuf to ImageSurface, using slice-based byte swapping. This method is 2~5x slower than GDK but does not support an alpha channel. (cairo uses pre-multiplied alpha, but not Pixbuf.) NbigrB)Zget_colorspacer)ZGDK_COLORSPACE_RGBrZget_n_channelsZget_bits_per_sampleZ get_widthZ get_heightZ get_rowstrider bufferZ get_pixelsZget_byte_lengthrZformat_stride_for_widthr FORMAT_RGB24 bytearraysys byteorderr r)r3widthheightZ rowstrideZpixelsZ cairo_stridedataZ big_endianZpixbuf_row_lengthZcairo_row_lengthalphayoffsetendZredZgreenZbluerrrr7sF     r7c Csvtjd}tjd}tjd}t||j||tjdd|tjddtjddtjtj|d|d}tjt|S) zConvert from PixBuf to ImageSurface, by going through the PNG format. This method is 10~30x slower than GDK but always works. zgchar **zgsize *z GError **zchar[]spngs compression0r) r r.rZsave_to_bufferrrBrZcreate_from_pngr)r3Zbuffer_pointer buffer_sizerZ png_bytesrrrr8s    r8)$rrEior functoolsrrrrrr compatr Z _ffi_pixbufr ImportErrorZ ffi_buildr __all__r)r!rr5OSErrorZ g_type_init ValueErrorrrobjectr r4r r6r7r8rrrr s6           2