B öÀ„\Vã@sDdZddlZddlZdZdZe dd¡ZdZdZd d „Z d d „Z dS) zÀ sphinx.util.png ~~~~~~~~~~~~~~~ PNG image manipulation helpers. :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS. :license: BSD, see LICENSE for details. éNé éz!ié s tEXtDepths IEND®B`‚c Cs`t|dƒL}| tt d¡| t¡}| tt¡s:dSt  d|dd…¡dSWdQRXdS)zARead the special tEXt chunk indicating the depth from a PNG file.ÚrbéNz!iéér) ÚopenÚseekÚLEN_IENDÚ LEN_DEPTHÚreadÚ startswithÚDEPTH_CHUNK_LENÚDEPTH_CHUNK_STARTÚstructZunpack)ÚfilenameÚfZ depthchunk©rú.lib/python3.7/site-packages/sphinx/util/png.pyÚread_png_depths   rc Cstt d|¡}t|dƒT}| t d¡| tt|¡t  t|¡d@}| t d|¡¡| t ¡WdQRXdS)z‰Write the special tEXt chunk indicating the depth to a PNG file. The chunk is placed immediately before the special IEND chunk. z!izr+brlÿÿz!IN) rÚpackr r r ÚwriterrÚbinasciiZcrc32Ú IEND_CHUNK)rZdepthÚdatarZcrcrrrÚwrite_png_depth%s  r) Ú__doc__rrr r rrrrrrrrrrÚ s