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A Pillow loader for .dds files (S3TC-compressed aka DXTC)
Jerome Leclanche <jerome@leclan.ch>

Documentation:
  https://web.archive.org/web/20170802060935/http://oss.sgi.com/projects/ogl-sample/registry/EXT/texture_compression_s3tc.txt

The contents of this file are hereby released in the public domain (CC0)
Full text of the CC0 license:
  https://creativecommons.org/publicdomain/zero/1.0/
    N)BytesIO   )Image	ImageFile)o32leiDDS          i   i   i   i   i  @ i   i   i   i    i @  i   i        @   iDXT1iDXT3iDXT5         R   S   T   _   `   a   b   c   c                   @   s$   e Zd ZdZdZdd Zdd ZdS )DdsImageFileDDSzDirectDraw Surfacec                 C   s  t | jdstdtd| jd\}|dkr$tdt| | j|d }t|dkr<tdt| dt	|}td	|d
\}}}||f| _
d| _td	|d
\}}}	td|d td|d\}
}|d}td|d\}td|d}|t@ rdd t|D }d}|dkr||d 7 }nd| _||d |d  |d  7 }dd| j d|d d d ddffg| _d S |d }d}|d krd!| _d}n|d"krd#| _d$}n|d%krd&| _d'}n|d(krd)| _d}d*| _n|d+krd,| _d-}d| _n|d.krd/| _d-}d| _n|d0kr|d17 }td| jd\}| jd |ttfv rCd,| _d-}d| _nv|tkrQd/| _d-}d| _nh|tkr_d2| _d3}d| _nZ|tkrmd4| _d3}d| _nL|ttfv rzd5| _d6}n?|tkrd5| _d7| jd8< d6}n/|tttfv rdd| j dd9fg| _|tkrd7| jd8< d S td:| td;t| d<d| j ||| jffg| _d S )=Nr   znot a DDS filez<I|   zUnsupported header size x   zIncomplete header: z bytesz<3I   RGBAz<11I,   z<2Ir	   z<4I   c                 S   s   i | ]\}}|g d | qS ))RGBA ).0imaskr#   r#   9/tmp/pip-target-vg8gfxp4/lib/python/PIL/DdsImagePlugin.py
<dictcomp>   s    z&DdsImageFile._open.<locals>.<dictcomp> r
         ~ RGB         rawr   r   r   r   s   DXT1DXT1s   DXT3DXT3r   s   DXT5DXT5   s   ATI1BC4Ls   ATI2BC5   s   BC5SBC5Ss   DX10   BC6H   BC6HSBC7   g]tE?gamma)r   r   r   zUnimplemented DXGI format zUnimplemented pixel format bcn)_acceptfpreadSyntaxErrorstructunpackOSErrorreprlenr   _sizemodeDDPF_RGB	enumeratesizetilepixel_formatDXGI_FORMAT_BC5_TYPELESSDXGI_FORMAT_BC5_UNORMDXGI_FORMAT_BC5_SNORMDXGI_FORMAT_BC6H_UF16DXGI_FORMAT_BC6H_SF16DXGI_FORMAT_BC7_TYPELESSDXGI_FORMAT_BC7_UNORMDXGI_FORMAT_BC7_UNORM_SRGBinfoDXGI_FORMAT_R8G8B8A8_TYPELESSDXGI_FORMAT_R8G8B8A8_UNORMDXGI_FORMAT_R8G8B8A8_UNORM_SRGBNotImplementedError)selfheader_sizeheader_bytesheaderflagsheightwidthpitchdepthmipmapspfsizepfflagsfourccbitcountmasksrawmode
data_startndxgi_formatr#   r#   r'   _opens   s   

*










zDdsImageFile._openc                 C   s   d S )Nr#   )r`   posr#   r#   r'   	load_seek   s   zDdsImageFile.load_seekN)__name__
__module____qualname__formatformat_descriptionrs   ru   r#   r#   r#   r'   r   o   s
    jr   c                 C   s  | j dvrtd| j  d|tttd tttB tB tB t	B  t| j
 t| j t| j| j dkr7dnd d d	  td
 td
 td
d  td t| j dkrYtnt td
 t| j dkrhdnd td td td t| j dkrdnd
 tt td
 td
 td
 td
  | j dkr|  \}}}}td||||f} t| |dd| j d
| j d d d d
dffg d S )N)r+   r   zcannot write mode z as DDSr   r   r
      r@   r	   r      r,   r-   r.   r*   r/   r0   r1   r   )rM   rI   writeo32	DDS_MAGIC	DDSD_CAPSDDSD_HEIGHT
DDSD_WIDTH
DDSD_PITCHDDSD_PIXELFORMATre   rf   DDS_RGBArN   DDSCAPS_TEXTUREsplitr   merger   _saverP   )imrD   filenamergbar#   r#   r'   r      sj   
"	


4r   c                 C   s   | d d dkS )Nr   s   DDS r#   )prefixr#   r#   r'   rC     s   rC   z.dds)P__doc__rG   ior   r)   r   r   _binaryr   r~   r   r   r   r   r   r   DDSD_MIPMAPCOUNTDDSD_LINEARSIZE
DDSD_DEPTHDDSCAPS_COMPLEXr   DDSCAPS_MIPMAPDDSCAPS2_CUBEMAPDDSCAPS2_CUBEMAP_POSITIVEXDDSCAPS2_CUBEMAP_NEGATIVEXDDSCAPS2_CUBEMAP_POSITIVEYDDSCAPS2_CUBEMAP_NEGATIVEYDDSCAPS2_CUBEMAP_POSITIVEZDDSCAPS2_CUBEMAP_NEGATIVEZDDSCAPS2_VOLUMEDDPF_ALPHAPIXELS
DDPF_ALPHADDPF_FOURCCDDPF_PALETTEINDEXED8rN   DDPF_LUMINANCE
DDS_FOURCCDDS_RGBr   DDS_LUMINANCEDDS_LUMINANCEA	DDS_ALPHADDS_PAL8DDS_HEADER_FLAGS_TEXTUREDDS_HEADER_FLAGS_MIPMAPDDS_HEADER_FLAGS_VOLUMEDDS_HEADER_FLAGS_PITCHDDS_HEADER_FLAGS_LINEARSIZE
DDS_HEIGHT	DDS_WIDTHDDS_SURFACE_FLAGS_TEXTUREDDS_SURFACE_FLAGS_MIPMAPDDS_SURFACE_FLAGS_CUBEMAPDDS_CUBEMAP_POSITIVEXDDS_CUBEMAP_NEGATIVEXDDS_CUBEMAP_POSITIVEYDDS_CUBEMAP_NEGATIVEYDDS_CUBEMAP_POSITIVEZDDS_CUBEMAP_NEGATIVEZDXT1_FOURCCDXT3_FOURCCDXT5_FOURCCr\   r]   r^   rS   rT   rU   rV   rW   rX   rY   rZ   r   r   rC   register_openry   register_saveregister_extensionr#   r#   r#   r'   <module>   s    r$