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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$   e Zd ZdZdZdd Zdd ZdS )DdsImageFileZDDSzDirectDraw Surfacec                 C   s"  t | jdstdtd| jd\}|dkr$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$}n|d%krd&| _d'}n|d(krd)| _d*}d| _n|d+krx|d,7 }td| jd\}| jd |ttfv r'd-| _d*}d| _nZ|tkr5d)| _d*}d| _nL|ttfv rBd.| _d/}n?|tkrRd.| _d0| jd1< d/}n/|tttfv rqdd| j dd2fg| _|tkrod0| jd1< d S td3| td4t| d5d| j ||| jffg| _d S )6Nr   znot a DDS filez<I|   zUnsupported header size x   zIncomplete header: z bytesz<3I   RGBAz<11I,   z<2Ir	   z<4I   c                 S   s   i | ]\}}|g d | qS ))RGBA ).0imaskr    r    Z/var/www/html/magazine_api/magazine_env/lib/python3.10/site-packages/PIL/DdsImagePlugin.py
<dictcomp>   s    z&DdsImageFile._open.<locals>.<dictcomp> r
         ~ RGB         rawr   r   r   r   s   DXT1ZDXT1s   DXT3ZDXT3r   s   DXT5ZDXT5   s   BC5SZBC5S   s   DX10   ZBC5ZBC7   g]tE?gamma)r   r   r   zUnimplemented DXGI format zUnimplemented pixel format Zbcn)_acceptfpreadSyntaxErrorstructunpackOSErrorreprlenr   _sizemodeDDPF_RGB	enumeratesizeZtileZpixel_formatDXGI_FORMAT_BC5_TYPELESSDXGI_FORMAT_BC5_UNORMDXGI_FORMAT_BC5_SNORMDXGI_FORMAT_BC7_TYPELESSDXGI_FORMAT_BC7_UNORMDXGI_FORMAT_BC7_UNORM_SRGBinfoDXGI_FORMAT_R8G8B8A8_TYPELESSDXGI_FORMAT_R8G8B8A8_UNORMDXGI_FORMAT_R8G8B8A8_UNORM_SRGBNotImplementedError)selfheader_sizeheader_bytesheaderflagsheightwidthZpitchdepthZmipmapsZpfsizeZpfflagsZfourccZbitcountZmasksrawmodeZ
data_startnZdxgi_formatr    r    r$   _openq   s   

*






zDdsImageFile._openc                 C   s   d S )Nr    )rM   posr    r    r$   	load_seek   s   zDdsImageFile.load_seekN)__name__
__module____qualname__formatformat_descriptionrW   rY   r    r    r    r$   r   m   s
    Zr   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
      r2   r	   r      r)   r*   r+   r'   r,   r-   r.   r   )r>   r:   writeo32	DDS_MAGIC	DDSD_CAPSDDSD_HEIGHT
DDSD_WIDTH
DDSD_PITCHDDSD_PIXELFORMATrR   rS   DDS_RGBAr?   DDSCAPS_TEXTUREsplitr   merger   _saverA   )Zimr5   filenamergbar    r    r$   rm      sj   
"	


4rm   c                 C   s   | d d dkS )Nr   s   DDS r    )prefixr    r    r$   r4      s   r4   z.dds)N__doc__r8   ior   r&   r   r   _binaryr   rb   rc   rd   re   rf   rg   rh   ZDDSD_MIPMAPCOUNTZDDSD_LINEARSIZEZ
DDSD_DEPTHZDDSCAPS_COMPLEXrj   ZDDSCAPS_MIPMAPZDDSCAPS2_CUBEMAPZDDSCAPS2_CUBEMAP_POSITIVEXZDDSCAPS2_CUBEMAP_NEGATIVEXZDDSCAPS2_CUBEMAP_POSITIVEYZDDSCAPS2_CUBEMAP_NEGATIVEYZDDSCAPS2_CUBEMAP_POSITIVEZZDDSCAPS2_CUBEMAP_NEGATIVEZZDDSCAPS2_VOLUMEZDDPF_ALPHAPIXELSZ
DDPF_ALPHAZDDPF_FOURCCZDDPF_PALETTEINDEXED8r?   ZDDPF_LUMINANCEZ
DDS_FOURCCZDDS_RGBri   ZDDS_LUMINANCEZDDS_LUMINANCEAZ	DDS_ALPHAZDDS_PAL8ZDDS_HEADER_FLAGS_TEXTUREZDDS_HEADER_FLAGS_MIPMAPZDDS_HEADER_FLAGS_VOLUMEZDDS_HEADER_FLAGS_PITCHZDDS_HEADER_FLAGS_LINEARSIZEZ
DDS_HEIGHTZ	DDS_WIDTHZDDS_SURFACE_FLAGS_TEXTUREZDDS_SURFACE_FLAGS_MIPMAPZDDS_SURFACE_FLAGS_CUBEMAPZDDS_CUBEMAP_POSITIVEXZDDS_CUBEMAP_NEGATIVEXZDDS_CUBEMAP_POSITIVEYZDDS_CUBEMAP_NEGATIVEYZDDS_CUBEMAP_POSITIVEZZDDS_CUBEMAP_NEGATIVEZZDXT1_FOURCCZDXT3_FOURCCZDXT5_FOURCCrI   rJ   rK   rB   rC   rD   rE   rF   rG   r   rm   r4   Zregister_openr]   Zregister_saveZregister_extensionr    r    r    r$   <module>   s    b$