B
    zb=                 @   sn  d Z ddlZddlZddlmZ ddlmZ ddlmZm	Z	 ddl
mZ G dd	 d	eZG d
d deZG dd deZdd Zdd Zd-ddZdd Zdd ZG dd deZdd ZG dd de	j	ZG dd  d e	jZG d!d" d"eZG d#d$ d$eZG d%d& d&e	jZd.d'd(Zeej ee e!ej d) e"d*e e"d+e e#ej e e$d,e dS )/a  
Blizzard Mipmap Format (.blp)
Jerome Leclanche <jerome@leclan.ch>

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/

BLP1 files, used mostly in Warcraft III, are not fully supported.
All types of BLP2 files used in World of Warcraft are supported.

The BLP file structure consists of a header, up to 16 mipmaps of the
texture

Texture sizes must be powers of two, though the two dimensions do
not have to be equal; 512x256 is valid, but 512x200 is not.
The first mipmap (mipmap #0) is the full size image; each subsequent
mipmap halves both dimensions. The final mipmap should be 1x1.

BLP files come in many different flavours:
* JPEG-compressed (type == 0) - only supported for BLP1.
* RAW images (type == 1, encoding == 1). Each mipmap is stored as an
  array of 8-bit values, one per pixel, left to right, top to bottom.
  Each value is an index to the palette.
* DXT-compressed (type == 1, encoding == 2):
- DXT1 compression is used if alpha_encoding == 0.
  - An additional alpha bit is used if alpha_depth == 1.
  - DXT3 compression is used if alpha_encoding == 1.
  - DXT5 compression is used if alpha_encoding == 7.
    N)IntEnum)BytesIO   )Image	ImageFile)	deprecatec               @   s   e Zd ZdZdS )Formatr   N)__name__
__module____qualname__JPEG r   r   1lib/python3.7/site-packages/PIL/BlpImagePlugin.pyr   )   s   r   c               @   s   e Zd ZdZdZdZdS )Encodingr         N)r	   r
   r   UNCOMPRESSEDDXTZUNCOMPRESSED_RAW_BGRAr   r   r   r   r   -   s   r   c               @   s   e Zd ZdZdZdZdS )AlphaEncodingr   r      N)r	   r
   r   DXT1DXT3DXT5r   r   r   r   r   3   s   r   c             C   s   xlt dtdtdi D ]T\}}| |r| t|d  } | |jkrt| |  d|j d|   ||  S qW t	dt d|  dd S )	NZBLP_FORMAT_ZBLP_ENCODING_ZBLP_ALPHA_ENCODING_
   .zmodule 'z' has no attribute '')
r   r   r   items
startswithlen__members__r   r	   AttributeError)nameenumprefixr   r   r   __getattr__9   s    

 r$   c             C   s*   | d? d@ d> | d? d@ d> | d@ d> fS )N      r      ?   r   r   )ir   r   r   
unpack_565G   s    r*   Fc          	   C   s  t | d }t t t t f}xt|D ]}|d }td| |\}}}t|\}	}
}t|\}}}x`tdD ]R}xJtdD ]<}|d@ }|d? }d}|dkr|	|
|  }}}n|dkr|||  }}}n|dkrB||krd|	 | d }d|
 | d }d| | d }n$|	| d }|
| d }|| d }nR|dkr||krd| |	 d }d| |
 d }d| | d }nd	\}}}}|r|| ||||g q|| |||g qW qvW q,W |S )
zE
    input: one "row" of data (i.e. will produce 4*width pixels)
       z<HHI   r   r      r   r   )r   r   r   r   )r   	bytearrayrangestructunpack_fromr*   extend)dataalphablocksretblockidxcolor0color1bitsr0g0b0r1g1b1jr)   Zcontrolargbr   r   r   decode_dxt1K   sD    



 rG   c          	   C   s  t | d }t t t t f}xt|D ]}|d }| ||d  }td|}td|d\}}td|d\}t|\}	}
}t|\}}}xFtdD ]8}d}x,tdD ]}d| | d	 }|| }|rd}|dL }nd
}|dM }|d9 }|d	d| |  ? d@ }|dkr.|	|
|  }}}n|dkrJ|||  }}}nv|d	krd	|	 | d }d	|
 | d }d	| | d }n:|dkrd	| |	 d }d	| |
 d }d	| | d }|| ||||g qW qW q,W |S )zE
    input: one "row" of data (i.e. will produce 4*width pixels)
       z<8Bz<HHr+   z<I   r,   Fr   T      r   r   r   )r   r.   r/   r0   r1   r*   r2   )r3   r5   r6   r7   r8   r;   r9   r:   coder<   r=   r>   r?   r@   rA   rB   Zhighr)   alphacode_indexrC   
color_coderD   rE   rF   r   r   r   decode_dxt3   sH    




"rO   c          	   C   s  t | d }t t t t f}xt|D ]}|d }| ||d  }td|\}}td|d}|d |d d> B |d d> B |d d	> B }|d
 |d d> B }	td|d\}
}td|d\}t|
\}}}t|\}}}xtdD ]}xtdD ]}dd| |  }|dkr2|	|? d@ }n0|dkrR|	d? |d> d@ B }n||d ? d@ }|d
krr|}nt|dkr|}nd||krd| | |d |  d }n<|dkrd
}n,|dkrd}nd| | |d |  d }|dd| |  ? d@ }|d
kr|||  }}}n|dkr6|||  }}}nv|dkrrd| | d }d| | d }d| | d }n:|dkrd| | d }d| | d }d| | d }|| ||||g qW qW q,W |S )zG
    input: one "row" of data (i.e. will produce 4 * width pixels)
    rH   z<BBz<6Br   r   r+   r,   r'      r   r   z<HHz<IrI   r   rJ      r-   )r   r.   r/   r0   r1   r*   r2   )r3   r5   r6   r7   r8   Za0Za1r;   Z
alphacode1Z
alphacode2r9   r:   rL   r<   r=   r>   r?   r@   rA   rB   r)   rM   Z	alphacoderC   rN   rD   rE   rF   r   r   r   decode_dxt5   s^    ,










$rR   c               @   s   e Zd ZdS )BLPFormatErrorN)r	   r
   r   r   r   r   r   rS      s   rS   c             C   s   | d d dkS )Nr,   )s   BLP1s   BLP2r   )r#   r   r   r   _accept  s    rT   c               @   s    e Zd ZdZdZdZdd ZdS )BlpImageFilez 
    Blizzard Mipmap Format
    BLPzBlizzard Mipmap Formatc             C   s   | j d| _| j dtj td| j d\| _| j dtj td| j d| _	| jdkrr| j
 }ntd	t| j | jrd
nd| _|d| j d| jddffg| _d S )Nr,   r'   z<br   r   z<IIr+   )s   BLP1s   BLP2zBad BLP magic RGBARGB)r   r   r   )fpreadmagicseekosSEEK_CURr0   unpack_blp_alpha_depthZ_sizedecoderS   reprmodesizetile)selfdecoderr   r   r   _open  s    
zBlpImageFile._openN)r	   r
   r   __doc__formatZformat_descriptionrh   r   r   r   r   rU     s   rU   c               @   s8   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d ZdS )_BLPBaseDecoderTc          
   C   sH   y|    |   W n. tjk
rB } ztd|W d d }~X Y nX dS )NzTruncated BLP file)r   )_read_blp_header_loadr0   errorOSError)rf   bufferer   r   r   ra   "  s    z_BLPBaseDecoder.decodec             C   s   | j d td| d\| _td| d\| _td| d\| _td| d\| _| j dt	j
 td| d| _t| trtd| d\| _| j dt	j
 td| d| _td| d| _d S )	Nr,   z<iz<br   z<IIr+   z<16I@   )fdr\   r0   r_   
_safe_read_blp_compression_blp_encodingr`   _blp_alpha_encodingr]   r^   rd   
isinstanceBLP1Decoder_blp_offsets_blp_lengths)rf   r   r   r   rm   *  s    
z _BLPBaseDecoder._read_blp_headerc             C   s   t | j|S )N)r   ru   rt   )rf   lengthr   r   r   ru   =  s    z_BLPBaseDecoder._safe_readc          	   C   sd   g }xZt dD ]N}ytd| d\}}}}W n tjk
rH   P Y nX |||||f qW |S )N   z<4Br,   )r/   r0   r_   ru   ro   append)rf   r6   r)   rF   rE   rD   rC   r   r   r   _read_palette@  s    z_BLPBaseDecoder._read_palettec       
      C   s   t  }t| | jd }xjytd|d\}W n tjk
rL   P Y nX || \}}}}|||f}	| jrx|	|f7 }	|	|	 qW |S )Nr   z<Br   )
r.   r   ru   r|   r0   r_   rZ   ro   r`   r2   )
rf   paletter3   _dataoffsetrF   rE   rD   rC   dr   r   r   
_read_bgraJ  s    

z_BLPBaseDecoder._read_bgraN)	r	   r
   r   Z	_pulls_fdra   rm   ru   r   r   r   r   r   r   rk     s   
rk   c               @   s   e Zd Zdd Zdd ZdS )rz   c             C   sz   | j tjkr|   n`| j dkrb| jdkrL|  }| |}| t| qvt	dt
| j nt	dt
| j d S )Nr   )r,   r'   zUnsupported BLP encoding zUnsupported BLP compression )rv   r   r   _decode_jpeg_streamrw   r   r   
set_as_rawbytesrS   rb   )rf   r   r3   r   r   r   rn   [  s    



zBLP1Decoder._loadc             C   s   ddl m} td| d\}| |}| | jd | j   | | jd }|| }t	|}||}t
|j d|_dd| j dd	fg|_| |  d S )
Nr   )JpegImageFilez<Ir,   r   rX   Zjpeg)r   r   )ZBGRX )ZJpegImagePluginr   r0   r_   ru   r{   rt   tellr|   r   r   Z_decompression_bomb_checkrd   rc   re   r   tobytes)rf   r   Zjpeg_header_sizeZjpeg_headerr3   Zimager   r   r   r   m  s    
zBLP1Decoder._decode_jpeg_streamN)r	   r
   r   rn   r   r   r   r   r   rz   Z  s   rz   c               @   s   e Zd Zdd ZdS )BLP2Decoderc             C   s  |   }| j| jd  | jdkr| jtjkr@| |}q| jtj	krt
 }| jtjkr| jd d d d }xHt| jd d d D ].}x(t| |t| jdD ]}||7 }qW qW n| jtjkr*| jd d d d }xt| jd d d D ]&}x t| |D ]}||7 }qW qW n~| jtjkr| jd d d d }xXt| jd d d D ](}x t| |D ]}||7 }qzW qfW ntdt| j ntd	t| j ntd
t| j | t| d S )Nr   r   r   r,   r+   )r4   rH   zUnsupported alpha encoding zUnknown BLP encoding zUnknown BLP compression )r   rt   r\   r{   rv   rw   r   r   r   r   r.   rx   r   r   rd   r/   rG   ru   boolr`   r   rO   r   rR   rS   rb   r   r   )rf   r   r3   ZlinesizeZybr   r   r   r   rn   ~  s:    zBLP2Decoder._loadN)r	   r
   r   rn   r   r   r   r   r   }  s   r   c               @   s    e Zd ZdZdd Zdd ZdS )
BLPEncoderTc          	   C   s^   d}| j dd}xFtdD ]:}||d |d d  \}}}}|td||||7 }qW |S )N    rW   r~   r,   r   z<4B)imZ
getpaletter/   r0   pack)rf   r3   r   r)   rD   rE   rF   rC   r   r   r   _write_palette  s     zBLPEncoder._write_palettec       	   
   C   s   |   }dt| }tjd|fd }| jj\}}|tjd|| fd 7 }||7 }x>t|D ]2}x,t|D ] }|td| j||f7 }qlW q^W t|d|fS )N   z<16I)r   r   r   r   r   r   r   r   r   r   r   r   r   r   r   z<Br   )r   r   r0   r   r   rd   r/   Zgetpixel)	rf   bufsizeZpalette_datar   r3   whyxr   r   r   encode  s    $zBLPEncoder.encodeN)r	   r
   r   Z
_pushes_fdr   r   r   r   r   r   r     s   r   c             C   s  | j dkrtd| jddkr&dnd}|| |tdd |td	tj |td	| j	j d
krtdnd |td	d |td	d |tjd| j
  |dkr|tdd |tdd t| |dd| j
 d| j fg d S )NPzUnsupported BLP image modeZblp_versionBLP1s   BLP1s   BLP2z<ir   z<brW   r   <IIr'   rV   )r   r   )r   )rc   
ValueErrorZencoderinfogetwriter0   r   r   r   r   rd   r   _save)r   rY   filenameZsave_allr[   r   r   r   r     s    

"r   z.blpr   ZBLP2rV   )F)F)%ri   r]   r0   r"   r   ior   r   r   r   Z
_deprecater   r   r   r   r$   r*   rG   rO   rR   NotImplementedErrorrS   rT   rU   Z	PyDecoderrk   rz   r   Z	PyEncoderr   r   Zregister_openrj   Zregister_extensionZregister_decoderZregister_saveZregister_encoderr   r   r   r   <module>   s8   
75F;#0
