o
    Z#ûa  ã                   @   sˆ   d Z ddlmZmZmZmZ ddlmZ dZ	 dd„ Z	dd	„ Z
d
d„ Zdd„ Zdd„ Ze	e
eeegZ	 G dd„ dƒZG dd„ deƒZdS )z·
Stuff to translate curve segments to palette values (derived from
the corresponding code in GIMP, written by Federico Mena Quintero.
See the GIMP distribution for more information.)
é    )ÚlogÚpiÚsinÚsqrté   )Úo8g»½×Ùß|Û=c                 C   sL   || kr| t k r
dS d| |  S ||  }d|  } | t k rdS dd| |   S )Ng        ç      à?ç      ð?)ÚEPSILON©ÚmiddleÚpos© r   ú6/usr/lib/python3/dist-packages/PIL/GimpGradientFile.pyÚlinear   s   r   c                 C   s   |t dƒt t| tƒƒ  S )Nr   )r   Úmaxr
   r   r   r   r   Úcurved.   ó   r   c                 C   s$   t t d tt| |ƒ  ƒd d S )Ng       @r	   )r   r   r   r   r   r   r   Úsine2   s   $r   c                 C   s   t dt| |ƒd d  ƒS ©Nr	   é   ©r   r   r   r   r   r   Úsphere_increasing6   r   r   c                 C   s   dt dt| |ƒd  ƒ S r   r   r   r   r   r   Úsphere_decreasing:   r   r   c                   @   s   e Zd ZdZddd„ZdS )ÚGradientFileNé   c                 C   sp  g }d}| j | \}}}}}}	t|ƒD ]�}
|
|d  }||k r2|d7 }| j | \}}}}}}	||k s|| }|tk r@|	ddƒ}n|	|| | || | ƒ}ttd|d |d  | |d   d ƒƒ}ttd|d |d  | |d   d ƒƒ}ttd|d |d  | |d   d ƒƒ}ttd|d |d  | |d   d ƒƒ}| || | | ¡ qd |¡dfS )	Nr   r   r   éÿ   r   é   ó    ÚRGBA)ÚgradientÚranger
   r   ÚintÚappendÚjoin)ÚselfÚentriesÚpaletteÚixÚx0Úx1ÚxmÚrgb0Úrgb1ÚsegmentÚiÚxÚwÚscaleÚrÚgÚbÚar   r   r   Ú
getpaletteF   s&   þ,,,,zGradientFile.getpalette)r   )Ú__name__Ú
__module__Ú__qualname__r    r7   r   r   r   r   r   B   s    r   c                   @   s   e Zd ZdZdd„ ZdS )ÚGimpGradientFilez(File handler for GIMP's gradient format.c              	   C   sô   |  ¡ d d… dkrtdƒ‚|  ¡ }| d¡r|  ¡  ¡ }t|ƒ}g }t|ƒD ]M}|  ¡  ¡ }dd„ |d d… D ƒ}|d |d	 }}	|d
 }
|dd… }|dd… }tt|d ƒ }t|d ƒ}|dkritdƒ‚| 	||	|
|||f¡ q'|| _
d S )Né   s   GIMP Gradientznot a GIMP gradient files   Name: c                 S   s   g | ]}t |ƒ‘qS r   )Úfloat)Ú.0r0   r   r   r   Ú
<listcomp>}   s    z-GimpGradientFile.__init__.<locals>.<listcomp>é   r   r   r   r   é   é   zcannot handle HSV colour space)ÚreadlineÚSyntaxErrorÚ
startswithÚstripr"   r!   ÚsplitÚSEGMENTSÚOSErrorr#   r    )r%   ÚfpÚlineÚcountr    r/   Úsr1   r)   r*   r+   r,   r-   r.   Úcspacer   r   r   Ú__init__k   s(   

zGimpGradientFile.__init__N)r8   r9   r:   Ú__doc__rO   r   r   r   r   r;   h   s    r;   N)rP   Úmathr   r   r   r   Ú_binaryr   r
   r   r   r   r   r   rH   r   r;   r   r   r   r   Ú<module>   s   &