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The :py:func:`register` function is used to register additional viewers.
:param viewer: The viewer to be registered.
:param order:
Zero or a negative integer to prepend this viewer to the list,
a positive integer to append it.
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Display a given image.
:param image: An image object.
:param title: Optional title. Not all viewers can display the title.
:param \**options: Additional viewer options.
:returns: ``True`` if a suitable viewer was found, ``False`` otherwise.
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d� Z dS )r zBase class for viewers.c K sP |j dv s>| jdkr |j dv s>t�|j �}|j |kr>|�|�}| j|fi |��S )z�
The main function for displaying an image.
Converts the given image to the target format and displays it.
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z Viewer.showNc C s | j S )z3Return format name, or ``None`` to save as PGM/PPM.)r �r r r r r �
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Returns the command used to display the file.
Not implemented in the base class.
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save_imaged s zViewer.save_imagec K s | j | �|�fi |��S )zDisplay the given image.)� show_filer" �r r r r r r r h s zViewer.show_imagec K s t �| j|fi |��� dS )zDisplay the given file.r )�os�systemr! r r r r r# l s zViewer.show_file) �__name__�
__module__� __qualname__�__doc__r r r r r! r" r r# r r r r r = s r c @ s$ e Zd ZdZdZddiZdd� ZdS )�
WindowsViewerzNThe default viewer on Windows is the default system application for PNG files.r �compress_levelr c K s d|� d|� d�S )Nzstart "Pillow" /WAIT "z)" && ping -n 2 127.0.0.1 >NUL && del /f "�"r r r r r r! { s ��zWindowsViewer.get_commandN)r' r( r) r* r r r! r r r r r+ u s r+ �win32c @ s, e Zd ZdZdZddiZdd� Zdd� Zd S )
� MacViewerz2The default viewer on macOS using ``Preview.app``.r r, r c K s( d}d|� dt |�� dt |�� d�}|S )Nzopen -a Preview.app�(� z; sleep 20; rm -f �)&r �r r r �commandr r r r! � s zMacViewer.get_commandc K s� t �� \}}t�|d��}|�|� W d � n1 s80 Y t|��"}tjdgd|d� W d � n1 sr0 Y t�|� dS )�Display given file�wNz7im=$(cat); open -a Preview.app $im; sleep 20; rm -f $imT��shell�stdinr ) �tempfile�mkstempr% �fdopen�write�open�
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UnixViewerr r, r c K s6 | j |fi |��d }d|� dt|�� dt|�� d�S )Nr r0 r1 z; rm -f r2 )�get_command_exr r3 r r r r! � s zUnixViewer.get_commandc K s� t �� \}}t�|d��}|�|� W d � n1 s80 Y t|��@}| j|fi |��d }tjd| d gd|d� W d � n1 s�0 Y t� |� dS ) r5 r6 Nr z
im=$(cat);z $im; rm -f $imTr7 r )
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zUnixViewer.show_fileN)r' r( r) r r r! r# r r r r rF � s rF c @ s e Zd ZdZdd� ZdS )�
DisplayViewerz$The ImageMagick ``display`` command.c K s d }}||fS )N�displayr )r r r r4 �
executabler r r rG � s z DisplayViewer.get_command_exN�r' r( r) r* rG r r r r rH � s rH c @ s e Zd ZdZdd� ZdS )�GmDisplayViewerz*The GraphicsMagick ``gm display`` command.c K s d}d}||fS )N�gmz
gm displayr �r r r rJ r4 r r r rG � s z GmDisplayViewer.get_command_exNrK r r r r rL � s rL c @ s e Zd ZdZdd� ZdS )� EogViewerz'The GNOME Image Viewer ``eog`` command.c K s d}d}||fS )N�eogzeog -nr rN r r r rG � s zEogViewer.get_command_exNrK r r r r rO � s rO c @ s e Zd ZdZddd�ZdS )�XVViewerzX
The X Viewer ``xv`` command.
This viewer supports the ``title`` parameter.
Nc K s& d }}|r |dt |�� �7 }||fS )N�xvz -name r )r r r r r4 rJ r r r rG � s zXVViewer.get_command_ex)NrK r r r r rQ � s rQ )r. rE rI rM rP rR c @ s e Zd ZdZdd� ZdS )�
IPythonViewerz!The viewer for IPython frontends.c K s t |� dS )Nr )�ipython_displayr$ r r r r � s zIPythonViewer.show_imageN)r' r( r) r* r r r r r rS � s rS )rI �__main__� z.Syntax: python3 ImageShow.py imagefile [title])r )N)"r% �shutilr? �sysr: Zshlexr ZPILr r r r r r+ �platformr/ rF rH rL rO rQ �whichrS ZIPython.displayrI rT � ImportErrorr' �len�argv�print�exitr> Zimr r r r �<module> sT
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