Image helper

Module escpos.image

Image format handling class.

This module contains the image format handler EscposImage.

author:

Michael Billington

organization:

python-escpos

copyright:

Copyright (c) 2016 Michael Billington <michael.billington@gmail.com>

license:

MIT

class escpos.image.EscposImage(img_source)

Bases: object

Load images in, and output ESC/POS formats.

The class is designed to efficiently delegate image processing to PIL, rather than spend CPU cycles looping over pixels.

property width

Return width of image in pixels.

property width_bytes

Return width of image if you use 8 pixels per byte and 0-pad at the end.

property height

Height of image in pixels.

to_column_format(high_density_vertical=True)

Extract slices of an image as equal-sized blobs of column-format data.

Parameters:

high_density_vertical – Printed line height in dots

to_raster_format()

Convert image to raster-format binary.

split(fragment_height)

Split an image into multiple fragments after fragment_height pixels.

Parameters:

fragment_height – height of fragment

Returns:

list of PIL objects

center(max_width)

Center image in place.

Param:

Maximum width in order to deduce x offset for centering

Returns:

None