Copyright (c) 2014-2015 Michael Billington ,
incorporating modifications by:
- Roni Saha
- Gergely Radics
- Warren Doyle
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
This class deals with images in raster formats, and converts them into formats
which are suitable for use on thermal receipt printers. Currently, only PNG
images (in) and ESC/POS raster format (out) are implemeted.
Input formats:
- Currently, only PNG is supported.
- Other easily read raster formats (jpg, gif) will be added at a later date, as this is not complex.
- The BMP format can be directly read by some commands, but this has not yet been implemented.
Output formats:
- Currently, only ESC/POS raster format is supported
- ESC/POS 'column format' support is partially implemented, but is not yet used by Escpos.php library.
- Output as multiple rows of column format image is not yet in the works.
Libraries:
- Currently, php-gd is used to read the input. Support for imagemagick where gd is not installed is
also not complex to add, and is a likely future feature.
- Support for native use of the BMP format is a goal, for maximum compatibility with target environments.