Set escpos binary file encoding type in environment variable

[PratikBodawala]

#61

Setting the Environment variable "SOURCE_ENCODING" for other than CP437 encoding

[PratikBodawala]

Hello, @welcoMattic, @mike42
Could you review my PR and provide feedback?

[mike42]

Hi,

I've taken a look at the code. Can you share an example file which you're running this with, and the make/model of printer that you use?

I would be interested to know whether I can make an alternative solution work for your use case, by adjusting the current code page each time we encounter an ESC t (select code page) command in the file. A single file will often access characters from many different code pages, and this would be the correct way to handle that.

The default code page (encoding to assume if none is specified in the actual file) is another matter entirely, and an environment variable is certainly a good way to handle that.

[PratikBodawala]

With environment variable

Without environment variable

model: HOP-801

As I mentioned in issue #61, I need 1/4, 1/2, and 3/4. The default charset has 1/4 and 1/2. But not 3/4 so, I search for other encodings which are supported by this model, so, latin1 is supported and print just fine. but when I convert it to html it was decoding from wrong charset. Following file in latin1 charset.

test90.txt