如何将单色图像转换为热敏打印机的位格式 [英] How to convert monochrome image to bitwise format for thermal printer

问题描述

I'm using a Custom s'print DPT100-S thermal printer to made a receipt printing application.

It is able to print graphics using 384 pixels in one line. This data has to be passed on to the printer using 48 bytes (48x8=384). So, each 'bit' represents one dot to be printed (bit will be '0' for white and '1' for black).

So, I need to create a program which will read a monochrome BMP generated in Windows Paint(or any other program) and convert it into this bit format using a C program in Linux.

Please guide me.

解决方案

Pseudo code:

Read BMP
For each row in BMP
    For each group of 8 pixels in row
        output_byte = 0
        For each pixel in current group of 8
            output_byte <<= 1             // shift output_byte left by one bit
            output_byte |= (pixel != 0)   // set rightmost bit in output_byte
                                          // according to input pixel value
        Save output_byte in bitmap

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