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clean up label output; ensure correct label size set in printer

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This commit is contained in:
James Wah 2021-07-02 20:04:26 +10:00
parent dafb07f11e
commit 20fd5642b0
1 changed files with 5 additions and 5 deletions
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10
hotprint.py
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@ -30,8 +30,11 @@ def convert_pdf_scaled(pdfname, max_width, max_height):
return im
def label_to_command(image, labelwidth=810, labelheight=1200):
def label_to_command(image, labelwidth_mm=100, labelheight_mm=150, dpi=203):
"Centre the image on the label and generate a print command"
labelwidth = labelwidth_mm / 25.4 * dpi
labelheight = labelheight_mm / 25.4 * dpi
assert im.size[0] <= labelwidth
assert im.size[1] <= labelheight
@ -39,10 +42,7 @@ def label_to_command(image, labelwidth=810, labelheight=1200):
paste_y = (labelheight - im.size[1]) // 2
row_bytes = (im.size[0] + 7) // 8
command = b"CLS\r\nBITMAP %d,%d,%d,%d,0," % (paste_x, paste_y, row_bytes, im.size[1])
label = Image.new('1', (labelwidth, labelheight))
label.paste(image, (paste_x, paste_y))
command = b"SIZE %d mm\r\nCLS\r\nBITMAP %d,%d,%d,%d,0," % (labelwidth_mm, paste_x, paste_y, row_bytes, im.size[1])
command += image.tobytes()
command += b"\r\nPRINT 1,1\r\n"
return command