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type1_to_pdf.py
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type1_to_pdf.py
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# Author: Mateusz Jurczyk (mjurczyk@google.com)
#
# Copyright 2019 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import math
import os
import struct
import sys
from fontTools.t1Lib import T1Font
# Configuration constants.
GLYPHS_PER_SEGMENT = 50
def main(argv):
if len(argv) != 3:
print "Usage: %s <.pfb font file> <output .pdf path>" % argv[0]
sys.exit(1)
# Load the number of glyphs in the font.
font = T1Font(argv[1])
glyph_count = len(font.getGlyphSet())
print "Glyphs in font: %d" % glyph_count
# Craft the PDF header.
pdf_data = "%PDF-1.1\n"
pdf_data += "\n"
pdf_data += "1 0 obj\n"
pdf_data += "<< /Pages 2 0 R >>\n"
pdf_data += "endobj\n"
pdf_data += "\n"
pdf_data += "2 0 obj\n"
pdf_data += "<<\n"
pdf_data += " /Type /Pages\n"
pdf_data += " /Count 1\n"
pdf_data += " /Kids [ 3 0 R ]\n"
pdf_data += ">>\n"
pdf_data += "endobj\n"
pdf_data += "\n"
pdf_data += "3 0 obj\n"
pdf_data += "<<\n"
pdf_data += " /Type /Page\n"
pdf_data += " /MediaBox [0 0 612 792]\n"
pdf_data += " /Contents 5 0 R\n"
pdf_data += " /Parent 2 0 R\n"
pdf_data += " /Resources <<\n"
pdf_data += " /Font <<\n"
pdf_data += " /CustomFont <<\n"
pdf_data += " /Type /Font\n"
pdf_data += " /Subtype /Type0\n"
pdf_data += " /BaseFont /TestFont\n"
pdf_data += " /Encoding /Identity-H\n"
pdf_data += " /DescendantFonts [6 0 R]\n"
pdf_data += " >>\n"
pdf_data += " >>\n"
pdf_data += " >>\n"
pdf_data += ">>\n"
pdf_data += "endobj\n"
# Construct the font body object.
with open(argv[1], "rb") as f:
font_data = f.read()
pdf_data += "4 0 obj\n"
pdf_data += "<</Subtype /Type1/Length %d>>stream\n" % len(font_data)
pdf_data += font_data
pdf_data += "\nendstream\n"
pdf_data += "endobj\n"
# Construct the page contents object.
pdf_data += "5 0 obj\n"
pdf_data += "<< >>\n"
pdf_data += "stream\n"
pdf_data += "BT\n"
segment_count = int(math.ceil(float(glyph_count) / GLYPHS_PER_SEGMENT))
for i in xrange(segment_count):
pdf_data += " /CustomFont 12 Tf\n"
if i == 0:
pdf_data += " 10 780 Td\n"
else:
pdf_data += " 0 -10 Td\n"
pdf_data += " <%s> Tj\n" % "".join(map(lambda x: struct.pack(">H", x), (x for x in xrange(i * GLYPHS_PER_SEGMENT, (i + 1) * GLYPHS_PER_SEGMENT)))).encode("hex")
pdf_data += "ET\n"
pdf_data += "endstream\n"
pdf_data += "endobj\n"
# Construct the descendant font object.
pdf_data += "6 0 obj\n"
pdf_data += "<<\n"
pdf_data += " /FontDescriptor <<\n"
pdf_data += " /Type /FontDescriptor\n"
pdf_data += " /FontName /TestFont\n"
pdf_data += " /Flags 5\n"
pdf_data += " /FontBBox[0 0 10 10]\n"
pdf_data += " /FontFile3 4 0 R\n"
pdf_data += " >>\n"
pdf_data += " /Type /Font\n"
pdf_data += " /Subtype /Type1\n"
pdf_data += " /BaseFont /TestFont\n"
pdf_data += ">>\n"
pdf_data += "endobj\n"
# Construct the trailer.
pdf_data += "trailer\n"
pdf_data += "<<\n"
pdf_data += " /Root 1 0 R\n"
pdf_data += ">>\n"
# Write the output to disk.
with open(argv[2], "w+b") as f:
f.write(pdf_data)
if __name__ == "__main__":
main(sys.argv)