josch/img2pdf
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add options to specify pdf dimensions in points

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add options specify output pdf dimensions in points:  -x width;  -y height.
This commit is contained in:
xiota 2014-08-04 11:25:07 -04:00
parent f34ffb1f17
commit 9b35f5cf6b
1 changed files with 19 additions and 7 deletions
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26
src/img2pdf.py
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@ -117,7 +117,7 @@ class pdfdoc(object):
obj.identifier = newid obj.identifier = newid
self.objects.append(obj) self.objects.append(obj)
def addimage(self, color, width, height, dpi, imgformat, imgdata): def addimage(self, color, width, height, imgformat, imgdata, pdf_x, pdf_y):
if color == 'L': if color == 'L':
color = "/DeviceGray" color = "/DeviceGray"
elif color == 'RGB': elif color == 'RGB':
@ -126,9 +126,6 @@ class pdfdoc(object):
error_out("unsupported color space: %s"%color) error_out("unsupported color space: %s"%color)
exit(1) exit(1)
# pdf units = 1/72 inch
pdf_x, pdf_y = 72.0*width/dpi[0], 72.0*height/dpi[1]
if pdf_x < 3.00 or pdf_y < 3.00: if pdf_x < 3.00 or pdf_y < 3.00:
warning_out("pdf width or height is below 3.00 - decrease the dpi") warning_out("pdf width or height is below 3.00 - decrease the dpi")
@ -200,7 +197,7 @@ class pdfdoc(object):
result += "%%EOF\n" result += "%%EOF\n"
return result return result
def convert(images, dpi, title=None, author=None, creator=None, producer=None, def convert(images, dpi, pdf_x, pdf_y, title=None, author=None, creator=None, producer=None,
creationdate=None, moddate=None, subject=None, keywords=None, creationdate=None, moddate=None, subject=None, keywords=None,
colorspace=None, verbose=False): colorspace=None, verbose=False):
@ -270,7 +267,15 @@ def convert(images, dpi, title=None, author=None, creator=None, producer=None,
color = 'L' color = 'L'
imgdata = zlib.compress(imgdata.tostring()) imgdata = zlib.compress(imgdata.tostring())
pdf.addimage(color, width, height, ndpi, imgformat, imgdata) # pdf units = 1/72 inch
if not pdf_x and not pdf_y:
pdf_x, pdf_y = 72.0*width/ndpi[0], 72.0*height/ndpi[1]
elif not pdf_y:
pdf_y = pdf_x*height/width
elif not pdf_x:
pdf_x = pdf_y*width/height
pdf.addimage(color, width, height, imgformat, imgdata, pdf_x, pdf_y)
im.close() im.close()
@ -298,6 +303,12 @@ parser.add_argument(
parser.add_argument( parser.add_argument(
'-d', '--dpi', metavar='dpi', type=positive_float, '-d', '--dpi', metavar='dpi', type=positive_float,
help='dpi for pdf output (default: 96.0)') help='dpi for pdf output (default: 96.0)')
parser.add_argument(
'-x', metavar='pdf_x', type=positive_float,
help='output width in points')
parser.add_argument(
'-y', metavar='pdf_y', type=positive_float,
help='output height in points')
parser.add_argument( parser.add_argument(
'-t', '--title', metavar='title', type=str, '-t', '--title', metavar='title', type=str,
help='title for metadata') help='title for metadata')
@ -332,9 +343,10 @@ def main(args=None):
if args is None: if args is None:
args = sys.argv[1:] args = sys.argv[1:]
args = parser.parse_args(args) args = parser.parse_args(args)
args.output.write( args.output.write(
convert( convert(
args.images, args.dpi, args.title, args.author, args.images, args.dpi, args.x, args.y, args.title, args.author,
args.creator, args.producer, args.creationdate, args.moddate, args.creator, args.producer, args.creationdate, args.moddate,
args.subject, args.keywords, args.colorspace, args.verbose)) args.subject, args.keywords, args.colorspace, args.verbose))