[reportlab-users] Optimizing greyscale and bilevel images

[Jesus Cea]

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Checking pdfgen/pdfimages.py, grayscale JPEG files are detected and
used, but any other imagefile is converted to RGB.

I have bilevel PNG files that when printed as PDF using reportlab are
expanded THREE times.

Seems quite trivial to detect "1", "L" and indexed files in PIL
images, and generate optimized representation. Supporting "1" or "L"
natively seems to be 5 lines of code or less.

Are you interested in a patch?.

Grayscale seems trivial. Bilevel seems easy. Indexed... I am not
familiar with PDF format, and reading the spec it is not very clear to
me how to do it, beside the ability of PDF supporting this.

PS: I am using ReportLab 2.4.

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