[reportlab-users] Loading transparent GIFs with shapes.Image

Marcel Tromp mtromp.docbook at gmail.com
Mon Nov 23 02:52:49 EST 2009

I modified my renderPDF drawImage function to use canvas.drawImage instead
of drawInlineImage and added a mask.

This is now providing me desired behaviour.

I did run into a weird Foxit rendering issue where 2 out of 18 GIFs would
render low quality on the screen when using drawImage, but would show up
perfectly fine when using drawInlineImage. Acroread would be fine in either

Is there any way to include prerendered PDF files using the graphics packag

On Thu, Nov 19, 2009 at 9:29 AM, Andy Robinson <andy at reportlab.com> wrote:

> 2009/11/18 Marcel Tromp <mtromp.docbook at gmail.com>:

> > What is the benefit to use canvas instead beyond the image rendering?


> We wrote the canvas first, which aims to expose all the main PDF features.


> A year or two later, our clients needed a charts library which could

> output charts as bitmaps, PDF and Postscript. reportlab/graphics can

> take the Drawings and write them onto our Canvas, or similar renderers

> for Postscript and bitmap formats. Transparency only recently came

> into the Canvas, but nobodyhas needed or asked for it in the charts

> library (and our customers really only use it for charts; nobody would

> want a transparent axis or data line as far as I can see...)


> There are probably many PDF features not implemented in

> reportlab/graphics and logically we ought to add it when it works in

> all backends, but we have not done so yet.


> I hope this makes it clearer....


> Best Regards,


> --

> Andy Robinson

> CEO/Chief Architect

> ReportLab Europe Ltd.

> Media House, 3 Palmerston Road, Wimbledon, London SW19 1PG, UK

> Tel +44-20-8545-1570

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