[reportlab-users] Image sizes

Yan Seiner yan at seiner.com
Sat Nov 30 19:08:44 EST 2013

Oh I understand...

I'm trying to figure out where the disconnect is... Something between
mediawiki and the final pdf resets some images to a fixed size - but not
others, and there doesn't seem to be any pattern to it.

I think it's mwlib that's the issue...

I was hoping that someone on this list has some experience with
generating pdfs from mediawiki.


On 11/30/2013 03:02 PM, Andy Robinson wrote:

> I'm really sorry, but ReportLab's staff can only comment on the

> reportlab library, and not the mediawiki code. None of our staff at

> ReportLab actually know the code which converts wiki pages into

> Reportab's object model.


> When creating a PDF, you have full control of the size of the image in

> points; and however many pixels there are, they get stretched and

> squeezed to the size you give. There is no magic sizing in our

> framework.


> I'm hoping someone who has worked on the mediawiki code can comment...


> - Andy



> On 30 November 2013 21:47, Yan Seiner <yan at seiner.com> wrote:

>> Can someone give me some clues on how image sizing works in reportlab?


>> I am trying to print 3 images across a page from mediawiki.


>> What I am getting are very small images in the pdf generated by reportlab,

>> eventhough the images in mediawiki are full-size.


>> I've tried tweaking these:


>> img_default_thumb_width = 675

>> img_max_thumb_width = 1.0 # fraction of print width for floated images

>> img_max_thumb_height = 1.0

>> img_min_res = 75

>> img_inline_scale_factor = 1.0 # factor by which inline images are scaled.

>> print_width_px = 675 # 540px are assumed to be the equivalent for a full

>> print width


>> but at some point I hit a max size of image, and the images in my pdf

>> document are only 1/4 page wide, instead of the 1/3 or 1/2 page that I need.


>> I don't really know what the above constants control and how they're

>> supposed to work.

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