[Gambas-user] How to reduce the size of PDFs generated with PDFSurface/Cairo

[Fabien Bodard]

Pdf size is a big deal fore too.

I will have a look

Le lun. 9 oct. 2023 à 10:10, BB <adamnt42 at gmail.com> a écrit :

>
> On 30/9/23 1:05 am, Claus Dietrich wrote:
>
> Hi
>
> I am using the Gambas PDFSurface and Cairo to generate and assemble
> multi-page PDFs.
>
> When I insert a jpg-image from my scanner (A4 size, 300dpi, 90% quality)
> with a size of 730 kB  the resulting single page PDF is blown up to a size
> of 2.8 MB. A stripped down demo project is attached:
>
> https://send.vis.ee/download/62247b9c0d0529a1/#JidKAJn64IdF4G1c-4B07A
>
> Does anyone know a way to obtain a PDF file with a similar size (resp.
> compression) like the source image by using native Gambas means (=without
> installing tools like ImageMagick)?
>
> Best regards
> Claus
>
>
> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>
> Hi Claus, I don't see that you ever got a reply on this, so just a bit of
> information from me on it. I don't know how you could reduce the size as
> from my "memory" pdf used to and maybe still does include all kinds of
> images as a dot-by-dot set of "portable" print instructions. That is for
> each image pixel it creates approximately 4 pdf (byte code) statements.
> Years ago I remember I had to tell the (ahem) "less experienced" graphics
> designers never to use any shade of yellow in their pictures as that blew
> the pdf size out by about 64 bytes per pixel i.e about 32 times the size of
> the image. So 4 times the original image size would be a "good outcome" in
> my opinion. As far as I know pdf still doesn't know fig-all about image
> formats.
>
> hth
>
> b
>
> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>
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