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From: Harald Oehlmann <wortkarg3@yahoo.com>
Newsgroups: comp.lang.tcl
Subject: Re: Tk 9: image -format svg -scaletowidth not working?
Date: Mon, 8 Jul 2024 14:27:54 +0200
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Am 08.07.2024 um 14:16 schrieb Ralf Fassel:
> * Mark Summerfield <mark@qtrac.eu>
> | It fails with this error:
>>
> | Error in startup script: unknown option "-scaletowidth"
> |     while executing
> | "image create photo -file $svg {*}$opt"
> |     (procedure "icon" line 3)
> |     invoked from within
> | "icon test.svg 24"
> |     invoked from within
> | "ttk::button .button -command {destroy .} -image [icon test.svg 24]"
> |     (file "./svgtest2.tcl" line 8)
>>
> | Can someone tell me what I'm doing wrong?
>>
> | I'm using Tcl/Tk 9.0b2 on Debian Linux.
> 
> The manpage says:
> 
>    Image formats may support sub-options, which are specified using
>    additional words in the value to the -format option.
> 
> This sounds to me as if you need to specify the additional options like
> -scaletowidth *with* the -format option, like so:
> 
>    -format [list svg -scaletowidth 24]
> 
> instead of
> 
>    -format svg -scaletowidth 24
> 
> R'

Mark,
sorry for the odd format. It is always bad, if internals expose on user 
level. This is an internal issue. There is only the "-format" string 
which is communicated to the image format driver. Instead of adding 
something like "driver options", this format string was extended to a list.
I would love to change this one day...

Thank you for your understanding,
Harald