Sigil 1.0.0 and cover-image

z537815 · 01-30-2020, 10:54 AM

Greetings.

I've noticed that with most - if not all - ebooks the cover is specified simply as an <img src="..."/>. So far, so good.

But if I do Tools > Add Cover, the new one gets specified as <svg ><image ... /></svg>.

Why? The cover-image is just that: a JPEG-file. Why the "sudden" switch to vector graphics? What am I missing here?

jhowell · 01-30-2020, 11:14 AM

The SVG wrapper is used because SVG supports the ability to scale an image to fit a screen having any aspect ratio as fully as possible without distortion. The HTML img element lacks this capability.

Tex2002ans · 01-30-2020, 11:29 AM

See this thread from 2018:

SVG Images - Why?

In my Post #11, I show examples of what can happen without the SVG wrapper. (Images can get heavily distorted/cropped.)

DiapDealer · 01-30-2020, 12:44 PM

You keep mentioning Sigil 1.0.0 in regards to things that have been a part of Sigil for many years. It's fine; it's just that I keep seeing the headlines and thinking there's some new issue that 1.0.0 has introduced (and panicking just a bit to be honest

).

Is 1.0.0 the first version of Sigil you've used, or are you coming from an ancient version that didn't have many of these features?

Notjohn · 01-30-2020, 04:46 PM

Quote:

Originally Posted by jhowell

The SVG wrapper is used because SVG supports the ability to scale an image to fit a screen having any aspect ratio as fully as possible without distortion. The HTML img element lacks this capability.

Thank you! I've never understood the point of SVG, and you have distilled it in two short sentences.

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01-30-2020, 10:54 AM	#1
z537815 Enthusiast Posts: 27 Karma: 10 Join Date: Aug 2019 Device: Lenovo TB-X704F	Sigil 1.0.0 and cover-image Greetings. I've noticed that with most - if not all - ebooks the cover is specified simply as an <img src="..."/>. So far, so good. But if I do Tools > Add Cover, the new one gets specified as <svg ><image ... /></svg>. Why? The cover-image is just that: a JPEG-file. Why the "sudden" switch to vector graphics? What am I missing here?

01-30-2020, 11:14 AM	#2
jhowell Grand Sorcerer Posts: 6,496 Karma: 84420419 Join Date: Nov 2011 Location: Tampa Bay, Florida Device: Kindles	The SVG wrapper is used because SVG supports the ability to scale an image to fit a screen having any aspect ratio as fully as possible without distortion. The HTML img element lacks this capability.

01-30-2020, 11:29 AM	#3
Tex2002ans Wizard Posts: 2,297 Karma: 12126329 Join Date: Jul 2012 Device: Kobo Forma, Nook	See this thread from 2018: SVG Images - Why? In my Post #11, I show examples of what can happen without the SVG wrapper. (Images can get heavily distorted/cropped.)

01-30-2020, 12:44 PM	#4
DiapDealer Grand Sorcerer Posts: 27,549 Karma: 193191846 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	You keep mentioning Sigil 1.0.0 in regards to things that have been a part of Sigil for many years. It's fine; it's just that I keep seeing the headlines and thinking there's some new issue that 1.0.0 has introduced (and panicking just a bit to be honest ). Is 1.0.0 the first version of Sigil you've used, or are you coming from an ancient version that didn't have many of these features?

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