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.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Cover image in Sigil 5.3?	andreas3	Sigil	5	06-26-2014 08:43 AM
Sigil adding blank page after cover image	ebookn00b	Sigil	32	06-20-2013 01:44 PM
Cover image issues with Sigil 0.6 and Calibre	boatat72	Sigil	3	01-17-2013 12:30 AM
Cover image isn't displaying as cover image	Eugene88	Sigil	3	08-15-2012 04:05 PM
Sigil Cover image Question	ralphiedee	Sigil	9	05-30-2012 10:54 AM

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: 7,062 Karma: 91577715 Join Date: Nov 2011 Location: Charlottesville, VA 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: 2,306 Karma: 13057279 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: 28,534 Karma: 204127028 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?

Advert

Advert