The HTML5 Verge Viewer can be delivered using Scalable Vector Graphics (SVG). Using SVG has proven to deliver a significant increase in quality but such is only valid in certain scenarios and browsers. Before uploading and delivering a Publication using SVG it is important to be aware of the technology, best practices and what is supported.
1. How do I enable HTML5 vector support for a publication?
Enabling the experimental HTML5 vector support for a publication is a two-step process.
First, enable “Use experimental HTML5 vector support” under “Advanced” in the PDF upload dialog. This is not enabled by default because the conversion process will take approximately twice as long with HTML5 vector support enabled.
Secondly, edit the publication and check “Use experimental HTML5 vector support” (this option will only be visible if the publication has been converted with HTML5 vector support enabled).
2. Which browsers are supported?
On the desktop, the following browsers are supported:
Internet Explorer 9, 10 and 11.
Google Chrome
Safari 6.
Firefox is not supported.
Internet Explorer 9, 10 and 11.
Google Chrome
Safari 6.
Firefox is not supported.
On iPad, Safari on iOS 6 or above is supported. The Android platform, iPhone and iPod is not supported.
Devices not supporting HTML5 vector images will use the standard HTML5 solution.
3. Which kinds of image improvements should be expected when HTML5 vector support is enabled?
Text is rendered more clearly, especially when not in zoom mode. In certain cases, other rendering differences might also occur.
4. Is there a performance penalty?
Yes. In general, the vector images require more computing power to render, but this depends a lot on the actual PDF’s being used. The best approach is to try out individual PDF’s in experimental HTML5 vector mode and judge for yourself. Tests so far have shown that hi-fidelity publications with a limited amount of text (e.g. Magazine publications) benefit a lot from using vector images, whereas text-intensive publications often become too unwieldy when vector images are used.
5. Text is getting blurry when I zoom. Why is this?
In a number of browsers, the vector image is not re-rendered when zooming in and out, and this can result in the text getting blurry. Unfortunately, this is a limitation of the current platform, and there is nothing we can do about this in the short term. In Internet Explorer 9 and 10, vector images are re-rendered when zooming in and out, so use these browsers for the best experience.
6. What does it mean that the feature is Experimental?
HTML5 vector imaging is not yet a mature technology, and the quality provided is the best possible within current technology constraints. As such, the feature is provided "as is", and you should not expect the feature to be significantly improved in the short term.
7. Can customers start using this right away?
Yes, by all means. It can only be applied to Publications that have been uploaded using the new settings.
8. Are there any known issues I should be aware of?
It has been noted that in some cases the PDF benefits from being fully "flattened" before being uploaded. Flattening a PDF renders down all the layers in the PDF without jeopardizing quality and is therefore a great best practice. A "how to " can be found below and contact Support if requesting additional help:
https://publicatorcommunity.zmags.com/hc/en-us/articles/115002516446
8. Are there any known issues I should be aware of?
It has been noted that in some cases the PDF benefits from being fully "flattened" before being uploaded. Flattening a PDF renders down all the layers in the PDF without jeopardizing quality and is therefore a great best practice. A "how to " can be found below and contact Support if requesting additional help:
https://publicatorcommunity.zmags.com/hc/en-us/articles/115002516446
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