Quote:
Originally Posted by slowsmile
Another problem is troubling me now concerning how to format images for KF7, KF8 AND KFX when you upload just an epub. This problem arises particularly if you use banner-like images(width much wider than height) that are smaller in width than the full screen width of the reading device.
I tested the above problem recently and can find no way to adequately satisfy the image formatting requirements for KF8, KF7 as well as satisfying the HDV sizing requirements for KFX or ET-enabled devices.
For example, say you have alot of banner-like images -- smaller than screen width -- that you want to insert into your epub. It's easy enough to satisfy the KF8 and KF7 requirements using dual image formatting with media queries. But how do you also satisfy the KFX requirement, which also requires that you satisfy the High Definition Visual image sizing specification for KFX? This HDV sizing compliance specification is shown below:
- For 50% screen width, your image must be at least 600 x 900 px in size.
- For 75% screen width, your image must be at least 900 x 1350 px in size.
- For 100% screen width, your image must be at least 1200 x 1800 px in size.
Notice how much larger the images have to be for KFX sizing compliance as compared to the smaller sizing requirements for KF8 or KF7 images.
And so there seems to be a big problem with images (that does not really affect KF8). Should I format and size all my banner-like images according to the KF7 requirements(in absolute pixels) or should I format my images as 75% screen width using KFX's image sizing compliance of 900 x 1350 pixels?
The problem arises when you add your images to the epub. Do I add all those images sized in pixels at the actual size that they will be displayed on the screen for KF7 or do I add all my epub images as per the HDV sizing compliance for KFX?
If you use KF7 pixel dimensions(not percentages) in your epub image formatting then, on all KFX devices, you're going to get images that may look degraded or smaller due non-compliance with the HDV image sizing spec.
And if I format and add all my banner-like images to my epub according to the KFX spec as 75% screen width then all I'm ever going to get on KF7 devices is a full screen width image which is not what I want.
The only way I can see where it would be possible to satisfy all image requirements across all KF7, KF8 and KFX devices easily would be to just insert ALL images according to the KFX HDV spec at max screen width(as a percentage of h/w) and just hope for the best, which is a crappy solution really. |
Why not just use the HD sizing but stick with the KF8 and 7 sizing? What do you think that would do?
Hitch