Quote:
Originally Posted by Trane
My issue is I want to retain transparency. A white bg is not acceptable.
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I am scratching my head on a usage where Transparency is A MUST though.
If your PNG is using transparency, you also have to keep in mind Night Mode (or reading on different color backgrounds or different color fonts). For example, the lines/image is Black + dark background = the image may become impossibly hard to read/see. Or e-ink might not show transparency as well as you expect.
On a semi-related note, I did write a bit + show example images in the topic "Problem with inline image", where we were discussing embedded fonts vs. embedded images (different backgrounds/font colors):
https://www.mobileread.com/forums/sh...78#post3389678
But you can't really know unless you show specifics. Every image/book/case is different. :P
Quote:
Originally Posted by GrannyGrump
Tex, I think the topic you are remembering is this one:
https://www.mobileread.com/forums/sh...d.php?t=225518
I tripped over it recently, after it had completely fallen out of my memory  I have been re-reading it and starting to use some forgotten tips from that thread, even if it is from 4 years back. I still always use Jellby's tip to down-size in several steps --- it works wonderfully to reduce the jaggies! |
Yep, that's the one. 4 Years... my gods.
I always try to look up the references to the name of compression tools + "Tex2002ans" or "GrannyGrump" + "4-bit PNG" bug, because I know those are always re-referenced every time PNGs come up. Then it leads me to all the other great PNG discussions we had over the years. That one must have just slipped through my searching cracks this time around. :P
Side Note: I still think I did a pretty good analysis of Grayscale/Indexed PNGs on your 4-bit PNG bug:
https://www.mobileread.com/forums/sh...82#post2646582
And that in-depth PNG research I did for that post still sticks with me to this day. Maybe I should bust open the specs and refresh my memory. :P