Picture size/quality XP vs Win7 vs MacOS

[Tompa79]

I ran in to an odd problem the other day. I have created a calculated containerfield containing a png graphic set from another containerfield in wich I keep the original graphics.

I have created a quite large pie chart in Photoshop 259x259 pixels to be exact. Saved as a png (save for web and devices). and inserted picture into a containerfield with 20 repetitions. One rep for each 5%.

The calculated container fetches graphics from this field.

The actual field on the layout is just 20x20 pixels large, but on other layouts I might need a larger one.

On XP (my comp) this looks perfect - nice round pie chart symbomls. Then on of my collegues says that they look kind of bad - no round corners at all. What? I say and looks at them at his computer - baad, I also notice that other icons we ALSO use looks quite bad compared to XP - weird.

So I ask all of the collegues to check it out - always bad om win7 - always good on XP and MacOS.

I then switched to gif-format instead - nah, still bad on win7 - but another bad - instead of chunky quality, the chunky bits became just black pixels - my nice round pie chart turned to an odd star or something...

Third attempt - downsized the original picture in Photoshop to 20x20 and disabled fm:s resize of the graphics - Ok, this worked fine - pie chart looks ok even on Win7.

My questions/thoughts are - How can win7 render the graphic so differently? I know that it's probably best practive to always do downsampling in an external graphics program, but I had never really encountered a problem NOT doing it until now? What are your practices/experiences on the matter?

/Tomas

[snbowers]

I have run into this same issue recently and was just about to post a new topic when I ran across this entry. Have you had any luck finding answers to this issue?

I have several png graphics I'd loaded into a FileMaker solution over a couple of years ago. It's a pretty standard practice to load them into a container field at a higher resolution, often a multiple of the typical size you'd need, so that they'll still look nice if printed, if a user zooms in to enlarge the layout, etc. The pngs I created looked great, had smooth edges, etc. like you spoke about. They've looked great on XP, Mac OS, and Vista. Now, on Windows 7, in either FileMaker 10.x or 11.x, the pngs have bad edges and look misformed. I've tried tons of different angles on this, as you have, and nothing so far makes any difference. Is this perhaps a bug in FileMaker 10/11 and how it interacts with Windows 7?

Please let me know what you've found out. Thanks.

S. N. Bowers