DM-6980: Fix PNG creation for marker

[cwang2016]

Fixing method:
Marker size is represented by a small pure number (magnitude of thousandth) in term of world coordinate (J2000). World coordinate is a hint to set the size value with 'degree' unit, otherwise the size value was treated with 'pixel' unit, too small to be shown in the PNG.

[cwang2016]

test:
select any image, click 'marker/footprint' button, select 'Add Marker', click 'save fits, png...' button, and choose 'png' for download, check if the marker is shown in the download PNG.

[xiuqin]

1. The color of the marker does not show up in PNG.
2. The Marker label does not show in PNG
3. The catalog overlaid on image was square on screen, but cross (X) on PNG.

[robyww]

I see the same thing the Xiuqin saw.

After talking to Cindy, I think there is still and issue with the markers (maybe with color change?) and another issue with catalogs. So the scope of this ticket is bigger than we thought.

We might not support all the shapes on server side. She is going to look into it.

[cwang2016]

More updates are added to fix the issues regarding PNG download from both image search and catalog search, including

• showing the marker added from marker/footprint dropdown list.
• showing the right color as color changed from drawing layer popup.
• showing the marker with the right color and right point shape from catalog search.
• showing the marker/footprint label.

[ejoliet]

I have tested this fix in http://localhost:8080/firefly/demo/ffapi-highlevel-test.html but i don't see the fix. Am i doing something wrong for testing?

See attached image on left the PNG downloaded and right the browser viewer.

Can't reproduce.

[ejoliet]

Update: the fix works in firefly viewer. Maybe it doesn't in the API mode?

[ejoliet]

Works also great in IRSAVIewer, i've checked.

Really minor: compass rose is included in PNG but not the labels 'N', 'E'.

[cwang2016]

more update:
change the color of compass labels, from 'black' to 'red'.