View Issue Details

IDProjectCategoryView StatusLast Update
0002825SkyChart1-Softwarepublic25-05-04 10:32
ReporterChristian Roßberg Assigned ToPatrick Chevalley  
PrioritynormalSeverityminorReproducibilityalways
Status assignedResolutionopen 
PlatformPCOSWindowsOS Version10 64bit
Product Version4.3 beta 
Summary0002825: Observation map printing issues
DescriptionI've added custom constellations (https://eyes4skies.de/v2/proj/virgo.htm) to SkySafari and changed lables for objects of interest.
It all looks well on my screen (DELL screen 3440x1440).
Resolution of save as function is too low (causes artifacts when printing).
Print as into Microsoft PDF printer has good resolution but font sizes to large and boxes surrounding DSS images.

I like to print my charts (as they apperar on screen) to DIN A4 papers for visual observation or add them into a document.
Any ideas / proposals?

Steps To ReproduceSave as function:
- Produces images with font and object sizes etc. similar to the screen
- Resolution is a bit too low. I get artifacts when adding them into DIN A4 documents for printing

Print feature:
- I printed into Microsoft PDF printer (600 DPI) with A4 landscape format
- Resolution (lines) better compared to save as
- Font size and lines significantly larger (compared to screen and save as)
- DSS images has grey boxes
TagsNo tags attached.

Activities

Christian Roßberg

25-04-25 07:31

reporter  

print_chart.png (18,269 bytes)   
print_chart.png (18,269 bytes)   
Sample2_screenshot.png (497,200 bytes)   
Sample2_screenshot.png (497,200 bytes)   
Sample2_save_as.png (316,728 bytes)   
Sample2_save_as.png (316,728 bytes)   
Sample2_save_as.jpg (319,991 bytes)   
Sample2_save_as.jpg (319,991 bytes)   
Sample1_save_as.jpg (466,867 bytes)   
Sample1_save_as.jpg (466,867 bytes)   
Sample1_save_as.png (354,969 bytes)   
Sample1_save_as.png (354,969 bytes)   
Sample1_screenshot.png (604,125 bytes)   
Sample1_screenshot.png (604,125 bytes)   

Patrick Chevalley

25-04-28 22:00

administrator   ~0009385

The best way to get a high resolution bitmap is to select "Bitmap file" in the menu File / Printer setup, then indicate a large value for Width and Height, for example 5000x3000.
Do this work better for you?

Patrick Chevalley

25-05-04 10:32

administrator   ~0009386

One more idea about this issue.

The problem with direct printing, PDF or Postscript is because the drawing API are much more limited than what I can use to produce a raster bitmap.
For example there is limitation to line type depending on the line width, no transparency for object pictures.
The advantage is to use much less memory and this is why I implemented that many years ago.

To make a bitmap of native resolution for A4 @ 600 DPI it require about 120MB of memory, the double if there is pictures, this is something any computer can accept now.
So I can change the default printing to use a raster image of better quality, keep the vector option only for very large print or memory limited computer.

Issue History

Date Modified Username Field Change
25-04-25 07:31 Christian Roßberg New Issue
25-04-25 07:31 Christian Roßberg File Added: print_chart.png
25-04-25 07:31 Christian Roßberg File Added: Sample2_Microsoft_PDF-printer_600DPI.pdf
25-04-25 07:31 Christian Roßberg File Added: Sample2_screenshot.png
25-04-25 07:31 Christian Roßberg File Added: Sample2_save_as.png
25-04-25 07:31 Christian Roßberg File Added: Sample2_save_as.jpg
25-04-25 07:31 Christian Roßberg File Added: Sample1_Microsoft_PDF-printer_600DPI.pdf
25-04-25 07:31 Christian Roßberg File Added: Sample1_save_as.jpg
25-04-25 07:31 Christian Roßberg File Added: Sample1_save_as.png
25-04-25 07:31 Christian Roßberg File Added: Sample1_screenshot.png
25-04-28 22:00 Patrick Chevalley Note Added: 0009385
25-05-04 10:32 Patrick Chevalley Assigned To => Patrick Chevalley
25-05-04 10:32 Patrick Chevalley Status new => assigned
25-05-04 10:32 Patrick Chevalley Note Added: 0009386