From November 14, there was a post referencing the import_bmp.ulp script that imports a bitmap onto a board.
After configuring eagle per the sparkfun tutorials (grid size etc) when I attempt to import a bmp image, my grid appears to change to mils from .05 inch grid with components snapping to .1 inch…
I am not sure what values to enter for scaling of bmp when configuring import_bmp.ulp so resultant grid is “left alone” ? Anyone have any advice?
Ref: my bitmap is 103 x 124 pixels 300 dpi. Is it better to use a 100 x 100 bmp? How do you account for DPI?
I don’t have this problem, I use a different method for importing bitmaps in my designs: I have created a library with packages only (no symbols or devices) to use only for bitmaps to import.
For every bitmap I create a new package, and before saving I make some import tests with different scale settings to get the desired size (for 1 bmp I can make also different sizes, using different packages)
done that in the board editor I choose “add” and you can place your bmp without messing the board grid (and aligment)
That worked perfectly! your advice took about 5 minutes to implement (mostly import tests to get the size just right, a few back and forths with Gimp to edit the bitmap, etc).