Added: PDF generation - Githubissues

Added PDF generation (with selectable text)

Uses SKNWayCanvas to be able to draw on multiple canvases (Image and PDF)
Inverted/Reverse printing is fixed in the PDF using a final image that filters everything that should be white +this inverted =

Added: Download ZPL, PNG, and PDF buttons in the web interface

Added: GraphicCircle supports reverse draw now

Improved: GraphicBox rounding and border settings vs

Improved: Inverted/Reverse printing

Only GraphicBox/Circle is a bitmap operation now
The rest is rendered using SKBlendMode.Xor
Color swapping is done using SKColorFilter.CreateColorMatrix for bitmap operations
When white is printed with ^FR, we simply change the color to black or don't invert the color
The performance is great! (The GLS label from #64, added as Example11 is 100ms instead of 400ms now)

Old:

New:

Other small improvements:

Added: Extra test and examples
Added: Tabs for tests and examples that are sorted on the web interface
Improved: View controller calls can assume that the image needs a white background
Improved: Examples change the canvas size in the web interface (And the overlay isn't limited to full inches anymore)

Based on: #217 #218 #219 and used the improvement from #193 while trying to resolve the mentioned issues in #64

BinaryKits / BinaryKits.Zpl