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Add webp support

#1

Hi Team, can we add support for webp?

Thanks!

#2

It’s added to the todo list. Which client you talked specifically here? XYZ, WMS, WMTS, or for some specific server?

#3

I actually meant for webp files - as raster layer. But since webp is so efficient, I assume it would be great for any other layer

#4

I’m even wondering if adding a cache option for webp would be benefitial? Worth investigating

#5

You are right! We will make it happen and keep you posted.

#6

Sweet! No rush, this is not mission critical, just a though I had yesterday :smiley:
Especially for web based layers it seems useful, 25% - 35% reduction in filetransfer size is huge if the server offers it.

#7

Hi Julian,

Can you pull beta040 and give it a shot? It should support webp now.

Thanks,
Ben

1 Like
#8

Hi Ben, I get “File does not exist” - it’s trying to find a “.wepw” file.

However, my GIS Export gave me a “.webp”, “.webp.aux.xml” and “.webp.ovr” file.

#9

I see. Can you send us a test file (including .webp, .webp.aux.xml, .webp.ovr) so we can make sure the changes would works for you?

#10

And you can try beta041 for a quick, it should now support .aux.xml.

#11

Hi Ben, same error - i sent the files via email!

Thanks :smiley:

#12

It works for me with beta041, here is my complete code, can you give it another shot?

      var webp = Path.Combine(
          AppDomain.CurrentDomain.BaseDirectory,
          "Data", "Stadtkarte_farbig_erweite.webp");

      Console.WriteLine($"webp:    {webp}");
      Console.WriteLine($"aux.xml: {File.Exists(webp + ".aux.xml")}");
      Console.WriteLine($"ovr:     {File.Exists(webp + ".ovr")}");

      var layer = new SkiaRasterLayer(webp);
      layer.Open();
      var bbox = layer.GetBoundingBox();
   
      var image = new GeoImage(1024, 1024);
      var canvas = new SkiaGeoCanvas();
      var extent = ThinkGeo.Core.MapUtil.GetDrawingExtent(layer.GetBoundingBox(), image.Width, image.Height);
      canvas.BeginDrawing(image, extent, GeographyUnit.Meter);
layer.Draw(canvas, new Collection<SimpleCandidate>());
      canvas.EndDrawing();

      image.Save("Stadtkarte_rendered.png");
#13

Ah, I used WpfRasterLayer instead of SkiaRasterLayer. With Skia it works! With WpfRaster I get the exception.
Thanks!

#14

It’s just added to WpfRasterLayer as well in beta042.

#15

I’m sorry, but I get the exception still for WpfRasterLayer in beta042 - The file specified does not exist (.wpw)

#16

Can you pull beta044 and give it another shot?

#17

Hi Ben, that works now! Thanks :slight_smile:

#18

That’s awesome :grinning: