font resource

font.css

@url font1Url font1;
@font-face
{
   font-family: MyFont1;
   src: font1Url format('opentype');
   font-weight: normal;
   font-style: normal;
}

@url font2Url font2;
@font-face
{
   font-family: MyFont2;
   src: font2Url format('opentype');
   font-weight: normal;
   font-style: normal;
}

@url font3Url font3;
@font-face
{
   font-family: MyFont3;
   src: font3Url format('opentype');
   font-weight: normal;
   font-style: normal;
}

FontResource.java

public interface FontResource extends ClientBundle
{
   FontResource INSTANCE = GWT.create(FontResource.class);

   @Source("font1.otf")
   DataResource font1();

   @Source("font2.otf")
   DataResource font2();

   @Source("font3.otf")
   DataResource font3();

   @Source("font.css")
   CssResource css();
}

generated.css

/* FontResource.java and font.css will generate something similar to the following CSS */
@font-face
{
	font-family:MyFont1;
	src:url(http://10.10.10.10:8081/gwt_app/5F80AF6F2BD333983585159DE2E158E0.cache.otf) format(opentype);
	font-weight:normal;
	font-style:normal;
}

@font-face
{
	font-family:MyFont2;
	src:url(http://10.10.10.10:8081/gwt_app/A32759B935A5B8A190AF4C10889BFFD4.cache.otf) format(opentype);
	font-weight:normal;
	font-style:normal;
}

@font-face
{
	font-family:MyFont3;
	src:url(http://10.10.10.10:8081/gwt_app/EA810D510EC77E10ACB62B3EDC81A216.cache.otf) format(opentype);
	font-weight:normal;
	font-style:normal;
}