Use Go fonts by default #127

Activity

1. llgcode

   added

   enhancement

   and removed

   enhancement

   on Dec 15, 2016
2. llgcode commented on Dec 15, 2016

   

   llgcode

   on Dec 15, 2016

   Owner

   More actions

   Hi @gerald1248
   An article on how to use it in draw2d can be interesting.
3. llgcode

   added

   help wanted

   on Dec 15, 2016
4. drahoslove commented on Dec 18, 2016

   

   drahoslove

   on Dec 18, 2016

   Last edited by drahoslove

   Contributor

   More actions

   Thanks, @gerald1248, for this idea.
   I'm currently using go fonts in draw2d like this:
   (Note: I use only Name attribute of FontData for simplification.)

   package gui
   
   import (
   	"fmt"
   	"github.com/llgcode/draw2d"
   	"github.com/golang/freetype/truetype"
   	"golang.org/x/image/font/gofont/goregular"
   	"golang.org/x/image/font/gofont/gobold"
   	"golang.org/x/image/font/gofont/goitalic"
   	"golang.org/x/image/font/gofont/gomono"
   )
   
   type MyFontCache map[string]*truetype.Font
   
   func (fc MyFontCache) Store(fd draw2d.FontData, font *truetype.Font) {
   	fc[fd.Name] = font
   }
   
   func (fc MyFontCache) Load(fd draw2d.FontData) (*truetype.Font, error) {
   	font, stored := fc[fd.Name]
   	if !stored {
   		return nil, fmt.Errorf("Font %s is not stored in font cache.", fd.Name)
   	}
   	return font, nil
   }
   
   func init () {
   	fontCache := MyFontCache{}
   
   	TTFs := map[string]([]byte){
   		"goregular": goregular.TTF,
   		"gobold": gobold.TTF,
   		"goitalic": goitalic.TTF,
   		"gomono": gomono.TTF,
   	}
   
   	for fontName, TTF := range TTFs {
   		font, err := truetype.Parse(TTF)
   		if err != nil {
   			panic(err)
   		}
   		fontCache.Store(draw2d.FontData{Name: fontName}, font)
   	}
   
   	draw2d.SetFontCache(fontCache)
   }

   Maybe this font (goregular) could be part of draw2d as default font. They (all go fonts) could be automatically preloaded in similar way in defaultFontCache.

   👍React with 👍6Reacted by llgcode, redstarcoder, Gerald Schmidt, Diego Medina, Max McDonnell and CasMc
5. gerald1248 commented on Dec 21, 2016

   

   gerald1248

   on Dec 21, 2016

   Last edited by gerald1248

   ContributorAuthor

   More actions

   @Drahoslav7: This is pretty much exactly what I'm using in my custom font cache (GitHub).

   The question is how do deal with the existing library layout and expectation that fonts are fetched from the filesystem. For example, I've thrown out the resource folder but then I have to set the font directory to . to avoid errors being thrown.

   The existing font namer etc. is all working and useful but ideally it would be an optional extra. As far as I can tell, mapping bytearrays to the font descriptors the way you've done looks to me like the most Go-like way to do it.