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// Copyright 2010 The draw2d Authors. All rights reserved.
// created: 13/12/2010 by Laurent Le Goff
package draw2d
import (
"code.google.com/p/freetype-go/freetype/truetype"
"io/ioutil"
"log"
"path"
)
var (
fontFolder = "../resource/font/"
fonts = make(map[string]*truetype.Font)
)
type FontStyle byte
const (
FontStyleNormal FontStyle = iota
FontStyleBold
FontStyleItalic
)
type FontFamily byte
const (
FontFamilySans FontFamily = iota
FontFamilySerif
FontFamilyMono
)
type FontData struct {
Name string
Family FontFamily
Style FontStyle
}
func fontFileName(fontData FontData) string {
fontFileName := fontData.Name
switch fontData.Family {
case FontFamilySans:
fontFileName += "s"
case FontFamilySerif:
fontFileName += "r"
case FontFamilyMono:
fontFileName += "m"
}
if fontData.Style&FontStyleBold != 0 {
fontFileName += "b"
} else {
fontFileName += "r"
}
if fontData.Style&FontStyleItalic != 0 {
fontFileName += "i"
}
fontFileName += ".ttf"
return fontFileName
}
func RegisterFont(fontData FontData, font *truetype.Font) {
fonts[fontFileName(fontData)] = font
}
func GetFont(fontData FontData) *truetype.Font {
fontFileName := fontFileName(fontData)
font := fonts[fontFileName]
if font != nil {
return font
}
fonts[fontFileName] = loadFont(fontFileName)
return fonts[fontFileName]
}
func GetFontFolder() string {
return fontFolder
}
func SetFontFolder(folder string) {
fontFolder = folder
}
func loadFont(fontFileName string) *truetype.Font {
fontBytes, err := ioutil.ReadFile(path.Join(fontFolder, fontFileName))
if err != nil {
log.Println(err)
return nil
}
font, err := truetype.Parse(fontBytes)
if err != nil {
log.Println(err)
return nil
}
return font
}
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