tins2020/fonts.go

package tins2020

import (
	"fmt"

	"github.com/veandco/go-sdl2/ttf"
	"opslag.de/schobers/fs/vfs"
)

type Fonts struct {
	dir   vfs.CopyDir
	fonts map[string]*ttf.Font
}

func (f *Fonts) Init(dir vfs.CopyDir) {
	f.dir = dir
	f.fonts = map[string]*ttf.Font{}
}

func (f *Fonts) Font(name string) *ttf.Font { return f.fonts[name] }

type FontDescriptor struct {
	Name string
	Path string
	Size int
}

func (f *Fonts) LoadDesc(fonts ...FontDescriptor) error {
	for _, desc := range fonts {
		err := f.Load(desc.Name, desc.Path, desc.Size)
		if err != nil {
			return fmt.Errorf("error loading '%s'; error: %v", desc.Name, err)
		}
	}
	return nil
}

func (f *Fonts) Load(name, path string, size int) error {
	fontPath, err := f.dir.Retrieve(path)
	if err != nil {
		return err
	}
	font, err := ttf.OpenFont(fontPath, size)
	if err != nil {
		return err
	}
	if font, ok := f.fonts[name]; ok {
		font.Close()
	}
	f.fonts[name] = font
	return nil
}

func (f *Fonts) Destroy() {
	if f.fonts == nil {
		return
	}
	for _, f := range f.fonts {
		f.Close()
	}
}