88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
package d2asset
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"image/color"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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)
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const (
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fontBudget = 64
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)
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// Static checks to confirm struct conforms to interface
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var _ d2interface.FontManager = &fontManager{}
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var _ d2interface.Cacher = &fontManager{}
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type fontManager struct {
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*AssetManager
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cache d2interface.Cache
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}
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// LoadFont loads a font from the archives managed by the ArchiveManager
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func (fm *fontManager) LoadFont(tablePath, spritePath, palettePath string) (d2interface.Font,
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error) {
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cachePath := fmt.Sprintf("%s;%s;%s", tablePath, spritePath, palettePath)
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if font, found := fm.cache.Retrieve(cachePath); found {
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return font.(d2interface.Font), nil
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}
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sheet, err := fm.LoadAnimation(spritePath, palettePath)
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if err != nil {
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return nil, err
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}
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data, err := fm.LoadFile(tablePath)
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if err != nil {
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return nil, err
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}
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if string(data[:5]) != "Woo!\x01" {
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return nil, errors.New("invalid font table format")
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}
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_, maxCharHeight := sheet.GetFrameBounds()
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glyphs := make(map[rune]fontGlyph)
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for i := 12; i < len(data); i += 14 {
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code := rune(binary.LittleEndian.Uint16(data[i : i+2]))
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var glyph fontGlyph
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glyph.frame = int(binary.LittleEndian.Uint16(data[i+8 : i+10]))
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glyph.width = int(data[i+3])
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glyph.height = maxCharHeight
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glyphs[code] = glyph
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}
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font := &Font{
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sheet: sheet,
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glyphs: glyphs,
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color: color.White,
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}
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if err != nil {
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return nil, err
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}
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if err := fm.cache.Insert(cachePath, font, 1); err != nil {
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return nil, err
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}
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return font, nil
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}
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// ClearCache clears the font cache
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func (fm *fontManager) ClearCache() {
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fm.cache.Clear()
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}
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// GetCache returns the font managers cache
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func (fm *fontManager) GetCache() d2interface.Cache {
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return fm.cache
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}
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