ml
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
package graphics
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import (
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"encoding/binary"
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"github.com/inkyblackness/hacked/ss1/content/bitmap"
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"github.com/inkyblackness/hacked/ss1/resource"
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"github.com/inkyblackness/hacked/ss1/world/ids"
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"github.com/inkyblackness/hacked/ui/opengl"
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)
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// PaletteCache loads palettes and provides OpenGL textures.
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type PaletteCache struct {
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gl opengl.OpenGL
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localizer resource.Localizer
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palettes map[resource.Key]*PaletteTexture
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}
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// NewPaletteCache returns a new instance.
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func NewPaletteCache(gl opengl.OpenGL, localizer resource.Localizer) *PaletteCache {
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cache := &PaletteCache{
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gl: gl,
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localizer: localizer,
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palettes: make(map[resource.Key]*PaletteTexture),
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}
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return cache
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}
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// InvalidateResources lets the cache remove any palette from resources that are specified in the given slice.
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func (cache *PaletteCache) InvalidateResources(ids []resource.ID) {
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for _, id := range ids {
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for key, texture := range cache.palettes {
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if key.ID == id {
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texture.Dispose()
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delete(cache.palettes, key)
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}
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}
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}
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}
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// Palette returns the palette with given index - if available.
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func (cache *PaletteCache) Palette(index int) (*PaletteTexture, error) {
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key := resource.KeyOf(ids.GamePalettesStart.Plus(index), resource.LangAny, 0)
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pal, existing := cache.palettes[key]
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if existing {
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return pal, nil
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}
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selector := cache.localizer.LocalizedResources(key.Lang)
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view, err := selector.Select(key.ID)
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if err != nil {
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return nil, err
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}
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if view.ContentType() != resource.Palette {
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return nil, resource.ErrWrongType(key, resource.Palette)
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}
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reader, err := view.Block(key.Index)
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if err != nil {
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return nil, err
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}
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var palette bitmap.Palette
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err = binary.Read(reader, binary.LittleEndian, &palette)
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if err != nil {
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return nil, err
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}
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pal = NewPaletteTexture(cache.gl, &palette)
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cache.palettes[key] = pal
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return pal, nil
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}
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