ml
59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package bitmap
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import (
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"github.com/inkyblackness/hacked/ss1/resource"
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)
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// AnimationCache retrieves animations from a localizer and keeps them decoded until they are invalidated.
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type AnimationCache struct {
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localizer resource.Localizer
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animations map[resource.Key]Animation
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}
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// NewAnimationCache returns a new instance.
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func NewAnimationCache(localizer resource.Localizer) *AnimationCache {
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cache := &AnimationCache{
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localizer: localizer,
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animations: make(map[resource.Key]Animation),
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}
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return cache
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}
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// InvalidateResources lets the cache remove any animations from resources that are specified in the given slice.
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func (cache *AnimationCache) InvalidateResources(ids []resource.ID) {
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for _, id := range ids {
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for key := range cache.animations {
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if key.ID == id {
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delete(cache.animations, key)
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}
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}
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}
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}
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// Animation tries to look up given animation.
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func (cache *AnimationCache) Animation(key resource.Key) (anim Animation, err error) {
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anim, existing := cache.animations[key]
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if existing {
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return anim, 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
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}
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if (view.ContentType() != resource.Animation) || (view.BlockCount() != 1) {
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return anim, resource.ErrWrongType(key, resource.Animation)
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}
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reader, err := view.Block(0)
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if err != nil {
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return
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}
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anim, err = ReadAnimation(reader)
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if err != nil {
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return
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}
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cache.animations[key] = anim
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return anim, nil
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}
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