Adding modding folder with a hacked build.

modding/hacked/ss1/content/bitmap/AnimationCache.go

@@ -0,0 +1,58 @@
+package bitmap
+
+import (
+	"github.com/inkyblackness/hacked/ss1/resource"
+)
+
+// AnimationCache retrieves animations from a localizer and keeps them decoded until they are invalidated.
+type AnimationCache struct {
+	localizer resource.Localizer
+
+	animations map[resource.Key]Animation
+}
+
+// NewAnimationCache returns a new instance.
+func NewAnimationCache(localizer resource.Localizer) *AnimationCache {
+	cache := &AnimationCache{
+		localizer:  localizer,
+		animations: make(map[resource.Key]Animation),
+	}
+	return cache
+}
+
+// InvalidateResources lets the cache remove any animations from resources that are specified in the given slice.
+func (cache *AnimationCache) InvalidateResources(ids []resource.ID) {
+	for _, id := range ids {
+		for key := range cache.animations {
+			if key.ID == id {
+				delete(cache.animations, key)
+			}
+		}
+	}
+}
+
+// Animation tries to look up given animation.
+func (cache *AnimationCache) Animation(key resource.Key) (anim Animation, err error) {
+	anim, existing := cache.animations[key]
+	if existing {
+		return anim, nil
+	}
+	selector := cache.localizer.LocalizedResources(key.Lang)
+	view, err := selector.Select(key.ID)
+	if err != nil {
+		return
+	}
+	if (view.ContentType() != resource.Animation) || (view.BlockCount() != 1) {
+		return anim, resource.ErrWrongType(key, resource.Animation)
+	}
+	reader, err := view.Block(0)
+	if err != nil {
+		return
+	}
+	anim, err = ReadAnimation(reader)
+	if err != nil {
+		return
+	}
+	cache.animations[key] = anim
+	return anim, nil
+}