Adding modding folder with a hacked build.

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

@@ -0,0 +1,67 @@
+package bitmap
+
+import (
+	"github.com/inkyblackness/hacked/ss1/resource"
+	"github.com/inkyblackness/hacked/ss1/serial"
+)
+
+// PaletteCache retrieves palettes from a localizer and keeps them decoded until they are invalidated.
+type PaletteCache struct {
+	localizer resource.Localizer
+
+	defaultPalette Palette
+	palettes       map[resource.Key]Palette
+}
+
+// NewPaletteCache returns a new instance.
+func NewPaletteCache(localizer resource.Localizer) *PaletteCache {
+	cache := &PaletteCache{
+		localizer: localizer,
+		palettes:  make(map[resource.Key]Palette),
+	}
+	for i := 0; i < len(cache.defaultPalette); i++ {
+		col := &cache.defaultPalette[i]
+		col.Red = uint8(i)
+		col.Green = uint8(i)
+		col.Blue = uint8(i)
+	}
+	return cache
+}
+
+// InvalidateResources lets the cache remove any palettes from resources that are specified in the given slice.
+func (cache *PaletteCache) InvalidateResources(ids []resource.ID) {
+	for _, id := range ids {
+		for key := range cache.palettes {
+			if key.ID == id {
+				delete(cache.palettes, key)
+			}
+		}
+	}
+}
+
+// Palette tries to look up given palette.
+func (cache *PaletteCache) Palette(key resource.Key) (pal Palette, err error) {
+	pal, existing := cache.palettes[key]
+	if existing {
+		return pal, nil
+	}
+	selector := cache.localizer.LocalizedResources(key.Lang)
+	view, err := selector.Select(key.ID)
+	if err != nil {
+		return cache.defaultPalette, err
+	}
+	if (view.ContentType() != resource.Palette) || (view.BlockCount() != 1) {
+		return cache.defaultPalette, resource.ErrWrongType(key, resource.Palette)
+	}
+	reader, err := view.Block(0)
+	if err != nil {
+		return cache.defaultPalette, err
+	}
+	decoder := serial.NewDecoder(reader)
+	decoder.Code(&pal)
+	if decoder.FirstError() != nil {
+		return cache.defaultPalette, decoder.FirstError()
+	}
+	cache.palettes[key] = pal
+	return pal, nil
+}