Codechange: Give sprite encoders a hint which colour components of a sprite are filled with useful information.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/spritecache.cpp b/src/spritecache.cpp
index c045605d6..f86be1b97 100644
--- a/src/spritecache.cpp
+++ b/src/spritecache.cpp
@@ -199,6 +199,7 @@ static bool ResizeSpriteIn(SpriteLoader::Sprite *sprite, ZoomLevel src, ZoomLeve
 	sprite[tgt].height = sprite[src].height * scaled_1;
 	sprite[tgt].x_offs = sprite[src].x_offs * scaled_1;
 	sprite[tgt].y_offs = sprite[src].y_offs * scaled_1;
+	sprite[tgt].colours = sprite[src].colours;
 
 	sprite[tgt].AllocateData(tgt, sprite[tgt].width * sprite[tgt].height);
 
@@ -221,6 +222,7 @@ static void ResizeSpriteOut(SpriteLoader::Sprite *sprite, ZoomLevel zoom)
 	sprite[zoom].height = UnScaleByZoom(sprite[ZOOM_LVL_NORMAL].height, zoom);
 	sprite[zoom].x_offs = UnScaleByZoom(sprite[ZOOM_LVL_NORMAL].x_offs, zoom);
 	sprite[zoom].y_offs = UnScaleByZoom(sprite[ZOOM_LVL_NORMAL].y_offs, zoom);
+	sprite[zoom].colours = sprite[ZOOM_LVL_NORMAL].colours;
 
 	sprite[zoom].AllocateData(zoom, sprite[zoom].height * sprite[zoom].width);
 
@@ -487,6 +489,7 @@ static void *ReadSprite(const SpriteCache *sc, SpriteID id, SpriteType sprite_ty
 		sprite[ZOOM_LVL_NORMAL].x_offs = sprite[ZOOM_LVL_FONT].x_offs;
 		sprite[ZOOM_LVL_NORMAL].y_offs = sprite[ZOOM_LVL_FONT].y_offs;
 		sprite[ZOOM_LVL_NORMAL].data   = sprite[ZOOM_LVL_FONT].data;
+		sprite[ZOOM_LVL_NORMAL].colours = sprite[ZOOM_LVL_FONT].colours;
 	}
 
 	return encoder->Encode(sprite, allocator);