[nostalgia] Move pack transforms to modules

src/nostalgia/core/module.cpp

@@ -2,14 +2,19 @@
  * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
  */
 
+#include <ox/model/model.hpp>
+
 #include <nostalgia/foundation/module.hpp>
 
+#include "gfx.hpp"
 #include "typeconv.hpp"
 
 #include "module.hpp"
 
 namespace nostalgia::core {
 
+CoreModule CoreModule::mod;
+
 ox::Vector<foundation::BaseConverter*> CoreModule::converters() const noexcept {
 	return {
 		&nostalgiaPaletteToPaletteConverter,
@@ -18,6 +23,19 @@ ox::Vector<foundation::BaseConverter*> CoreModule::converters() const noexcept {
 	};
 }
 
-CoreModule CoreModule::mod;
+ox::Vector<foundation::PackTransform> CoreModule::packTransforms() const noexcept {
+	return {
+		// convert tilesheets to CompactTileSheets
+		[](foundation::Context *ctx, ox::Buffer *buff) -> ox::Error {
+			oxRequire(hdr, ox::readClawHeader(*buff));
+			const auto typeId = ox::buildTypeId(hdr.typeName, hdr.typeVersion);
+			if (typeId == ox::buildTypeId<TileSheet>() ||
+			    typeId == ox::buildTypeId<NostalgiaGraphic>()) {
+				oxReturnError(foundation::convertBuffToBuff<core::CompactTileSheet>(ctx, *buff, ox::ClawFormat::Metal).moveTo(buff));
+			}
+			return {};
+		},
+	};
+}
 
 }