[nostalgia] Collapse NostalgiaCore down to a single library and cleanup impl data access

src/nostalgia/core/gfx.hpp

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <ox/std/types.hpp>
+#include <ox/model/def.hpp>
 #include <nostalgia/common/size.hpp>
 
 #include "color.hpp"
@@ -37,24 +38,18 @@ struct NostalgiaGraphic {
 	ox::Vector<uint8_t> pixels;
 };
 
-template<typename T>
-constexpr ox::Error model(T *io, NostalgiaPalette *pal) noexcept {
-	io->template setTypeInfo<NostalgiaPalette>();
-	oxReturnError(io->field("colors", &pal->colors));
-	return OxError(0);
-}
+oxModelBegin(NostalgiaPalette)
+	oxModelField(colors)
+oxModelEnd()
 
-template<typename T>
-constexpr ox::Error model(T *io, NostalgiaGraphic *ng) noexcept {
-	io->template setTypeInfo<NostalgiaGraphic>();
-	oxReturnError(io->field("bpp", &ng->bpp));
-	oxReturnError(io->field("rows", &ng->rows));
-	oxReturnError(io->field("columns", &ng->columns));
-	oxReturnError(io->field("defaultPalette", &ng->defaultPalette));
-	oxReturnError(io->field("pal", &ng->pal));
-	oxReturnError(io->field("pixels", &ng->pixels));
-	return OxError(0);
-}
+oxModelBegin(NostalgiaGraphic)
+	oxModelField(bpp)
+	oxModelField(rows)
+	oxModelField(columns)
+	oxModelField(defaultPalette)
+	oxModelField(pal)
+	oxModelField(pixels)
+oxModelEnd()
 
 struct Sprite {
 	unsigned idx = 0;