[nostalgia] Break part of core out into Turbine and TeaGBA libraries

deps/teagba/include/teagba/gfx.hpp

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#pragma once
+
+#include <ox/std/array.hpp>
+#include <ox/std/stddef.hpp>
+#include <ox/std/types.hpp>
+
+namespace teagba {
+
+enum DispCtl {
+	DispCtl_Mode0 = 0,
+	DispCtl_Mode1 = 1,
+	DispCtl_Mode2 = 2,
+	DispCtl_Mode3 = 3,
+	DispCtl_Mode4 = 4,
+	DispCtl_Mode5 = 5,
+
+	DispCtl_SpriteMap1D = 1 << 6,
+
+	DispCtl_Bg0 = 1 << 8,
+	DispCtl_Bg1 = 1 << 9,
+	DispCtl_Bg2 = 1 << 10,
+	DispCtl_Bg3 = 1 << 11,
+
+	DispCtl_Obj = 1 << 12,
+};
+
+struct OX_ALIGN8 GbaSpriteAttrUpdate {
+		uint16_t attr0 = 0;
+		uint16_t attr1 = 0;
+		uint16_t attr2 = 0;
+		uint16_t idx = 0;
+
+};
+
+extern volatile uint16_t g_spriteUpdates;
+extern ox::Array<GbaSpriteAttrUpdate, 128> g_spriteBuffer;
+
+void addSpriteUpdate(const GbaSpriteAttrUpdate &upd) noexcept;
+
+void applySpriteUpdates() noexcept;
+
+}