1 files changed, 70 insertions, 0 deletions
diff --git a/Runtime/GfxDevice/TextureIdMap.h b/Runtime/GfxDevice/TextureIdMap.h
new file mode 100644
index 0000000..9b1061c
--- /dev/null
+++ b/Runtime/GfxDevice/TextureIdMap.h
@@ -0,0 +1,70 @@
+#pragma once
+
+#include "Configuration/UnityConfigure.h"
+
+#include "Runtime/Utilities/dense_hash_map.h"
+#include "Runtime/Utilities/LogAssert.h"
+
+#include "Runtime/GfxDevice/GfxDeviceConfigure.h"
+#include "Runtime/GfxDevice/GfxDeviceTypes.h"
+
+class
+TextureIdMap
+{
+public:
+
+	static void Initialize();
+	static void Uninitialize();
+
+	static void UpdateTexture(TextureID texid, intptr_t nativeTex);
+	static void RemoveTexture(TextureID texid);
+
+	static intptr_t QueryNativeTexture(TextureID texid);
+
+
+private:
+
+	struct TextureIDHashFunctor
+	{
+		inline size_t operator()(TextureID x) const
+		{
+			UInt32 a = x.m_ID;
+			a = (a+0x7ed55d16) + (a<<12);
+			a = (a^0xc761c23c) ^ (a>>19);
+			a = (a+0x165667b1) + (a<<5);
+			a = (a+0xd3a2646c) ^ (a<<9);
+			a = (a+0xfd7046c5) + (a<<3);
+			a = (a^0xb55a4f09) ^ (a>>16);
+			return a;
+		}
+	};
+
+
+	typedef pair<const TextureID, intptr_t> TextureIdToTexturePair;
+	typedef dense_hash_map< TextureID, intptr_t, TextureIDHashFunctor, std::equal_to<TextureID>, STL_ALLOCATOR(kMemSTL, TextureIdToTexturePair) > TextureMap;
+
+	static TextureMap	s_Textures;
+
+	// some devices call OnCreate twice - easier to workaround here
+	static bool			s_Inited;
+};
+
+inline void TextureIdMap::UpdateTexture(TextureID texid, intptr_t nativeTex)
+{
+	TextureMap::iterator it = s_Textures.find(texid);
+	if(it != s_Textures.end())
+		it->second = nativeTex;
+	else
+		s_Textures.insert(std::make_pair(texid, nativeTex));
+}
+
+inline void TextureIdMap::RemoveTexture(TextureID texid)
+{
+	s_Textures.erase(texid);
+}
+
+inline intptr_t TextureIdMap::QueryNativeTexture(TextureID texid)
+{
+	TextureMap::iterator it = s_Textures.find(texid);
+	return it == s_Textures.end() ? 0 : it->second;
+}