Add some external dependencies.

extern/EtcLib/EtcCodec/EtcBlock4x4Encoding_R11.h

@@ -0,0 +1,122 @@
+/*
+ * Copyright 2015 The Etc2Comp Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "EtcBlock4x4Encoding_RGB8.h"
+
+namespace Etc
+{
+	class Block4x4EncodingBits_R11;
+
+	// ################################################################################
+	// Block4x4Encoding_R11
+	// ################################################################################
+
+	class Block4x4Encoding_R11 : public Block4x4Encoding_RGB8
+	{
+	public:
+
+		Block4x4Encoding_R11(void);
+		virtual ~Block4x4Encoding_R11(void);
+
+		virtual void InitFromSource(Block4x4 *a_pblockParent,
+			ColorFloatRGBA *a_pafrgbaSource,
+			unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric);
+
+		virtual void InitFromEncodingBits(Block4x4 *a_pblockParent,
+			unsigned char *a_paucEncodingBits,
+			ColorFloatRGBA *a_pafrgbaSource,
+			ErrorMetric a_errormetric);
+
+		virtual void PerformIteration(float a_fEffort);
+
+		virtual void SetEncodingBits(void);
+
+		inline float GetRedBase(void) const
+		{
+			return m_fRedBase;
+		}
+
+		inline float GetRedMultiplier(void) const
+		{
+			return m_fRedMultiplier;
+		}
+
+		inline int GetRedTableIndex(void) const
+		{
+			return m_uiRedModifierTableIndex;
+		}
+
+		inline const unsigned int * GetRedSelectors(void) const
+		{
+			return m_auiRedSelectors;
+		}
+
+	protected:
+
+		static const unsigned int MODIFIER_TABLE_ENTRYS = 16;
+		static const unsigned int SELECTOR_BITS = 3;
+		static const unsigned int SELECTORS = 1 << SELECTOR_BITS;
+
+		static float s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS];
+
+		void CalculateR11(unsigned int a_uiSelectorsUsed, 
+							float a_fBaseRadius, float a_fMultiplierRadius);
+
+		
+
+	
+		inline float DecodePixelRed(float a_fBase, float a_fMultiplier,
+			unsigned int a_uiTableIndex, unsigned int a_uiSelector)
+		{
+			float fMultiplier = a_fMultiplier;
+			if (fMultiplier <= 0.0f)
+			{
+				fMultiplier = 1.0f / 8.0f;
+			}
+
+			float fPixelRed = a_fBase * 8 + 4 +
+				8 * fMultiplier*s_aafModifierTable[a_uiTableIndex][a_uiSelector]*255;
+			fPixelRed /= 2047.0f;
+
+			if (fPixelRed < 0.0f)
+			{
+				fPixelRed = 0.0f;
+			}
+			else if (fPixelRed > 1.0f)
+			{
+				fPixelRed = 1.0f;
+			}
+
+			return fPixelRed;
+		}
+
+		Block4x4EncodingBits_R11 *m_pencodingbitsR11;
+
+		float m_fRedBase;
+		float m_fRedMultiplier;
+		float m_fRedBlockError;
+		unsigned int m_uiRedModifierTableIndex;
+		unsigned int m_auiRedSelectors[PIXELS];
+
+		
+	};
+
+	// ----------------------------------------------------------------------------------------------------
+	//
+
+} // namespace Etc