1 files changed, 96 insertions, 0 deletions
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.h b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.h
new file mode 100644
index 0000000000..03754d5e3b
--- /dev/null
+++ b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8.h
@@ -0,0 +1,96 @@
+/*
+ * 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_ETC1.h"
+
+namespace Etc
+{
+
+	class Block4x4Encoding_RGB8 : public Block4x4Encoding_ETC1
+	{
+	public:
+
+		Block4x4Encoding_RGB8(void);
+		virtual ~Block4x4Encoding_RGB8(void);
+
+		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 ColorFloatRGBA GetColor3(void) const
+		{
+			return m_frgbaColor3;
+		}
+
+	protected:
+
+		static const unsigned int PLANAR_CORNER_COLORS = 3;
+		static const unsigned int MAX_PLANAR_REGRESSION_SIZE = 4;
+		static const unsigned int TH_DISTANCES = 8;
+
+		static float s_afTHDistanceTable[TH_DISTANCES];
+
+		void TryPlanar(unsigned int a_uiRadius);
+		void TryTAndH(unsigned int a_uiRadius);
+
+		void InitFromEncodingBits_Planar(void);
+
+		ColorFloatRGBA	m_frgbaColor3;		// used for planar
+
+		void SetEncodingBits_T(void);
+		void SetEncodingBits_H(void);
+		void SetEncodingBits_Planar(void);
+
+		// state shared between iterations
+		ColorFloatRGBA	m_frgbaOriginalColor1_TAndH;
+		ColorFloatRGBA	m_frgbaOriginalColor2_TAndH;
+
+		void CalculateBaseColorsForTAndH(void);
+		void TryT(unsigned int a_uiRadius);
+		void TryT_BestSelectorCombination(void);
+		void TryH(unsigned int a_uiRadius);
+		void TryH_BestSelectorCombination(void);
+
+	private:
+
+		void InitFromEncodingBits_T(void);
+		void InitFromEncodingBits_H(void);
+
+		void CalculatePlanarCornerColors(void);
+
+		void ColorRegression(ColorFloatRGBA *a_pafrgbaPixels, unsigned int a_uiPixels,
+			ColorFloatRGBA *a_pfrgbaSlope, ColorFloatRGBA *a_pfrgbaOffset);
+
+		bool TwiddlePlanar(void);
+		bool TwiddlePlanarR();
+		bool TwiddlePlanarG();
+		bool TwiddlePlanarB();
+
+		void DecodePixels_T(void);
+		void DecodePixels_H(void);
+		void DecodePixels_Planar(void);
+
+	};
+
+} // namespace Etc