1 files changed, 128 insertions, 0 deletions
diff --git a/thirdparty/etc2comp/Etc.cpp b/thirdparty/etc2comp/Etc.cpp
new file mode 100644
index 0000000000..a5ee706048
--- /dev/null
+++ b/thirdparty/etc2comp/Etc.cpp
@@ -0,0 +1,128 @@
+/*
+ * 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.
+ */
+
+#include "EtcConfig.h"
+#include "Etc.h"
+#include "EtcFilter.h"
+
+#include <string.h>
+
+namespace Etc
+{
+	// ----------------------------------------------------------------------------------------------------
+	// C-style inteface to the encoder
+	//
+	void Encode(float *a_pafSourceRGBA,
+				unsigned int a_uiSourceWidth, 
+				unsigned int a_uiSourceHeight,
+				Image::Format a_format,
+				ErrorMetric a_eErrMetric,
+				float a_fEffort,
+				unsigned int a_uiJobs,
+				unsigned int a_uiMaxJobs,
+				unsigned char **a_ppaucEncodingBits,
+				unsigned int *a_puiEncodingBitsBytes,
+				unsigned int *a_puiExtendedWidth,
+				unsigned int *a_puiExtendedHeight, 
+				int *a_piEncodingTime_ms, bool a_bVerboseOutput)
+	{
+
+		Image image(a_pafSourceRGBA, a_uiSourceWidth,
+					a_uiSourceHeight,
+					a_eErrMetric);
+		image.m_bVerboseOutput = a_bVerboseOutput;
+		image.Encode(a_format, a_eErrMetric, a_fEffort, a_uiJobs, a_uiMaxJobs);
+
+		*a_ppaucEncodingBits = image.GetEncodingBits();
+		*a_puiEncodingBitsBytes = image.GetEncodingBitsBytes();
+		*a_puiExtendedWidth = image.GetExtendedWidth();
+		*a_puiExtendedHeight = image.GetExtendedHeight();
+		*a_piEncodingTime_ms = image.GetEncodingTimeMs();
+	}
+
+	void EncodeMipmaps(float *a_pafSourceRGBA,
+		unsigned int a_uiSourceWidth,
+		unsigned int a_uiSourceHeight,
+		Image::Format a_format,
+		ErrorMetric a_eErrMetric,
+		float a_fEffort,
+		unsigned int a_uiJobs,
+		unsigned int a_uiMaxJobs,
+		unsigned int a_uiMaxMipmaps,
+		unsigned int a_uiMipFilterFlags,
+		RawImage* a_pMipmapImages,
+		int *a_piEncodingTime_ms, 
+		bool a_bVerboseOutput)
+	{
+		auto mipWidth = a_uiSourceWidth;
+		auto mipHeight = a_uiSourceHeight;
+		int totalEncodingTime = 0;
+		for(unsigned int mip = 0; mip < a_uiMaxMipmaps && mipWidth >= 1 && mipHeight >= 1; mip++)
+		{
+			float* pImageData = nullptr;
+			float* pMipImage = nullptr;
+
+			if(mip == 0)
+			{
+				pImageData = a_pafSourceRGBA;
+			}
+			else
+			{
+				pMipImage = new float[mipWidth*mipHeight*4];
+				if(FilterTwoPass(a_pafSourceRGBA, a_uiSourceWidth, a_uiSourceHeight, pMipImage, mipWidth, mipHeight, a_uiMipFilterFlags, Etc::FilterLanczos3) )
+				{
+					pImageData = pMipImage;
+				}
+			}
+
+			if ( pImageData )
+			{
+			
+				Image image(pImageData, mipWidth, mipHeight,	a_eErrMetric);
+
+			image.m_bVerboseOutput = a_bVerboseOutput;
+			image.Encode(a_format, a_eErrMetric, a_fEffort, a_uiJobs, a_uiMaxJobs);
+
+			a_pMipmapImages[mip].paucEncodingBits = std::shared_ptr<unsigned char>(image.GetEncodingBits(), [](unsigned char *p) { delete[] p; });
+			a_pMipmapImages[mip].uiEncodingBitsBytes = image.GetEncodingBitsBytes();
+			a_pMipmapImages[mip].uiExtendedWidth = image.GetExtendedWidth();
+			a_pMipmapImages[mip].uiExtendedHeight = image.GetExtendedHeight();
+
+			totalEncodingTime += image.GetEncodingTimeMs();
+			}
+
+			if(pMipImage)
+			{
+				delete[] pMipImage;
+			}
+
+			if (!pImageData)
+			{
+				break;
+			}
+
+			mipWidth >>= 1;
+			mipHeight >>= 1;
+		}
+
+		*a_piEncodingTime_ms = totalEncodingTime;
+	}
+
+
+	// ----------------------------------------------------------------------------------------------------
+	//
+
+}