Fix changelog.

CMakeLists.txt

@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6.0)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.4.0)
 PROJECT(NV)
 ENABLE_TESTING()
 
@@ -16,13 +16,6 @@ MESSAGE(STATUS "Setting optimal options")
 MESSAGE(STATUS "  Processor: ${NV_SYSTEM_PROCESSOR}")
 MESSAGE(STATUS "  Compiler Flags: ${CMAKE_CXX_FLAGS}")
 
-IF(NVTT_SHARED)
-	SET(NVCORE_SHARED TRUE)
-	SET(NVMATH_SHARED TRUE)
-	SET(NVIMAGE_SHARED TRUE)
-ENDIF(NVTT_SHARED)
-
-
 ADD_SUBDIRECTORY(src)
 
 IF(WIN32)

ChangeLog

@@ -1,22 +1,3 @@
-NVIDIA Texture Tools version 2.0.5
- * Fix error in single color compressor. Fixes issue 66.
- * Detect mismatch between CUDA runtime and driver, and disable CUDA in that case.
- * Fix cmake files when compiling NVTT as a shared library.
- * When linking nvtt dynamically on unix, link all libraries dynamically.
- * Select fastest CUDA device.
-
-NVIDIA Texture Tools version 2.0.4
- * Fix error in RGB format output; reported by jonsoh. See issue 49.
- * Added support RGB format dithering by jonsoh. Fixes issue 50 and 51.
- * Prevent infinite loop in indexMirror when width equal 1. Fixes issue 65.
- * Implement general scale filter, including upsampling.
-
-NVIDIA Texture Tools version 2.0.3
- * More accurate DXT3 compressor. Fixes issue 38.
- * Remove legacy compressors. Fix issue 34.
- * Check for single color in all compressors. Fixes issue 43.
- * Fix error in fast downsample filter, reported by Noel Llopis.
-
 NVIDIA Texture Tools version 2.0.2
  * Fix copy ctor error reported by Richard Sim.
  * Fix indexMirror error reported by Chris Lambert.

VERSION

@@ -1 +1 @@
-2.0.5
+2.0.2

cmake/FindCUDA.cmake

@@ -57,7 +57,7 @@ MARK_AS_ADVANCED (CUDA_FOUND CUDA_COMPILER CUDA_RUNTIME_LIBRARY)
 
 
 #SET(CUDA_OPTIONS "-ncfe")
-SET(CUDA_OPTIONS "--host-compilation=C")
+SET(CUDA_OPTIONS "")
 
 IF (CUDA_EMULATION)
 	SET (CUDA_OPTIONS "${CUDA_OPTIONS} -deviceemu")

configure

@@ -53,7 +53,7 @@ echo "-- Configuring nvidia-texture-tools "`cat VERSION`
 
 mkdir -p ./build
 cd ./build
-$CMAKE .. -DNVTT_SHARED=1 -DCMAKE_BUILD_TYPE=$build -DCMAKE_INSTALL_PREFIX=$prefix -G "Unix Makefiles" || exit 1
+$CMAKE .. -DCMAKE_BUILD_TYPE=$build -DCMAKE_INSTALL_PREFIX=$prefix -G "Unix Makefiles" || exit 1
 cd ..
 
 echo ""

project/vc8/nvcore/nvcore.vcproj

@@ -281,10 +281,6 @@
 				RelativePath="..\..\..\src\nvcore\Debug.cpp"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\src\nvcore\Library.cpp"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\src\nvcore\Memory.cpp"
 				>
@@ -319,10 +315,6 @@
 				RelativePath="..\..\..\src\nvcore\DefsVcWin32.h"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\src\nvcore\Library.h"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\src\nvcore\Memory.h"
 				>

project/vc8/nvimage/nvimage.vcproj

@@ -355,10 +355,6 @@
 				RelativePath="..\..\..\src\nvimage\nvimage.h"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\src\nvimage\PixelFormat.h"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\src\nvimage\PsdFile.h"
 				>

project/vc8/nvtt/nvtt.rc

@@ -53,8 +53,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 2,0,5,0
+ FILEVERSION 2,0,2,0
- PRODUCTVERSION 2,0,5,0
+ PRODUCTVERSION 2,0,2,0
  FILEFLAGSMASK 0x17L
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -71,12 +71,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "NVIDIA Corporation"
             VALUE "FileDescription", "NVIDIA Texture Tools Dynamic Link Library"
-            VALUE "FileVersion", "2, 0, 5, 0"
+            VALUE "FileVersion", "2, 0, 2, 0"
             VALUE "InternalName", "nvtt"
             VALUE "LegalCopyright", "Copyright (C) 2007"
             VALUE "OriginalFilename", "nvtt.dll"
             VALUE "ProductName", "NVIDIA Texture Tools Dynamic Link Library"
-            VALUE "ProductVersion", "2, 0, 5, 0"
+            VALUE "ProductVersion", "2, 0, 2, 0"
         END
     END
     BLOCK "VarFileInfo"

project/vc8/nvtt/nvtt.vcproj

@@ -711,7 +711,7 @@
 					>
 					<Tool
 						Name="VCCustomBuildTool"
-						CommandLine="&quot;$(CUDA_BIN_PATH)\nvcc.exe&quot; -m32 -ccbin &quot;$(VCInstallDir)bin&quot; -c -DNDEBUG -DWIN32 -D_CONSOLE -D_MBCS -Xcompiler /EHsc,/W3,/nologo,/Wp64,/O2,/Zi,/MD -I&quot;$(CUDA_INC_PATH)&quot; -I./ -o $(IntDir)\$(InputName).obj ..\\..\\..\\src\\nvtt\\cuda\\CompressKernel.cu&#x0D;&#x0A;"
+						CommandLine="&quot;$(CUDA_BIN_PATH)\nvcc.exe&quot; -m32 -ccbin &quot;$(VCInstallDir)bin&quot; -c -DNDEBUG -DWIN32 -D_CONSOLE -D_MBCS -Xcompiler /EHsc,/W3,/nologo,/Wp64,/O2,/Zi,/MD -I&quot;$(CUDA_INC_PATH)&quot; -I./ -o $(IntDir)\$(InputName).obj ..\\..\\..\\src\\nvtt\\cuda\\CompressKernel.cu"
 						AdditionalDependencies="CudaMath.h"
 						Outputs="$(IntDir)\$(InputName).obj"
 					/>
@@ -849,6 +849,10 @@
 				RelativePath="..\..\..\src\nvtt\cuda\CudaUtils.cpp"
 				>
 			</File>
+			<File
+				RelativePath="..\..\..\src\nvtt\FastCompressDXT.cpp"
+				>
+			</File>
 			<File
 				RelativePath="..\..\..\src\nvtt\InputOptions.cpp"
 				>
@@ -861,10 +865,6 @@
 				RelativePath="..\..\..\src\nvtt\nvtt_wrapper.cpp"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\src\nvtt\OptimalCompressDXT.cpp"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\src\nvtt\OutputOptions.cpp"
 				>
@@ -911,6 +911,10 @@
 				RelativePath="..\..\..\src\nvtt\cuda\CudaUtils.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\..\src\nvtt\FastCompressDXT.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\..\src\nvtt\InputOptions.h"
 				>
@@ -923,10 +927,6 @@
 				RelativePath="..\..\..\src\nvtt\nvtt_wrapper.h"
 				>
 			</File>
-			<File
-				RelativePath="..\..\..\src\nvtt\OptimalCompressDXT.h"
-				>
-			</File>
 			<File
 				RelativePath="..\..\..\src\nvtt\OutputOptions.h"
 				>

src/nvcore/CMakeLists.txt

@@ -19,19 +19,13 @@ SET(CORE_SRCS
 	TextWriter.h
 	TextWriter.cpp
 	Radix.h
-	Radix.cpp
+	Radix.cpp)
-	Library.h
-	Library.cpp)
 
 INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 
 # targets
 ADD_DEFINITIONS(-DNVCORE_EXPORTS)
 
-IF(UNIX)
-	SET(LIBS ${LIBS} ${CMAKE_DL_LIBS})
-ENDIF(UNIX)
-
 IF(NVCORE_SHARED)
 	ADD_LIBRARY(nvcore SHARED ${CORE_SRCS})
 ELSE(NVCORE_SHARED)

src/nvcore/Debug.cpp

@@ -28,7 +28,7 @@
 #endif
 
 #if NV_OS_LINUX && defined(HAVE_EXECINFO_H)
-#	include <execinfo.h> // backtrace
+#	include <execinfo.h>
 #	if NV_CC_GNUC // defined(HAVE_CXXABI_H)
 #		include <cxxabi.h>
 #	endif
@@ -39,13 +39,6 @@
 #	include <sys/types.h>
 #	include <sys/sysctl.h>	// sysctl
 #	include <ucontext.h>
-#	undef HAVE_EXECINFO_H
-#	if defined(HAVE_EXECINFO_H) // only after OSX 10.5
-#		include <execinfo.h> // backtrace
-#		if NV_CC_GNUC // defined(HAVE_CXXABI_H)
-#			include <cxxabi.h>
-#		endif
-#	endif
 #endif
 
 #include <stdexcept> // std::runtime_error
@@ -135,10 +128,6 @@ namespace
 
 #if defined(HAVE_EXECINFO_H) // NV_OS_LINUX
 
-	static bool nvHasStackTrace() {
-		return backtrace != NULL;
-	}
-
 	static void nvPrintStackTrace(void * trace[], int size, int start=0) {
 		char ** string_array = backtrace_symbols(trace, size);
 	
@@ -177,36 +166,24 @@ namespace
 
 	static void * callerAddress(void * secret)
 	{
-#	if NV_OS_DARWIN
+#	if NV_OS_DARWIN && NV_CPU_PPC
-#		if defined(_STRUCT_MCONTEXT)
+		ucontext_t * ucp = (ucontext_t *)secret;
-#			if NV_CPU_PPC
+        return (void *) ucp->uc_mcontext->ss.srr0;
-				ucontext_t * ucp = (ucontext_t *)secret;
+#	elif NV_OS_DARWIN && NV_CPU_X86
-				return (void *) ucp->uc_mcontext->__ss.__srr0;
+		ucontext_t * ucp = (ucontext_t *)secret;
-#			elif NV_CPU_X86
+        return (void *) ucp->uc_mcontext->ss.eip;
-				ucontext_t * ucp = (ucontext_t *)secret;
+#	elif NV_CPU_X86_64
-				return (void *) ucp->uc_mcontext->__ss.__eip;
+		// #define REG_RIP REG_INDEX(rip) // seems to be 16
-#			endif
+		ucontext_t * ucp = (ucontext_t *)secret;
-#		else
+		return (void *)ucp->uc_mcontext.gregs[REG_RIP];
-#			if NV_CPU_PPC
+#	elif NV_CPU_X86
-				ucontext_t * ucp = (ucontext_t *)secret;
+		ucontext_t * ucp = (ucontext_t *)secret;
-				return (void *) ucp->uc_mcontext->ss.srr0;
+		return (void *)ucp->uc_mcontext.gregs[14/*REG_EIP*/];
-#			elif NV_CPU_X86
+#	elif NV_CPU_PPC
-				ucontext_t * ucp = (ucontext_t *)secret;
+		ucontext_t * ucp = (ucontext_t *)secret;
-				return (void *) ucp->uc_mcontext->ss.eip;
+		return (void *) ucp->uc_mcontext.regs->nip;
-#			endif
-#		endif
 #	else
-#		if NV_CPU_X86_64
+		return NULL;
-			// #define REG_RIP REG_INDEX(rip) // seems to be 16
-			ucontext_t * ucp = (ucontext_t *)secret;
-			return (void *)ucp->uc_mcontext.gregs[REG_RIP];
-#		elif NV_CPU_X86
-			ucontext_t * ucp = (ucontext_t *)secret;
-			return (void *)ucp->uc_mcontext.gregs[14/*REG_EIP*/];
-#		elif NV_CPU_PPC
-			ucontext_t * ucp = (ucontext_t *)secret;
-			return (void *) ucp->uc_mcontext.regs->nip;
-#		endif
 #	endif
 		
 		// How to obtain the instruction pointers in different platforms, from mlton's source code.
@@ -251,18 +228,17 @@ namespace
 		}
 		
 #	if defined(HAVE_EXECINFO_H)
-		if (nvHasStackTrace()) // in case of weak linking
-		{
-			void * trace[64];
-			int size = backtrace(trace, 64);
 		
-			if (pnt != NULL) {
+		void * trace[64];
-				// Overwrite sigaction with caller's address.
+		int size = backtrace(trace, 64);
-				trace[1] = pnt;
+		
-			}
+		if (pnt != NULL) {
-			
+			// Overwrite sigaction with caller's address.
-			nvPrintStackTrace(trace, size, 1);
+			trace[1] = pnt;
 		}
+		
+		nvPrintStackTrace(trace, size, 1);
+		
 #	endif // defined(HAVE_EXECINFO_H)
 		
 		exit(0);
@@ -397,12 +373,9 @@ namespace
 #		endif
 
 #		if defined(HAVE_EXECINFO_H)
-			if (nvHasStackTrace())
+			void * trace[64];
-			{
+			int size = backtrace(trace, 64);
-				void * trace[64];
+			nvPrintStackTrace(trace, size, 3);
-				int size = backtrace(trace, 64);
-				nvPrintStackTrace(trace, size, 3);
-			}
 #		endif
 
 			// Exit cleanly.
@@ -449,12 +422,9 @@ void NV_CDECL nvDebug(const char *msg, ...)
 void debug::dumpInfo()
 {
 #if !NV_OS_WIN32 && defined(HAVE_SIGNAL_H) && defined(HAVE_EXECINFO_H)
-	if (nvHasStackTrace())
+	void * trace[64];
-	{
+	int size = backtrace(trace, 64);
-		void * trace[64];
+	nvPrintStackTrace(trace, size, 1);
-		int size = backtrace(trace, 64);
-		nvPrintStackTrace(trace, size, 1);
-	}
 #endif
 }
 

src/nvcore/DefsGnucDarwin.h

@@ -2,7 +2,8 @@
 #error "Do not include this file directly."
 #endif
 
-#include <stdint.h> // uint8_t, int8_t, ...
+#include <stdlib.h>	// uint8_t, int8_t, ...
+
 
 // Function linkage
 #define DLL_IMPORT

src/nvcore/DefsVcWin32.h

@@ -19,9 +19,7 @@
 
 // Set standard function names.
 #define snprintf _snprintf
-#if _MSC_VER < 1500
+#define vsnprintf _vsnprintf
-#	define vsnprintf _vsnprintf
-#endif
 #define vsscanf _vsscanf
 #define chdir _chdir
 #define getcwd _getcwd 

src/nvcore/Library.cpp

@@ -1,41 +0,0 @@
-
-#include "Library.h"
-#include "Debug.h"
-
-#if NV_OS_WIN32
-#define WIN32_LEAN_AND_MEAN
-#define VC_EXTRALEAN
-#include <windows.h>
-#else
-#include <dlfcn.h>
-#endif
-
-
-
-void * nvLoadLibrary(const char * name)
-{
-#if NV_OS_WIN32
-	return (void *)LoadLibraryExA( name, NULL, 0 );
-#else
-	return dlopen(name, RTLD_LAZY);
-#endif
-}
-
-void nvUnloadLibrary(void * handle)
-{
-	nvDebugCheck(handle != NULL);
-#if NV_OS_WIN32
-	FreeLibrary((HMODULE)handle);
-#else
-	dlclose(handle);
-#endif
-}
-
-void * nvBindSymbol(void * handle, const char * symbol)
-{
-#if NV_OS_WIN32
-	return (void *)GetProcAddress((HMODULE)handle, symbol);
-#else
-	return (void *)dlsym(handle, symbol);
-#endif	
-}

src/nvcore/Library.h

@@ -1,50 +0,0 @@
-// This code is in the public domain -- castano@gmail.com
-
-#ifndef NV_CORE_LIBRARY_H
-#define NV_CORE_LIBRARY_H
-
-#include <nvcore/nvcore.h>
-
-#if NV_OS_WIN32
-#define LIBRARY_NAME(name)	#name ".dll"
-#elif NV_OS_DARWIN
-#define NV_LIBRARY_NAME(name)	"lib" #name ".dylib"
-#else
-#define NV_LIBRARY_NAME(name)	"lib" #name ".so"
-#endif
-
-NVCORE_API void * nvLoadLibrary(const char * name);
-NVCORE_API void nvUnloadLibrary(void * lib);
-NVCORE_API void * nvBindSymbol(void * lib, const char * symbol);
-
-class NVCORE_CLASS Library
-{
-public:
-	Library(const char * name)
-	{
-		handle = nvLoadLibrary(name);
-	}
-	~Library()
-	{
-		if (isValid())
-		{
-			nvUnloadLibrary(handle);
-		}
-	}
-	
-	bool isValid() const
-	{
-		return handle != NULL;
-	}
-	
-	void * bindSymbol(const char * symbol)
-	{
-		return nvBindSymbol(handle, symbol);
-	}
-	
-private:
-	void * handle;
-};
-
-
-#endif // NV_CORE_LIBRARY_H

src/nvcore/Prefetch.h

@@ -24,7 +24,7 @@ __forceinline void nvPrefetch(const void * mem)
 #else // NV_CC_MSVC
 
 // do nothing in other case.
-#define nvPrefetch(ptr)
+#define piPrefetch(ptr)
 
 #endif // NV_CC_MSVC
 

src/nvcore/Ptr.h

@@ -43,11 +43,8 @@ public:
 
 	/** Delete owned pointer and assign new one. */
 	void operator=( T * p ) {
-		if (p != m_ptr)
+		delete m_ptr;
-		{
+		m_ptr = p;
-			delete m_ptr;
-			m_ptr = p;
-		}
 	}
 
 	/** Member access. */
@@ -252,14 +249,14 @@ public:
 		/** -> operator. */
 		BaseClass * operator -> () const
 		{
-			nvCheck( m_ptr != NULL );
+			piCheck( m_ptr != NULL );
 			return m_ptr;
 		}
 
 		/** * operator. */
 		BaseClass & operator*() const
 		{
-			nvCheck( m_ptr != NULL );
+			piCheck( m_ptr != NULL );
 			return *m_ptr;
 		}
 

src/nvcore/StrLib.h

@@ -14,7 +14,7 @@ namespace nv
 
 	uint strHash(const char * str, uint h) NV_PURE;
 
-	/// String hash based on Bernstein's hash.
+	/// String hash vased on Bernstein's hash.
 	inline uint strHash(const char * data, uint h = 5381)
 	{
 		uint i;
@@ -213,12 +213,9 @@ namespace nv
 		/// Implement value semantics.
 		String & operator=( const String & str )
 		{
-			if (str.data != data)
+			release();
-			{
+			data = str.data;
-				release();
+			addRef();
-				data = str.data;
-				addRef();
-			}
 			return *this;
 		}
 

src/nvimage/DirectDrawSurface.cpp

@@ -532,7 +532,7 @@ DDSHeader::DDSHeader()
 
 	// Store version information on the reserved header attributes.
 	this->reserved[9] = MAKEFOURCC('N', 'V', 'T', 'T');
-	this->reserved[10] = (2 << 16) | (0 << 8) | (5);	// major.minor.revision
+	this->reserved[10] = (2 << 16) | (0 << 8) | (2);	// major.minor.revision
 
 	this->pf.size = 32;
 	this->pf.flags = 0;

src/nvimage/Filter.cpp

@@ -26,10 +26,10 @@
  * http://www.xmission.com/~legalize/zoom.html
  * 
  * Reconstruction Filters in Computer Graphics
- * http://www.mentallandscape.com/Papers_siggraph88.pdf
+ * http://www.mentallandscape.com/Papers_siggraph88.pdf 
  *
  * More references:
- * http://www.worldserver.com/turk/computergraphics/ResamplingFilters.pdf
+ * http://www.worldserver.com/turk/computergraphics/ResamplingFilters.pdf 
  * http://www.dspguide.com/ch16.htm
  */
 
@@ -244,7 +244,7 @@ SincFilter::SincFilter(float w) : Filter(w) {}
 
 float SincFilter::evaluate(float x) const
 {
-	return sincf(PI * x);
+	return 0.0f;
 }
 
 
@@ -541,17 +541,12 @@ void Kernel2::initBlendedSobel(const Vector4 & scale)
 
 PolyphaseKernel::PolyphaseKernel(const Filter & f, uint srcLength, uint dstLength, int samples/*= 32*/)
 {
+	nvCheck(srcLength >= dstLength);	// @@ Upsampling not implemented!
 	nvDebugCheck(samples > 0);
-
+	
-	float scale = float(dstLength) / float(srcLength);
+	const float scale = float(dstLength) / float(srcLength);
 	const float iscale = 1.0f / scale;
 
-	if (scale > 1) {
-		// Upsampling.
-		samples = 1;
-		scale = 1;
-	}
-
 	m_length = dstLength;
 	m_width = f.width() * iscale;
 	m_windowSize = (int)ceilf(m_width * 2) + 1;
@@ -582,7 +577,6 @@ PolyphaseKernel::PolyphaseKernel(const Filter & f, uint srcLength, uint dstLengt
 			m_data[i * m_windowSize + j] /= total;
 		}
 	}
-
 }
 
 PolyphaseKernel::~PolyphaseKernel()

src/nvimage/FloatImage.cpp

@@ -376,7 +376,7 @@ FloatImage * FloatImage::fastDownSample() const
 	{
 		const uint n = w * h;
 		
-		if ((m_width * m_height) & 1)
+		if (n & 1)
 		{
 			const float scale = 1.0f / (2 * n + 1);
 			
@@ -540,18 +540,73 @@ FloatImage * FloatImage::fastDownSample() const
 	return dst_image.release();
 }
 
+/*
+/// Downsample applying a 1D kernel separately in each dimension.
+FloatImage * FloatImage::downSample(const Kernel1 & kernel, WrapMode wm) const
+{
+	const uint w = max(1, m_width / 2);
+	const uint h = max(1, m_height / 2);
+	
+	return downSample(kernel, w, h, wm);
+}
+
+
+/// Downsample applying a 1D kernel separately in each dimension.
+FloatImage * FloatImage::downSample(const Kernel1 & kernel, uint w, uint h, WrapMode wm) const
+{
+	nvCheck(!(kernel.windowSize() & 1));	// Make sure that kernel m_width is even.
+
+	AutoPtr<FloatImage> tmp_image( new FloatImage() );
+	tmp_image->allocate(m_componentNum, w, m_height);
+	
+	AutoPtr<FloatImage> dst_image( new FloatImage() );	
+	dst_image->allocate(m_componentNum, w, h);
+	
+	const float xscale = float(m_width) / float(w);
+	const float yscale = float(m_height) / float(h);
+	
+	for(uint c = 0; c < m_componentNum; c++) {
+		float * tmp_channel = tmp_image->channel(c);
+		
+		for(uint y = 0; y < m_height; y++) {
+			for(uint x = 0; x < w; x++) {
+				
+				float sum = this->applyKernelHorizontal(&kernel, uint(x*xscale), y, c, wm);
+				
+				const uint tmp_index = tmp_image->index(x, y);
+				tmp_channel[tmp_index] = sum;
+			}
+		}
+		
+		float * dst_channel = dst_image->channel(c);
+		
+		for(uint y = 0; y < h; y++) {
+			for(uint x = 0; x < w; x++) {
+				
+				float sum = tmp_image->applyKernelVertical(&kernel, uint(x*xscale), uint(y*yscale), c, wm);
+				
+				const uint dst_index = dst_image->index(x, y);
+				dst_channel[dst_index] = sum;
+			}
+		}
+	}
+	
+	return dst_image.release();
+}
+*/
+
 /// Downsample applying a 1D kernel separately in each dimension.
 FloatImage * FloatImage::downSample(const Filter & filter, WrapMode wm) const
 {
 	const uint w = max(1, m_width / 2);
 	const uint h = max(1, m_height / 2);
 
-	return resize(filter, w, h, wm);
+	return downSample(filter, w, h, wm);
 }
 
 
 /// Downsample applying a 1D kernel separately in each dimension.
-FloatImage * FloatImage::resize(const Filter & filter, uint w, uint h, WrapMode wm) const
+FloatImage * FloatImage::downSample(const Filter & filter, uint w, uint h, WrapMode wm) const
 {
 	// @@ Use monophase filters when frac(m_width / w) == 0
 

src/nvimage/FloatImage.h

@@ -63,7 +63,7 @@ public:
 	
 	NVIMAGE_API FloatImage * fastDownSample() const;
 	NVIMAGE_API FloatImage * downSample(const Filter & filter, WrapMode wm) const;
-	NVIMAGE_API FloatImage * resize(const Filter & filter, uint w, uint h, WrapMode wm) const;
+	NVIMAGE_API FloatImage * downSample(const Filter & filter, uint w, uint h, WrapMode wm) const;
 
 	//NVIMAGE_API FloatImage * downSample(const Kernel1 & filter, WrapMode wm) const;
 	//NVIMAGE_API FloatImage * downSample(const Kernel1 & filter, uint w, uint h, WrapMode wm) const;
@@ -226,15 +226,11 @@ inline uint FloatImage::indexRepeat(int x, int y) const
 
 inline uint FloatImage::indexMirror(int x, int y) const
 {
-	if (m_width == 1) x = 0;
-
 	x = abs(x);
 	while (x >= m_width) {
 		x = abs(m_width + m_width - x - 2);
 	}
 
-	if (m_height == 1) y = 0;
-	
 	y = abs(y);
 	while (y >= m_height) {
 		y = abs(m_height + m_height - y - 2);

src/nvimage/Quantize.cpp

@@ -16,7 +16,6 @@ http://www.efg2.com/Lab/Library/ImageProcessing/DHALF.TXT
 
 #include <nvimage/Image.h>
 #include <nvimage/Quantize.h>
-#include <nvimage/PixelFormat.h>
 
 using namespace nv;
 
@@ -48,20 +47,94 @@ void nv::Quantize::BinaryAlpha( Image * image, int alpha_threshold /*= 127*/ )
 // Simple quantization.
 void nv::Quantize::RGB16( Image * image )
 {
-	Truncate(image, 5, 6, 5, 8);
+	nvCheck(image != NULL);
+	
+	const uint w = image->width();
+	const uint h = image->height();
+	
+	for(uint y = 0; y < h; y++) {
+		for(uint x = 0; x < w; x++) {
+			
+			Color32 pixel32 = image->pixel(x, y);
+			
+			// Convert to 16 bit and back to 32 using regular bit expansion.
+			Color32 pixel16 = toColor32( toColor16(pixel32) );
+			
+			// Store color.
+			image->pixel(x, y) = pixel16;
+		}
+	}
 }
 
 // Alpha quantization.
 void nv::Quantize::Alpha4( Image * image )
 {
-	Truncate(image, 8, 8, 8, 4);
+	nvCheck(image != NULL);
+	
+	const uint w = image->width();
+	const uint h = image->height();
+	
+	for(uint y = 0; y < h; y++) {
+		for(uint x = 0; x < w; x++) {
+			
+			Color32 pixel = image->pixel(x, y);
+			
+			// Convert to 4 bit using regular bit expansion.
+			pixel.a = (pixel.a & 0xF0) | ((pixel.a & 0xF0) >> 4);
+			
+			// Store color.
+			image->pixel(x, y) = pixel;
+		}
+	}
 }
 
 
 // Error diffusion. Floyd Steinberg.
 void nv::Quantize::FloydSteinberg_RGB16( Image * image )
 {
-	FloydSteinberg(image, 5, 6, 5, 8);
+	nvCheck(image != NULL);
+	
+	const uint w = image->width();
+	const uint h = image->height();
+	
+	// @@ Use fixed point?
+	Vector3 * row0 = new Vector3[w+2];
+	Vector3 * row1 = new Vector3[w+2];
+	memset(row0, 0, sizeof(Vector3)*(w+2));
+	memset(row1, 0, sizeof(Vector3)*(w+2));
+	
+	for(uint y = 0; y < h; y++) {
+		for(uint x = 0; x < w; x++) {
+			
+			Color32 pixel32 = image->pixel(x, y);
+			
+			// Add error.	// @@ We shouldn't clamp here!
+			pixel32.r = clamp(int(pixel32.r) + int(row0[1+x].x()), 0, 255);
+			pixel32.g = clamp(int(pixel32.g) + int(row0[1+x].y()), 0, 255);
+			pixel32.b = clamp(int(pixel32.b) + int(row0[1+x].z()), 0, 255);
+			
+			// Convert to 16 bit. @@ Use regular clamp?
+			Color32 pixel16 = toColor32( toColor16(pixel32) );
+			
+			// Store color.
+			image->pixel(x, y) = pixel16;
+			
+			// Compute new error.
+			Vector3 diff(float(pixel32.r - pixel16.r), float(pixel32.g - pixel16.g), float(pixel32.b - pixel16.b));
+			
+			// Propagate new error.
+			row0[1+x+1] += 7.0f / 16.0f * diff;
+			row1[1+x-1] += 3.0f / 16.0f * diff;
+			row1[1+x+0] += 5.0f / 16.0f * diff;
+			row1[1+x+1] += 1.0f / 16.0f * diff;
+		}
+		
+		swap(row0, row1);
+		memset(row1, 0, sizeof(Vector3)*(w+2));
+	}
+	
+	delete [] row0;
+	delete [] row1;
 }
 
 
@@ -115,102 +188,47 @@ void nv::Quantize::FloydSteinberg_BinaryAlpha( Image * image, int alpha_threshol
 
 // Error diffusion. Floyd Steinberg.
 void nv::Quantize::FloydSteinberg_Alpha4( Image * image )
-{
-	FloydSteinberg(image, 8, 8, 8, 4);
-}
-
-
-void nv::Quantize::Truncate(Image * image, uint rsize, uint gsize, uint bsize, uint asize)
 {
 	nvCheck(image != NULL);
 	
 	const uint w = image->width();
 	const uint h = image->height();
 	
+	// @@ Use fixed point?
+	float * row0 = new float[(w+2)];
+	float * row1 = new float[(w+2)];
+	memset(row0, 0, sizeof(float)*(w+2));
+	memset(row1, 0, sizeof(float)*(w+2));
+	
 	for(uint y = 0; y < h; y++) {
 		for(uint x = 0; x < w; x++) {
 			
 			Color32 pixel = image->pixel(x, y);
-
+			
-			// Convert to our desired size, and reconstruct.
+			// Add error.
-			pixel.r = PixelFormat::convert(pixel.r, 8, rsize);
+			int alpha = int(pixel.a) + int(row0[1+x]);
-			pixel.r = PixelFormat::convert(pixel.r, rsize, 8);
+			
-
+			// Convert to 4 bit using regular bit expansion.
-			pixel.g = PixelFormat::convert(pixel.g, 8, gsize);
+			pixel.a = (pixel.a & 0xF0) | ((pixel.a & 0xF0) >> 4);
-			pixel.g = PixelFormat::convert(pixel.g, gsize, 8);
+			
-
-			pixel.b = PixelFormat::convert(pixel.b, 8, bsize);
-			pixel.b = PixelFormat::convert(pixel.b, bsize, 8);
-
-			pixel.a = PixelFormat::convert(pixel.a, 8, asize);
-			pixel.a = PixelFormat::convert(pixel.a, asize, 8);
-
 			// Store color.
 			image->pixel(x, y) = pixel;
+			
+			// Compute new error.
+			float diff = float(alpha - pixel.a);
+			
+			// Propagate new error.
+			row0[1+x+1] += 7.0f / 16.0f * diff;
+			row1[1+x-1] += 3.0f / 16.0f * diff;
+			row1[1+x+0] += 5.0f / 16.0f * diff;
+			row1[1+x+1] += 1.0f / 16.0f * diff;
 		}
+		
+		swap(row0, row1);
+		memset(row1, 0, sizeof(float)*(w+2));
 	}
+	
+	delete [] row0;
+	delete [] row1;
 }
 
-
-// Error diffusion. Floyd Steinberg.
-void nv::Quantize::FloydSteinberg(Image * image, uint rsize, uint gsize, uint bsize, uint asize)
-{
-	nvCheck(image != NULL);
-	
-	const uint w = image->width();
-	const uint h = image->height();
-	
-	Vector4 * row0 = new Vector4[w+2];
-	Vector4 * row1 = new Vector4[w+2];
-	memset(row0, 0, sizeof(Vector4)*(w+2));
-	memset(row1, 0, sizeof(Vector4)*(w+2));
-	
-	for (uint y = 0; y < h; y++) {
-		for (uint x = 0; x < w; x++) {
-			
-			Color32 pixel = image->pixel(x, y);
-
-			// Add error.
-			pixel.r = clamp(int(pixel.r) + int(row0[1+x].x()), 0, 255);
-			pixel.g = clamp(int(pixel.g) + int(row0[1+x].y()), 0, 255);
-			pixel.b = clamp(int(pixel.b) + int(row0[1+x].z()), 0, 255);
-			pixel.a = clamp(int(pixel.a) + int(row0[1+x].w()), 0, 255);
-			
-			int r = pixel.r;
-			int g = pixel.g;
-			int b = pixel.b;
-			int a = pixel.a;
-
-			// Convert to our desired size, and reconstruct.
-			r = PixelFormat::convert(r, 8, rsize);
-			r = PixelFormat::convert(r, rsize, 8);
-
-			g = PixelFormat::convert(g, 8, gsize);
-			g = PixelFormat::convert(g, gsize, 8);
-
-			b = PixelFormat::convert(b, 8, bsize);
-			b = PixelFormat::convert(b, bsize, 8);
-
-			a = PixelFormat::convert(a, 8, asize);
-			a = PixelFormat::convert(a, asize, 8);
-
-			// Store color.
-			image->pixel(x, y) = Color32(r, g, b, a);
-			
-			// Compute new error.
-			Vector4 diff(float(int(pixel.r) - r), float(int(pixel.g) - g), float(int(pixel.b) - b), float(int(pixel.a) - a));
-			
-			// Propagate new error.
-			row0[1+x+1] += 7.0f / 16.0f * diff;
-			row1[1+x-1] += 3.0f / 16.0f * diff;
-			row1[1+x+0] += 5.0f / 16.0f * diff;
-			row1[1+x+1] += 1.0f / 16.0f * diff;
-		}
-		
-		swap(row0, row1);
-		memset(row1, 0, sizeof(Vector4)*(w+2));
-	}
-	
-	delete [] row0;
-	delete [] row1;
-}

src/nvimage/Quantize.h

@@ -17,9 +17,6 @@ namespace nv
 		void FloydSteinberg_BinaryAlpha(Image * img, int alpha_threshold = 127);
 		void FloydSteinberg_Alpha4(Image * img);
 
-		void Truncate(Image * image, uint rsize, uint gsize, uint bsize, uint asize);
-		void FloydSteinberg(Image * image, uint rsize, uint gsize, uint bsize, uint asize);
-
 		// @@ Add palette quantization algorithms!
 	}
 }

src/nvmath/Box.h

@@ -108,7 +108,7 @@ public:
 	float area() const
 	{
 		const Vector3 d = extents();
-		return 8.0f * (d.x()*d.y() + d.x()*d.z() + d.y()*d.z());
+		return 4.0f * (d.x()*d.y() + d.x()*d.z() + d.y()*d.z());
 	}	
 
 	/// Get the volume of the box.
@@ -118,14 +118,6 @@ public:
 		return 8.0f * (d.x() * d.y() * d.z());
 	}
 	
-	/// Return true if the box contains the given point.
-	bool contains(Vector3::Arg p) const
-	{
-		return 
-			m_mins.x() < p.x() && m_mins.y() < p.y() && m_mins.z() < p.z() &&
-			m_maxs.x() > p.x() && m_maxs.y() > p.y() && m_maxs.z() > p.z();
-	}
-
 private:
 
 	Vector3 m_mins;
@@ -133,6 +125,15 @@ private:
 };
 
 
+/*
+/// Point inside box test.
+inline bool pointInsideBox(const Box & b, Vector3::Arg p) const
+{
+	return (m_mins.x() < p.x() && m_mins.y() < p.y() && m_mins.z() < p.z() &&
+		m_maxs.x() > p.x() && m_maxs.y() > p.y() && m_maxs.z() > p.z());
+}
+*/
+
 
 } // nv namespace
 

src/nvtt/CMakeLists.txt

@@ -13,10 +13,10 @@ SET(NVTT_SRCS
 	CompressDXT.cpp
 	CompressRGB.h
 	CompressRGB.cpp
+	FastCompressDXT.h
+	FastCompressDXT.cpp
 	QuickCompressDXT.h
 	QuickCompressDXT.cpp
-	OptimalCompressDXT.h
-	OptimalCompressDXT.cpp
 	SingleColorLookup.h
 	CompressionOptions.h
 	CompressionOptions.cpp
@@ -43,9 +43,8 @@ INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
 
 ADD_DEFINITIONS(-DNVTT_EXPORTS)
 
-IF(NVTT_SHARED)
+IF(NVTT_SHARED)	
-	ADD_DEFINITIONS(-DNVTT_SHARED=1)
+	ADD_LIBRARY(nvtt SHARED ${DXT_SRCS})
-	ADD_LIBRARY(nvtt SHARED ${NVTT_SRCS})
 ELSE(NVTT_SHARED)
 	ADD_LIBRARY(nvtt ${NVTT_SRCS})
 ENDIF(NVTT_SHARED)
@@ -85,7 +84,7 @@ TARGET_LINK_LIBRARIES(nvzoom nvcore nvmath nvimage)
 
 INSTALL(TARGETS nvcompress nvdecompress nvddsinfo nvimgdiff nvassemble nvzoom DESTINATION bin)
 
-# UI tools
+# UI tools
 IF(QT4_FOUND AND NOT MSVC)
 	SET(QT_USE_QTOPENGL TRUE)
 	INCLUDE_DIRECTORIES(${QT_INCLUDE_DIR} ${CMAKE_CURRENT_BINARY_DIR})
@@ -107,7 +106,7 @@ IF(QT4_FOUND AND NOT MSVC)
 
 	ADD_EXECUTABLE(nvcompressui MACOSX_BUNDLE ${SRCS} ${UICS} ${MOCS})
 	TARGET_LINK_LIBRARIES(nvcompressui ${LIBS})
-
+
 ENDIF(QT4_FOUND AND NOT MSVC)
 
 

src/nvtt/CompressDXT.cpp

@@ -29,8 +29,8 @@
 
 #include "nvtt.h"
 #include "CompressDXT.h"
+#include "FastCompressDXT.h"
 #include "QuickCompressDXT.h"
-#include "OptimalCompressDXT.h"
 #include "CompressionOptions.h"
 #include "OutputOptions.h"
 
@@ -57,33 +57,26 @@ using namespace nv;
 using namespace nvtt;
 
 
-nv::FastCompressor::FastCompressor() : m_image(NULL), m_alphaMode(AlphaMode_None)
+void nv::fastCompressDXT1(const Image * image, const OutputOptions::Private & outputOptions)
 {
-}
+	const uint w = image->width();
-
+	const uint h = image->height();
-nv::FastCompressor::~FastCompressor()
-{
-}
-
-void nv::FastCompressor::setImage(const Image * image, nvtt::AlphaMode alphaMode)
-{
-	m_image = image;
-	m_alphaMode = alphaMode;
-}
-
-void nv::FastCompressor::compressDXT1(const OutputOptions::Private & outputOptions)
-{
-	const uint w = m_image->width();
-	const uint h = m_image->height();
 	
 	ColorBlock rgba;
 	BlockDXT1 block;
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
-			QuickCompress::compressDXT1(rgba, &block);
+			if (rgba.isSingleColor())
+			{
+				QuickCompress::compressDXT1(rgba.color(0), &block);
+			}
+			else
+			{
+				QuickCompress::compressDXT1(rgba, &block);
+			}
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -93,19 +86,27 @@ void nv::FastCompressor::compressDXT1(const OutputOptions::Private & outputOptio
 }
 
 
-void nv::FastCompressor::compressDXT1a(const OutputOptions::Private & outputOptions)
+void nv::fastCompressDXT1a(const Image * image, const OutputOptions::Private & outputOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT1 block;
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
-			QuickCompress::compressDXT1a(rgba, &block);
+			// @@ We could do better here: check for single RGB, but varying alpha.
+			if (rgba.isSingleColor())
+			{
+				QuickCompress::compressDXT1a(rgba.color(0), &block);
+			}
+			else
+			{
+				QuickCompress::compressDXT1a(rgba, &block);
+			}
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -115,18 +116,17 @@ void nv::FastCompressor::compressDXT1a(const OutputOptions::Private & outputOpti
 }
 
 
-void nv::FastCompressor::compressDXT3(const nvtt::OutputOptions::Private & outputOptions)
+void nv::fastCompressDXT3(const Image * image, const nvtt::OutputOptions::Private & outputOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT3 block;
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
-
 			QuickCompress::compressDXT3(rgba, &block);
 			
 			if (outputOptions.outputHandler != NULL) {
@@ -137,19 +137,19 @@ void nv::FastCompressor::compressDXT3(const nvtt::OutputOptions::Private & outpu
 }
 
 
-void nv::FastCompressor::compressDXT5(const nvtt::OutputOptions::Private & outputOptions)
+void nv::fastCompressDXT5(const Image * image, const nvtt::OutputOptions::Private & outputOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT5 block;
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
-			
+			//QuickCompress::compressDXT5(rgba, &block);	// @@ Use fast version!!
-			QuickCompress::compressDXT5(rgba, &block, 0);
+			nv::compressBlock_BoundsRange(rgba, &block);
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -159,21 +159,23 @@ void nv::FastCompressor::compressDXT5(const nvtt::OutputOptions::Private & outpu
 }
 
 
-void nv::FastCompressor::compressDXT5n(const nvtt::OutputOptions::Private & outputOptions)
+void nv::fastCompressDXT5n(const Image * image, const nvtt::OutputOptions::Private & outputOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT5 block;
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
+			// copy X coordinate to alpha channel and Y coordinate to green channel.
 			rgba.swizzleDXT5n();
 
-			QuickCompress::compressDXT5(rgba, &block, 0);
+			//QuickCompress::compressDXT5(rgba, &block);	// @@ Use fast version!!
+			nv::compressBlock_BoundsRange(rgba, &block);
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -183,28 +185,42 @@ void nv::FastCompressor::compressDXT5n(const nvtt::OutputOptions::Private & outp
 }
 
 
-nv::SlowCompressor::SlowCompressor() : m_image(NULL), m_alphaMode(AlphaMode_None)
+void nv::fastCompressBC4(const Image * image, const nvtt::OutputOptions::Private & outputOptions)
 {
+	// @@ TODO
+	// compress red channel (X)
 }
 
-nv::SlowCompressor::~SlowCompressor()
+
+void nv::fastCompressBC5(const Image * image, const nvtt::OutputOptions::Private & outputOptions)
 {
+	// @@ TODO
+	// compress red, green channels (X,Y)
 }
 
-void nv::SlowCompressor::setImage(const Image * image, nvtt::AlphaMode alphaMode)
+
+void nv::doPrecomputation()
 {
-	m_image = image;
+	static bool done = false;	// @@ Stop using statics for reentrancy. Although the worst that could happen is that this stuff is precomputed multiple times.
-	m_alphaMode = alphaMode;
+	
+	if (!done)
+	{
+		done = true;
+		squish::FastClusterFit::DoPrecomputation();
+	}
 }
 
-void nv::SlowCompressor::compressDXT1(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+
+void nv::compressDXT1(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT1 block;
 
+	doPrecomputation();
+
 	//squish::WeightedClusterFit fit;
 	//squish::ClusterFit fit;
 	squish::FastClusterFit fit;
@@ -213,11 +229,11 @@ void nv::SlowCompressor::compressDXT1(const CompressionOptions::Private & compre
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
 			if (rgba.isSingleColor())
 			{
-				OptimalCompress::compressDXT1(rgba.color(0), &block);
+				QuickCompress::compressDXT1(rgba.color(0), &block);
 			}
 			else
 			{
@@ -234,10 +250,10 @@ void nv::SlowCompressor::compressDXT1(const CompressionOptions::Private & compre
 }
 
 
-void nv::SlowCompressor::compressDXT1a(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void nv::compressDXT1a(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT1 block;
@@ -248,20 +264,11 @@ void nv::SlowCompressor::compressDXT1a(const CompressionOptions::Private & compr
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
-			bool anyAlpha = false;
+			if (rgba.isSingleColor())
-			bool allAlpha = true;
-			
-			for (uint i = 0; i < 16; i++)
 			{
-				if (rgba.color(i).a < 128) anyAlpha = true;
+				QuickCompress::compressDXT1a(rgba.color(0), &block);
-				else allAlpha = false;
-			}
-			
-			if ((!anyAlpha && rgba.isSingleColor() || allAlpha))
-			{
-				OptimalCompress::compressDXT1a(rgba.color(0), &block);
 			}
 			else
 			{
@@ -278,37 +285,29 @@ void nv::SlowCompressor::compressDXT1a(const CompressionOptions::Private & compr
 }
 
 
-void nv::SlowCompressor::compressDXT3(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void nv::compressDXT3(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT3 block;
 	
 	squish::WeightedClusterFit fit;
-	//squish::FastClusterFit fit;
 	fit.SetMetric(compressionOptions.colorWeight.x(), compressionOptions.colorWeight.y(), compressionOptions.colorWeight.z());
 
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
 			// Compress explicit alpha.
-			OptimalCompress::compressDXT3A(rgba, &block.alpha);
+			QuickCompress::compressDXT3A(rgba, &block.alpha);
-
+			
 			// Compress color.
-			if (rgba.isSingleColor())
+			squish::ColourSet colours((uint8 *)rgba.colors(), squish::kWeightColourByAlpha);
-			{
+			fit.SetColourSet(&colours, 0);
-				OptimalCompress::compressDXT1(rgba.color(0), &block.color);
+			fit.Compress(&block.color);
-			}
-			else
-			{
-				squish::ColourSet colours((uint8 *)rgba.colors(), squish::kWeightColourByAlpha);
-				fit.SetColourSet(&colours, 0);
-				fit.Compress(&block.color);
-			}
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -317,10 +316,10 @@ void nv::SlowCompressor::compressDXT3(const CompressionOptions::Private & compre
 	}
 }
 
-void nv::SlowCompressor::compressDXT5(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void nv::compressDXT5(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT5 block;
@@ -331,29 +330,22 @@ void nv::SlowCompressor::compressDXT5(const CompressionOptions::Private & compre
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 
 			// Compress alpha.
 			if (compressionOptions.quality == Quality_Highest)
 			{
-				OptimalCompress::compressDXT5A(rgba, &block.alpha);
+				compressBlock_BruteForce(rgba, &block.alpha);
 			}
 			else
 			{
 				QuickCompress::compressDXT5A(rgba, &block.alpha);
 			}
-		
+
 			// Compress color.
-			if (rgba.isSingleColor())
+			squish::ColourSet colours((uint8 *)rgba.colors(), squish::kWeightColourByAlpha);
-			{
+			fit.SetColourSet(&colours, 0);
-				OptimalCompress::compressDXT1(rgba.color(0), &block.color);
+			fit.Compress(&block.color);
-			}
-			else
-			{
-				squish::ColourSet colours((uint8 *)rgba.colors(), squish::kWeightColourByAlpha);
-				fit.SetColourSet(&colours, 0);
-				fit.Compress(&block.color);
-			}
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -363,25 +355,28 @@ void nv::SlowCompressor::compressDXT5(const CompressionOptions::Private & compre
 }
 
 
-void nv::SlowCompressor::compressDXT5n(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void nv::compressDXT5n(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	BlockDXT5 block;
 	
+	doPrecomputation();
+
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 			
+			// copy X coordinate to green channel and Y coordinate to alpha channel.
 			rgba.swizzleDXT5n();			
 			
 			// Compress X.
 			if (compressionOptions.quality == Quality_Highest)
 			{
-				OptimalCompress::compressDXT5A(rgba, &block.alpha);
+				compressBlock_BruteForce(rgba, &block.alpha);
 			}
 			else
 			{
@@ -389,7 +384,7 @@ void nv::SlowCompressor::compressDXT5n(const CompressionOptions::Private & compr
 			}
 			
 			// Compress Y.
-			OptimalCompress::compressDXT1G(rgba, &block.color);
+			QuickCompress::compressDXT1G(rgba, &block.color);
 			
 			if (outputOptions.outputHandler != NULL) {
 				outputOptions.outputHandler->writeData(&block, sizeof(block));
@@ -399,10 +394,10 @@ void nv::SlowCompressor::compressDXT5n(const CompressionOptions::Private & compr
 }
 
 
-void nv::SlowCompressor::compressBC4(const CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions)
+void nv::compressBC4(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 	
 	ColorBlock rgba;
 	AlphaBlockDXT5 block;
@@ -410,11 +405,11 @@ void nv::SlowCompressor::compressBC4(const CompressionOptions::Private & compres
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			rgba.init(m_image, x, y);
+			rgba.init(image, x, y);
 
 			if (compressionOptions.quality == Quality_Highest)
 			{
-				OptimalCompress::compressDXT5A(rgba, &block);
+				compressBlock_BruteForce(rgba, &block);
 			}
 			else
 			{
@@ -429,10 +424,10 @@ void nv::SlowCompressor::compressBC4(const CompressionOptions::Private & compres
 }
 
 
-void nv::SlowCompressor::compressBC5(const CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions)
+void nv::compressBC5(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
-	const uint w = m_image->width();
+	const uint w = image->width();
-	const uint h = m_image->height();
+	const uint h = image->height();
 
 	ColorBlock xcolor;
 	ColorBlock ycolor;
@@ -442,16 +437,16 @@ void nv::SlowCompressor::compressBC5(const CompressionOptions::Private & compres
 	for (uint y = 0; y < h; y += 4) {
 		for (uint x = 0; x < w; x += 4) {
 			
-			xcolor.init(m_image, x, y);
+			xcolor.init(image, x, y);
 			xcolor.splatX();
 			
-			ycolor.init(m_image, x, y);
+			ycolor.init(image, x, y);
 			ycolor.splatY();
 
 			if (compressionOptions.quality == Quality_Highest)
 			{
-				OptimalCompress::compressDXT5A(xcolor, &block.x);
+				compressBlock_BruteForce(xcolor, &block.x);
-				OptimalCompress::compressDXT5A(ycolor, &block.y);
+				compressBlock_BruteForce(ycolor, &block.y);
 			}
 			else
 			{

src/nvtt/CompressDXT.h

@@ -32,46 +32,26 @@ namespace nv
 	class Image;
 	class FloatImage;
 
-	class FastCompressor
+	void doPrecomputation();
-	{
+	
-	public:
+	// Fast compressors.
-		FastCompressor();
+	void fastCompressDXT1(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-		~FastCompressor();
+	void fastCompressDXT1a(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-
+	void fastCompressDXT3(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-		void setImage(const Image * image, nvtt::AlphaMode alphaMode);
+	void fastCompressDXT5(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-
+	void fastCompressDXT5n(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT1(const nvtt::OutputOptions::Private & outputOptions);
+	void fastCompressBC4(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT1a(const nvtt::OutputOptions::Private & outputOptions);
+	void fastCompressBC5(const Image * image, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT3(const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT5(const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT5n(const nvtt::OutputOptions::Private & outputOptions);
-
-	private:
-		const Image * m_image;
-		nvtt::AlphaMode m_alphaMode;
-	};
-
-	class SlowCompressor
-	{
-	public:
-		SlowCompressor();
-		~SlowCompressor();
-
-		void setImage(const Image * image, nvtt::AlphaMode alphaMode);
-
-		void compressDXT1(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT1a(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT3(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT5(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT5n(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressBC4(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressBC5(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-
-	private:
-		const Image * m_image;
-		nvtt::AlphaMode m_alphaMode;
-	};
 
+	// Normal compressors.
+	void compressDXT1(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressDXT1a(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressDXT3(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressDXT5(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressDXT5n(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressBC4(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	void compressBC5(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
+	
 	// External compressors.
 #if defined(HAVE_S3QUANT)
 	void s3CompressDXT1(const Image * image, const nvtt::OutputOptions::Private & outputOptions);

src/nvtt/CompressRGB.cpp

@@ -123,7 +123,7 @@ void nv::compressRGB(const Image * image, const OutputOptions::Private & outputO
 			}
 			
 			// Zero padding.
-			for (uint x = w * byteCount; x < pitch; x++)
+			for (uint x = w; x < pitch; x++)
 			{
 				*(dst + x) = 0;
 			}

src/nvtt/Compressor.cpp

@@ -34,7 +34,6 @@
 #include <nvimage/Filter.h>
 #include <nvimage/Quantize.h>
 #include <nvimage/NormalMap.h>
-#include <nvimage/PixelFormat.h>
 
 #include "Compressor.h"
 #include "InputOptions.h"
@@ -42,6 +41,7 @@
 #include "OutputOptions.h"
 
 #include "CompressDXT.h"
+#include "FastCompressDXT.h"
 #include "CompressRGB.h"
 #include "cuda/CudaUtils.h"
 #include "cuda/CudaCompressDXT.h"
@@ -200,7 +200,7 @@ namespace nvtt
 		AutoPtr<FloatImage> m_floatImage;
 	};
 
-} // nvtt namespace
+}
 
 
 Compressor::Compressor() : m(*new Compressor::Private())
@@ -211,10 +211,6 @@ Compressor::Compressor() : m(*new Compressor::Private())
 
 	if (m.cudaEnabled)
 	{
-		// Select fastest CUDA device.
-		int device = cuda::getFastestDevice();
-		cuda::setDevice(device);
-		
 		m.cuda = new CudaCompressor();
 
 		if (!m.cuda->isValid())
@@ -241,10 +237,6 @@ void Compressor::enableCudaAcceleration(bool enable)
 
 	if (m.cudaEnabled && m.cuda == NULL)
 	{
-		// Select fastest CUDA device.
-		int device = cuda::getFastestDevice();
-		cuda::setDevice(device);
-		
 		m.cuda = new CudaCompressor();
 		
 		if (!m.cuda->isValid())
@@ -430,7 +422,7 @@ bool Compressor::Private::compressMipmaps(uint f, const InputOptions::Private &
 		
 		quantizeMipmap(mipmap, compressionOptions);
 
-		compressMipmap(mipmap, inputOptions, compressionOptions, outputOptions);
+		compressMipmap(mipmap, compressionOptions, outputOptions);
 
 		// Compute extents of next mipmap:
 		w = max(1U, w / 2);
@@ -579,7 +571,7 @@ void Compressor::Private::scaleMipmap(Mipmap & mipmap, const InputOptions::Priva
 
 	// Resize image. 
 	BoxFilter boxFilter;
-	mipmap.setImage(mipmap.asFloatImage()->resize(boxFilter, w, h, (FloatImage::WrapMode)inputOptions.wrapMode));
+	mipmap.setImage(mipmap.asFloatImage()->downSample(boxFilter, w, h, (FloatImage::WrapMode)inputOptions.wrapMode));
 }
 
 
@@ -626,6 +618,13 @@ void Compressor::Private::quantizeMipmap(Mipmap & mipmap, const CompressionOptio
 {
 	nvDebugCheck(mipmap.asFixedImage() != NULL);
 
+	if (compressionOptions.enableColorDithering)
+	{
+		if (compressionOptions.format >= Format_DXT1 && compressionOptions.format <= Format_DXT5)
+		{
+			Quantize::FloydSteinberg_RGB16(mipmap.asMutableFixedImage());
+		}
+	}
 	if (compressionOptions.binaryAlpha)
 	{
 		if (compressionOptions.enableAlphaDithering)
@@ -637,67 +636,30 @@ void Compressor::Private::quantizeMipmap(Mipmap & mipmap, const CompressionOptio
 			Quantize::BinaryAlpha(mipmap.asMutableFixedImage(), compressionOptions.alphaThreshold);
 		}
 	}
-
+	else
-	if (compressionOptions.enableColorDithering || compressionOptions.enableAlphaDithering)
 	{
-		uint rsize = 8;
-		uint gsize = 8;
-		uint bsize = 8;
-		uint asize = 8;
-
-		if (compressionOptions.enableColorDithering)
-		{
-			if (compressionOptions.format >= Format_DXT1 && compressionOptions.format <= Format_DXT5)
-			{
-				rsize = 5;
-				gsize = 6;
-				bsize = 5;
-			}
-			else if (compressionOptions.format == Format_RGB)
-			{
-				uint rshift, gshift, bshift;
-				PixelFormat::maskShiftAndSize(compressionOptions.rmask, &rshift, &rsize);
-				PixelFormat::maskShiftAndSize(compressionOptions.gmask, &gshift, &gsize);
-				PixelFormat::maskShiftAndSize(compressionOptions.bmask, &bshift, &bsize);
-			}
-		}
-
 		if (compressionOptions.enableAlphaDithering)
 		{
 			if (compressionOptions.format == Format_DXT3)
 			{
-				asize = 4;
+				Quantize::Alpha4(mipmap.asMutableFixedImage());
 			}
-			else if (compressionOptions.format == Format_RGB)
+			else if (compressionOptions.format == Format_DXT1a)
 			{
-				uint ashift;
+				Quantize::BinaryAlpha(mipmap.asMutableFixedImage(), compressionOptions.alphaThreshold);
-				PixelFormat::maskShiftAndSize(compressionOptions.amask, &ashift, &asize);
 			}
 		}
-
-		if (compressionOptions.binaryAlpha)
-		{
-			asize = 8; // Already quantized.
-		}
-
-		Quantize::FloydSteinberg(mipmap.asMutableFixedImage(), rsize, gsize, bsize, asize);
 	}
 }
 
 
 // Compress the given mipmap.
-bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptions::Private & inputOptions, const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions) const
+bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions) const
 {
 	const Image * image = mipmap.asFixedImage();
+
 	nvDebugCheck(image != NULL);
 
-	FastCompressor fast;
-	fast.setImage(image, inputOptions.alphaMode);
-
-	SlowCompressor slow;
-	slow.setImage(image, inputOptions.alphaMode);
-
-
 	if (compressionOptions.format == Format_RGBA || compressionOptions.format == Format_RGB)
 	{
 		compressRGB(image, outputOptions, compressionOptions);
@@ -721,19 +683,18 @@ bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptio
 #endif
 		if (compressionOptions.quality == Quality_Fastest)
 		{
-			fast.compressDXT1(outputOptions);
+			fastCompressDXT1(image, outputOptions);
 		}
 		else
 		{
 			if (cudaEnabled)
 			{
 				nvDebugCheck(cudaSupported);
-				cuda->setImage(image, inputOptions.alphaMode);
+				cuda->compressDXT1(image, outputOptions, compressionOptions);
-				cuda->compressDXT1(compressionOptions, outputOptions);
 			}
 			else
 			{
-				slow.compressDXT1(compressionOptions, outputOptions);
+				compressDXT1(image, outputOptions, compressionOptions);
 			}
 		}
 	}
@@ -741,18 +702,18 @@ bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptio
 	{
 		if (compressionOptions.quality == Quality_Fastest)
 		{
-			fast.compressDXT1a(outputOptions);
+			fastCompressDXT1a(image, outputOptions);
 		}
 		else
 		{
 			if (cudaEnabled)
 			{
 				nvDebugCheck(cudaSupported);
-				/*cuda*/slow.compressDXT1a(compressionOptions, outputOptions);
+				/*cuda*/compressDXT1a(image, outputOptions, compressionOptions);
 			}
 			else
 			{
-				slow.compressDXT1a(compressionOptions, outputOptions);
+				compressDXT1a(image, outputOptions, compressionOptions);
 			}
 		}
 	}
@@ -760,19 +721,18 @@ bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptio
 	{
 		if (compressionOptions.quality == Quality_Fastest)
 		{
-			fast.compressDXT3(outputOptions);
+			fastCompressDXT3(image, outputOptions);
 		}
 		else
 		{
 			if (cudaEnabled)
 			{
 				nvDebugCheck(cudaSupported);
-				cuda->setImage(image, inputOptions.alphaMode);
+				cuda->compressDXT3(image, outputOptions, compressionOptions);
-				cuda->compressDXT3(compressionOptions, outputOptions);
 			}
 			else
 			{
-				slow.compressDXT3(compressionOptions, outputOptions);
+				compressDXT3(image, outputOptions, compressionOptions);
 			}
 		}
 	}
@@ -780,19 +740,18 @@ bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptio
 	{
 		if (compressionOptions.quality == Quality_Fastest)
 		{
-			fast.compressDXT5(outputOptions);
+			fastCompressDXT5(image, outputOptions);
 		}
 		else
 		{
 			if (cudaEnabled)
 			{
 				nvDebugCheck(cudaSupported);
-				cuda->setImage(image, inputOptions.alphaMode);
+				cuda->compressDXT5(image, outputOptions, compressionOptions);
-				cuda->compressDXT5(compressionOptions, outputOptions);
 			}
 			else
 			{
-				slow.compressDXT5(compressionOptions, outputOptions);
+				compressDXT5(image, outputOptions, compressionOptions);
 			}
 		}
 	}
@@ -800,20 +759,20 @@ bool Compressor::Private::compressMipmap(const Mipmap & mipmap, const InputOptio
 	{
 		if (compressionOptions.quality == Quality_Fastest)
 		{
-			fast.compressDXT5n(outputOptions);
+			fastCompressDXT5n(image, outputOptions);
 		}
 		else
 		{
-			slow.compressDXT5n(compressionOptions, outputOptions);
+			compressDXT5n(image, outputOptions, compressionOptions);
 		}
 	}
 	else if (compressionOptions.format == Format_BC4)
 	{
-		slow.compressBC4(compressionOptions, outputOptions);
+		compressBC4(image, outputOptions, compressionOptions);
 	}
 	else if (compressionOptions.format == Format_BC5)
 	{
-		slow.compressBC5(compressionOptions, outputOptions);
+		compressBC5(image, outputOptions, compressionOptions);
 	}
 
 	return true;

src/nvtt/Compressor.h

@@ -60,7 +60,7 @@ namespace nvtt
 		void scaleMipmap(Mipmap & mipmap, const InputOptions::Private & inputOptions, uint w, uint h, uint d) const;
 		void processInputImage(Mipmap & mipmap, const InputOptions::Private & inputOptions) const;
 		void quantizeMipmap(Mipmap & mipmap, const CompressionOptions::Private & compressionOptions) const;
-		bool compressMipmap(const Mipmap & mipmap, const InputOptions::Private & inputOptions, const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions) const;
+		bool compressMipmap(const Mipmap & mipmap, const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions) const;
 
 
 	public:

src/nvtt/FastCompressDXT.cpp

@@ -0,0 +1,456 @@
+// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
+// 
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+
+#include <nvmath/Color.h>
+#include <nvimage/ColorBlock.h>
+#include <nvimage/BlockDXT.h>
+
+#include "FastCompressDXT.h"
+
+#if defined(__SSE2__)
+#include <emmintrin.h>
+#endif
+
+#if defined(__SSE__)
+#include <xmmintrin.h>
+#endif
+
+#if defined(__MMX__)
+#include <mmintrin.h>
+#endif
+
+#undef __VEC__
+#if defined(__VEC__)
+#include <altivec.h>
+#undef bool
+#endif
+// Online Resources:
+// - http://www.jasondorie.com/ImageLib.zip
+// - http://homepage.hispeed.ch/rscheidegger/dri_experimental/s3tc_index.html
+// - http://www.sjbrown.co.uk/?article=dxt
+
+using namespace nv;
+
+
+#if defined(__SSE2__) && 0
+
+// @@ TODO
+
+typedef __m128i VectorColor;
+
+inline static __m128i loadColor(Color32 c)
+{
+	return ...;
+}
+
+inline static __m128i absoluteDifference(__m128i a, __m128i b)
+{
+	return ...;
+}
+	
+inline uint colorDistance(__m128i a, __m128i b)
+{
+	return 0;
+}
+
+#elif defined(__MMX__) && 0
+
+typedef __m64 VectorColor;
+
+inline static __m64 loadColor(Color32 c)
+{
+	return _mm_unpacklo_pi8(_mm_cvtsi32_si64(c), _mm_setzero_si64());
+}
+
+inline static __m64 absoluteDifference(__m64 a, __m64 b)
+{
+	// = |a-b| or |b-a|
+	return _mm_or_si64(_mm_subs_pu16(a, b), _mm_subs_pu16(b, a));
+}
+	
+inline uint colorDistance(__m64 a, __m64 b)
+{
+	union {
+		__m64 v;
+		uint16 part[4];
+	} s;
+	
+	s.v = absoluteDifference(a, b);
+		
+	// @@ This is very slow!
+	return s.part[0] + s.part[1] + s.part[2] + s.part[3];
+}
+
+#define vectorEnd	_mm_empty
+
+#elif defined(__VEC__)
+
+typedef vector signed int VectorColor;
+
+inline static vector signed int loadColor(Color32 c)
+{
+	return (vector signed int) (c.r, c.g, c.b, c.a);
+}
+
+// Get the absolute distance between the given colors.
+inline static uint colorDistance(vector signed int c0, vector signed int c1)
+{
+	int result;
+	vector signed int v = vec_sums(vec_abs(vec_sub(c0, c1)), (vector signed int)0);
+	vec_ste(vec_splat(v, 3), 0, &result);
+	return result;
+}
+
+inline void vectorEnd()
+{
+}
+
+#else
+
+typedef Color32 VectorColor;
+
+inline static Color32 loadColor(Color32 c)
+{
+	return c;
+}
+
+inline static Color32 premultiplyAlpha(Color32 c)
+{
+	Color32 pm;
+	pm.r = (c.r * c.a) >> 8;
+	pm.g = (c.g * c.a) >> 8;
+	pm.b = (c.b * c.a) >> 8;
+	pm.a = c.a;
+	return pm;
+}
+
+inline static uint sqr(uint s)
+{
+	return s*s;
+}
+
+// Get the absolute distance between the given colors.
+inline static uint colorDistance(Color32 c0, Color32 c1)
+{
+	return sqr(c0.r - c1.r) + sqr(c0.g - c1.g) + sqr(c0.b - c1.b);
+	//return abs(c0.r - c1.r) + abs(c0.g - c1.g) + abs(c0.b - c1.b);
+}
+
+inline void vectorEnd()
+{
+}
+
+#endif
+
+
+inline static uint computeIndices(const ColorBlock & rgba, const Color32 palette[4])
+{
+	const VectorColor vcolor0 = loadColor(palette[0]);
+	const VectorColor vcolor1 = loadColor(palette[1]);
+	const VectorColor vcolor2 = loadColor(palette[2]);
+	const VectorColor vcolor3 = loadColor(palette[3]);
+	
+	uint indices = 0;
+	for(int i = 0; i < 16; i++) {
+		const VectorColor vcolor = loadColor(rgba.color(i));
+		
+		uint d0 = colorDistance(vcolor0, vcolor);
+		uint d1 = colorDistance(vcolor1, vcolor);
+		uint d2 = colorDistance(vcolor2, vcolor);
+		uint d3 = colorDistance(vcolor3, vcolor);
+		
+		uint b0 = d0 > d3;
+		uint b1 = d1 > d2;
+		uint b2 = d0 > d2;
+		uint b3 = d1 > d3;
+		uint b4 = d2 > d3;
+		
+		uint x0 = b1 & b2;
+		uint x1 = b0 & b3;
+		uint x2 = b0 & b4;
+		
+		indices |= (x2 | ((x0 | x1) << 1)) << (2 * i);
+	}
+
+	vectorEnd();
+	return indices;
+}
+
+
+// Compressor that uses bounding box.
+void nv::compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT1 * block)
+{
+	Color32 c0, c1;
+	rgba.boundsRange(&c1, &c0);
+	
+	block->col0 = toColor16(c0);
+	block->col1 = toColor16(c1);
+	
+	nvDebugCheck(block->col0.u > block->col1.u);
+	
+	// Use 4 color mode only.
+	//if (block->col0.u < block->col1.u) {
+	//	swap(block->col0.u, block->col1.u);
+	//}
+	
+	Color32 palette[4];
+	block->evaluatePalette4(palette);
+	
+	block->indices = computeIndices(rgba, palette);
+}
+
+
+
+
+
+
+
+
+// Encode DXT3 block.
+void nv::compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT3 * block)
+{
+	compressBlock_BoundsRange(rgba, &block->color);
+	compressBlock(rgba, &block->alpha);
+}
+
+// Encode DXT3 alpha block.
+void nv::compressBlock(const ColorBlock & rgba, AlphaBlockDXT3 * block)
+{
+	block->alpha0 = rgba.color(0).a >> 4;
+	block->alpha1 = rgba.color(1).a >> 4;
+	block->alpha2 = rgba.color(2).a >> 4;
+	block->alpha3 = rgba.color(3).a >> 4;
+	block->alpha4 = rgba.color(4).a >> 4;
+	block->alpha5 = rgba.color(5).a >> 4;
+	block->alpha6 = rgba.color(6).a >> 4;
+	block->alpha7 = rgba.color(7).a >> 4;
+	block->alpha8 = rgba.color(8).a >> 4;
+	block->alpha9 = rgba.color(9).a >> 4;
+	block->alphaA = rgba.color(10).a >> 4;
+	block->alphaB = rgba.color(11).a >> 4;
+	block->alphaC = rgba.color(12).a >> 4;
+	block->alphaD = rgba.color(13).a >> 4;
+	block->alphaE = rgba.color(14).a >> 4;
+	block->alphaF = rgba.color(15).a >> 4;
+}
+
+
+
+static uint computeAlphaIndices(const ColorBlock & rgba, AlphaBlockDXT5 * block)
+{
+	uint8 alphas[8];
+	block->evaluatePalette(alphas);
+
+	uint totalError = 0;
+
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 alpha = rgba.color(i).a;
+
+		uint besterror = 256*256;
+		uint best = 8;
+		for(uint p = 0; p < 8; p++)
+		{
+			int d = alphas[p] - alpha;
+			uint error = d * d;
+
+			if (error < besterror)
+			{
+				besterror = error;
+				best = p;
+			}
+		}
+		nvDebugCheck(best < 8);
+
+		totalError += besterror;
+		block->setIndex(i, best);
+	}
+
+	return totalError;
+}
+
+static uint computeAlphaError(const ColorBlock & rgba, const AlphaBlockDXT5 * block)
+{
+	uint8 alphas[8];
+	block->evaluatePalette(alphas);
+
+	uint totalError = 0;
+
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 alpha = rgba.color(i).a;
+
+		uint besterror = 256*256;
+		uint best;
+		for(uint p = 0; p < 8; p++)
+		{
+			int d = alphas[p] - alpha;
+			uint error = d * d;
+
+			if (error < besterror)
+			{
+				besterror = error;
+				best = p;
+			}
+		}
+
+		totalError += besterror;
+	}
+
+	return totalError;
+}
+
+
+void nv::compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT5 * block)
+{
+	Color32 c0, c1;
+	rgba.boundsRangeAlpha(&c1, &c0);
+	
+	block->color.col0 = toColor16(c0);
+	block->color.col1 = toColor16(c1);
+	
+	nvDebugCheck(block->color.col0.u > block->color.col1.u);
+	
+	Color32 palette[4];
+	block->color.evaluatePalette4(palette);
+	
+	block->color.indices = computeIndices(rgba, palette);
+	
+	nvDebugCheck(c0.a <= c1.a);
+	
+	block->alpha.alpha0 = c0.a;
+	block->alpha.alpha1 = c1.a;
+	
+	computeAlphaIndices(rgba, &block->alpha);
+}
+
+
+uint nv::compressBlock_BoundsRange(const ColorBlock & rgba, AlphaBlockDXT5 * block)
+{
+	uint8 alpha0 = 0;
+	uint8 alpha1 = 255;
+
+	// Get min/max alpha.
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 alpha = rgba.color(i).a;
+		alpha0 = max(alpha0, alpha);
+		alpha1 = min(alpha1, alpha);
+	}
+
+	alpha0 = alpha0 - (alpha0 - alpha1) / 32;
+	alpha1 = alpha1 + (alpha0 - alpha1) / 32;
+
+	AlphaBlockDXT5 block0;
+	block0.alpha0 = alpha0;
+	block0.alpha1 = alpha1;
+	uint error0 = computeAlphaIndices(rgba, &block0);
+
+	AlphaBlockDXT5 block1;
+	block1.alpha0 = alpha1;
+	block1.alpha1 = alpha0;
+	uint error1 = computeAlphaIndices(rgba, &block1);
+
+	if (error0 < error1)
+	{
+		*block = block0;
+		return error0;
+	}
+	else
+	{
+		*block = block1;
+		return error1;
+	}
+}
+
+uint nv::compressBlock_BruteForce(const ColorBlock & rgba, AlphaBlockDXT5 * block)
+{
+	uint8 mina = 255;
+	uint8 maxa = 0;
+
+	// Get min/max alpha.
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 alpha = rgba.color(i).a;
+		mina = min(mina, alpha);
+		maxa = max(maxa, alpha);
+	}
+
+	block->alpha0 = maxa;
+	block->alpha1 = mina;
+
+	/*int centroidDist = 256;
+	int centroid;
+
+	// Get the closest to the centroid.
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 alpha = rgba.color(i).a;
+		int dist = abs(alpha - (maxa + mina) / 2);
+		if (dist < centroidDist)
+		{
+			centroidDist = dist;
+			centroid = alpha;
+		}
+	}*/
+
+	if (maxa - mina > 8)
+	{
+		int besterror = computeAlphaError(rgba, block);
+		int besta0 = maxa;
+		int besta1 = mina;
+
+		for (int a0 = mina+9; a0 < maxa; a0++)
+		{
+			for (int a1 = mina; a1 < a0-8; a1++)
+			//for (int a1 = mina; a1 < maxa; a1++)
+			{
+				//nvCheck(abs(a1-a0) > 8);
+
+				//if (abs(a0 - a1) < 8) continue;
+				//if ((maxa-a0) + (a1-mina) + min(abs(centroid-a0), abs(centroid-a1)) > besterror)
+				if ((maxa-a0) + (a1-mina) > besterror)
+					continue;
+
+				block->alpha0 = a0;
+				block->alpha1 = a1;
+				int error = computeAlphaError(rgba, block);
+
+				if (error < besterror)
+				{
+					besterror = error;
+					besta0 = a0;
+					besta1 = a1;
+				}
+			}
+		}
+
+		block->alpha0 = besta0;
+		block->alpha1 = besta1;
+	}
+
+	return computeAlphaIndices(rgba, block);
+}
+
+
+

src/nvtt/FastCompressDXT.h

@@ -0,0 +1,84 @@
+// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
+// 
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+
+#ifndef NV_TT_FASTCOMPRESSDXT_H
+#define NV_TT_FASTCOMPRESSDXT_H
+
+#include <nvimage/nvimage.h>
+
+namespace nv
+{
+	struct ColorBlock;
+	struct BlockDXT1;
+	struct BlockDXT3;
+	struct BlockDXT5;
+	struct AlphaBlockDXT3;
+	struct AlphaBlockDXT5;
+
+	// Color compression:
+
+	// Compressor that uses the extremes of the luminance axis.
+//	void compressBlock_DiameterAxis(const ColorBlock & rgba, BlockDXT1 * block);
+
+	// Compressor that uses the extremes of the luminance axis.
+//	void compressBlock_LuminanceAxis(const ColorBlock & rgba, BlockDXT1 * block);
+
+	// Compressor that uses bounding box.
+	void compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT1 * block);
+
+	// Compressor that uses bounding box and takes alpha into account.
+//	void compressBlock_BoundsRangeAlpha(const ColorBlock & rgba, BlockDXT1 * block);
+
+
+	// Simple, but slow compressor that tests all color pairs.
+//	void compressBlock_TestAllPairs(const ColorBlock & rgba, BlockDXT1 * block);
+	
+	// Brute force 6d search along the best fit axis.
+//	void compressBlock_AnalyzeBestFitAxis(const ColorBlock & rgba, BlockDXT1 * block);
+
+	// Spatial greedy search.
+//	void refineSolution_1dSearch(const ColorBlock & rgba, BlockDXT1 * block);
+//	void refineSolution_3dSearch(const ColorBlock & rgba, BlockDXT1 * block);
+//	void refineSolution_6dSearch(const ColorBlock & rgba, BlockDXT1 * block);
+	
+	// Brute force compressor for DXT5n
+//	void compressGreenBlock_BruteForce(const ColorBlock & rgba, BlockDXT1 * block);
+
+	// Minimize error of the endpoints.
+//	void optimizeEndPoints(const ColorBlock & rgba, BlockDXT1 * block);
+	
+//	uint blockError(const ColorBlock & rgba, const BlockDXT1 & block);
+//	uint blockError(const ColorBlock & rgba, const AlphaBlockDXT5 & block);
+
+	// Alpha compression:
+	void compressBlock(const ColorBlock & rgba, AlphaBlockDXT3 * block);
+	void compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT3 * block);
+	void compressBlock_BoundsRange(const ColorBlock & rgba, BlockDXT5 * block);
+
+	uint compressBlock_BoundsRange(const ColorBlock & rgba, AlphaBlockDXT5 * block);
+	uint compressBlock_BruteForce(const ColorBlock & rgba, AlphaBlockDXT5 * block);
+//	uint compressBlock_Iterative(const ColorBlock & rgba, AlphaBlockDXT5 * block);
+
+} // nv namespace
+
+#endif // NV_TT_FASTCOMPRESSDXT_H

src/nvtt/OptimalCompressDXT.cpp

@@ -1,368 +0,0 @@
-// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
-// 
-// Permission is hereby granted, free of charge, to any person
-// obtaining a copy of this software and associated documentation
-// files (the "Software"), to deal in the Software without
-// restriction, including without limitation the rights to use,
-// copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the
-// Software is furnished to do so, subject to the following
-// conditions:
-// 
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-// OTHER DEALINGS IN THE SOFTWARE.
-
-#include <nvcore/Containers.h> // swap
-
-#include <nvmath/Color.h>
-
-#include <nvimage/ColorBlock.h>
-#include <nvimage/BlockDXT.h>
-
-#include "OptimalCompressDXT.h"
-#include "SingleColorLookup.h"
-
-
-using namespace nv;
-using namespace OptimalCompress;
-
-
-
-namespace
-{
-	static int computeGreenError(const ColorBlock & rgba, const BlockDXT1 * block)
-	{
-		nvDebugCheck(block != NULL);
-
-		int palette[4];
-		palette[0] = (block->col0.g << 2) | (block->col0.g >> 4);
-		palette[1] = (block->col1.g << 2) | (block->col1.g >> 4);
-		palette[2] = (2 * palette[0] + palette[1]) / 3;
-		palette[3] = (2 * palette[1] + palette[0]) / 3;
-
-		int totalError = 0;
-
-		for (int i = 0; i < 16; i++)
-		{
-			const int green = rgba.color(i).g;
-			
-			int error = abs(green - palette[0]);
-			error = min(error, abs(green - palette[1]));
-			error = min(error, abs(green - palette[2]));
-			error = min(error, abs(green - palette[3]));
-			
-			totalError += error;
-		}
-
-		return totalError;
-	}
-
-	static uint computeGreenIndices(const ColorBlock & rgba, const Color32 palette[4])
-	{
-		const int color0 = palette[0].g;
-		const int color1 = palette[1].g;
-		const int color2 = palette[2].g;
-		const int color3 = palette[3].g;
-		
-		uint indices = 0;
-		for (int i = 0; i < 16; i++)
-		{
-			const int color = rgba.color(i).g;
-			
-			uint d0 = abs(color0 - color);
-			uint d1 = abs(color1 - color);
-			uint d2 = abs(color2 - color);
-			uint d3 = abs(color3 - color);
-			
-			uint b0 = d0 > d3;
-			uint b1 = d1 > d2;
-			uint b2 = d0 > d2;
-			uint b3 = d1 > d3;
-			uint b4 = d2 > d3;
-			
-			uint x0 = b1 & b2;
-			uint x1 = b0 & b3;
-			uint x2 = b0 & b4;
-			
-			indices |= (x2 | ((x0 | x1) << 1)) << (2 * i);
-		}
-
-		return indices;
-	}
-
-	// Choose quantized color that produces less error. Used by DXT3 compressor.
-	inline static uint quantize4(uint8 a)
-	{
-		int q0 = (a >> 4) - 1;
-		int q1 = (a >> 4);
-		int q2 = (a >> 4) + 1;
-		
-		q0 = (q0 << 4) | q0;
-		q1 = (q1 << 4) | q1;
-		q2 = (q2 << 4) | q2;
-		
-		int d0 = abs(q0 - a);
-		int d1 = abs(q1 - a);
-		int d2 = abs(q2 - a);
-
-		if (d0 < d1 && d0 < d2) return q0 >> 4;
-		if (d1 < d2) return q1 >> 4;
-		return q2 >> 4;
-	}
-	
-	static uint computeAlphaError(const ColorBlock & rgba, const AlphaBlockDXT5 * block)
-	{
-		uint8 alphas[8];
-		block->evaluatePalette(alphas);
-
-		uint totalError = 0;
-
-		for (uint i = 0; i < 16; i++)
-		{
-			uint8 alpha = rgba.color(i).a;
-
-			uint besterror = 256*256;
-			uint best;
-			for (uint p = 0; p < 8; p++)
-			{
-				int d = alphas[p] - alpha;
-				uint error = d * d;
-
-				if (error < besterror)
-				{
-					besterror = error;
-					best = p;
-				}
-			}
-
-			totalError += besterror;
-		}
-
-		return totalError;
-	}
-	
-	static void computeAlphaIndices(const ColorBlock & rgba, AlphaBlockDXT5 * block)
-	{
-		uint8 alphas[8];
-		block->evaluatePalette(alphas);
-
-		for (uint i = 0; i < 16; i++)
-		{
-			uint8 alpha = rgba.color(i).a;
-
-			uint besterror = 256*256;
-			uint best = 8;
-			for(uint p = 0; p < 8; p++)
-			{
-				int d = alphas[p] - alpha;
-				uint error = d * d;
-
-				if (error < besterror)
-				{
-					besterror = error;
-					best = p;
-				}
-			}
-			nvDebugCheck(best < 8);
-
-			block->setIndex(i, best);
-		}
-	}
-
-} // namespace
-
-
-
-
-
-// Single color compressor, based on:
-// https://mollyrocket.com/forums/viewtopic.php?t=392
-void OptimalCompress::compressDXT1(Color32 c, BlockDXT1 * dxtBlock)
-{
-	dxtBlock->col0.r = OMatch5[c.r][0];
-	dxtBlock->col0.g = OMatch6[c.g][0];
-	dxtBlock->col0.b = OMatch5[c.b][0];
-	dxtBlock->col1.r = OMatch5[c.r][1];
-	dxtBlock->col1.g = OMatch6[c.g][1];
-	dxtBlock->col1.b = OMatch5[c.b][1];
-	dxtBlock->indices = 0xaaaaaaaa;
-
-	if (dxtBlock->col0.u < dxtBlock->col1.u)
-	{
-		swap(dxtBlock->col0.u, dxtBlock->col1.u);
-		dxtBlock->indices ^= 0x55555555;
-	}
-}
-
-void OptimalCompress::compressDXT1a(Color32 rgba, BlockDXT1 * dxtBlock)
-{
-	if (rgba.a < 128)
-	{
-		dxtBlock->col0.u = 0;
-		dxtBlock->col1.u = 0;
-		dxtBlock->indices = 0xFFFFFFFF;
-	}
-	else
-	{
-		compressDXT1(rgba, dxtBlock);
-	}
-}
-
-
-// Brute force green channel compressor
-void OptimalCompress::compressDXT1G(const ColorBlock & rgba, BlockDXT1 * block)
-{
-	nvDebugCheck(block != NULL);
-	
-	uint8 ming = 63;
-	uint8 maxg = 0;
-	
-	// Get min/max green.
-	for (uint i = 0; i < 16; i++)
-	{
-		uint8 green = rgba.color(i).g >> 2;
-		ming = min(ming, green);
-		maxg = max(maxg, green);
-	}
-
-	block->col0.r = 31;
-	block->col1.r = 31;
-	block->col0.g = maxg;
-	block->col1.g = ming;
-	block->col0.b = 0;
-	block->col1.b = 0;
-
-	if (maxg - ming > 4)
-	{
-		int besterror = computeGreenError(rgba, block);
-		int bestg0 = maxg;
-		int bestg1 = ming;
-		
-		for (int g0 = ming+5; g0 < maxg; g0++)
-		{
-			for (int g1 = ming; g1 < g0-4; g1++)
-			{
-				if ((maxg-g0) + (g1-ming) > besterror)
-					continue;
-				
-				block->col0.g = g0;
-				block->col1.g = g1;
-				int error = computeGreenError(rgba, block);
-				
-				if (error < besterror)
-				{
-					besterror = error;
-					bestg0 = g0;
-					bestg1 = g1;
-				}
-			}
-		}
-		
-		block->col0.g = bestg0;
-		block->col1.g = bestg1;
-	}
-	
-	Color32 palette[4];
-	block->evaluatePalette(palette);
-	block->indices = computeGreenIndices(rgba, palette);
-}
-
-void OptimalCompress::compressDXT3A(const ColorBlock & rgba, AlphaBlockDXT3 * dxtBlock)
-{
-	dxtBlock->alpha0 = quantize4(rgba.color(0).a);
-	dxtBlock->alpha1 = quantize4(rgba.color(1).a);
-	dxtBlock->alpha2 = quantize4(rgba.color(2).a);
-	dxtBlock->alpha3 = quantize4(rgba.color(3).a);
-	dxtBlock->alpha4 = quantize4(rgba.color(4).a);
-	dxtBlock->alpha5 = quantize4(rgba.color(5).a);
-	dxtBlock->alpha6 = quantize4(rgba.color(6).a);
-	dxtBlock->alpha7 = quantize4(rgba.color(7).a);
-	dxtBlock->alpha8 = quantize4(rgba.color(8).a);
-	dxtBlock->alpha9 = quantize4(rgba.color(9).a);
-	dxtBlock->alphaA = quantize4(rgba.color(10).a);
-	dxtBlock->alphaB = quantize4(rgba.color(11).a);
-	dxtBlock->alphaC = quantize4(rgba.color(12).a);
-	dxtBlock->alphaD = quantize4(rgba.color(13).a);
-	dxtBlock->alphaE = quantize4(rgba.color(14).a);
-	dxtBlock->alphaF = quantize4(rgba.color(15).a);
-}
-
-
-void OptimalCompress::compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock)
-{
-	uint8 mina = 255;
-	uint8 maxa = 0;
-
-	// Get min/max alpha.
-	for (uint i = 0; i < 16; i++)
-	{
-		uint8 alpha = rgba.color(i).a;
-		mina = min(mina, alpha);
-		maxa = max(maxa, alpha);
-	}
-
-	dxtBlock->alpha0 = maxa;
-	dxtBlock->alpha1 = mina;
-
-	/*int centroidDist = 256;
-	int centroid;
-
-	// Get the closest to the centroid.
-	for (uint i = 0; i < 16; i++)
-	{
-		uint8 alpha = rgba.color(i).a;
-		int dist = abs(alpha - (maxa + mina) / 2);
-		if (dist < centroidDist)
-		{
-			centroidDist = dist;
-			centroid = alpha;
-		}
-	}*/
-
-	if (maxa - mina > 8)
-	{
-		int besterror = computeAlphaError(rgba, dxtBlock);
-		int besta0 = maxa;
-		int besta1 = mina;
-
-		for (int a0 = mina+9; a0 < maxa; a0++)
-		{
-			for (int a1 = mina; a1 < a0-8; a1++)
-			//for (int a1 = mina; a1 < maxa; a1++)
-			{
-				//nvCheck(abs(a1-a0) > 8);
-
-				//if (abs(a0 - a1) < 8) continue;
-				//if ((maxa-a0) + (a1-mina) + min(abs(centroid-a0), abs(centroid-a1)) > besterror)
-				if ((maxa-a0) + (a1-mina) > besterror)
-					continue;
-
-				dxtBlock->alpha0 = a0;
-				dxtBlock->alpha1 = a1;
-				int error = computeAlphaError(rgba, dxtBlock);
-
-				if (error < besterror)
-				{
-					besterror = error;
-					besta0 = a0;
-					besta1 = a1;
-				}
-			}
-		}
-
-		dxtBlock->alpha0 = besta0;
-		dxtBlock->alpha1 = besta1;
-	}
-
-	computeAlphaIndices(rgba, dxtBlock);
-}
-

src/nvtt/OptimalCompressDXT.h

@@ -1,49 +0,0 @@
-// Copyright NVIDIA Corporation 2008 -- Ignacio Castano <icastano@nvidia.com>
-// 
-// Permission is hereby granted, free of charge, to any person
-// obtaining a copy of this software and associated documentation
-// files (the "Software"), to deal in the Software without
-// restriction, including without limitation the rights to use,
-// copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the
-// Software is furnished to do so, subject to the following
-// conditions:
-// 
-// The above copyright notice and this permission notice shall be
-// included in all copies or substantial portions of the Software.
-// 
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-// OTHER DEALINGS IN THE SOFTWARE.
-
-#ifndef NV_TT_OPTIMALCOMPRESSDXT_H
-#define NV_TT_OPTIMALCOMPRESSDXT_H
-
-#include <nvimage/nvimage.h>
-
-namespace nv
-{
-	struct ColorBlock;
-	struct BlockDXT1;
-	struct BlockDXT3;
-	struct BlockDXT5;
-	struct AlphaBlockDXT3;
-	struct AlphaBlockDXT5;
-
-	namespace OptimalCompress
-	{
-		void compressDXT1(Color32 rgba, BlockDXT1 * dxtBlock);
-		void compressDXT1a(Color32 rgba, BlockDXT1 * dxtBlock);
-		
-		void compressDXT1G(const ColorBlock & rgba, BlockDXT1 * block);
-		void compressDXT3A(const ColorBlock & rgba, AlphaBlockDXT3 * dxtBlock);
-		void compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock);
-	}
-} // nv namespace
-
-#endif // NV_TT_OPTIMALCOMPRESSDXT_H

src/nvtt/QuickCompressDXT.cpp

@@ -27,7 +27,7 @@
 #include <nvimage/BlockDXT.h>
 
 #include "QuickCompressDXT.h"
-#include "OptimalCompressDXT.h"
+#include "SingleColorLookup.h"
 
 
 using namespace nv;
@@ -288,6 +288,70 @@ static void optimizeEndPoints4(Vector3 block[16], BlockDXT1 * dxtBlock)
 	dxtBlock->indices = computeIndices3(block, a, b);
 }*/
 
+namespace
+{
+	static int computeGreenError(const ColorBlock & rgba, const BlockDXT1 * block)
+	{
+		nvDebugCheck(block != NULL);
+
+		int palette[4];
+		palette[0] = (block->col0.g << 2) | (block->col0.g >> 4);
+		palette[1] = (block->col1.g << 2) | (block->col1.g >> 4);
+		palette[2] = (2 * palette[0] + palette[1]) / 3;
+		palette[3] = (2 * palette[1] + palette[0]) / 3;
+
+		int totalError = 0;
+
+		for (int i = 0; i < 16; i++)
+		{
+			const int green = rgba.color(i).g;
+			
+			int error = abs(green - palette[0]);
+			error = min(error, abs(green - palette[1]));
+			error = min(error, abs(green - palette[2]));
+			error = min(error, abs(green - palette[3]));
+			
+			totalError += error;
+		}
+
+		return totalError;
+	}
+
+	static uint computeGreenIndices(const ColorBlock & rgba, const Color32 palette[4])
+	{
+		const int color0 = palette[0].g;
+		const int color1 = palette[1].g;
+		const int color2 = palette[2].g;
+		const int color3 = palette[3].g;
+		
+		uint indices = 0;
+		for (int i = 0; i < 16; i++)
+		{
+			const int color = rgba.color(i).g;
+			
+			uint d0 = abs(color0 - color);
+			uint d1 = abs(color1 - color);
+			uint d2 = abs(color2 - color);
+			uint d3 = abs(color3 - color);
+			
+			uint b0 = d0 > d3;
+			uint b1 = d1 > d2;
+			uint b2 = d0 > d2;
+			uint b3 = d1 > d3;
+			uint b4 = d2 > d3;
+			
+			uint x0 = b1 & b2;
+			uint x1 = b0 & b3;
+			uint x2 = b0 & b4;
+			
+			indices |= (x2 | ((x0 | x1) << 1)) << (2 * i);
+		}
+
+		return indices;
+	}
+
+} // namespace
+
 namespace
 {
 
@@ -439,63 +503,79 @@ namespace
 
 
 
-void QuickCompress::compressDXT1(const ColorBlock & rgba, BlockDXT1 * dxtBlock)
+
+
+// Single color compressor, based on:
+// https://mollyrocket.com/forums/viewtopic.php?t=392
+void QuickCompress::compressDXT1(Color32 c, BlockDXT1 * dxtBlock)
 {
-	if (rgba.isSingleColor())
+	dxtBlock->col0.r = OMatch5[c.r][0];
+	dxtBlock->col0.g = OMatch6[c.g][0];
+	dxtBlock->col0.b = OMatch5[c.b][0];
+	dxtBlock->col1.r = OMatch5[c.r][1];
+	dxtBlock->col1.g = OMatch6[c.g][1];
+	dxtBlock->col1.b = OMatch5[c.b][1];
+	dxtBlock->indices = 0xaaaaaaaa;
+
+	if (dxtBlock->col0.u < dxtBlock->col1.u)
 	{
-		OptimalCompress::compressDXT1(rgba.color(0), dxtBlock);
+		swap(dxtBlock->col0.u, dxtBlock->col1.u);
-	}
+		dxtBlock->indices ^= 0x55555555;
-	else
-	{
-		// read block
-		Vector3 block[16];
-		extractColorBlockRGB(rgba, block);
-		
-		// find min and max colors
-		Vector3 maxColor, minColor;
-		findMinMaxColorsBox(block, 16, &maxColor, &minColor);
-		
-		selectDiagonal(block, 16, &maxColor, &minColor);
-		
-		insetBBox(&maxColor, &minColor);
-		
-		uint16 color0 = roundAndExpand(&maxColor);
-		uint16 color1 = roundAndExpand(&minColor);
-
-		if (color0 < color1)
-		{
-			swap(maxColor, minColor);
-			swap(color0, color1);
-		}
-
-		dxtBlock->col0 = Color16(color0);
-		dxtBlock->col1 = Color16(color1);
-		dxtBlock->indices = computeIndices4(block, maxColor, minColor);
-
-		optimizeEndPoints4(block, dxtBlock);
 	}
 }
 
-
+void QuickCompress::compressDXT1(const ColorBlock & rgba, BlockDXT1 * dxtBlock)
-void QuickCompress::compressDXT1a(const ColorBlock & rgba, BlockDXT1 * dxtBlock)
 {
-	bool hasAlpha = false;
+	// read block
+	Vector3 block[16];
+	extractColorBlockRGB(rgba, block);
 	
-	for (uint i = 0; i < 16; i++)
+	// find min and max colors
+	Vector3 maxColor, minColor;
+	findMinMaxColorsBox(block, 16, &maxColor, &minColor);
+	
+	selectDiagonal(block, 16, &maxColor, &minColor);
+	
+	insetBBox(&maxColor, &minColor);
+	
+	uint16 color0 = roundAndExpand(&maxColor);
+	uint16 color1 = roundAndExpand(&minColor);
+
+	if (color0 < color1)
 	{
-		if (rgba.color(i).a < 128) {
+		swap(maxColor, minColor);
-			hasAlpha = true;
+		swap(color0, color1);
-			break;
-		}
 	}
-	
+
-	if (!hasAlpha)
+	dxtBlock->col0 = Color16(color0);
+	dxtBlock->col1 = Color16(color1);
+	dxtBlock->indices = computeIndices4(block, maxColor, minColor);
+
+	optimizeEndPoints4(block, dxtBlock);
+}
+
+
+void QuickCompress::compressDXT1a(Color32 rgba, BlockDXT1 * dxtBlock)
+{
+	if (rgba.a == 0)
+	{
+		dxtBlock->col0.u = 0;
+		dxtBlock->col1.u = 0;
+		dxtBlock->indices = 0xFFFFFFFF;
+	}
+	else
 	{
 		compressDXT1(rgba, dxtBlock);
 	}
-	// @@ Handle single RGB, with varying alpha? We need tables for single color compressor in 3 color mode.
+}
-	//else if (rgba.isSingleColorNoAlpha()) { ... }
+
-	else 
+void QuickCompress::compressDXT1a(const ColorBlock & rgba, BlockDXT1 * dxtBlock)
+{
+	if (!rgba.hasAlpha())
+	{
+		compressDXT1(rgba, dxtBlock);
+	}
+	else
 	{
 		// read block
 		Vector3 block[16];
@@ -527,14 +607,95 @@ void QuickCompress::compressDXT1a(const ColorBlock & rgba, BlockDXT1 * dxtBlock)
 }
 
 
-void QuickCompress::compressDXT3(const ColorBlock & rgba, BlockDXT3 * dxtBlock)
+// Brute force green channel compressor
+void QuickCompress::compressDXT1G(const ColorBlock & rgba, BlockDXT1 * block)
 {
-	compressDXT1(rgba, &dxtBlock->color);
+	nvDebugCheck(block != NULL);
-	OptimalCompress::compressDXT3A(rgba, &dxtBlock->alpha);
+	
+	uint8 ming = 63;
+	uint8 maxg = 0;
+	
+	// Get min/max green.
+	for (uint i = 0; i < 16; i++)
+	{
+		uint8 green = rgba.color(i).g >> 2;
+		ming = min(ming, green);
+		maxg = max(maxg, green);
+	}
+
+	block->col0.r = 31;
+	block->col1.r = 31;
+	block->col0.g = maxg;
+	block->col1.g = ming;
+	block->col0.b = 0;
+	block->col1.b = 0;
+
+	if (maxg - ming > 4)
+	{
+		int besterror = computeGreenError(rgba, block);
+		int bestg0 = maxg;
+		int bestg1 = ming;
+		
+		for (int g0 = ming+5; g0 < maxg; g0++)
+		{
+			for (int g1 = ming; g1 < g0-4; g1++)
+			{
+				if ((maxg-g0) + (g1-ming) > besterror)
+					continue;
+				
+				block->col0.g = g0;
+				block->col1.g = g1;
+				int error = computeGreenError(rgba, block);
+				
+				if (error < besterror)
+				{
+					besterror = error;
+					bestg0 = g0;
+					bestg1 = g1;
+				}
+			}
+		}
+		
+		block->col0.g = bestg0;
+		block->col1.g = bestg1;
+	}
+	
+	Color32 palette[4];
+	block->evaluatePalette(palette);
+	block->indices = computeGreenIndices(rgba, palette);
 }
 
 
-void QuickCompress::compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock, int iterationCount/*=8*/)
+
+void QuickCompress::compressDXT3A(const ColorBlock & rgba, AlphaBlockDXT3 * dxtBlock)
+{
+	// @@ Round instead of truncate. When rounding take into account bit expansion.
+	dxtBlock->alpha0 = rgba.color(0).a >> 4;
+	dxtBlock->alpha1 = rgba.color(1).a >> 4;
+	dxtBlock->alpha2 = rgba.color(2).a >> 4;
+	dxtBlock->alpha3 = rgba.color(3).a >> 4;
+	dxtBlock->alpha4 = rgba.color(4).a >> 4;
+	dxtBlock->alpha5 = rgba.color(5).a >> 4;
+	dxtBlock->alpha6 = rgba.color(6).a >> 4;
+	dxtBlock->alpha7 = rgba.color(7).a >> 4;
+	dxtBlock->alpha8 = rgba.color(8).a >> 4;
+	dxtBlock->alpha9 = rgba.color(9).a >> 4;
+	dxtBlock->alphaA = rgba.color(10).a >> 4;
+	dxtBlock->alphaB = rgba.color(11).a >> 4;
+	dxtBlock->alphaC = rgba.color(12).a >> 4;
+	dxtBlock->alphaD = rgba.color(13).a >> 4;
+	dxtBlock->alphaE = rgba.color(14).a >> 4;
+	dxtBlock->alphaF = rgba.color(15).a >> 4;
+}
+
+void QuickCompress::compressDXT3(const ColorBlock & rgba, BlockDXT3 * dxtBlock)
+{
+	compressDXT1(rgba, &dxtBlock->color);
+	compressDXT3A(rgba, &dxtBlock->alpha);
+}
+
+
+void QuickCompress::compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock)
 {
 	uint8 alpha0 = 0;
 	uint8 alpha1 = 255;
@@ -553,8 +714,8 @@ void QuickCompress::compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtB
 	uint besterror = computeAlphaIndices(rgba, &block);
 	
 	AlphaBlockDXT5 bestblock = block;
-
+	
-	for (int i = 0; i < iterationCount; i++)
+	while(true)
 	{
 		optimizeAlpha8(rgba, &block);
 		uint error = computeAlphaIndices(rgba, &block);
@@ -578,8 +739,9 @@ void QuickCompress::compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtB
 	*dxtBlock = bestblock;
 }
 
-void QuickCompress::compressDXT5(const ColorBlock & rgba, BlockDXT5 * dxtBlock, int iterationCount/*=8*/)
+void QuickCompress::compressDXT5(const ColorBlock & rgba, BlockDXT5 * dxtBlock)
 {
 	compressDXT1(rgba, &dxtBlock->color);
-	compressDXT5A(rgba, &dxtBlock->alpha, iterationCount);
+	compressDXT5A(rgba, &dxtBlock->alpha);
 }
+

src/nvtt/QuickCompressDXT.h

@@ -37,13 +37,17 @@ namespace nv
 
 	namespace QuickCompress
 	{
+		void compressDXT1(Color32 rgba, BlockDXT1 * dxtBlock);
 		void compressDXT1(const ColorBlock & rgba, BlockDXT1 * dxtBlock);
+		void compressDXT1a(Color32 rgba, BlockDXT1 * dxtBlock);
 		void compressDXT1a(const ColorBlock & rgba, BlockDXT1 * dxtBlock);
+		void compressDXT1G(const ColorBlock & rgba, BlockDXT1 * block);
 		
+		void compressDXT3A(const ColorBlock & rgba, AlphaBlockDXT3 * dxtBlock);
 		void compressDXT3(const ColorBlock & rgba, BlockDXT3 * dxtBlock);
 		
-		void compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock, int iterationCount=8);
+		void compressDXT5A(const ColorBlock & rgba, AlphaBlockDXT5 * dxtBlock);
-		void compressDXT5(const ColorBlock & rgba, BlockDXT5 * dxtBlock, int iterationCount=8);
+		void compressDXT5(const ColorBlock & rgba, BlockDXT5 * dxtBlock);
 	}
 } // nv namespace
 

src/nvtt/cuda/CompressKernel.cu

@@ -159,7 +159,7 @@ __device__ void loadColorBlock(const uint * image, float3 colors[16], float3 sum
 	}
 }
 
-__device__ void loadColorBlock(const uint * image, float3 colors[16], float3 sums[16], float weights[16], int xrefs[16], int * sameColor)
+__device__ void loadColorBlock(const uint * image, float3 colors[16], float3 sums[16], float weights[16], int xrefs[16])
 {
 	const int bid = blockIdx.x;
 	const int idx = threadIdx.x;
@@ -189,11 +189,6 @@ __device__ void loadColorBlock(const uint * image, float3 colors[16], float3 sum
 		colorSums(colors, sums);
 		float3 axis = bestFitLine(colors, sums[0], kColorMetric);
 
-		*sameColor = (axis == make_float3(0, 0, 0));
-
-		// Single color compressor needs unweighted colors.
-		if (*sameColor) colors[idx] = rawColors[idx];
-
 		dps[idx] = dot(rawColors[idx], axis);
 		
 #if __DEVICE_EMULATION__
@@ -597,40 +592,6 @@ __device__ void evalAllPermutations(const float3 * colors, const float * weights
 }
 */
 
-__device__ void evalLevel4Permutations(const float3 * colors, float3 colorSum, const uint * permutations, ushort & bestStart, ushort & bestEnd, uint & bestPermutation, float * errors)
-{
-	const int idx = threadIdx.x;
-	
-	float bestError = FLT_MAX;
-	
-	for(int i = 0; i < 16; i++)
-	{
-		int pidx = idx + NUM_THREADS * i;
-		if (pidx >= 992) break;
-		
-		ushort start, end;
-		uint permutation = permutations[pidx];
-
-		float error = evalPermutation4(colors, colorSum, permutation, &start, &end);
-		
-		if (error < bestError)
-		{
-			bestError = error;
-			bestPermutation = permutation;
-			bestStart = start;
-			bestEnd = end;
-		}
-	}
-
-	if (bestStart < bestEnd)
-	{
-		swap(bestEnd, bestStart);
-		bestPermutation ^= 0x55555555;	// Flip indices.
-	}
-
-	errors[idx] = bestError;
-}
-
 __device__ void evalLevel4Permutations(const float3 * colors, const float * weights, float3 colorSum, const uint * permutations, ushort & bestStart, ushort & bestEnd, uint & bestPermutation, float * errors)
 {
 	const int idx = threadIdx.x;
@@ -666,6 +627,7 @@ __device__ void evalLevel4Permutations(const float3 * colors, const float * weig
 }
 
 
+
 ////////////////////////////////////////////////////////////////////////////////
 // Find index with minimum error
 ////////////////////////////////////////////////////////////////////////////////
@@ -836,39 +798,6 @@ __global__ void compressDXT1(const uint * permutations, const uint * image, uint
 	}
 }
 
-__global__ void compressLevel4DXT1(const uint * permutations, const uint * image, uint2 * result)
-{
-	__shared__ float3 colors[16];
-	__shared__ float3 sums[16];
-	__shared__ int xrefs[16];
-	__shared__ int sameColor;
-	
-	loadColorBlock(image, colors, sums, xrefs, &sameColor);
-
-	__syncthreads();
-
-	if (sameColor)
-	{
-		if (threadIdx.x == 0) saveSingleColorBlockDXT1(colors[0], result);
-		return;
-	}
-
-	ushort bestStart, bestEnd;
-	uint bestPermutation;
-
-	__shared__ float errors[NUM_THREADS];
-
-	evalLevel4Permutations(colors, sums[0], permutations, bestStart, bestEnd, bestPermutation, errors);
-	
-	// Use a parallel reduction to find minimum error.
-	const int minIdx = findMinError(errors);
-	
-	// Only write the result of the winner thread.
-	if (threadIdx.x == minIdx)
-	{
-		saveBlockDXT1(bestStart, bestEnd, bestPermutation, xrefs, result);
-	}
-}
 
 __global__ void compressWeightedDXT1(const uint * permutations, const uint * image, uint2 * result)
 {
@@ -876,18 +805,11 @@ __global__ void compressWeightedDXT1(const uint * permutations, const uint * ima
 	__shared__ float3 sums[16];
 	__shared__ float weights[16];
 	__shared__ int xrefs[16];
-	__shared__ int sameColor;
 	
-	loadColorBlock(image, colors, sums, weights, xrefs, &sameColor);
+	loadColorBlock(image, colors, sums, weights, xrefs);
 	
 	__syncthreads();
 
-	if (sameColor)
-	{
-		if (threadIdx.x == 0) saveSingleColorBlockDXT1(colors[0], result);
-		return;
-	}
-
 	ushort bestStart, bestEnd;
 	uint bestPermutation;
 
@@ -1111,11 +1033,6 @@ extern "C" void compressKernelDXT1(uint blockNum, uint * d_data, uint * d_result
 	compressDXT1<<<blockNum, NUM_THREADS>>>(d_bitmaps, d_data, (uint2 *)d_result);
 }
 
-extern "C" void compressKernelDXT1_Level4(uint blockNum, uint * d_data, uint * d_result, uint * d_bitmaps)
-{
-	compressLevel4DXT1<<<blockNum, NUM_THREADS>>>(d_bitmaps, d_data, (uint2 *)d_result);
-}
-
 extern "C" void compressWeightedKernelDXT1(uint blockNum, uint * d_data, uint * d_result, uint * d_bitmaps)
 {
 	compressWeightedDXT1<<<blockNum, NUM_THREADS>>>(d_bitmaps, d_data, (uint2 *)d_result);

src/nvtt/cuda/CudaCompressDXT.cpp

@@ -30,7 +30,6 @@
 #include <nvtt/CompressionOptions.h>
 #include <nvtt/OutputOptions.h>
 #include <nvtt/QuickCompressDXT.h>
-#include <nvtt/OptimalCompressDXT.h>
 
 #include "CudaCompressDXT.h"
 #include "CudaUtils.h"
@@ -53,7 +52,6 @@ using namespace nvtt;
 
 extern "C" void setupCompressKernel(const float weights[3]);
 extern "C" void compressKernelDXT1(uint blockNum, uint * d_data, uint * d_result, uint * d_bitmaps);
-extern "C" void compressKernelDXT1_Level4(uint blockNum, uint * d_data, uint * d_result, uint * d_bitmaps);
 extern "C" void compressWeightedKernelDXT1(uint blockNum, uint * d_data, uint * d_result, uint * d_bitmaps);
 
 #include "Bitmaps.h"	// @@ Rename to BitmapTable.h
@@ -120,25 +118,20 @@ bool CudaCompressor::isValid() const
 
 // @@ This code is very repetitive and needs to be cleaned up.
 
-void CudaCompressor::setImage(const Image * image, nvtt::AlphaMode alphaMode)
-{
-	m_image = image;
-	m_alphaMode = alphaMode;
-}
 
 /// Compress image using CUDA.
-void CudaCompressor::compressDXT1(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void CudaCompressor::compressDXT1(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
 	nvDebugCheck(cuda::isHardwarePresent());
 #if defined HAVE_CUDA
 
 	// Image size in blocks.
-	const uint w = (m_image->width() + 3) / 4;
+	const uint w = (image->width() + 3) / 4;
-	const uint h = (m_image->height() + 3) / 4;
+	const uint h = (image->height() + 3) / 4;
 
 	uint imageSize = w * h * 16 * sizeof(Color32);
     uint * blockLinearImage = (uint *) malloc(imageSize);
-	convertToBlockLinear(m_image, blockLinearImage);	// @@ Do this in parallel with the GPU, or in the GPU!
+	convertToBlockLinear(image, blockLinearImage);	// @@ Do this in parallel with the GPU, or in the GPU!
 
 	const uint blockNum = w * h;
 	const uint compressedSize = blockNum * 8;
@@ -183,7 +176,7 @@ void CudaCompressor::compressDXT1(const CompressionOptions::Private & compressio
 	}
 
 	clock_t end = clock();
-	//printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
+	printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
 
 	free(blockLinearImage);
 
@@ -197,18 +190,18 @@ void CudaCompressor::compressDXT1(const CompressionOptions::Private & compressio
 
 
 /// Compress image using CUDA.
-void CudaCompressor::compressDXT3(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void CudaCompressor::compressDXT3(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
 	nvDebugCheck(cuda::isHardwarePresent());
 #if defined HAVE_CUDA
 
 	// Image size in blocks.
-	const uint w = (m_image->width() + 3) / 4;
+	const uint w = (image->width() + 3) / 4;
-	const uint h = (m_image->height() + 3) / 4;
+	const uint h = (image->height() + 3) / 4;
 
 	uint imageSize = w * h * 16 * sizeof(Color32);
     uint * blockLinearImage = (uint *) malloc(imageSize);
-	convertToBlockLinear(m_image, blockLinearImage);
+	convertToBlockLinear(image, blockLinearImage);
 
 	const uint blockNum = w * h;
 	const uint compressedSize = blockNum * 8;
@@ -228,20 +221,13 @@ void CudaCompressor::compressDXT3(const CompressionOptions::Private & compressio
 	    cudaMemcpy(m_data, blockLinearImage + bn * 16, count * 64, cudaMemcpyHostToDevice);
 
 		// Launch kernel.
-		if (m_alphaMode == AlphaMode_Transparency)
+		compressWeightedKernelDXT1(count, m_data, m_result, m_bitmapTable);
-		{
-			compressWeightedKernelDXT1(count, m_data, m_result, m_bitmapTable);
-		}
-		else
-		{
-			compressKernelDXT1_Level4(count, m_data, m_result, m_bitmapTable);
-		}
 
 		// Compress alpha in parallel with the GPU.
 		for (uint i = 0; i < count; i++)
 		{
 			ColorBlock rgba(blockLinearImage + (bn + i) * 16);
-			OptimalCompress::compressDXT3A(rgba, alphaBlocks + i);
+			QuickCompress::compressDXT3A(rgba, alphaBlocks + i);
 		}
 
 		// Check for errors.
@@ -273,7 +259,7 @@ void CudaCompressor::compressDXT3(const CompressionOptions::Private & compressio
 	}
 
 	clock_t end = clock();
-	//printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
+	printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
 
 	free(alphaBlocks);
 	free(blockLinearImage);
@@ -288,18 +274,18 @@ void CudaCompressor::compressDXT3(const CompressionOptions::Private & compressio
 
 
 /// Compress image using CUDA.
-void CudaCompressor::compressDXT5(const CompressionOptions::Private & compressionOptions, const OutputOptions::Private & outputOptions)
+void CudaCompressor::compressDXT5(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
 {
 	nvDebugCheck(cuda::isHardwarePresent());
 #if defined HAVE_CUDA
 
 	// Image size in blocks.
-	const uint w = (m_image->width() + 3) / 4;
+	const uint w = (image->width() + 3) / 4;
-	const uint h = (m_image->height() + 3) / 4;
+	const uint h = (image->height() + 3) / 4;
 
 	uint imageSize = w * h * 16 * sizeof(Color32);
     uint * blockLinearImage = (uint *) malloc(imageSize);
-	convertToBlockLinear(m_image, blockLinearImage);
+	convertToBlockLinear(image, blockLinearImage);
 
 	const uint blockNum = w * h;
 	const uint compressedSize = blockNum * 8;
@@ -319,14 +305,7 @@ void CudaCompressor::compressDXT5(const CompressionOptions::Private & compressio
 	    cudaMemcpy(m_data, blockLinearImage + bn * 16, count * 64, cudaMemcpyHostToDevice);
 
 		// Launch kernel.
-		if (m_alphaMode == AlphaMode_Transparency)
+		compressWeightedKernelDXT1(count, m_data, m_result, m_bitmapTable);
-		{
-			compressWeightedKernelDXT1(count, m_data, m_result, m_bitmapTable);
-		}
-		else
-		{
-			compressKernelDXT1_Level4(count, m_data, m_result, m_bitmapTable);
-		}
 
 		// Compress alpha in parallel with the GPU.
 		for (uint i = 0; i < count; i++)
@@ -364,7 +343,7 @@ void CudaCompressor::compressDXT5(const CompressionOptions::Private & compressio
 	}
 
 	clock_t end = clock();
-	//printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
+	printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
 
 	free(alphaBlocks);
 	free(blockLinearImage);
@@ -378,3 +357,185 @@ void CudaCompressor::compressDXT5(const CompressionOptions::Private & compressio
 }
 
 
+
+#if 0
+
+class Task
+{
+public:
+	explicit Task(uint numBlocks) : blockMaxCount(numBlocks), blockCount(0)
+	{
+		// System memory allocations.
+		blockLinearImage = new uint[blockMaxCount * 16];
+		xrefs = new uint[blockMaxCount * 16];
+		
+		// Device memory allocations.
+		cudaMalloc((void**) &d_blockLinearImage, blockMaxCount * 16 * sizeof(uint));
+		cudaMalloc((void**) &d_compressedImage, blockMaxCount * 8U);
+		
+		// @@ Check for allocation errors.
+	}
+	
+	~Task()
+	{
+		delete [] blockLinearImage;
+		delete [] xrefs;
+		
+		cudaFree(d_blockLinearImage);
+		cudaFree(d_compressedImage);
+	}
+	
+	
+	
+	void addColorBlock(const ColorBlock & rgba)
+	{
+		nvDebugCheck(!isFull());
+		
+		// @@ Count unique colors?
+		/*
+		// Convert colors to vectors.
+		Array<Vector3> pointArray(16);
+		
+		for(int i = 0; i < 16; i++) {
+			const Color32 color = rgba.color(i);
+			pointArray.append(Vector3(color.r, color.g, color.b));
+		}
+		
+		// Find best fit line.
+		const Vector3 axis = Fit::bestLine(pointArray).direction();
+		
+		// Project points to axis.
+		float dps[16];
+		uint * order = &xrefs[blockCount * 16];
+		
+		for (uint i = 0; i < 16; ++i)
+		{
+			dps[i] = dot(pointArray[i], axis);
+			order[i] = i;
+		}
+		
+		// Sort them.
+		for (uint i = 0; i < 16; ++i)
+		{
+			for (uint j = i; j > 0 && dps[j] < dps[j - 1]; --j)
+			{
+				swap(dps[j], dps[j - 1]);
+				swap(order[j], order[j - 1]);
+			}
+		}
+		*/
+		// Write sorted colors to blockLinearImage.
+		for(uint i = 0; i < 16; ++i)
+		{
+		//	blockLinearImage[blockCount * 16 + i] = rgba.color(order[i]);
+			blockLinearImage[blockCount * 16 + i] = rgba.color(i);
+		}
+		
+		++blockCount;
+	}
+	
+	bool isFull()
+	{
+		nvDebugCheck(blockCount <= blockMaxCount);
+		return blockCount == blockMaxCount;
+	}
+	
+	void flush(const OutputOptions::Private & outputOptions)
+	{
+		if (blockCount == 0)
+		{
+			// Nothing to do.
+			return;
+		}
+		
+		// Copy input color blocks.
+		cudaMemcpy(d_blockLinearImage, blockLinearImage, blockCount * 64, cudaMemcpyHostToDevice);
+		
+		// Launch kernel.
+		compressKernelDXT1(blockCount, d_blockLinearImage, d_compressedImage, d_bitmaps);
+		
+		// Check for errors.
+		cudaError_t err = cudaGetLastError();
+		if (err != cudaSuccess)
+		{
+			nvDebug("CUDA Error: %s\n", cudaGetErrorString(err));
+			
+			if (outputOptions.errorHandler != NULL)
+			{
+				outputOptions.errorHandler->error(Error_CudaError);
+			}
+		}
+		
+		// Copy result to host, overwrite swizzled image.
+		uint * compressedImage = blockLinearImage;
+		cudaMemcpy(compressedImage, d_compressedImage, blockCount * 8, cudaMemcpyDeviceToHost);
+		
+		// @@ Sort block indices.
+		
+		// Output result.
+		if (outputOptions.outputHandler != NULL)
+		{
+		//	outputOptions.outputHandler->writeData(compressedImage, blockCount * 8);
+		}
+
+		blockCount = 0;
+	}
+	
+private:
+	
+	const uint blockMaxCount;
+	uint blockCount;
+	
+	uint * blockLinearImage;
+	uint * xrefs;
+	
+	uint * d_blockLinearImage;
+	uint * d_compressedImage;
+	
+};
+
+
+void nv::cudaCompressDXT1_2(const Image * image, const OutputOptions::Private & outputOptions, const CompressionOptions::Private & compressionOptions)
+{
+#if defined HAVE_CUDA	
+	const uint w = image->width();
+	const uint h = image->height();
+	
+	const uint blockNum = ((w + 3) / 4) * ((h + 3) / 4);
+	const uint blockMax = 32768; // 49152, 65535
+		
+	setupCompressKernelDXT1(compressionOptions.colorWeight.ptr());
+
+	ColorBlock rgba;
+	Task task(min(blockNum, blockMax));
+
+	clock_t start = clock();
+
+	for (uint y = 0; y < h; y += 4) {
+		for (uint x = 0; x < w; x += 4) {
+			
+			rgba.init(image, x, y);
+			
+			task.addColorBlock(rgba);
+			
+			if (task.isFull())
+			{
+				task.flush(outputOptions);
+			}
+		}
+	}
+	
+	task.flush(outputOptions);
+
+	clock_t end = clock();
+	printf("\rCUDA time taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
+
+#else
+	if (outputOptions.errorHandler != NULL)
+	{
+		outputOptions.errorHandler->error(Error_CudaError);
+	}
+#endif
+}
+
+#endif // 0

src/nvtt/cuda/CudaCompressDXT.h

@@ -39,20 +39,15 @@ namespace nv
 
 		bool isValid() const;
 
-		void setImage(const Image * image, nvtt::AlphaMode alphaMode);
+		void compressDXT1(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
-
+		void compressDXT3(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
-		void compressDXT1(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
+		void compressDXT5(const Image * image, const nvtt::OutputOptions::Private & outputOptions, const nvtt::CompressionOptions::Private & compressionOptions);
-		void compressDXT3(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
-		void compressDXT5(const nvtt::CompressionOptions::Private & compressionOptions, const nvtt::OutputOptions::Private & outputOptions);
 
 	private:
 
 		uint * m_bitmapTable;
 		uint * m_data;
 		uint * m_result;
-		
-		const Image * m_image;
-		nvtt::AlphaMode m_alphaMode;
 	};
 
 } // nv namespace

src/nvtt/cuda/CudaUtils.cpp

@@ -22,7 +22,6 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 
 #include <nvcore/Debug.h>
-#include <nvcore/Library.h>
 #include "CudaUtils.h"
 
 #if defined HAVE_CUDA
@@ -53,58 +52,29 @@ static bool isWow32()
 {
 	LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS)GetProcAddress(GetModuleHandle("kernel32"), "IsWow64Process");
 
-	BOOL bIsWow64 = FALSE;
+    BOOL bIsWow64 = FALSE;
  
-	if (NULL != fnIsWow64Process)
+    if (NULL != fnIsWow64Process)
-	{
+    {
-		if (!fnIsWow64Process(GetCurrentProcess(), &bIsWow64))
+        if (!fnIsWow64Process(GetCurrentProcess(), &bIsWow64))
-		{
+        {
 			// Assume 32 bits.
-			return true;
+            return true;
-		}
+        }
-	}
+    }
 
-	return !bIsWow64;
+    return !bIsWow64;
 }
 
 #endif
 
 
-static bool isCudaDriverAvailable(uint version)
-{
-#if NV_OS_WIN32
-	Library nvcuda("nvcuda.dll");
-#else
-	Library nvcuda(NV_LIBRARY_NAME(cuda));
-#endif
-	
-	if (!nvcuda.isValid())
-	{
-		return false;
-	}
-	
-	if (version > 2000)
-	{
-		void * address = nvcuda.bindSymbol("cuStreamCreate");
-		if (address == NULL) return false;
-	}
-
-	if (version > 2010)
-	{
-		void * address = nvcuda.bindSymbol("cuLoadDataEx");
-		if (address == NULL) return false;
-	}
-	
-	return true;
-}
-
-
 /// Determine if CUDA is available.
 bool nv::cuda::isHardwarePresent()
 {
 #if defined HAVE_CUDA
 #if NV_OS_WIN32
-	//if (isWindowsVista()) return false;
+	if (isWindowsVista()) return false;
 	//if (isWindowsVista() || !isWow32()) return false;
 #endif
 	int count = deviceCount();
@@ -120,12 +90,6 @@ bool nv::cuda::isHardwarePresent()
 			return false;
 		}
 
-		// Make sure that CUDA driver matches CUDA runtime.
-		if (!isCudaDriverAvailable(CUDART_VERSION))
-		{
-			return false;
-		}
-
 		// @@ Make sure that warp size == 32
 	}
 
@@ -151,35 +115,6 @@ int nv::cuda::deviceCount()
 	return 0;
 }
 
-int nv::cuda::getFastestDevice()
-{
-	int max_gflops_device = 0;
-#if defined HAVE_CUDA	
-	int max_gflops = 0;
-
-	const int device_count = deviceCount();
-	int current_device = 0;
-	while (current_device < device_count)
-	{
-		cudaDeviceProp device_properties;
-		cudaGetDeviceProperties(&device_properties, current_device);
-		int gflops = device_properties.multiProcessorCount * device_properties.clockRate;
-
-		if (device_properties.major != -1 && device_properties.minor != -1)
-		{
-			if( gflops > max_gflops )
-			{
-				max_gflops = gflops;
-				max_gflops_device = current_device;
-			}
-		}
-		
-		current_device++;
-	}
-#endif
-	return max_gflops_device;
-}
-
 /// Activate the given devices.
 bool nv::cuda::setDevice(int i)
 {

src/nvtt/cuda/CudaUtils.h

@@ -31,7 +31,6 @@ namespace nv
 	{
 		bool isHardwarePresent();
 		int deviceCount();
-		int getFastestDevice();
 		bool setDevice(int i);
 	};
 	

src/nvtt/squish/fastclusterfit.cpp

@@ -29,8 +29,6 @@
 #include "colourblock.h"
 #include <cfloat>
 
-#include "fastclusterlookup.inl"
-
 namespace squish {
 
 FastClusterFit::FastClusterFit()
@@ -99,6 +97,91 @@ void FastClusterFit::SetColourSet( ColourSet const* colours, int flags )
 }
 
 
+struct Precomp {
+	float alpha2_sum;
+	float beta2_sum;
+	float alphabeta_sum;
+	float factor;
+};
+
+static SQUISH_ALIGN_16 Precomp s_threeElement[153];
+static SQUISH_ALIGN_16 Precomp s_fourElement[969];
+
+void FastClusterFit::DoPrecomputation()
+{
+	int i = 0;
+	
+	// Three element clusters:
+	for( int c0 = 0; c0 <= 16; c0++)	// At least two clusters.
+	{
+		for( int c1 = 0; c1 <=  16-c0; c1++)
+		{
+			int c2 = 16 - c0 - c1;
+
+			/*if (c2 == 16) {
+				// a = b = x2 / 16
+				s_threeElement[i].alpha2_sum = 0;
+				s_threeElement[i].beta2_sum = 16;
+				s_threeElement[i].alphabeta_sum = -16;
+				s_threeElement[i].factor = 1.0f / 256.0f;
+			}
+			else if (c0 == 16) {
+				// a = b = x0 / 16
+				s_threeElement[i].alpha2_sum = 16;
+				s_threeElement[i].beta2_sum = 0;
+				s_threeElement[i].alphabeta_sum = -16;
+				s_threeElement[i].factor = 1.0f / 256.0f;
+			}
+			else*/ {
+				s_threeElement[i].alpha2_sum = c0 + c1 * 0.25f;
+				s_threeElement[i].beta2_sum = c2 + c1 * 0.25f;
+				s_threeElement[i].alphabeta_sum = c1 * 0.25f;
+				s_threeElement[i].factor = 1.0f / (s_threeElement[i].alpha2_sum * s_threeElement[i].beta2_sum - s_threeElement[i].alphabeta_sum * s_threeElement[i].alphabeta_sum);
+			}
+			
+			i++;
+		}
+	}
+	//printf("%d three cluster elements\n", i);
+	
+	// Four element clusters:
+	i = 0;
+	for( int c0 = 0; c0 <= 16; c0++)
+	{
+		for( int c1 = 0; c1 <=  16-c0; c1++)
+		{
+			for( int c2 = 0; c2 <=  16-c0-c1; c2++)
+			{
+				int c3 = 16 - c0 - c1 - c2;
+				
+				/*if (c3 == 16) {
+					// a = b = x3 / 16
+					s_fourElement[i].alpha2_sum = 16.0f;
+					s_fourElement[i].beta2_sum = 0.0f;
+					s_fourElement[i].alphabeta_sum = -16.0f;
+					s_fourElement[i].factor = 1.0f / 256.0f;					
+				}
+				else if (c0 == 16) {
+					// a = b = x0 / 16
+					s_fourElement[i].alpha2_sum = 0.0f;
+					s_fourElement[i].beta2_sum = 16.0f;
+					s_fourElement[i].alphabeta_sum = -16.0f;
+					s_fourElement[i].factor = 1.0f / 256.0f;					
+				}
+				else*/ {
+					s_fourElement[i].alpha2_sum = c0 + c1 * (4.0f/9.0f) + c2 * (1.0f/9.0f);
+					s_fourElement[i].beta2_sum = c3 + c2 * (4.0f/9.0f) + c1 * (1.0f/9.0f);
+					s_fourElement[i].alphabeta_sum = (c1 + c2) * (2.0f/9.0f);
+					s_fourElement[i].factor = 1.0f / (s_fourElement[i].alpha2_sum * s_fourElement[i].beta2_sum - s_fourElement[i].alphabeta_sum * s_fourElement[i].alphabeta_sum);
+				}
+
+				i++;
+			}
+		}
+	}
+	//printf("%d four cluster elements\n", i);
+}
+
 void FastClusterFit::SetMetric(float r, float g, float b)
 {
 #if SQUISH_USE_SIMD

src/nvtt/squish/fastclusterfit.h

@@ -44,6 +44,8 @@ public:
 	void SetMetric(float r, float g, float b);
 	float GetBestError() const;
 
+	static void DoPrecomputation();
+
 	// Make them public
 	virtual void Compress3( void* block );
 	virtual void Compress4( void* block );

src/nvtt/tools/compress.cpp

@@ -42,11 +42,11 @@ struct MyOutputHandler : public nvtt::OutputHandler
 	MyOutputHandler(const char * name) : total(0), progress(0), percentage(0), stream(new nv::StdOutputStream(name)) {}
 	virtual ~MyOutputHandler() { delete stream; }
 	
-	void setTotal(int64 t)
+	virtual void setTotal(int64 t)
 	{
 		total = t + 128;
 	}
-	void setDisplayProgress(bool b)
+	virtual void setDisplayProgress(bool b)
 	{
 		verbose = b;
 	}
@@ -373,6 +373,7 @@ int main(int argc, char *argv[])
 		inputOptions.setMipmapGeneration(false);
 	}
 
+
 	nvtt::CompressionOptions compressionOptions;
 	compressionOptions.setFormat(format);
 	if (fast)
@@ -396,21 +397,6 @@ int main(int argc, char *argv[])
 		compressionOptions.setExternalCompressor(externalCompressor);
 	}
 
-	if (format == nvtt::Format_RGB)
-	{
-		compressionOptions.setQuantization(true, false, false);
-		//compressionOptions.setPixelFormat(16, 0xF000, 0x0F00, 0x00F0, 0x000F);
-		compressionOptions.setPixelFormat(16, 
-			0x0F00, 
-			0x00F0, 
-			0x000F, 
-			0xF000);
-		//	0x003F0000, 
-		//	0x00003F00, 
-		//	0x0000003F, 
-		//	0x3F000000);
-	}
-
 	
 	MyErrorHandler errorHandler;
 	MyOutputHandler outputHandler(output);

src/nvtt/tools/resize.cpp

@@ -73,12 +73,10 @@ int main(int argc, char *argv[])
 
 	float scale = 0.5f;
 	float gamma = 2.2f;
-	nv::AutoPtr<nv::Filter> filter;
+	nv::Filter * filter = NULL;
 	nv::Path input;
 	nv::Path output;
 	
-	nv::FloatImage::WrapMode wrapMode = nv::FloatImage::WrapMode_Mirror;
-
 	// Parse arguments.
 	for (int i = 1; i < argc; i++)
 	{
@@ -110,18 +108,9 @@ int main(int argc, char *argv[])
 			else if (strcmp("lanczos", argv[i]) == 0) filter = new nv::LanczosFilter();
 			else if (strcmp("kaiser", argv[i]) == 0) {
 				filter = new nv::KaiserFilter(3);
-				((nv::KaiserFilter *)filter.ptr())->setParameters(4.0f, 1.0f);
+				((nv::KaiserFilter *)filter)->setParameters(4.0f, 1.0f);
 			}
 		}
-		else if (strcmp("-f", argv[i]) == 0)
-		{
-			if (i+1 == argc) break;
-			i++;
-
-			if (strcmp("mirror", argv[i]) == 0) wrapMode = nv::FloatImage::WrapMode_Mirror;
-			else if (strcmp("repeat", argv[i]) == 0) wrapMode = nv::FloatImage::WrapMode_Repeat;
-			else if (strcmp("clamp", argv[i]) == 0) wrapMode = nv::FloatImage::WrapMode_Clamp;
-		}
 		else if (argv[i][0] != '-')
 		{
 			input = argv[i];
@@ -151,10 +140,6 @@ int main(int argc, char *argv[])
 		printf("                * mitchell\n");
 		printf("                * lanczos\n");
 		printf("                * kaiser\n");
-		printf("  -w mode      One of the following: (default = 'mirror')\n");
-		printf("                * mirror\n");
-		printf("                * repeat\n");
-		printf("                * clamp\n");
 
 		return 1;
 	}
@@ -170,14 +155,15 @@ int main(int argc, char *argv[])
 	nv::FloatImage fimage(&image);
 	fimage.toLinear(0, 3, gamma);
 	
-	nv::AutoPtr<nv::FloatImage> fresult(fimage.resize(*filter, uint(image.width() * scale), uint(image.height() * scale), wrapMode));
+	nv::AutoPtr<nv::FloatImage> fresult(fimage.downSample(*filter, uint(image.width() * scale), uint(image.height() * scale), nv::FloatImage::WrapMode_Mirror));
 	
 	nv::AutoPtr<nv::Image> result(fresult->createImageGammaCorrect(gamma));
-	result->setFormat(nv::Image::Format_ARGB);
 
 	nv::StdOutputStream stream(output);
 	nv::ImageIO::saveTGA(stream, result.ptr());	// @@ Add generic save function. Add support for png too.
 	
+	delete filter;
+	
 	return 0;
 }