Integrate decompressor tool improvements submitted by Amorilia.

src/nvimage/DirectDrawSurface.cpp

@@ -730,6 +730,12 @@ bool DirectDrawSurface::isTextureCube() const
 	return (header.caps.caps2 & DDSCAPS2_CUBEMAP) != 0;
 }
 
+void DirectDrawSurface::setNormalFlag(bool b)
+{
+	nvDebugCheck(isValid());
+	header.setNormalFlag(b);
+}
+
 void DirectDrawSurface::mipmap(Image * img, uint face, uint mipmap)
 {
 	nvDebugCheck(isValid());
@@ -780,7 +786,13 @@ void DirectDrawSurface::readLinearImage(Image * img)
 
 	uint byteCount = (header.pf.bitcount + 7) / 8;
 
-	if (header.pf.amask != 0)
+	// set image format: RGB or ARGB
+	// alpha channel exists if and only if the alpha mask is non-zero
+	if (header.pf.amask == 0)
+ 	{
+		img->setFormat(Image::Format_RGB);
+	}
+	else
 	{
 		img->setFormat(Image::Format_ARGB);
 	}
@@ -808,7 +820,20 @@ void DirectDrawSurface::readBlockImage(Image * img)
 {
 	nvDebugCheck(stream != NULL);
 	nvDebugCheck(img != NULL);
-	
+
+	// set image format: RGB or ARGB
+	if (header.pf.fourcc == FOURCC_RXGB ||
+		header.pf.fourcc == FOURCC_ATI1 ||
+		header.pf.fourcc == FOURCC_ATI2 ||
+		header.pf.flags & DDPF_NORMAL)
+	{
+		img->setFormat(Image::Format_RGB);
+	}
+	else
+	{
+		img->setFormat(Image::Format_ARGB);
+	}
+
 	const uint w = img->width();
 	const uint h = img->height();
 	

src/nvimage/DirectDrawSurface.h

@@ -122,6 +122,8 @@ namespace nv
 		bool isTexture2D() const;
 		bool isTexture3D() const;
 		bool isTextureCube() const;
+
+		void setNormalFlag(bool b);
 		
 		void mipmap(Image * img, uint f, uint m);
 		//	void mipmap(FloatImage * img, uint f, uint m);

src/nvtt/tools/decompress.cpp

@@ -31,41 +31,145 @@
 
 #include "cmdline.h"
 
+#include <time.h> // clock
+
 int main(int argc, char *argv[])
 {
 	MyAssertHandler assertHandler;
 	MyMessageHandler messageHandler;
 
-	if (argc != 2)
-	{
-		printf("NVIDIA Texture Tools - Copyright NVIDIA Corporation 2007\n\n");
-		printf("usage: nvdecompress 'ddsfile'\n\n");
-		return 1;
-	}
+	bool forcenormal = false;
+	bool mipmaps = false;
+	bool faces = false;
 
+	nv::Path input;
+	nv::Path output;
+
+	// Parse arguments.
+	for (int i = 1; i < argc; i++)
+ 	{
+		if (strcmp("-forcenormal", argv[i]) == 0)
+		{
+			forcenormal = true;
+		}
+		else if (strcmp("-mipmaps", argv[i]) == 0)
+		{
+			mipmaps = true;
+		}
+		else if (strcmp("-faces", argv[i]) == 0)
+		{
+			faces = true;
+		}
+		else if (argv[i][0] != '-')
+		{
+			input = argv[i];
+
+			if (i+1 < argc && argv[i+1][0] != '-')
+			{
+				output = argv[i+1];
+			}
+			else
+			{
+				output.copy(input.str());
+				output.stripExtension();
+				output.append(".tga");
+			}
+
+			break;
+		}
+	}
+	
+	printf("NVIDIA Texture Tools - Copyright NVIDIA Corporation 2007\n\n");
+
+	if (input.isNull())
+	{
+		printf("usage: nvdecompress [options] infile [outfile]\n\n");
+
+		printf("Note: the .tga extension is forced on outfile\n\n");
+
+		printf("Input options:\n");
+		printf("  -forcenormal \tThe input image is a normal map.\n");
+		printf("  -mipmaps     \tDecompress all mipmaps.\n");
+		printf("  -faces       \tDecompress all faces.\n");
+
+ 		return 1;
+ 	}
+	
 	// Load surface.
-	nv::DirectDrawSurface dds(argv[1]);
+	nv::DirectDrawSurface dds(input);
 	if (!dds.isValid())
 	{
-		printf("The file '%s' is not a valid DDS file.\n", argv[1]);
+		fprintf(stderr, "The file '%s' is not a valid DDS file.\n", input.str());
 		return 1;
 	}
-	
-	nv::Path name(argv[1]);
-	name.stripExtension();
-	name.append(".tga");
-	
-	nv::StdOutputStream stream(name.str());
-	if (stream.isError()) {
-		printf("Error opening '%s' for writting\n", name.str());
-		return 1;
-	}
-	
-	// @@ TODO: Add command line options to output mipmaps, cubemap faces, etc.
-	nv::Image img;
-	dds.mipmap(&img, 0, 0); // get first image
-	nv::ImageIO::saveTGA(stream, &img);
 
+	if (!dds.isSupported() || dds.isTexture3D())
+	{
+		fprintf(stderr, "The file '%s' is not a supported DDS file.\n", input.str());
+		return 1;
+	}
+	
+	uint faceCount;
+	if (dds.isTexture2D())
+	{
+		faceCount = 1;
+	}
+	else
+	{
+		nvCheck(dds.isTextureCube());
+		faceCount = 6;
+	}
+	
+	uint mipmapCount = dds.mipmapCount();
+	
+	clock_t start = clock();
+ 
+	// apply arguments
+	if (forcenormal)
+	{
+		dds.setNormalFlag(true);
+	}
+	if (!faces)
+	{
+		faceCount = 1;
+	}
+	if (!mipmaps)
+	{
+		mipmapCount = 1;
+	}
+
+	nv::Image mipmap;	
+	nv::Path name;
+
+	// strip extension, we force the tga extension
+	output.stripExtension();
+
+	// extract faces and mipmaps
+	for (uint f = 0; f < faceCount; f++)
+	{
+		for (uint m = 0; m < mipmapCount; m++)
+		{
+			dds.mipmap(&mipmap, f, m);
+	
+			// set output filename, if we are doing faces and/or mipmaps
+			name.copy(output);
+			if (faces) name.appendFormat("_face%d", f);
+			if (mipmaps) name.appendFormat("_mipmap%d", m);
+			name.append(".tga");
+			
+			nv::StdOutputStream stream(name.str());
+			if (stream.isError()) {
+				fprintf(stderr, "Error opening '%s' for writting\n", name.str());
+				return 1;
+			}
+			
+			nv::ImageIO::saveTGA(stream, &mipmap);
+		}
+	}
+
+	clock_t end = clock();
+	printf("\rtime taken: %.3f seconds\n", float(end-start) / CLOCKS_PER_SEC);
+	
 	return 0;
 }