Added: Textures optimizer tool

--HG--
branch : develop

code/nel/tools/3d/CMakeLists.txt

@@ -35,6 +35,7 @@ IF(WITH_NEL_TOOLS)
   SUBDIRS(
     build_interface
     get_neighbors
+    textures_optimizer
     tga_cut
     tga_resize)
 ENDIF()

code/nel/tools/3d/textures_optimizer/CMakeLists.txt

@@ -0,0 +1,9 @@
+FILE(GLOB SRC *.cpp *.h)
+
+ADD_EXECUTABLE(textures_optimizer ${SRC})
+
+TARGET_LINK_LIBRARIES(textures_optimizer nelmisc)
+NL_DEFAULT_PROPS(textures_optimizer "NeL, Tools, 3D: Textures optimizer")
+NL_ADD_RUNTIME_FLAGS(textures_optimizer)
+
+INSTALL(TARGETS textures_optimizer RUNTIME DESTINATION ${NL_BIN_PREFIX} COMPONENT tools3d)

code/nel/tools/3d/textures_optimizer/main.cpp

@@ -0,0 +1,233 @@
+// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
+// Copyright (C) 2010  Winch Gate Property Limited
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "nel/misc/file.h"
+#include "nel/misc/bitmap.h"
+#include "nel/misc/path.h"
+#include "nel/misc/debug.h"
+
+#include <iostream>
+
+void writeInstructions()
+{
+	std::cout << "Syntax: textures_optimizer [-a] [-g] <input>" << std::endl;
+	std::cout << std::endl;
+	std::cout << "  Try to optimize TGA or PNG textures by removing useless alpha channel or converting a RGB with black and white values to grayscale" << std::endl;
+	std::cout << "  By default, it only make checks and display if texture can optimized or not" << std::endl;
+	std::cout << std::endl;
+	std::cout << "with" << std::endl;
+	std::cout << "-a : Remove alpha channel if useless" << std::endl;
+	std::cout << "-g : Convert to grayscale if all pixels are gray" << std::endl;
+	std::cout << std::endl;
+	std::cout << "-h or -? for this help" << std::endl;
+	std::cout << std::endl;
+}
+
+bool FixAlpha = false;
+bool FixGrayscale = false;
+
+std::vector<std::string> InputFilenames;
+
+bool parseOptions(int argc, char **argv)
+{
+	// process each argument
+	for(sint i = 1; i < argc; ++i)
+	{
+		std::string option = argv[i];
+
+		if (option.length() > 0)
+		{
+			bool isOption = option[0] == '-';
+
+#ifdef NL_OS_WINDOWS
+			// authorize / for options only under Windows,
+			// because under Linux it could be a full path
+			if (!isOption) isOption = (option[0] == '/');
+#endif
+
+			// Option
+			if (isOption)
+			{
+				// remove option prefix
+				option = option.substr(1);
+				
+				// Fix alpha
+				if (option == "a")
+				{
+					FixAlpha = true;
+				}
+				// Fix grayscale
+				else if (option == "g")
+				{
+					FixGrayscale = true;
+				}
+				else if (option == "h" || option == "?")
+				{
+					return false;
+				}
+				else
+				{
+					nlwarning("Unknown option -%s", option.c_str());
+
+					return false;
+				}
+			}
+			// Filename
+			else
+			{
+				std::string ext = NLMISC::toLower(NLMISC::CFile::getExtension(option));
+
+				if (ext == "png" || ext == "tga")
+				{
+					InputFilenames.push_back(option);
+				}
+				else
+				{
+					nlwarning("Only PNG and TGA files supported, %s won't be processed", option.c_str());
+				}
+			}
+		}
+	}
+
+	return !InputFilenames.empty();
+}
+
+#include "nel/misc/system_utils.h"
+
+int main(int argc, char **argv)
+{
+	NLMISC::CApplicationContext applicationContext;
+
+	if (!parseOptions(argc, argv))
+	{
+		writeInstructions();
+		return 0;
+	}
+
+	for(uint i = 0; i < InputFilenames.size(); ++i)
+	{
+		std::string ext = NLMISC::toLower(NLMISC::CFile::getExtension(InputFilenames[i]));
+
+		NLMISC::CIFile input;
+
+		if (!input.open(InputFilenames[i]))
+		{
+			std::cerr << "Unable to open " << InputFilenames[i] << std::endl;
+			return 1;
+		}
+
+		NLMISC::CBitmap bitmap;
+
+		uint8 depth = bitmap.load(input);
+
+		// don't need file so close it
+		input.close();
+
+		if (depth == 0)
+		{
+			std::cerr << "Unable to decode " << InputFilenames[i] << std::endl;
+			return 1;
+		}
+
+		bool modified = false;
+		bool hasAlpha = false;
+		bool isGrayscale = false;
+		
+		if (bitmap.getPixelFormat() == NLMISC::CBitmap::RGBA && depth == 32)
+		{
+			hasAlpha = true;
+		}
+		else if (bitmap.getPixelFormat() == NLMISC::CBitmap::AlphaLuminance)
+		{
+			hasAlpha = true;
+			isGrayscale = true;
+		}
+		else if (bitmap.getPixelFormat() == NLMISC::CBitmap::Luminance)
+		{
+			isGrayscale = true;
+		}
+		else if (bitmap.getPixelFormat() == NLMISC::CBitmap::Alpha)
+		{
+			hasAlpha = true;
+			isGrayscale = true;
+		}
+
+		if (!isGrayscale && bitmap.isGrayscale())
+		{
+			std::cout << InputFilenames[i] << " (grayscale image with RGB colors)" << std::endl;
+
+			if (FixGrayscale)
+			{
+				if (!bitmap.convertToType(hasAlpha ? NLMISC::CBitmap::AlphaLuminance:NLMISC::CBitmap::Luminance))
+				{
+					std::cerr << "Unable to convert to Luminance" << std::endl;
+					return 1;
+				}
+
+				isGrayscale = true;
+				modified = true;
+			}
+		}
+
+		uint8 alpha = 0;
+
+		if (hasAlpha && bitmap.isAlphaUniform(&alpha))
+		{
+			std::cout << InputFilenames[i] << " (image with uniform alpha channel " << alpha << ")" << std::endl;
+
+			if (FixAlpha && (alpha == 0 || alpha == 255))
+			{
+				bitmap.makeOpaque();
+
+				hasAlpha = false;
+				modified = true;
+			}
+		}
+
+		if (!modified) continue;
+
+		NLMISC::COFile output;
+
+		if (!output.open(InputFilenames[i]))
+		{
+			std::cerr << "Unable to open" << std::endl;
+			return 1;
+		}
+
+		uint32 newDepth = isGrayscale ? 8:24;
+
+		if (hasAlpha) newDepth += 8;
+
+		bool res = false;
+
+		if (ext == "png")
+		{
+			res = bitmap.writePNG(output, newDepth);
+		}
+		else if (ext == "tga")
+		{
+			res = bitmap.writePNG(output, newDepth);
+		}
+
+		if (!res)
+		{
+			std::cerr << "Unable to encode" << std::endl;
+			return 1;
+		}
+	}
+
+	return 0;
+}