From 8c276a0b5eb26608d04c527dc5c968fcf1ea2bfa Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 25 Sep 2008 14:39:57 +0000
Subject: [PATCH] Created new osg2cpp utility that creates .cpp files from
 source shaders that can be included directly in application code, see
 osgvolume for an example.

---
 examples/osg2cpp/CMakeLists.txt |   6 ++
 examples/osg2cpp/osg2cpp.cpp    | 102 ++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 examples/osg2cpp/CMakeLists.txt
 create mode 100644 examples/osg2cpp/osg2cpp.cpp

diff --git a/examples/osg2cpp/CMakeLists.txt b/examples/osg2cpp/CMakeLists.txt
new file mode 100644
index 000000000..896e4580e
--- /dev/null
+++ b/examples/osg2cpp/CMakeLists.txt
@@ -0,0 +1,6 @@
+SET(TARGET_SRC
+    osg2cpp.cpp
+)
+
+#### end var setup  ###
+SETUP_APPLICATION(osg2cpp)
diff --git a/examples/osg2cpp/osg2cpp.cpp b/examples/osg2cpp/osg2cpp.cpp
new file mode 100644
index 000000000..b4e9f2750
--- /dev/null
+++ b/examples/osg2cpp/osg2cpp.cpp
@@ -0,0 +1,102 @@
+#include <osg/ArgumentParser>
+#include <osg/ApplicationUsage>
+
+#include <osgDB/ReadFile>
+#include <osgDB/FileNameUtils>
+
+#include <iostream>
+#include <fstream>
+
+void writeShader(osg::Shader* shader, const std::string& cppFileName, const std::string& variableName)
+{
+    std::ofstream fout(cppFileName.c_str());
+    if (!fout)
+    {
+        std::cout<<"Error: could not open file `"<<cppFileName<<"` for writing."<<std::endl;
+    }
+
+    std::string shaderSource = shader->getShaderSource();
+
+    std::string variableString = std::string("char ")+variableName+std::string("[] = ");
+    
+    std::string::size_type startOfLine = 0;
+    std::string::size_type endOfLine = shaderSource.find_first_of('\n', startOfLine);
+    
+    if (endOfLine==std::string::npos) 
+    {
+        fout<<variableString<<shaderSource<<"\\n\";"<<std::endl;
+    }
+    else
+    {
+        std::string padding(variableString.size(),' ');
+
+        fout<<variableString<<"\""<<shaderSource.substr(startOfLine,endOfLine-startOfLine)<<"\\n\""<<std::endl;
+        startOfLine = endOfLine+1;
+        endOfLine = shaderSource.find_first_of('\n', startOfLine);
+
+        while (endOfLine != std::string::npos)
+        {
+            fout<<padding<<"\""<<shaderSource.substr(startOfLine,endOfLine-startOfLine)<<"\\n\""<<std::endl;
+            startOfLine = endOfLine + 1;
+            endOfLine = shaderSource.find_first_of('\n', startOfLine);
+        }
+        fout<<padding<<"\""<<shaderSource.substr(startOfLine,endOfLine-startOfLine)<<"\\n\";"<<std::endl;
+    }
+    std::cout<<"Written shader to `"<<cppFileName<<"`"<<std::endl;
+}
+
+int main( int argc, char **argv )
+{
+    // use an ArgumentParser object to manage the program arguments.
+    osg::ArgumentParser arguments(&argc,argv);
+    
+    // set up the usage document, in case we need to print out how to use this program.
+    arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
+    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is a utility for converting between various input and output databases formats.");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
+    arguments.getApplicationUsage()->addCommandLineOption("--shader <filename>","Shader file to create a .cpp file for.");
+    arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display command line parameters");
+
+    // if user request help write it out to cout.
+    if (arguments.read("-h") || arguments.read("--help"))
+    { 
+        arguments.getApplicationUsage()->write(std::cout);
+        return 1;
+    }
+    
+    std::string filename;
+    if (arguments.read("--shader",filename))
+    {
+        osg::ref_ptr<osg::Shader> shader = osgDB::readShaderFile(filename);
+        if (shader.valid())
+        {
+            std::string name = osgDB::getStrippedName(filename);
+            std::string invalidCharacters = "-+/\\*=(){}[]:;<>,.?@'~#`!\"";
+            std::string numbericCharacters = "0123456789";
+            std::string::size_type pos = name.find_first_of(invalidCharacters);
+            while (pos != std::string::npos)
+            {
+                name[pos] = '_';
+                pos = name.find_first_of(invalidCharacters);
+            }
+            
+            std::string ext = osgDB::getFileExtension(filename);
+            std::string cppFileName = name + "_" + ext + ".cpp";
+            std::string variableName = name + "_" + ext;
+            writeShader(shader.get(), cppFileName, variableName);
+
+            return 0;
+        }
+        else
+        {
+            std::cout<<"Error: could not found file '"<<filename<<"'"<<std::endl;
+            return 1;
+        }
+        
+    }
+
+    std::cout<<"No appropriate command line options used."<<std::endl;
+
+    arguments.getApplicationUsage()->write(std::cout);
+    return 1;
+}