source: downloads/Samples/DeferredShading/src/MaterialGenerator.cpp @ 1

/******************************************************************************
Copyright (c) W.J. van der Laan

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#include "MaterialGenerator.h"

#include "OgreStringConverter.h"
#include "OgreException.h"

#include "OgrePass.h"
#include "OgreTechnique.h"

#include "OgreHighLevelGpuProgram.h"
#include "OgreHighLevelGpuProgramManager.h"

using namespace Ogre;

MaterialGenerator::MaterialGenerator():
        vsMask(0), fsMask(0), matMask(0), mImpl(0)
{
}
MaterialGenerator::~MaterialGenerator()
{
        delete mImpl;
}

const Ogre::MaterialPtr &MaterialGenerator::getMaterial(Perm permutation)
{
        /// Check input validity
        size_t totalBits = bitNames.size();
        size_t totalPerms = 1<<totalBits;
        assert(permutation < totalPerms);

        /// Check if material/shader permutation already was generated
        MaterialMap::iterator i = mMaterials.find(permutation);
        if(i != mMaterials.end())
        {
                return i->second;
        }
        else
        {
                /// Create it
                Ogre::MaterialPtr templ = getTemplateMaterial(permutation & matMask);
                Ogre::GpuProgramPtr vs = getVertexShader(permutation & vsMask);
                Ogre::GpuProgramPtr fs = getFragmentShader(permutation & fsMask);
                
                /// Create material name
                String name=materialBaseName;
                for(size_t bit=0; bit<totalBits; ++bit)
                        if(permutation & (1<<bit))
                                name += bitNames[bit];

                std::cerr << name << " " << vs->getName() << " " << fs->getName() << std::endl;
                /// Create material from template, and set shaders
                MaterialPtr mat = templ->clone(name);
                Technique *tech = mat->getTechnique(0);
                Pass *pass = tech->getPass(0);
                pass->setFragmentProgram(fs->getName());
                pass->setVertexProgram(vs->getName());

                /// And store it
                mMaterials[permutation] = mat;
                return mMaterials[permutation];
        }
}

const Ogre::GpuProgramPtr &MaterialGenerator::getVertexShader(Perm permutation)
{
        ProgramMap::iterator i = mVs.find(permutation);
        if(i != mVs.end())
        {
                return i->second;
        }
        else
        {
                /// Create it
                mVs[permutation] = mImpl->generateVertexShader(permutation);
                return mVs[permutation];
        }
}

const Ogre::GpuProgramPtr &MaterialGenerator::getFragmentShader(Perm permutation)
{
        ProgramMap::iterator i = mFs.find(permutation);
        if(i != mFs.end())
        {
                return i->second;
        }
        else
        {
                /// Create it
                mFs[permutation] = mImpl->generateFragmentShader(permutation);
                return mFs[permutation];
        }
}

const Ogre::MaterialPtr &MaterialGenerator::getTemplateMaterial(Perm permutation)
{
        MaterialMap::iterator i = mTemplateMat.find(permutation);
        if(i != mTemplateMat.end())
        {
                return i->second;
        }
        else
        {
                /// Create it
                mTemplateMat[permutation] = mImpl->generateTemplateMaterial(permutation);
                return mTemplateMat[permutation];
        }
}

MaterialGenerator::Impl::~Impl()
{
}