ShKernelPostImpl.hpp

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// Sh: A GPU metaprogramming language.
//
// Copyright 2003-2005 Serious Hack Inc.
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
// MA  02110-1301, USA
#ifndef SHUTIL_KERNELPOSTIMPL_HPP 
#define SHUTIL_KERNELPOSTIMPL_HPP 

#include <sstream>
#include "ShSyntax.hpp"
#include "ShPosition.hpp"
#include "ShManipulator.hpp"
#include "ShAlgebra.hpp"
#include "ShProgram.hpp"
#include "ShNibbles.hpp"
#include "ShKernelPost.hpp"
#include "ShFunc.hpp"

namespace ShUtil {

using namespace SH;

template<typename T>
ShProgram shHalftone(const ShBaseTexture2D<T> &tex) {
  ShProgram kernel = SH_BEGIN_FRAGMENT_PROGRAM {
    typename T::InputType SH_NAMEDECL(in, "result");
    ShInputTexCoord2f SH_NAMEDECL(tc, "texcoord");

    typename T::OutputType SH_NAMEDECL(out, "result");

    // TODO rotate color components...
    // TODO decide whether this frac should stay
    out = in > tex(frac(tc));
  } SH_END;
  return kernel;
}

template<int N, typename T>
ShProgram shNoisify(bool useTexture) {
  ShProgram kernel = SH_BEGIN_FRAGMENT_PROGRAM {
    ShInputAttrib1f SH_DECL(noise_scale);
    typename T::InputType SH_NAMEDECL(in, "result");
    ShAttrib<N, SH_INPUT, typename T::storage_type> SH_NAMEDECL(tc, "texcoord");

    typename T::OutputType SH_NAMEDECL(out, "result");

    out = in + cellnoise<T::typesize>(tc, useTexture)*noise_scale; 
  } SH_END;
  return kernel;
}

}

#endif

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