processordecoratorgradient.h 3.27 KB
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// ================================================================================================
// 
// This file is part of the CAMPVis Software Framework.
// 
// If not explicitly stated otherwise: Copyright (C) 2012, all rights reserved,
//      Christian Schulte zu Berge <christian.szb@in.tum.de>
//      Chair for Computer Aided Medical Procedures
//      Technische Universität München
//      Boltzmannstr. 3, 85748 Garching b. München, Germany
// For a full list of authors and contributors, please refer to the file "AUTHORS.txt".
// 
// The licensing of this softare is not yet resolved. Until then, redistribution in source or
// binary forms outside the CAMP chair is not permitted, unless explicitly stated in legal form.
// However, the names of the original authors and the above copyright notice must retain in its
// original state in any case.
// 
// Legal disclaimer provided by the BSD license:
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// 
// ================================================================================================

#ifndef PROCESSORDECORATORGRADIENT_H__
#define PROCESSORDECORATORGRADIENT_H__

#include "tgt/textureunit.h"
#include "core/pipeline/abstractprocessordecorator.h"
#include "core/properties/floatingpointproperty.h"
#include "core/properties/genericproperty.h"
#include "core/properties/optionproperty.h"

namespace campvis {

    /**
     * Processor decorator to decorate for all gradient computation methods supported in glsl/tools/gradient.frag.
     * Holds a single option property to select the gradient computation method and implements
     * generateHeader() to define computeGradient(tex, texParams, texCoords) in GLSL calling
     * the selected function.
     */
    class ProcessorDecoratorGradient : public AbstractProcessorDecorator {
    public:
        /// Method for online-calculating gradients
        enum GradientMethod {
            ForwardDifferences,
            CentralDifferences,
            FilteredCentralDifferences,
            SobelFilter
        };

        /// Constructor
        ProcessorDecoratorGradient();
        /// Virtual Destructor
        virtual ~ProcessorDecoratorGradient();

    protected:
        /// \see AbstractProcessorDecorator::addProperties()
        void addProperties(HasPropertyCollection* propCollection);
        /// \see AbstractProcessorDecorator::generateHeader()
        std::string generateHeader() const;

        GenericOptionProperty<GradientMethod> _gradientMethod;  ///< Method for calculating the gradients
    };

}

#endif // PROCESSORDECORATORGRADIENT_H__