VRS - The Virtual Rendering System

version 3.3

geometryshaderobject.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2004 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * 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 FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

// $Id:  $
// $Date:  $
// $Revision:  $
// $Author:  $

#ifndef VRS_GL2_GEOMETRYSHADEROBJECT_H
#define VRS_GL2_GEOMETRYSHADEROBJECT_H

#include <vrs/opengl/openglconfig.h>
#include <vrs/opengl/gl2/shaderobject.h>

namespace VRS {
    namespace GL2 {

        class VRS_CORE_API GeometryShaderObject : public ShaderObject {
        public:
            VRS_TYPEINFO(GeometryShaderObject, ShaderObject);
            VRS_SERIALIZABLE(GeometryShaderObject);

            GeometryShaderObject(const std::string& source, GLenum inputType, GLenum outputType, GLuint maxOutputVertices) : 
              ShaderObject(source), inputType_(inputType), outputType_(outputType), maxOutputVertices_(maxOutputVertices) { }
            /*< Valid parameters: 
                  source:     must contain "#version 120" and "#extension GL_EXT_geometry_shader4 : enable"
                  inputType:  GL_POINTS, GL_LINES, GL_LINES_ADJACENCY_EXT, GL_TRIANGLES, GL_TRIANGLES_ADJACENCY_EXT
                  outputType: GL_POINTS, GL_LINE_STRIP, GL_TRIANGLE_STRIP 
                  maxOutputVertices: less than platform-dependent maximum...
            */

            virtual GLenum type() const { return GL_GEOMETRY_SHADER_EXT; }

            void setInputType(GLenum inputType) { inputType_ = inputType; }
            void setOutputType(GLenum outputType) { outputType_ = outputType; }
            void setMaxOutputVertices(GLenum maxOutputVertices) { maxOutputVertices_ = maxOutputVertices; }

            GLenum inputType() const { return inputType_; }
            GLenum outputType() const { return outputType_; }
            GLuint maxOutputVertices() const { return maxOutputVertices_; }

        protected:
            GeometryShaderObject() { } // only for serialization

        private:
            GLenum inputType_;
            GLenum outputType_;
            GLuint maxOutputVertices_;
        }; // class GeometryShaderObject

    } // namespace GL2
} // namespace VRS

#endif // VRS_GL2_GEOMETRYSHADEROBJECT_H

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