Capture.cpp

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/******************************************************************************
*       SOFA, Simulation Open-Framework Architecture, version 1.0 beta 3      *
*                (c) 2006-2008 MGH, INRIA, USTL, UJF, CNRS                    *
*                                                                             *
* 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.          *
*******************************************************************************
*                              SOFA :: Framework                              *
*                                                                             *
* Authors: M. Adam, J. Allard, B. Andre, P-J. Bensoussan, S. Cotin, C. Duriez,*
* H. Delingette, F. Falipou, F. Faure, S. Fonteneau, L. Heigeas, C. Mendoza,  *
* M. Nesme, P. Neumann, J-P. de la Plata Alcade, F. Poyer and F. Roy          *
*                                                                             *
* Contact information: contact@sofa-framework.org                             *
******************************************************************************/
#include <sofa/helper/gl/Capture.h>
#include <sofa/helper/io/ImageBMP.h>
#ifdef SOFA_HAVE_PNG
#include <sofa/helper/io/ImagePNG.h>
#endif

#include <cstdio>
#include <sys/types.h>
#include <sys/stat.h>

namespace sofa
{

    namespace helper
    {

        namespace gl
        {

            Capture::Capture()
                : prefix("capture"), counter(-1)
            {
            }

            bool Capture::saveScreen(const std::string& filename, int compression_level)
            {
#ifdef SOFA_HAVE_PNG
                io::ImagePNG img;
#else
                io::ImageBMP img;
#endif
                GLint viewport[4];
                glGetIntegerv(GL_VIEWPORT,viewport);
                img.init(viewport[2],viewport[3],24);
                glReadBuffer(GL_FRONT);
                glPixelStorei(GL_PACK_ALIGNMENT, 1);
                glReadPixels(viewport[0], viewport[1], viewport[2], viewport[3], GL_RGB, GL_UNSIGNED_BYTE, img.getData());
                
                if (!img.save(filename, compression_level)) return false;
                std::cout << "Saved "<<img.getWidth()<<"x"<<img.getHeight()<<" screen image to "<<filename<<std::endl;
                glReadBuffer(GL_BACK);
                return true;
            }

            std::string Capture::findFilename()
            {
                std::string filename;
                char buf[32];
                int c;
                c = 0;
                struct stat st;
                do
                {
                    ++c;
                    sprintf(buf, "%04d",c);
                    filename = prefix;
                    filename += buf;
#ifdef SOFA_HAVE_PNG
                    filename += ".png";
#else
                    filename += ".bmp";
#endif
                }
                while (stat(filename.c_str(),&st)==0);
                counter = c+1;

                sprintf(buf, "%04d",c);
                filename = prefix;
                filename += buf;
#ifdef SOFA_HAVE_PNG
                filename += ".png";
#else
                filename += ".bmp";
#endif

                return filename;
            }


            bool Capture::saveScreen(int compression_level)
            {
                return saveScreen(findFilename(), compression_level);
            }

        } // namespace gl

    } // namespace helper

} // namespace sofa