double.cpp

/*
 *  This example shows PAGE FLIPPING feature of OpenGUI library
 *
 *  requirement: 1MB videocards (2MB for 16bit colors or 4MB for true colors)
 *  FPS (frames per secs) is based on monitor frequency & CPU speed heavily
*/

#include <fastgl/fastgl.h>


void animate(void)
{
    static int i=0,j=200,l=2000;
    fgl::clear_frame_buffer(fgl::CWHITE);
    fgl::fill_ellipse(fgl::GetXRes()/2, fgl::GetYRes()/2,i,j, fgl::CBLACK, fgl::_GSET);
    fgl::fill_ellipse(fgl::GetXRes()/2, fgl::GetYRes()/2,j,i, fgl::CBLACK, fgl::_GSET);
    i++;
    if (i==200) i=0;
    j--;
    if (j==0) j=200;
    fgl::cApp->Flip();
    if (l-- == 0) fgl::FGApp::AppDone(); // return after 2000 frames
}

int main(int argc, char **argv)
{
    fgl::FGApp app(fgl::G640x480, argc, argv, fgl::CBLACK, fgl::APP_ENABLEALTX);

    // you can use FG_DOUBLEBUFFER or FG_QUADBUFFER
    // NOTE: DOUBLEBUFFER is flicker on some cards & drivers (nVIDIA)
    app.EnableBuffering(fgl::FG_TRIPLEBUFFER);

    // set main loop code
    app.SetDelayProc(animate);

    // go!
    app.Run();

    app.DisableBuffering();
    return 0;
}

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