RenderModeGL.hh

#ifndef __RenderModeGL_h__
#define __RenderModeGL_h__

#include <bias_config.h>
#ifndef BIAS_HAVE_OPENGL
#  error Please recompile BIAS with USE_OPENGL to use ImgObjGL
#endif // BIAS_HAVE_OPENGL

#include "biasgl.h"

#include <Base/Math/Vector4.hh>

// used by glClear
#ifndef CLEAR_DEFAULT_MASK
#  define CLEAR_DEFAULT_MASK  GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_ACCUM_BUFFER_BIT | GL_STENCIL_BUFFER_BIT
#endif // CLEAR_DEFAULT_MASK

namespace BIAS {

    enum  DrawbufferMode {
        MONO=0 /* one display but possibly double buffered */
        ,STEREO_UNTOUCHED /* do not touch selcting the DrawBuffer, user is doing it himself */
        ,STEREO_CONSUMER_NV /* consumer 3D stereo using NV driver. works only in fullscreen */
        ,STEREO_QUADBUFFERED /* page flipping quad buffered stereo, e.g. with consumer shutter glasses like Elsa Revelator */
        ,STEREO_LEFT_RIGHT /* stereo without sdouble buffering */
        ,STEREO_TWOSCREENS /* two monitors, e.g. HMD or polarized glasses */
        //,STEREO_ANAGLYPH_RG /* anaglyph using left:red right: green (with one screen) */
        //,STEREO_ANAGLYPH_GR /* anaglyph using green-red */
        //,STEREO_ANAGLYPH_RB /* anaglyph using red-blue */
        //,STEREO_ANAGLYPH_BR /* anaglyph using blue-red*/
    };

        /** 
        @ingroup g_gui
        @brief GLRenderMode describes mode for rendering.
        
        In particular 
        #culling, 
        #pointsize, 
        #linesize, 
        #buffer mode (wireframe, points..) 
        #stereo mod e(e.g. page flipping) for display.
        # etc...
        @author Jan Woetzel  */
    class BIASGui_EXPORT RenderModeGL {
    public: 
        RenderModeGL()
        {
            polygonmodeFRONT=GL_FILL;
            polygonmodeBACK=GL_FILL;
            shademodel=GL_SMOOTH;

            enable_cullface=false;
            cullface=GL_BACK;

            pointsize=1.0f;
            linewidth=1.0f;

            // handled extra by Display function 
            // because it has to match SwapBuffers
            drawbuffermode=BIAS::STEREO_UNTOUCHED;
            //drawbuffermode=BIAS::STEREO_CONSUMER_NV;
            vsync=false;
        };

        /** no 3D streo enabled, single viewpoint only? */
        bool IsMono() const {return (drawbuffermode==BIAS::MONO);};

        /** page flipping quad buffered stereo?
        E.g. with consumer shutter glasses like Elsa Revelator  */
        bool IsStereoQuadbuffered() const {return (drawbuffermode==BIAS::STEREO_QUADBUFFERED);};

        // members:

        // GL_FILL, GL_FLAT, GL_POINT
        GLenum polygonmodeFRONT; ///< glPoygonMode(GL_FRONT...
        GLenum polygonmodeBACK;  ///< glPoygonMode(GL_BACK...

        // GL_SMOOTH, GL_FLAT
        GLenum shademodel; ///< glShadeModel(...

        bool enable_cullface;
        GLenum cullface; ///< glCullFace: GL_FRONT, GL_BACK, and GL_FRONT_AND_BACK 

        float pointsize;
        float linewidth;

        // 3D display using shutter glasses or multiple monitors with polarizers?
        BIAS::DrawbufferMode drawbuffermode; // enable page swap stereo, e.g. with shutetr glasses

        bool vsync; // true to enable vertical sync
    };
} // namespace BIAS

#endif