Method captureSceneScreenShot

source/MRViewer/MRViewer.cpp:2519–2611

}

Image Viewer::captureSceneScreenShot( const Vector2i& resolution, bool transparentBg /*= false*/ )
{
    if ( !glInitialized_ )
        return {};

    Vector2i newRes;
    newRes.x = resolution.x <= 0 ? framebufferSize.x : resolution.x;
    newRes.y = resolution.y <= 0 ? framebufferSize.y : resolution.y;

    // store old sizes
    auto vpBounbds = getViewportsBounds();
    std::vector<ViewportRectangle> rects;
    std::vector<Viewport::Parameters> viewportParams;
    for ( auto& viewport : viewport_list )
    {
        auto rect = viewport.getViewportRect();
        rects.push_back( rect );
        rect.min.x = float( rect.min.x - vpBounbds.min.x ) / width( vpBounbds ) * newRes.x;
        rect.min.y = float( rect.min.y - vpBounbds.min.y ) / height( vpBounbds ) * newRes.y;
        rect.max.x = float( rect.max.x - vpBounbds.min.x ) / width( vpBounbds ) * newRes.x;
        rect.max.y = float( rect.max.y - vpBounbds.min.y ) / height( vpBounbds ) * newRes.y;
        viewport.setViewportRect( rect );
    }
    if ( transparentBg )
    {
        for ( int i = 0; i < viewport_list.size(); ++i )
        {
            auto& viewport = viewport_list[i];
            viewportParams.resize( viewport_list.size() );
            auto viewportParamsNew = viewport.getParameters();
            viewportParams[i] = viewportParamsNew;
            viewportParamsNew.backgroundColor = Color::transparent();
            viewportParamsNew.borderColor = Color::transparent();
            viewport.setParameters( viewportParamsNew );
        }
    }
    if ( newRes != framebufferSize )
    {
        if ( alphaSorter_ )
            alphaSorter_->updateTransparencyTexturesSize( newRes.x, newRes.y );
        if ( depthPeeler_ )
            depthPeeler_->reset( newRes );
    }

    std::vector<Color> pixels( newRes.x * newRes.y );

    FramebufferData fd;
    fd.gen( newRes, bool( depthPeeler_ ), -1 );
    fd.bind();

    setupScene();
    clearFramebuffers();
    drawScene( &fd );

    fd.copyTextureBindDef();
    fd.bindTexture( true, false ); // only bind color

#ifdef __EMSCRIPTEN__