Method grabFramebuffer

src/Gui/View3DInventorViewer.cpp:2894–2933

}

QImage View3DInventorViewer::grabFramebuffer()
{
    auto gl = static_cast<QOpenGLWidget*>(this->viewport());  // NOLINT
    gl->makeCurrent();

    QImage res;
    const SbViewportRegion vp = this->getSoRenderManager()->getViewportRegion();
    SbVec2s size = vp.getViewportSizePixels();
    int width = size[0];
    int height = size[1];

    int samples = getNumSamples();
    if (samples == 0) {
        // if anti-aliasing is off we can directly use glReadPixels
        QImage img(QSize(width, height), QImage::Format_RGB32);
        glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, img.bits());
        res = img;
    }
    else {
        QOpenGLFramebufferObjectFormat fboFormat;
        fboFormat.setSamples(getNumSamples());
        fboFormat.setAttachment(QOpenGLFramebufferObject::Depth);
        fboFormat.setTextureTarget(GL_TEXTURE_2D);
        fboFormat.setInternalTextureFormat(getInternalTextureFormat());

        QOpenGLFramebufferObject fbo(width, height, fboFormat);
        renderToFramebuffer(&fbo);

        res = fbo.toImage(false);

        QImage image(res.width(), res.height(), QImage::Format_RGB32);
        QPainter painter(&image);
        painter.fillRect(image.rect(), Qt::black);
        painter.drawImage(0, 0, res);
        painter.end();
        res = image;
    }

    return res;
}

void View3DInventorViewer::imageFromFramebuffer(
    int width,