Пример #1
0
void SVG::renderToTexture(const QRectF& textureRect, QGLFramebufferObjectPtr targetFbo)
{
    saveGLState();

    // generate and set view box in logical coordinates
    QRectF viewbox(svgExtents_.x() + textureRect.x() * svgExtents_.width(),
                   svgExtents_.y() + textureRect.y() * svgExtents_.height(),
                   textureRect.width() * svgExtents_.width(),
                   textureRect.height() * svgExtents_.height());
    svgRenderer_.setViewBox(viewbox);

    // Multisampled FBO for anti-aliased rendering
    QGLFramebufferObjectFormat format;
    format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
    format.setSamples(MULTI_SAMPLE_ANTI_ALIASING_SAMPLES);

    QGLFramebufferObjectPtr renderFbo( new QGLFramebufferObject( targetFbo->size(), format ));

    // Render to multisampled FBO
    QPainter painter(renderFbo.get());
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    svgRenderer_.render(&painter);
    painter.end();

    // Copy to texture FBO
    QGLFramebufferObject::blitFramebuffer(
            targetFbo.get(), QRect(0, 0, renderFbo->width(), renderFbo->height()),
            renderFbo.get(), QRect(0, 0, renderFbo->width(), renderFbo->height()));

    glBindTexture(GL_TEXTURE_2D, targetFbo->texture());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    restoreGLState();
}
Пример #2
0
void Thumbnail::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *widget)
{
	QRectF parentRect = parentItem()->sceneBoundingRect();

	// Skip drawing thumbnails outside their parents
	if (!sceneBoundingRect().intersects(parentRect)) return;

    prePaint(painter, widget);

    // Draw image
    if(!img.isNull())
    {
        auto imgRect = QRectF(img.rect());
        imgRect.moveCenter(rect.center());
        painter->drawImage(imgRect.topLeft(), img);
    }

    // Draw 3D mesh
    if(mesh.points.size() || auxMeshes.size())
	{
        if (img.isNull() || isTempImage)
		{
			auto glwidget = (Viewer*)widget;
			if (glwidget)
			{
				QOpenGLContext context;
				context.setShareContext(glwidget->context());
				context.setFormat(glwidget->format());
				context.create();

				QOffscreenSurface m_offscreenSurface;
				m_offscreenSurface.setFormat(context.format());
				m_offscreenSurface.create();

				context.makeCurrent(&m_offscreenSurface);

				QOpenGLFramebufferObjectFormat fboformat;
				fboformat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
				QOpenGLFramebufferObject renderFbo(rect.width() * 2, rect.height() * 2, fboformat);
				renderFbo.bind();

				glwidget->glEnable(GL_DEPTH_TEST);
				glwidget->glEnable(GL_BLEND);
				glwidget->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
				glwidget->glCullFace(GL_BACK);

				glwidget->glClearColor(0,0,0,0);
				glwidget->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
				glwidget->glViewport(0, 0, renderFbo.size().width(), renderFbo.size().height());
				
                if(mesh.points.size())
                    glwidget->drawTriangles(mesh.color, mesh.points, mesh.normals, pvm);

				// Draw aux meshes
				for (auto auxmesh : auxMeshes)
					glwidget->drawTriangles(auxmesh.color, auxmesh.points, auxmesh.normals, pvm);
				
				glwidget->glDisable(GL_DEPTH_TEST);
				glwidget->glFlush();

				renderFbo.release();
                this->setImage( renderFbo.toImage().scaledToWidth(rect.width(), Qt::SmoothTransformation) );

				// Thanks for sharing!
				glwidget->makeCurrent();
			}

			/*painter->beginNativePainting();

			auto glwidget = (Viewer*)widget;
			if (glwidget)
			{
				// Draw mesh
				auto r = sceneBoundingRect();
				auto v = scene()->views().first();
				QPoint viewDelta = v->mapFromScene(r.topLeft());
				if (viewDelta.manhattanLength() > 5) r.moveTopLeft(viewDelta);

				glwidget->eyePos = eye;
				glwidget->pvm = pvm;
				glwidget->glViewport(r.left(), v->height() - r.height() - r.top(), r.width(), r.height());

				// Clipping OpenGL
				glwidget->glEnable(GL_SCISSOR_TEST);
				glwidget->glScissor(parentRect.x(), v->height() - parentRect.height() - parentRect.top(), parentRect.width(), parentRect.height());

				glwidget->glClear(GL_DEPTH_BUFFER_BIT);
				glwidget->drawTriangles(mesh.color, mesh.points, mesh.normals, pvm);

				// Draw aux meshes
				for (auto auxmesh : auxMeshes)
				{
					glwidget->drawTriangles(auxmesh.color, auxmesh.points, auxmesh.normals, pvm);
				}

				glwidget->glDisable(GL_SCISSOR_TEST);
			}

			painter->endNativePainting();*/
		}        
    }
    // Draw the caption
    if(caption.size())
    {
        painter->setPen(QPen(Qt::white,1));
        auto textRect = rect;
        textRect.setHeight(painter->fontMetrics().height() * 1.25);
        textRect.moveBottom(rect.height() - textRect.height() * 0.5);
        painter->drawText(textRect, caption, Qt::AlignVCenter | Qt::AlignHCenter);
    }

    postPaint(painter, widget);
}
Пример #3
0
void ExploreLiveView::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * widget)
{
    if(!isReady) return;

	prePaint(painter);

	postPaint(painter);

	auto glwidget = (Viewer*)widget;
    if (glwidget && meshes.size())
	{
		QRectF parentRect = parentItem()->sceneBoundingRect();

        if (isCacheImage && cachedImage.isNull())
        {
            QOpenGLContext context;
            context.setShareContext(glwidget->context());
            context.setFormat(glwidget->format());
            context.create();

            QOffscreenSurface m_offscreenSurface;
            m_offscreenSurface.setFormat(context.format());
            m_offscreenSurface.create();

            context.makeCurrent(&m_offscreenSurface);

            QOpenGLFramebufferObjectFormat fboformat;
            fboformat.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
            QOpenGLFramebufferObject renderFbo(cacheImageSize*1.5, cacheImageSize, fboformat);
            renderFbo.bind();

            glwidget->glEnable(GL_DEPTH_TEST);
            glwidget->glEnable(GL_BLEND);
            glwidget->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
            glwidget->glCullFace(GL_BACK);

            glwidget->glClearColor(0,0,0,0);
            glwidget->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
            glwidget->glViewport(0, 0, cacheImageSize*1.5, cacheImageSize);

	// XXX Fix
            // glwidget->glPointSize(10);	

            // Draw aux meshes
            for (auto mesh : meshes)
            {
                if (mesh.isPoints)
                    glwidget->drawOrientedPoints(mesh.points, mesh.normals, mesh.color, glwidget->pvm);
                else
                    glwidget->drawTriangles(mesh.color, mesh.points, mesh.normals, glwidget->pvm);
            }

            glwidget->glDisable(GL_DEPTH_TEST);
            glwidget->glFlush();

            renderFbo.release();

            cachedImage = renderFbo.toImage();
            isReady = true;

            // Thanks for sharing!
            glwidget->makeCurrent();
        }

        // Draw as image
        if(isCacheImage)
        {
            int w = shapeRect.width();
            painter->drawImage(w * -0.5, w * -0.5, cachedImage.scaledToWidth(w));
        }

        if(!isCacheImage)
        {
            auto r = shapeRect;

            // scale view
            double s = 1.5;
            r.setWidth(r.width() * s);
            r.setHeight(r.height() * s);

            r.moveCenter(this->mapToScene(boundingRect().center()));

            painter->beginNativePainting();

            auto v = scene()->views().first();
            QPoint viewDelta = v->mapFromScene(r.topLeft());
            if (viewDelta.manhattanLength() > 5) r.moveTopLeft(viewDelta);

            auto camera = ExploreProcess::defaultCamera(document->extent().length());

            glwidget->eyePos = camera.first;
            glwidget->pvm = camera.second;
            glwidget->glViewport(r.left(), v->height() - r.height() - r.top(), r.width(), r.height());

            // Clipping OpenGL
            glwidget->glEnable(GL_SCISSOR_TEST);
            glwidget->glScissor(parentRect.x(), v->height() - parentRect.height() - parentRect.top(), parentRect.width(), parentRect.height());

            glwidget->glClear(GL_DEPTH_BUFFER_BIT);

	// FIX  XXX
            // glwidget->glPointSize(2);

            // Draw aux meshes
            for (auto mesh : meshes)
            {
                if (mesh.isPoints)
                    glwidget->drawOrientedPoints(mesh.points, mesh.normals, mesh.color, glwidget->pvm);
                else
                    glwidget->drawTriangles(mesh.color, mesh.points, mesh.normals, glwidget->pvm);
            }

            glwidget->glDisable(GL_SCISSOR_TEST);

            painter->endNativePainting();
        }
	}
}