GlScene *GlMetaNodeRenderer::createScene(Graph *metaGraph) const {
GlScene *scene = new GlScene(new GlCPULODCalculator());
GlLayer *layer = new GlLayer("Main");
scene->addExistingLayer(layer);
GlGraphComposite *graphComposite = new GlGraphComposite(metaGraph, scene);
layer->addGlEntity(graphComposite, "graph");
return scene;
}
static void main_loop(Display* dpy, xcb_connection_t *c, xcb_window_t window, uint32_t width, uint32_t height)
{
EglState egl(dpy);
EglSurface surface(egl, (void*)(uintptr_t)window);
GlScene scene;
scene.set_viewport(width, height);
unsigned framenum = 0;
surface.make_current();
surface.swap_buffers();
bool need_exit = false;
xcb_generic_event_t *event;
while (true) {
while ((event = xcb_poll_for_event (c))) {
bool handled = false;
uint8_t response_type = event->response_type & ~0x80;
switch (response_type) {
case XCB_EXPOSE: {
handled = true;
break;
}
case XCB_KEY_PRESS: {
handled = true;
xcb_key_press_event_t *kp = (xcb_key_press_event_t *)event;
if (kp->detail == 24 || kp->detail == 9) {
printf("Exit due to keypress\n");
need_exit = true;
}
break;
}
}
if (!handled) {
// Check if a custom XEvent constructor was registered in xlib for this event type, and call it discarding the constructed XEvent if any.
// XESetWireToEvent might be used by libraries to intercept messages from the X server e.g. the OpenGL lib waiting for DRI2 events.
XLockDisplay(dpy);
Bool (*proc)(Display*, XEvent*, xEvent*) = XESetWireToEvent(dpy, response_type, NULL);
if (proc) {
XESetWireToEvent(dpy, response_type, proc);
XEvent dummy;
event->sequence = LastKnownRequestProcessed(dpy);
proc(dpy, &dummy, (xEvent*)event);
}
XUnlockDisplay(dpy);
}
free(event);
}
if (s_num_frames && framenum >= s_num_frames)
need_exit = true;
if (need_exit)
break;
// this should be in XCB_EXPOSE, but we don't get the event after swaps...
scene.draw(framenum++);
surface.swap_buffers();
}
}
void GlMetaNodeRenderer::render(node n, float, Camera *camera) {
bool viewMeta = _inputData->renderingParameters()
->isDisplayMetaNodes(); // Checks if user wants to see metanode content
bool viewMetaLabels =
_inputData->renderingParameters()
->isViewMetaLabel(); // Checks if user wants to see metanode content labels
if (!viewMeta && !viewMetaLabels) {
return;
}
GLint renderMode;
glGetIntegerv(GL_RENDER_MODE, &renderMode);
if (renderMode == GL_SELECT)
return;
Graph *metaGraph = _inputData->getGraph()->getNodeMetaInfo(n);
GlScene *scene = nullptr;
if (_metaGraphToSceneMap.count(metaGraph) != 0) {
scene = _metaGraphToSceneMap[metaGraph];
} else {
scene = createScene(metaGraph);
assert(scene != nullptr);
_metaGraphToSceneMap[metaGraph] = scene;
metaGraph->addListener(this);
}
scene->getGlGraphComposite()->setRenderingParameters(*(_inputData->renderingParameters()));
int metaStencil = _inputData->renderingParameters()->getMetaNodesStencil();
int metaSelectedStencil = _inputData->renderingParameters()->getSelectedMetaNodesStencil();
int metaLabelStencil = _inputData->renderingParameters()->getMetaNodesLabelStencil();
scene->getGlGraphComposite()->getRenderingParametersPointer()->setDisplayNodes(viewMeta);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setDisplayEdges(viewMeta);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setViewEdgeLabel(viewMetaLabels);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setViewNodeLabel(viewMetaLabels);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setNodesStencil(metaStencil);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setEdgesStencil(metaStencil);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setSelectedNodesStencil(
metaSelectedStencil);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setSelectedEdgesStencil(
metaSelectedStencil);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setNodesLabelStencil(
metaLabelStencil);
scene->getGlGraphComposite()->getRenderingParametersPointer()->setEdgesLabelStencil(
metaLabelStencil);
GlNode glNode(n.id);
BoundingBox includeBB;
_inputData->glyphs.get(_inputData->getElementShape()->getNodeValue(n))
->getIncludeBoundingBox(includeBB, n);
BoundingBox &&bbTmp = glNode.getBoundingBox(_inputData);
BoundingBox bb(bbTmp.center() - Coord((bbTmp.width() / 2.f) * (includeBB[0][0] * -2.f),
(bbTmp.height() / 2.f) * (includeBB[0][1] * -2.f),
(bbTmp.depth() / 2.f) * (includeBB[0][2] * -2.f)),
bbTmp.center() + Coord((bbTmp.width() / 2.f) * (includeBB[1][0] * 2.f),
(bbTmp.height() / 2.f) * (includeBB[1][1] * 2.f),
(bbTmp.depth() / 2.f) * (includeBB[1][2] * 2.f)));
Coord eyeDirection = camera->getEyes() - camera->getCenter();
eyeDirection = eyeDirection / eyeDirection.norm();
Camera newCamera2(*camera);
newCamera2.setEyes(newCamera2.getCenter() +
Coord(0, 0, 1) * (newCamera2.getEyes() - newCamera2.getCenter()).norm());
newCamera2.setUp(Coord(0, 1, 0));
Coord center = camera->worldTo2DViewport((bb[0] + bb[1]) / 2.f);
Coord &&first = newCamera2.worldTo2DViewport(bb[0]);
Coord &&second = newCamera2.worldTo2DViewport(bb[1]);
Coord &&size = second - first;
Vector<int, 4> viewport;
viewport[0] = center[0] - size[0] / 2;
viewport[1] = center[1] - size[1] / 2;
viewport[2] = size[0];
viewport[3] = size[1];
viewport[0] = camera->getViewport()[0] + viewport[0] - viewport[2] / 2;
viewport[1] = camera->getViewport()[1] + viewport[1] - viewport[3] / 2;
viewport[2] *= 2;
viewport[3] *= 2;
if (viewport[2] == 0 || viewport[3] == 0)
return;
scene->setViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
scene->setClearBufferAtDraw(false);
scene->setClearDepthBufferAtDraw(false);
scene->setClearStencilBufferAtDraw(false);
scene->centerScene();
float baseNorm = (scene->getGraphLayer()->getCamera().getEyes() -
scene->getGraphLayer()->getCamera().getCenter())
.norm();
Camera newCamera = scene->getGraphLayer()->getCamera();
Camera *oldCamera = new Camera(scene, true);
newCamera.setScene(scene);
*oldCamera = newCamera;
newCamera.setUp(camera->getUp());
newCamera.setEyes(newCamera.getCenter() + (eyeDirection * baseNorm));
newCamera.setZoomFactor(newCamera.getZoomFactor() * 0.5);
scene->getGraphLayer()->setSharedCamera(&newCamera);
// small hack to avoid z-fighting between the rendering of the metanode content
// and the rendering of the metanode that occurs afterwards
glDepthRange(0.1, 1);
scene->draw();
// restore default depth range
glDepthRange(0, 1);
scene->getGraphLayer()->setCamera(oldCamera);
camera->getScene()->setClearBufferAtDraw(false);
camera->getScene()->setClearDepthBufferAtDraw(false);
camera->getScene()->setClearStencilBufferAtDraw(false);
camera->getScene()->initGlParameters();
camera->getScene()->setClearBufferAtDraw(true);
camera->getScene()->setClearDepthBufferAtDraw(true);
camera->getScene()->setClearStencilBufferAtDraw(true);
camera->initGl();
}
void MouseMagnifyingGlassInteractorComponent::generateMagnifyingGlassTexture(const Coord &magnifyingGlassCenterScr) {
bool antialiased = false;
bool canUseMultisampleFbo = OpenGlConfigManager::getInst().isExtensionSupported("GL_EXT_framebuffer_multisample");
if (QGLFramebufferObject::hasOpenGLFramebufferBlit() && canUseMultisampleFbo) {
antialiased = true;
}
int fboSize = static_cast<int>(radius * 2);
// instantiate fbo if needed
if (fbo == NULL) {
QGLFramebufferObjectFormat fboFormat;
fboFormat.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
if (antialiased) {
fboFormat.setSamples(OpenGlConfigManager::getInst().maxNumberOfSamples());
}
fbo = new QGLFramebufferObject(fboSize, fboSize, fboFormat);
if (antialiased) {
fbo2 = new QGLFramebufferObject(fboSize, fboSize);
}
if (!antialiased) {
GlTextureManager::getInst().registerExternalTexture(textureName, fbo->texture());
}
else {
GlTextureManager::getInst().registerExternalTexture(textureName, fbo2->texture());
}
}
Vector<int, 4> viewport = glWidget->getScene()->getViewport();
// get the magnifying glass bounding box in screen space
BoundingBox boundingBox;
boundingBox[0] = Coord(magnifyingGlassCenterScr.getX() - radius, magnifyingGlassCenterScr.getY() - radius);
boundingBox[1] = Coord(magnifyingGlassCenterScr.getX() + radius, magnifyingGlassCenterScr.getY() + radius);
// compute the zoom factor to apply to scene's camera to get the area under the magnifying glass displayed entirely in the viewport
float bbWidthScreen = boundingBox[1][0] - boundingBox[0][0];
float bbHeightScreen = boundingBox[1][1] - boundingBox[0][1];
float startSize = glWidget->screenToViewport(min(glWidget->width(), glWidget->height()));
float endSize = max(bbHeightScreen, bbWidthScreen);
float zoomFactor = startSize / endSize;
// backup current camera parameters
float sceneRadiusBak = camera->getSceneRadius();
float zoomFactorBak = camera->getZoomFactor();
Coord eyesBak = camera->getEyes();
Coord centerBak = camera->getCenter();
Coord upBak = camera->getUp();
Coord move = boxCenter - centerBak;
camera->setCenter(camera->getCenter() + move);
camera->setEyes(camera->getEyes() + move);
camera->setZoomFactor(magnifyPower * zoomFactor * zoomFactorBak);
glPushAttrib(GL_ALL_ATTRIB_BITS);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
// resize the viewport to the size of fbo and render the scene into this last one
GlScene *scene = glWidget->getScene();
scene->setViewport(0, 0, fboSize, fboSize);
fbo->bind();
Color color = scene->getBackgroundColor();
glClearColor(color.getRGL(), color.getGGL(), color.getBGL(), color.getAGL());
glClear(GL_COLOR_BUFFER_BIT);
scene->draw();
fbo->release();
if (antialiased) {
QGLFramebufferObject::blitFramebuffer(fbo2, QRect(0,0,fboSize, fboSize), fbo, QRect(0,0,fboSize, fboSize));
}
// restore original camera parameters
scene->setViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
camera->setSceneRadius(sceneRadiusBak);
camera->setZoomFactor(zoomFactorBak);
camera->setEyes(eyesBak);
camera->setCenter(centerBak);
camera->setUp(upBak);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glPopAttrib();
// need to call this explicitely otherwise we have to redraw the scene
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
}
