void Layer::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
QtPainter *qvpainter = NULL;
#ifdef QT_OPENGL_LIB
QPainter *fboPainter;
QGLFramebufferObject *fbo = NULL;
QGLWidget *qglWidget = qobject_cast<QGLWidget *>(widget);
if (qglWidget) { // on-screen OpenGL
QGLContext *context = const_cast<QGLContext *>(qglWidget->context());
qvpainter = new OpenGLPainter(painter, context);
} else if (cacheMode() != QGraphicsItem::NoCache &&
QGLFramebufferObject::hasOpenGLFramebufferObjects()) {
// caching, try FBO
// if we have direct rendering and FBO support, make use of
// FBO, but this could still just be in software
// NOTE: In Qt 4.6, 'painter' would already target an FBO, if we
// were using the 'OpenGL2' paint engine. We have decided to stick
// with the original engine for now, as the OpenGL2 engine relies
// heavily on shaders, which is slow for our use case.
// Apparently, we must use the QGLContext associated with
// the view being painted. Thus, PlotView tracks whether it is
// inside a paintEvent, so we can get the current QGLWidget.
OverlayScene *overlayScene = qobject_cast<OverlayScene *>(scene());
if (overlayScene)
qglWidget = qobject_cast<QGLWidget *>(overlayScene->view()->viewport());
else {
QList<QGraphicsView *> views = scene()->views();
for (int i = 0; i < views.size() && !qglWidget; i++) {
PlotView *view = qobject_cast<PlotView *>(views[i]);
if (view && view->isPainting())
qglWidget = qobject_cast<QGLWidget *>(view->viewport());
}
}
if (qglWidget) {
QSize size(painter->device()->width(), painter->device()->height());
QGLContext *context = const_cast<QGLContext *>(qglWidget->context());
// GC during paint callback may have reset this
if (qglWidget->context() != QGLContext::currentContext())
qglWidget->makeCurrent();
// NOTE: need Qt 4.6 for antialiasing to work with FBOs
#if QT_VERSION >= 0x40600
if (!fboMultisamplingFailed) {
QGLFramebufferObjectFormat fboFormat;
fboFormat.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
fboFormat.setSamples(4); // 4X antialiasing should be enough?
qInstallMsgHandler(fboDebugMsgCatcher);
fbo = new QGLFramebufferObject(size, fboFormat);
qInstallMsgHandler(0);
if (fboMultisamplingFailed) {
delete fbo;
fbo = NULL;
}
}
#endif
if (!fbo)
fbo = new QGLFramebufferObject(size);
// clear the FBO
fboPainter = new QPainter(fbo);
fboPainter->setCompositionMode(QPainter::CompositionMode_Source);
fboPainter->fillRect(0, 0, size.width(), size.height(), Qt::transparent);
fboPainter->setCompositionMode(QPainter::CompositionMode_SourceOver);
qvpainter = new OpenGLPainter(fboPainter, context);
qvpainter->setTransform(painter->worldTransform());
}
}
#endif
if (!qvpainter) // fallback to Qt renderer
qvpainter = new QtPainter(painter);
// NOTE: in QT 4.6 exposedRect will just be the bounding rect, by default
paintPlot(qvpainter, option->exposedRect);
delete qvpainter;
#ifdef QT_OPENGL_LIB
if (fbo) { // silliness: download to image, only to upload to texture
painter->setWorldMatrixEnabled(false);
qglWidget->makeCurrent(); // gc during callback may have cleared this
// need to tell Qt that 'fboImage' is actually premultiplied
QImage fboImage = fbo->toImage();
const uchar *data = fboImage.bits(); // no deep copy
QImage premultImage = QImage(data,
fboImage.width(),
fboImage.height(),
QImage::Format_ARGB32_Premultiplied);
// Not sure why this can't be (0, 0)...
painter->drawImage(QPointF(1, -1), premultImage);
delete fboPainter;
delete fbo;
}
#endif
}
GLWidget::GLWidget(QWidget *parent)
: QGLWidget(QGLFormat(QGL::SampleBuffers|QGL::AlphaChannel), parent)
{
setWindowTitle(tr("OpenGL framebuffer objects"));
makeCurrent();
if (QGLFramebufferObject::hasOpenGLFramebufferBlit()) {
QGLFramebufferObjectFormat format;
format.setSamples(4);
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
render_fbo = new QGLFramebufferObject(512, 512, format);
texture_fbo = new QGLFramebufferObject(512, 512);
} else {
render_fbo = new QGLFramebufferObject(1024, 1024);
texture_fbo = render_fbo;
}
rot_x = rot_y = rot_z = 0.0f;
scale = 0.1f;
anim = new QTimeLine(750, this);
anim->setUpdateInterval(20);
connect(anim, SIGNAL(valueChanged(qreal)), SLOT(animate(qreal)));
connect(anim, SIGNAL(finished()), SLOT(animFinished()));
svg_renderer = new QSvgRenderer(QLatin1String(":/res/bubbles.svg"), this);
connect(svg_renderer, SIGNAL(repaintNeeded()), this, SLOT(draw()));
logo = QImage(":/res/designer.png");
logo = logo.convertToFormat(QImage::Format_ARGB32);
tile_list = glGenLists(1);
glNewList(tile_list, GL_COMPILE);
glBegin(GL_QUADS);
{
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
}
glEnd();
glEndList();
wave = new GLfloat[logo.width()*logo.height()];
memset(wave, 0, logo.width()*logo.height());
startTimer(30); // wave timer
}
void FrameInfo::resize(uint w, uint h)
// ----------------------------------------------------------------------------
// Change the size of the frame buffer used for rendering
// ----------------------------------------------------------------------------
{
assert(QGLContext::currentContext() ||
!"FrameInfo::resize without an OpenGL context???");
// Don't change anything if size stays the same
if (renderFBO && renderFBO->width()==int(w) && renderFBO->height()==int(h))
return;
IFTRACE(fbo)
std::cerr << "[FrameInfo] Resize " << w << "x" << h << "\n";
GraphicSave *save = GL.Save();
// Delete anything we might have
purge();
// If the size is too big, we shouldn't use multisampling, it crashes
// on MacOSX
const uint SAMPLES = 4;
const uint maxTextureSize = GL.MaxTextureSize();
bool canMultiSample = QGLFramebufferObject::hasOpenGLFramebufferBlit() &&
TaoApp->hasFBOMultisample;
if (w >= maxTextureSize || h >= maxTextureSize)
{
IFTRACE(fbo)
std::cerr << "[FrameInfo] Disable multisample, too big "
<< maxTextureSize << "\n";
canMultiSample = false;
}
// Select whether we draw directly in texture or blit to it
// If we can blit and suceed in creating a multisample buffer,
// we first draw in a multisample buffer
// with 4 samples per pixel. This cannot be used directly as texture.
QGLFramebufferObjectFormat format;
format.setInternalTextureFormat(this->format);
// Enable mipmap for fbo
if(PerformancesPage::texture2DMipmap())
format.setMipmap(true);
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
if (canMultiSample)
{
QGLFramebufferObjectFormat mformat(format);
mformat.setSamples(SAMPLES);
renderFBO = new QGLFramebufferObject(w, h, mformat);
// REVISIT: we pass format to have a depth buffer attachment.
// This is required only when we want to later use depthTexture().
// TODO: specify at object creation?
textureFBO = new QGLFramebufferObject(w, h, format);
}
else
{
renderFBO = new QGLFramebufferObject(w, h, format);
textureFBO = renderFBO;
}
// The value of the min and mag filters of the underlying texture
// are forced to GL_NEAREST by Qt, which are not the GL defaults.
// => We must synchronize our cache or some later GL.TexParameter calls
// may be ignored.
GLint min, mag;
GLuint tex = textureFBO->texture();
glBindTexture(GL_TEXTURE_2D, tex);
// Query the actual values to be safe
glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, &min);
glGetTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, &mag);
glBindTexture(GL_TEXTURE_2D, 0);
GL.BindTexture(GL_TEXTURE_2D, tex);
GL.TexParameter(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, min);
GL.TexParameter(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, mag);
if(PerformancesPage::texture2DMipmap())
GL.GenerateMipmap(GL_TEXTURE_2D);
GL.Sync(STATE_textures);
GL.BindTexture(GL_TEXTURE_2D, 0);
// depthTextureID is optional, resize if we have one
if (depthTextureID)
resizeDepthTexture(w, h);
// Store what context we created things in
this->w = w; this->h = h;
this->context = (QGLContext *) QGLContext::currentContext();
IFTRACE(fbo)
std::cerr << "[FrameInfo] Resized " << w << "x" << h
<< " in " << context << "\n";
GL.Restore(save);
// Clear the contents of the newly created frame buffer
begin(true);
end();
}
bool AmbientOcclusionPlugin::applyFilter(QAction *filter, MeshDocument &md, RichParameterSet & par, vcg::CallBackPos *cb)
{
MeshModel &m=*(md.mm());
if(ID(filter)==FP_FACE_AMBIENT_OCCLUSION ) perFace=true;
else perFace = false;
useGPU = par.getBool("useGPU");
useVBO = par.getBool("useVBO");
depthTexSize = par.getInt("depthTexSize");
depthTexArea = depthTexSize*depthTexSize;
numViews = par.getInt("reqViews");
errInit = false;
float dirBias = par.getFloat("dirBias");
Point3f coneDir = par.getPoint3f("coneDir");
float coneAngle = par.getFloat("coneAngle");
if(perFace)
m.updateDataMask(MeshModel::MM_FACEQUALITY | MeshModel::MM_FACECOLOR);
else
m.updateDataMask(MeshModel::MM_VERTQUALITY | MeshModel::MM_VERTCOLOR);
std::vector<Point3f> unifDirVec;
GenNormal<float>::Uniform(numViews,unifDirVec);
std::vector<Point3f> coneDirVec;
GenNormal<float>::UniformCone(numViews, coneDirVec, math::ToRad(coneAngle), coneDir);
std::random_shuffle(unifDirVec.begin(),unifDirVec.end());
std::random_shuffle(coneDirVec.begin(),coneDirVec.end());
int unifNum = floor(unifDirVec.size() * (1.0 - dirBias ));
int coneNum = floor(coneDirVec.size() * (dirBias ));
viewDirVec.clear();
viewDirVec.insert(viewDirVec.end(),unifDirVec.begin(),unifDirVec.begin()+unifNum);
viewDirVec.insert(viewDirVec.end(),coneDirVec.begin(),coneDirVec.begin()+coneNum);
numViews = viewDirVec.size();
this->glContext->makeCurrent();
this->initGL(cb,m.cm.vn);
unsigned int widgetSize = std::min(maxTexSize, depthTexSize);
QSize fbosize(widgetSize,widgetSize);
QGLFramebufferObjectFormat frmt;
frmt.setInternalTextureFormat(GL_RGBA);
frmt.setAttachment(QGLFramebufferObject::Depth);
QGLFramebufferObject fbo(fbosize,frmt);
qDebug("Start Painting window size %i %i", fbo.width(), fbo.height());
GLenum err = glGetError();
fbo.bind();
processGL(m,viewDirVec);
fbo.release();
err = glGetError();
const GLubyte* errname = gluErrorString(err);
qDebug("End Painting");
this->glContext->doneCurrent();
return !errInit;
}
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]);
}
void QwtPlotGLCanvas::paintGL()
{
const bool hasFocusIndicator =
hasFocus() && focusIndicator() == CanvasFocusIndicator;
QPainter painter;
#if QT_VERSION < 0x040600
painter.begin( this );
draw( &painter );
#else
if ( testPaintAttribute( QwtPlotGLCanvas::BackingStore ) )
{
if ( d_data->fbo == NULL || d_data->fbo->size() != size() )
{
invalidateBackingStore();
const int numSamples = 16;
QGLFramebufferObjectFormat format;
format.setSamples( numSamples );
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
QGLFramebufferObject fbo( size(), format );
QPainter fboPainter( &fbo );
draw( &fboPainter);
fboPainter.end();
d_data->fbo = new QGLFramebufferObject( size() );
QRect rect(0, 0, width(), height());
QGLFramebufferObject::blitFramebuffer(d_data->fbo, rect, &fbo, rect);
}
// drawTexture( QRectF( -1.0, 1.0, 2.0, -2.0 ), d_data->fbo->texture() );
if ( hasFocusIndicator )
painter.begin( this );
glBindTexture(GL_TEXTURE_2D, d_data->fbo->texture());
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(-1.0f, -1.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex2f( 1.0f, -1.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex2f( 1.0f, 1.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex2f(-1.0f, 1.0f);
glEnd();
}
else
{
painter.begin( this );
draw( &painter );
}
#endif
if ( hasFocus() && focusIndicator() == CanvasFocusIndicator )
drawFocusIndicator( &painter );
}
void RenderHelper::renderScene(vcg::Shotf &view, MeshModel *mesh, RenderingMode mode, float camNear = 0, float camFar = 0)
{
int wt = view.Intrinsics.ViewportPx[0];
int ht = view.Intrinsics.ViewportPx[1];
rendmode = mode;
QSize fbosize(wt, ht);
QGLFramebufferObjectFormat frmt;
frmt.setInternalTextureFormat(GL_RGBA);
frmt.setAttachment(QGLFramebufferObject::Depth);
QGLFramebufferObject fbo(fbosize,frmt);
float _near, _far;
if((camNear <= 0) || (camFar == 0)) // if not provided by caller, then evaluate using bbox
{
_near=0.1;
_far=20000;
GlShot< vcg::Shot<float> >::GetNearFarPlanes(view, mesh->cm.bbox, _near, _far);
if(_near <= 0) _near = 0.01;
if(_far < _near) _far = 1000;
}
else
{
_near = camNear;
_far = camFar;
}
assert(_near <= _far);
GLenum err = glGetError();
//render to FBO
fbo.bind();
glViewport(0, 0, wt, ht);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GlShot< vcg::Shot<float> >::SetView(view, _near, _far);
err = glGetError();
bool use_colors=false;
bool use_normals=false;
if(rendmode == NORMAL)
use_normals = true;
if(rendmode == COLOR)
use_colors = true;
int program = programs[rendmode];
glDisable(GL_LIGHTING);
//bind indices
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, ibo);
//bind vertices
glEnable(GL_COLOR_MATERIAL);
glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
glEnableClientState(GL_VERTEX_ARRAY); // activate vertex coords array
glVertexPointer(3, GL_FLOAT, 0, 0); // last param is offset, not ptr
err = glGetError();
glUseProgram(program);
err = glGetError();
if(use_colors)
{
glBindBufferARB(GL_ARRAY_BUFFER_ARB, cbo);
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_UNSIGNED_BYTE, 0, 0);
}
if(use_normals)
{
glBindBufferARB(GL_ARRAY_BUFFER_ARB, nbo);
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, 0, 0);
}
err = glGetError();
if (mesh->cm.fn > 0)
{
glDrawElements(GL_TRIANGLES, mesh->cm.fn*3, GL_UNSIGNED_INT, (void *)0);
}
else
{
glDrawArrays(GL_POINTS, 0, mesh->cm.vn);
}
if(color != NULL) delete []color;
if(depth != NULL) delete []depth;
color = new unsigned char[wt * ht * 3];
depth = new floatbuffer();
depth->init(wt,ht);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels( 0, 0, wt, ht, GL_RGB, GL_UNSIGNED_BYTE, color);
glReadPixels( 0, 0, wt, ht, GL_DEPTH_COMPONENT, GL_FLOAT, depth->data);
//----- convert depth in world units
mindepth = 1000000;
maxdepth = -1000000;
for(int pixit = 0; pixit<wt*ht; pixit++)
{
if (depth->data[pixit] == 1.0)
depth->data[pixit] = 0;
else
depth->data[pixit] = _near*_far / (_far - depth->data[pixit]*(_far-_near));
// min and max for normalization purposes (e.g. weighting)
if(depth->data[pixit] > maxdepth)
maxdepth = depth->data[pixit];
if(depth->data[pixit] > maxdepth)
maxdepth = depth->data[pixit];
}
//-----
err = glGetError();
glDisableClientState(GL_VERTEX_ARRAY); // deactivate vertex array
if(use_colors) glDisableClientState(GL_COLOR_ARRAY);
if(use_normals) glDisableClientState(GL_NORMAL_ARRAY);
err = glGetError();
// bind with 0, so, switch back to normal pointer operation
glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
glEnable(GL_LIGHTING);
// standard opengl pipeline is re-activated
glUseProgram(0);
GlShot< vcg::Shot<float> >::UnsetView();
glFinish();
//QImage l=fbo.toImage();
//l.save("rendering.jpg");
fbo.release();
}
