void NightModeGraphicsEffect::draw(QPainter* painter)
{
int pixelRatio = painter->device()->devicePixelRatio();
QSize size(painter->device()->width() * pixelRatio, painter->device()->height() * pixelRatio);
if (fbo && fbo->size() != size)
{
delete fbo;
fbo = NULL;
}
if (!fbo)
{
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setInternalTextureFormat(GL_RGBA);
fbo = new NightModeGraphicsEffectFbo(size, format, pixelRatio);
}
QPainter fboPainter(fbo);
drawSource(&fboPainter);
painter->save();
painter->beginNativePainting();
program->bind();
const GLfloat pos[] = {-1, -1, +1, -1, -1, +1, +1, +1};
const GLfloat texCoord[] = {0, 0, 1, 0, 0, 1, 1, 1};
program->setUniformValue(vars.source, 0);
program->setAttributeArray(vars.pos, pos, 2);
program->setAttributeArray(vars.texCoord, texCoord, 2);
program->enableAttributeArray(vars.pos);
program->enableAttributeArray(vars.texCoord);
glBindTexture(GL_TEXTURE_2D, fbo->texture());
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
program->release();
painter->endNativePainting();
painter->restore();
}
//! Initialize the frame buffer objects.
void initFBOs()
{
invariant();
Q_ASSERT_X(useFBO(), Q_FUNC_INFO, "We're not using FBO");
if (NULL == backBuffer)
{
Q_ASSERT_X(NULL == frontBuffer, Q_FUNC_INFO,
"frontBuffer is not null even though backBuffer is");
// If non-power-of-two textures are supported,
// FBOs must have power of two size large enough to fit the viewport.
const QSize bufferSize = nonPowerOfTwoTexturesSupported
? StelUtils::smallestPowerOfTwoSizeGreaterOrEqualTo(viewportSize)
: viewportSize;
// We want a depth and stencil buffer attached to our FBO if possible.
const QGLFramebufferObject::Attachment attachment =
QGLFramebufferObject::CombinedDepthStencil;
backBuffer = new QGLFramebufferObject(bufferSize, attachment);
frontBuffer = new QGLFramebufferObject(bufferSize, attachment);
Q_ASSERT_X(backBuffer->isValid() && frontBuffer->isValid(),
Q_FUNC_INFO, "Framebuffer objects failed to initialize");
}
invariant();
}
MyPaintable(Gui::View3DInventorViewer* v) :view(v), img(v->getGLWidget()->size(), QImage::Format_ARGB32)
{
img.fill(qRgba(255, 255, 255, 0));
{
QPainter p(&img);
p.setPen(Qt::white);
p.drawText(200,200,QString::fromLatin1("Render to QImage"));
}
img = QGLWidget::convertToGLFormat(img);
fbo = new QGLFramebufferObject(v->getGLWidget()->size());
fbo->bind();
//glClear(GL_COLOR_BUFFER_BIT);
fbo->release();
{
QPainter p(fbo);
p.setPen(Qt::white);
p.drawText(200,200,QString::fromLatin1("Render to QGLFramebufferObject"));
p.end();
//img = fbo->toImage();
//img = QGLWidget::convertToGLFormat(img);
}
//fbo->bind();
//glEnable(GL_DEPTH_TEST);
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//glDepthRange(0.1,1.0);
//glEnable(GL_LINE_SMOOTH);
//SoGLRenderAction a(SbViewportRegion(128,128));
//a.apply(v->getSceneManager()->getSceneGraph());
//fbo->release();
//img = fbo->toImage();
//img = QGLWidget::convertToGLFormat(img);
view->getSoRenderManager()->scheduleRedraw();
}
void VideoView::paintGL(QGLPainter *painter)
{
QGLFramebufferObject *fbo = fboSurface->framebufferObject();
if (fbo) {
painter->setStandardEffect(QGL::FlatReplaceTexture2D);
painter->setTexture(QGLTexture2D::fromTextureId(fbo->texture(), fbo->size()));
} else {
painter->setStandardEffect(QGL::LitMaterial);
}
teapot.draw(painter);
}
QGLFramebufferObject *QGLFramebufferObjectPool::acquire(const QSize &requestSize, const QGLFramebufferObjectFormat &requestFormat, bool strictSize)
{
QGLFramebufferObject *chosen = 0;
QGLFramebufferObject *candidate = 0;
for (int i = 0; !chosen && i < m_fbos.size(); ++i) {
QGLFramebufferObject *fbo = m_fbos.at(i);
if (strictSize) {
if (fbo->size() == requestSize && fbo->format() == requestFormat) {
chosen = fbo;
break;
} else {
continue;
}
}
if (fbo->format() == requestFormat) {
// choose the fbo with a matching format and the closest size
if (!candidate || areaDiff(requestSize, candidate) > areaDiff(requestSize, fbo))
candidate = fbo;
}
if (candidate) {
m_fbos.removeOne(candidate);
const QSize fboSize = candidate->size();
QSize sz = fboSize;
if (sz.width() < requestSize.width())
sz.setWidth(qMax(requestSize.width(), qRound(sz.width() * 1.5)));
if (sz.height() < requestSize.height())
sz.setHeight(qMax(requestSize.height(), qRound(sz.height() * 1.5)));
// wasting too much space?
if (sz.width() * sz.height() > requestSize.width() * requestSize.height() * 4)
sz = requestSize;
if (sz != fboSize) {
delete candidate;
candidate = new QGLFramebufferObject(maybeRoundToNextPowerOfTwo(sz), requestFormat);
}
chosen = candidate;
}
}
if (!chosen) {
if (strictSize)
chosen = new QGLFramebufferObject(requestSize, requestFormat);
else
chosen = new QGLFramebufferObject(maybeRoundToNextPowerOfTwo(requestSize), requestFormat);
}
if (!chosen->isValid()) {
delete chosen;
chosen = 0;
}
return chosen;
}
Selection* Sketcher::createSelection(int width, int height)
{
Selection *selection = new Selection();
//selection->setParameters(parameters, parameterNames);
QGLFramebufferObject *fbo = new QGLFramebufferObject(width, height);
glBindTexture(GL_TEXTURE_2D, fbo->texture());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
selection->setSelectionMask(fbo);
this->selections << selection;
return selection;
}
bool QGLViewPickSurface::activate(QGLAbstractSurface *prevSurface)
{
Q_UNUSED(prevSurface);
if (m_fbo)
m_fbo->bind();
return true;
}
// --------------------------------------------------------
void TouchWidgetRenderer::drawMagnifyingGlass(
GLResourceContainer * container,
const MagnifyingGlass * mg,
float alpha ) const
{
// draw contents to fbo
QGLFramebufferObject * fbo = container->framebufferObject("mg_fbo");
drawSceneToFbo(fbo, mg->srcCenter(), mg->srcSize(), mg->angle());
//qDebug() << "drawing mg " << mg << mg->dstCenter() << mg->dstSize();
// draw magnifying glass including contents
QGLShaderProgram * shader = container->shaderProgram("mglass");
shader->bind();
shader->setUniformValue("mglass_tex", 0);
shader->setUniformValue("content_tex", 1);
shader->setUniformValue("alpha", this->alpha()*alpha);
glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, container->texture("mglass"));
glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, fbo->texture());
drawQuad(mg->dstCenter(), mg->dstSize(), -mg->angle(), this->alpha()*alpha);
shader->release();
}
void resizeGL(int width, int height)
{
#if 0
fbObject->bind();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (width <= height) {
glOrtho(0.0, 20.0, 0.0, 20.0 * GLfloat(height) / GLfloat(width),
-10.0, 10.0);
} else {
glOrtho(0.0, 20.0 * GLfloat(width) / GLfloat(height), 0.0, 20.0,
-10.0, 10.0);
}
glMatrixMode(GL_MODELVIEW);
drawTeapots();
fbObject->release();
#else
fbObject->bind();
glDisable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
glEnable(GL_LINE_SMOOTH);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDepthRange(0.1,1.0);
SoGLRenderAction gl(SbViewportRegion(fbObject->size().width(),fbObject->size().height()));
gl.apply(view->getSoRenderManager()->getSceneGraph());
fbObject->release();
#endif
}
void QGLViewPickSurface::deactivate(QGLAbstractSurface *nextSurface)
{
Q_UNUSED(nextSurface);
if (m_fbo)
m_fbo->release();
}
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
}
void paintGL()
{
const SbViewportRegion vp = view->getSoRenderManager()->getViewportRegion();
SbVec2s size = vp.getViewportSizePixels();
glDisable(GL_LIGHTING);
glViewport(0, 0, size[0], size[1]);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glDisable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, fbObject->texture());
glColor3f(1.0, 1.0, 1.0);
GLfloat s = size[0] / GLfloat(fbObject->size().width());
GLfloat t = size[1] / GLfloat(fbObject->size().height());
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0);
glVertex2f(-1.0, -1.0);
glTexCoord2f(s, 0.0);
glVertex2f(1.0, -1.0);
glTexCoord2f(s, t);
glVertex2f(1.0, 1.0);
glTexCoord2f(0.0, t);
glVertex2f(-1.0, 1.0);
glEnd();
if (rubberBandIsShown) {
glMatrixMode(GL_PROJECTION);
glOrtho(0, size[0], size[1], 0, 0, 100);
glMatrixMode(GL_MODELVIEW);
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glLineWidth(4.0);
glColor4f(1.0f, 1.0f, 1.0f, 0.2f);
glRecti(rubberBandCorner1.x(), rubberBandCorner1.y(),
rubberBandCorner2.x(), rubberBandCorner2.y());
glColor4f(1.0, 1.0, 0.0, 0.5);
glLineStipple(3, 0xAAAA);
glEnable(GL_LINE_STIPPLE);
glBegin(GL_LINE_LOOP);
glVertex2i(rubberBandCorner1.x(), rubberBandCorner1.y());
glVertex2i(rubberBandCorner2.x(), rubberBandCorner1.y());
glVertex2i(rubberBandCorner2.x(), rubberBandCorner2.y());
glVertex2i(rubberBandCorner1.x(), rubberBandCorner2.y());
glEnd();
glLineWidth(1.0);
glDisable(GL_LINE_STIPPLE);
glDisable(GL_BLEND);
}
glEnable(GL_LIGHTING);
glEnable(GL_DEPTH_TEST);
}