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();
}
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);
}
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();
}
}
}
