void ShaderEffectSource::updateBackbuffer()
{
if (!m_sourceItem || !QGLContext::currentContext())
return;
// Multisampling is not (for now) supported.
QSize size = QSize(m_sourceItem->width(), m_sourceItem->height());
if (!m_textureSize.isEmpty())
size = m_textureSize;
if (size.height() > 0 && size.width() > 0) {
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setInternalTextureFormat(m_format);
if (!m_fbo) {
m_fbo = new ShaderEffectBuffer(size, format);
} else {
if (!m_fbo->isValid() || m_fbo->size() != size || m_fbo->format().internalTextureFormat() != GLenum(m_format)) {
delete m_fbo;
m_fbo = 0;
m_fbo = new ShaderEffectBuffer(size, format);
}
}
}
// Note that real update for the source content happens in shadereffect.cpp
m_dirtyTexture = false;
}
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();
}
QPaintEngine* QGLPixmapData::paintEngine() const
{
if (!isValid())
return 0;
if (m_renderFbo)
return m_engine;
if (useFramebufferObjects()) {
extern QGLWidget* qt_gl_share_widget();
if (!QGLContext::currentContext())
qt_gl_share_widget()->makeCurrent();
QGLShareContextScope ctx(qt_gl_share_widget()->context());
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setSamples(4);
format.setInternalTextureFormat(GLenum(m_hasAlpha ? GL_RGBA : GL_RGB));
m_renderFbo = qgl_fbo_pool()->acquire(size(), format);
if (m_renderFbo) {
if (!m_engine)
m_engine = new QGL2PaintEngineEx;
return m_engine;
}
qWarning() << "Failed to create pixmap texture buffer of size " << size() << ", falling back to raster paint engine";
}
// If the application wants to paint into the QPixmap, we first
// force it to QImage format and then paint into that.
// This is simpler than juggling multiple GL contexts.
const_cast<QGLPixmapData *>(this)->forceToImage();
if (m_hasFillColor) {
m_source.fill(PREMUL(m_fillColor.rgba()));
m_hasFillColor = false;
}
return m_source.paintEngine();
}
QPaintEngine* QGLPixmapData::paintEngine() const
{
if (!isValid())
return 0;
if (m_renderFbo)
return m_engine;
if (useFramebufferObjects()) {
extern QGLWidget* qt_gl_share_widget();
if (!QGLContext::currentContext())
const_cast<QGLContext *>(qt_gl_share_context())->makeCurrent();
QGLShareContextScope ctx(qt_gl_share_context());
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setSamples(4);
format.setInternalTextureFormat(GLenum(m_hasAlpha ? GL_RGBA : GL_RGB));
m_renderFbo = qgl_fbo_pool()->acquire(size(), format);
if (m_renderFbo) {
if (!m_engine)
m_engine = new QGL2PaintEngineEx;
return m_engine;
}
qWarning() << "Failed to create pixmap texture buffer of size " << size() << ", falling back to raster paint engine";
}
m_dirty = true;
if (m_source.size() != size())
m_source = QImage(size(), QImage::Format_ARGB32_Premultiplied);
if (m_hasFillColor) {
m_source.fill(PREMUL(m_fillColor.rgba()));
m_hasFillColor = false;
}
return m_source.paintEngine();
}
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 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();
}
