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Diffstat (limited to 'src/player/OffscreenCanvas.cpp')
| -rw-r--r-- | src/player/OffscreenCanvas.cpp | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/src/player/OffscreenCanvas.cpp b/src/player/OffscreenCanvas.cpp new file mode 100644 index 0000000..758bf43 --- /dev/null +++ b/src/player/OffscreenCanvas.cpp @@ -0,0 +1,271 @@ +// +// libavg - Media Playback Engine. +// Copyright (C) 2003-2014 Ulrich von Zadow +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// Current versions can be found at www.libavg.de +// + +#include "OffscreenCanvas.h" + +#include "CanvasNode.h" +#include "Player.h" + +#include "../base/Exception.h" +#include "../base/ProfilingZoneID.h" +#include "../base/ObjectCounter.h" +#include "../base/ScopeTimer.h" + +#include "../graphics/FilterUnmultiplyAlpha.h" +#include "../graphics/BitmapLoader.h" + +#include <iostream> + +using namespace boost; +using namespace std; + +namespace avg { + +OffscreenCanvas::OffscreenCanvas(Player * pPlayer) + : Canvas(pPlayer), + m_bIsRendered(false), + m_pCameraNodeRef(0) +{ + ObjectCounter::get()->incRef(&typeid(*this)); +} + +OffscreenCanvas::~OffscreenCanvas() +{ + ObjectCounter::get()->decRef(&typeid(*this)); +} + +void OffscreenCanvas::setRoot(NodePtr pRootNode) +{ + Canvas::setRoot(pRootNode); + if (!getRootNode()) { + throw (Exception(AVG_ERR_XML_PARSE, + "Root node of a canvas tree needs to be a <canvas> node.")); + } +} + +void OffscreenCanvas::initPlayback() +{ + m_bUseMipmaps = getMipmap(); + PixelFormat pf; + if (BitmapLoader::get()->isBlueFirst()) { + pf = B8G8R8A8; + } else { + pf = R8G8B8A8; + } + bool bUseDepthBuffer = GLContext::getMain()->useDepthBuffer(); + m_pFBO = FBOPtr(new FBO(getSize(), pf, 1, getMultiSampleSamples(), bUseDepthBuffer, + true, m_bUseMipmaps)); + Canvas::initPlayback(getMultiSampleSamples()); + m_bIsRendered = false; +} + +void OffscreenCanvas::stopPlayback(bool bIsAbort) +{ + m_pFBO = FBOPtr(); + Canvas::stopPlayback(bIsAbort); + m_bIsRendered = false; +} + +BitmapPtr OffscreenCanvas::screenshot() const +{ + BitmapPtr pBmp = screenshotIgnoreAlpha(); + FilterUnmultiplyAlpha().applyInPlace(pBmp); + return pBmp; +} + +BitmapPtr OffscreenCanvas::screenshotIgnoreAlpha() const +{ + if (!isRunning() || !m_bIsRendered) { + throw(Exception(AVG_ERR_UNSUPPORTED, + "OffscreenCanvas::screenshot(): Canvas has not been rendered. No screenshot available")); + } + BitmapPtr pBmp = m_pFBO->getImage(0); + return pBmp; +} + +bool OffscreenCanvas::getHandleEvents() const +{ + return dynamic_pointer_cast<OffscreenCanvasNode>(getRootNode())->getHandleEvents(); +} + +int OffscreenCanvas::getMultiSampleSamples() const +{ + return dynamic_pointer_cast<OffscreenCanvasNode>( + getRootNode())->getMultiSampleSamples(); +} + +bool OffscreenCanvas::getMipmap() const +{ + return dynamic_pointer_cast<OffscreenCanvasNode>(getRootNode())->getMipmap(); +} + +bool OffscreenCanvas::getAutoRender() const +{ + return dynamic_pointer_cast<OffscreenCanvasNode>(getRootNode())->getAutoRender(); +} + +void OffscreenCanvas::setAutoRender(bool bAutoRender) +{ + dynamic_pointer_cast<OffscreenCanvasNode>(getRootNode())->setAutoRender(bAutoRender); +} + +void OffscreenCanvas::manualRender() +{ + emitPreRenderSignal(); + renderTree(); + emitFrameEndSignal(); +} + +std::string OffscreenCanvas::getID() const +{ + return getRootNode()->getID(); +} + +bool OffscreenCanvas::isRunning() const +{ + return (m_pFBO != FBOPtr()); +} + +GLTexturePtr OffscreenCanvas::getTex() const +{ + AVG_ASSERT(isRunning()); + return m_pFBO->getTex(); +} + +FBOPtr OffscreenCanvas::getFBO() const +{ + AVG_ASSERT(isRunning()); + return m_pFBO; +} + +void OffscreenCanvas::registerCameraNode(CameraNode* pCameraNode) +{ + m_pCameraNodeRef = pCameraNode; + m_pCameraNodeRef->setAutoUpdateCameraImage(false); +} + +void OffscreenCanvas::unregisterCameraNode() +{ + m_pCameraNodeRef->setAutoUpdateCameraImage(true); + m_pCameraNodeRef = NULL; +} + +void OffscreenCanvas::updateCameraImage() +{ + m_pCameraNodeRef->updateCameraImage(); +} + +bool OffscreenCanvas::hasRegisteredCamera() const +{ + return m_pCameraNodeRef != NULL; +} + +bool OffscreenCanvas::isCameraImageAvailable() const +{ + if (!hasRegisteredCamera()) { + return false; + } + return m_pCameraNodeRef->isImageAvailable(); +} + +void OffscreenCanvas::addDependentCanvas(CanvasPtr pCanvas) +{ + m_pDependentCanvases.push_back(pCanvas); + try { + Player::get()->newCanvasDependency(); + } catch (Exception&) { + m_pDependentCanvases.pop_back(); + throw; + } +} + +void OffscreenCanvas::removeDependentCanvas(CanvasPtr pCanvas) +{ + for (unsigned i = 0; i < m_pDependentCanvases.size(); ++i) { + if (pCanvas == m_pDependentCanvases[i]) { + m_pDependentCanvases.erase(m_pDependentCanvases.begin()+i); +// dump(); + return; + } + } + AVG_ASSERT(false); +} + +const vector<CanvasPtr>& OffscreenCanvas::getDependentCanvases() const +{ + return m_pDependentCanvases; +} + +unsigned OffscreenCanvas::getNumDependentCanvases() const +{ + return m_pDependentCanvases.size(); +} + +bool OffscreenCanvas::isSupported() +{ + if (!Player::get()->isPlaying()) { + throw(Exception(AVG_ERR_UNSUPPORTED, + "OffscreenCanvas::isSupported(): Player.play() needs to be called before support can be queried.")); + } + if (GLContext::getMain()->isGLES()) { + return true; + } else { + return FBO::isFBOSupported() && FBO::isPackedDepthStencilSupported(); + } +} + +bool OffscreenCanvas::isMultisampleSupported() +{ + if (!Player::get()->isPlaying()) { + throw(Exception(AVG_ERR_UNSUPPORTED, + "OffscreenCanvas::isMultisampleSupported(): Player.play() needs to be called before multisample support can be queried.")); + } + + return FBO::isMultisampleFBOSupported(); +} + +void OffscreenCanvas::dump() const +{ + cerr << "Canvas: " << getRootNode()->getID() << endl; + for (unsigned i = 0; i < m_pDependentCanvases.size(); ++i) { + cerr << " " << m_pDependentCanvases[i]->getRootNode()->getID() << endl; + } +} + +static ProfilingZoneID OffscreenRenderProfilingZone("Render OffscreenCanvas"); + +void OffscreenCanvas::renderTree() +{ + if (!isRunning()) { + throw(Exception(AVG_ERR_UNSUPPORTED, + "OffscreenCanvas::renderTree(): Player.play() needs to be called before rendering offscreen canvases.")); + } + preRender(); + m_pFBO->activate(); + { + ScopeTimer Timer(OffscreenRenderProfilingZone); + Canvas::render(IntPoint(getRootNode()->getSize()), true); + } + m_pFBO->copyToDestTexture(); + m_bIsRendered = true; +} + +} |