Mercurial > hg > orthanc-stone
view Applications/Resources/Graveyard/Threading/SdlBuffering.cpp @ 1676:5e76d5e8167a
limit the amount of frames to be prefetched
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Mon, 23 Nov 2020 18:49:42 +0100 |
parents | 4fb8fdf03314 |
children | 9ac2a65d4172 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2020 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program 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 * Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "SdlBuffering.h" #if ORTHANC_ENABLE_SDL == 1 #include "../../Resources/Orthanc/Core/Logging.h" #include "../../Resources/Orthanc/Core/OrthancException.h" namespace OrthancStone { SdlBuffering::SdlBuffering() : sdlSurface_(NULL), pendingFrame_(false) { } SdlBuffering::~SdlBuffering() { if (sdlSurface_) { SDL_FreeSurface(sdlSurface_); } } void SdlBuffering::SetSize(unsigned int width, unsigned int height, IViewport& viewport) { boost::mutex::scoped_lock lock(mutex_); viewport.SetSize(width, height); if (offscreenSurface_.get() == NULL || offscreenSurface_->GetWidth() != width || offscreenSurface_->GetHeight() != height) { offscreenSurface_.reset(new CairoSurface(width, height)); } if (onscreenSurface_.get() == NULL || onscreenSurface_->GetWidth() != width || onscreenSurface_->GetHeight() != height) { onscreenSurface_.reset(new CairoSurface(width, height)); // TODO Big endian? static const uint32_t rmask = 0x00ff0000; static const uint32_t gmask = 0x0000ff00; static const uint32_t bmask = 0x000000ff; if (sdlSurface_) { SDL_FreeSurface(sdlSurface_); } sdlSurface_ = SDL_CreateRGBSurfaceFrom(onscreenSurface_->GetBuffer(), width, height, 32, onscreenSurface_->GetPitch(), rmask, gmask, bmask, 0); if (!sdlSurface_) { LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface"; throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); } } pendingFrame_ = false; } bool SdlBuffering::RenderOffscreen(IViewport& viewport) { boost::mutex::scoped_lock lock(mutex_); if (offscreenSurface_.get() == NULL) { return false; } Orthanc::ImageAccessor target = offscreenSurface_->GetAccessor(); if (viewport.Render(target) && !pendingFrame_) { pendingFrame_ = true; return true; } else { return false; } } void SdlBuffering::SwapToScreen(SdlWindow& window) { if (!pendingFrame_ || offscreenSurface_.get() == NULL || onscreenSurface_.get() == NULL) { return; } { boost::mutex::scoped_lock lock(mutex_); onscreenSurface_->Copy(*offscreenSurface_); } window.Render(sdlSurface_); pendingFrame_ = false; } } #endif