Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Platforms/WebAssembly/WebGLViewport.cpp @ 1936:224d7763eede
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 06 May 2022 15:30:26 +0200 |
parents | 184b0aeae1af |
children | 07964689cb0b |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2022 Osimis S.A., Belgium * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program 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 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #include "WebGLViewport.h" #include "../../StoneException.h" #include "../../Scene2D/OpenGLCompositor.h" #include "../../Scene2DViewport/ViewportController.h" namespace OrthancStone { void WebGLViewport::Paint(ICompositor& compositor, ViewportController& controller) { try { compositor.Refresh(controller.GetScene()); /** * No need to manually swap the buffer: "Rendered WebGL content * is implicitly presented (displayed to the user) on the canvas * when the event handler that renders with WebGL returns back * to the browser event loop." * https://emscripten.org/docs/api_reference/html5.h.html#webgl-context * * Could call "emscripten_webgl_commit_frame()" if * "explicitSwapControl" option were set to "true". **/ } catch (const StoneException& e) { // Ignore problems about the loss of the WebGL context (edge case) if (e.GetErrorCode() == ErrorCode_WebGLContextLost) { return; } else { throw; } } } WebGLViewport::WebGLViewport(const std::string& canvasId, bool enableEmscriptenMouseEvents) : WebAssemblyViewport(canvasId,enableEmscriptenMouseEvents), context_(GetCanvasCssSelector()) { AcquireCompositor(new OpenGLCompositor(context_)); } boost::shared_ptr<WebGLViewport> WebGLViewport::Create( const std::string& canvasId, bool enableEmscriptenMouseEvents) { boost::shared_ptr<WebGLViewport> that = boost::shared_ptr<WebGLViewport>( new WebGLViewport(canvasId, enableEmscriptenMouseEvents)); that->WebAssemblyViewport::PostConstructor(); return that; } WebGLViewport::~WebGLViewport() { // Make sure to delete the compositor before its parent "context_" gets // deleted ClearCompositor(); } }