Mercurial > hg > orthanc-stone
diff OrthancStone/Sources/Platforms/WebAssembly/WebGLViewport.cpp @ 1899:917500c46fe0
moved the Platform folder from the Applications folder to the Stone library itself
author | Alain Mazy <am@osimis.io> |
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date | Sat, 29 Jan 2022 12:47:32 +0100 |
parents | |
children | 184b0aeae1af |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OrthancStone/Sources/Platforms/WebAssembly/WebGLViewport.cpp Sat Jan 29 12:47:32 2022 +0100 @@ -0,0 +1,88 @@ +/** + * 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 "../../../OrthancStone/Sources/StoneException.h" +#include "../../../OrthancStone/Sources/Scene2D/OpenGLCompositor.h" +#include "../../../OrthancStone/Sources/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(); + } +}