Mercurial > hg > orthanc-stone

comparison Applications/Platforms/WebAssembly/WebGLViewport.cpp @ 1591:5887a4f8594b

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moving platform-specific files out of the "OrthancStone" folder
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 23 Oct 2020 13:15:03 +0200
parents OrthancStone/Sources/Viewport/WebGLViewport.cpp@314b6dc507d9
children 9ac2a65d4172
comparison
equal deleted inserted replaced
1590:7b963bccafef 1591:5887a4f8594b
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "WebGLViewport.h"
23
24 #include "../../../OrthancStone/Sources/StoneException.h"
25 #include "../../../OrthancStone/Sources/Scene2D/OpenGLCompositor.h"
26 #include "../../../OrthancStone/Sources/Scene2DViewport/ViewportController.h"
27
28 namespace OrthancStone
29 {
30 void WebGLViewport::Paint(ICompositor& compositor,
31 ViewportController& controller)
32 {
33 try
34 {
35 compositor.Refresh(controller.GetScene());
36
37 /**
38 * No need to manually swap the buffer: "Rendered WebGL content
39 * is implicitly presented (displayed to the user) on the canvas
40 * when the event handler that renders with WebGL returns back
41 * to the browser event loop."
42 * https://emscripten.org/docs/api_reference/html5.h.html#webgl-context
43 *
44 * Could call "emscripten_webgl_commit_frame()" if
45 * "explicitSwapControl" option were set to "true".
46 **/
47 }
48 catch (const StoneException& e)
49 {
50 // Ignore problems about the loss of the WebGL context (edge case)
51 if (e.GetErrorCode() == ErrorCode_WebGLContextLost)
52 {
53 return;
54 }
55 else
56 {
57 throw;
58 }
59 }
60 }
61
62
63 WebGLViewport::WebGLViewport(const std::string& canvasId, bool enableEmscriptenMouseEvents) :
64 WebAssemblyViewport(canvasId,enableEmscriptenMouseEvents),
65 context_(GetCanvasCssSelector())
66 {
67 AcquireCompositor(new OpenGLCompositor(context_));
68 }
69
70 boost::shared_ptr<WebGLViewport> WebGLViewport::Create(
71 const std::string& canvasId, bool enableEmscriptenMouseEvents)
72 {
73 boost::shared_ptr<WebGLViewport> that = boost::shared_ptr<WebGLViewport>(
74 new WebGLViewport(canvasId, enableEmscriptenMouseEvents));
75
76 that->WebAssemblyViewport::PostConstructor();
77 return that;
78 }
79
80 WebGLViewport::~WebGLViewport()
81 {
82 // Make sure to delete the compositor before its parent "context_" gets
83 // deleted
84 ClearCompositor();
85 }
86 }