Mercurial > hg > orthanc-stone
comparison Applications/Platforms/Sdl/SdlOpenGLContext.cpp @ 1591:5887a4f8594b
moving platform-specific files out of the "OrthancStone" folder
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 23 Oct 2020 13:15:03 +0200 |
parents | OrthancStone/Sources/OpenGL/SdlOpenGLContext.cpp@244ad1e4e76a |
children | 4fb8fdf03314 |
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1590:7b963bccafef | 1591:5887a4f8594b |
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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 "SdlOpenGLContext.h" | |
23 #include "../../../OrthancStone/Sources/StoneException.h" | |
24 | |
25 #if ORTHANC_ENABLE_SDL == 1 | |
26 | |
27 #if !defined(ORTHANC_ENABLE_GLEW) | |
28 # error Macro ORTHANC_ENABLE_GLEW must be defined | |
29 #endif | |
30 | |
31 #if ORTHANC_ENABLE_GLEW == 1 | |
32 # include <GL/glew.h> | |
33 #endif | |
34 | |
35 #include <OrthancException.h> | |
36 | |
37 namespace OrthancStone | |
38 { | |
39 SdlOpenGLContext::SdlOpenGLContext(const char* title, | |
40 unsigned int width, | |
41 unsigned int height, | |
42 bool allowDpiScaling) | |
43 : window_(title, width, height, true /* enable OpenGL */, allowDpiScaling) | |
44 , context_(NULL) | |
45 { | |
46 context_ = SDL_GL_CreateContext(window_.GetObject()); | |
47 | |
48 if (context_ == NULL) | |
49 { | |
50 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, | |
51 "Cannot initialize OpenGL"); | |
52 } | |
53 | |
54 #if ORTHANC_ENABLE_GLEW == 1 | |
55 // The initialization function of glew (i.e. "glewInit()") can | |
56 // only be called once an OpenGL is setup. | |
57 // https://stackoverflow.com/a/45033669/881731 | |
58 { | |
59 static boost::mutex mutex_; | |
60 static bool isGlewInitialized_ = false; | |
61 | |
62 boost::mutex::scoped_lock lock(mutex_); | |
63 | |
64 if (!isGlewInitialized_) | |
65 { | |
66 LOG(INFO) << "Initializing glew"; | |
67 | |
68 GLenum err = glewInit(); | |
69 if (GLEW_OK != err) | |
70 { | |
71 LOG(ERROR) << glewGetErrorString(err); | |
72 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, | |
73 "Cannot initialize glew"); | |
74 } | |
75 | |
76 isGlewInitialized_ = true; | |
77 } | |
78 } | |
79 #endif | |
80 } | |
81 | |
82 | |
83 SdlOpenGLContext::~SdlOpenGLContext() | |
84 { | |
85 SDL_GL_DeleteContext(context_); | |
86 } | |
87 | |
88 void SdlOpenGLContext::MakeCurrent() | |
89 { | |
90 if (SDL_GL_MakeCurrent(window_.GetObject(), context_) != 0) | |
91 { | |
92 const char* errText = SDL_GetError(); | |
93 std::stringstream ss; | |
94 ss << "Cannot set current OpenGL context. SDL error text: " << errText; | |
95 std::string errStr = ss.str(); | |
96 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, errStr.c_str()); | |
97 } | |
98 | |
99 // This makes our buffer swap synchronized with the monitor's vertical refresh | |
100 SDL_GL_SetSwapInterval(1); | |
101 } | |
102 | |
103 | |
104 void SdlOpenGLContext::SwapBuffer() | |
105 { | |
106 // Swap our buffer to display the current contents of buffer on screen | |
107 SDL_GL_SwapWindow(window_.GetObject()); | |
108 } | |
109 | |
110 | |
111 unsigned int SdlOpenGLContext::GetCanvasWidth() const | |
112 { | |
113 int w = 0; | |
114 SDL_GL_GetDrawableSize(window_.GetObject(), &w, NULL); | |
115 return static_cast<unsigned int>(w); | |
116 } | |
117 | |
118 | |
119 unsigned int SdlOpenGLContext::GetCanvasHeight() const | |
120 { | |
121 int h = 0; | |
122 SDL_GL_GetDrawableSize(window_.GetObject(), NULL, &h); | |
123 return static_cast<unsigned int>(h); | |
124 } | |
125 } | |
126 | |
127 #endif |