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comparison Framework/Applications/Sdl/SdlBuffering.cpp @ 0:351ab0da0150

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initial commit
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 14 Oct 2016 15:34:11 +0200
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children ff1e935768e7
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-1:000000000000 0:351ab0da0150
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #include "SdlBuffering.h"
34
35 #if ORTHANC_ENABLE_SDL == 1
36
37 #include "../../Orthanc/Core/Logging.h"
38 #include "../../Orthanc/Core/OrthancException.h"
39
40 namespace OrthancStone
41 {
42 SdlBuffering::SdlBuffering() :
43 sdlSurface_(NULL),
44 pendingFrame_(false)
45 {
46 }
47
48
49 SdlBuffering::~SdlBuffering()
50 {
51 if (sdlSurface_)
52 {
53 SDL_FreeSurface(sdlSurface_);
54 }
55 }
56
57
58 void SdlBuffering::SetSize(unsigned int width,
59 unsigned int height,
60 IViewport& viewport)
61 {
62 boost::mutex::scoped_lock lock(mutex_);
63
64 viewport.SetSize(width, height);
65
66 if (offscreenSurface_.get() == NULL ||
67 offscreenSurface_->GetWidth() != width ||
68 offscreenSurface_->GetHeight() != height)
69 {
70 offscreenSurface_.reset(new CairoSurface(width, height));
71 }
72
73 if (onscreenSurface_.get() == NULL ||
74 onscreenSurface_->GetWidth() != width ||
75 onscreenSurface_->GetHeight() != height)
76 {
77 onscreenSurface_.reset(new CairoSurface(width, height));
78
79 // TODO Big endian?
80 static const uint32_t rmask = 0x00ff0000;
81 static const uint32_t gmask = 0x0000ff00;
82 static const uint32_t bmask = 0x000000ff;
83
84 if (sdlSurface_)
85 {
86 SDL_FreeSurface(sdlSurface_);
87 }
88
89 sdlSurface_ = SDL_CreateRGBSurfaceFrom(onscreenSurface_->GetBuffer(), width, height, 32,
90 onscreenSurface_->GetPitch(), rmask, gmask, bmask, 0);
91 if (!sdlSurface_)
92 {
93 LOG(ERROR) << "Cannot create a SDL surface from a Cairo surface";
94 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
95 }
96 }
97
98 pendingFrame_ = false;
99 }
100
101
102 bool SdlBuffering::RenderOffscreen(IViewport& viewport)
103 {
104 boost::mutex::scoped_lock lock(mutex_);
105
106 if (offscreenSurface_.get() == NULL)
107 {
108 return false;
109 }
110
111 Orthanc::ImageAccessor target = offscreenSurface_->GetAccessor();
112
113 if (viewport.Render(target) &&
114 !pendingFrame_)
115 {
116 pendingFrame_ = true;
117 return true;
118 }
119 else
120 {
121 return false;
122 }
123 }
124
125
126 void SdlBuffering::SwapToScreen(SdlWindow& window)
127 {
128 if (!pendingFrame_ ||
129 offscreenSurface_.get() == NULL ||
130 onscreenSurface_.get() == NULL)
131 {
132 return;
133 }
134
135 {
136 boost::mutex::scoped_lock lock(mutex_);
137 onscreenSurface_->Copy(*offscreenSurface_);
138 }
139
140 window.Render(sdlSurface_);
141 pendingFrame_ = false;
142 }
143 }
144
145 #endif