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comparison Deprecated/Samples/Sdl/BasicScene.cpp @ 1402:65e1e4b08302

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moved deprecated samples into Deprecated
author Alain Mazy <alain@mazy.be>
date Wed, 29 Apr 2020 20:50:53 +0200
parents Samples/Deprecated/Sdl/BasicScene.cpp@eac254fb6791
children
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1401:f6a2d46d2b76 1402:65e1e4b08302
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 // From Stone
23 #include "../../Framework/Viewport/SdlViewport.h"
24 #include "../../Framework/Scene2D/CairoCompositor.h"
25 #include "../../Framework/Scene2D/ColorTextureSceneLayer.h"
26 #include "../../Framework/Scene2D/OpenGLCompositor.h"
27 #include "../../Framework/Scene2D/PanSceneTracker.h"
28 #include "../../Framework/Scene2D/RotateSceneTracker.h"
29 #include "../../Framework/Scene2D/ZoomSceneTracker.h"
30 #include "../../Framework/Scene2DViewport/ViewportController.h"
31 #include "../../Framework/Scene2DViewport/UndoStack.h"
32
33 #include "../../Framework/StoneInitialization.h"
34 #include "../../Framework/Messages/MessageBroker.h"
35
36 // From Orthanc framework
37 #include <Core/Logging.h>
38 #include <Core/OrthancException.h>
39 #include <Core/Images/Image.h>
40 #include <Core/Images/ImageProcessing.h>
41 #include <Core/Images/PngWriter.h>
42
43 #include <boost/make_shared.hpp>
44
45 #include <SDL.h>
46 #include <stdio.h>
47
48 static const unsigned int FONT_SIZE = 32;
49 static const int LAYER_POSITION = 150;
50
51 #define OPENGL_ENABLED 0
52
53 void PrepareScene(OrthancStone::Scene2D& scene)
54 {
55 using namespace OrthancStone;
56
57 // Texture of 2x2 size
58 {
59 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 2, 2, false);
60
61 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
62 p[0] = 255;
63 p[1] = 0;
64 p[2] = 0;
65
66 p[3] = 0;
67 p[4] = 255;
68 p[5] = 0;
69
70 p = reinterpret_cast<uint8_t*>(i.GetRow(1));
71 p[0] = 0;
72 p[1] = 0;
73 p[2] = 255;
74
75 p[3] = 255;
76 p[4] = 0;
77 p[5] = 0;
78
79 scene.SetLayer(12, new ColorTextureSceneLayer(i));
80
81 std::unique_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
82 l->SetOrigin(-3, 2);
83 l->SetPixelSpacing(1.5, 1);
84 l->SetAngle(20.0 / 180.0 * M_PI);
85 scene.SetLayer(14, l.release());
86 }
87
88 // Texture of 1x1 size
89 {
90 Orthanc::Image i(Orthanc::PixelFormat_RGB24, 1, 1, false);
91
92 uint8_t *p = reinterpret_cast<uint8_t*>(i.GetRow(0));
93 p[0] = 255;
94 p[1] = 0;
95 p[2] = 0;
96
97 std::unique_ptr<ColorTextureSceneLayer> l(new ColorTextureSceneLayer(i));
98 l->SetOrigin(-2, 1);
99 l->SetAngle(20.0 / 180.0 * M_PI);
100 scene.SetLayer(13, l.release());
101 }
102
103 // Some lines
104 {
105 std::unique_ptr<PolylineSceneLayer> layer(new PolylineSceneLayer);
106
107 layer->SetThickness(10);
108
109 PolylineSceneLayer::Chain chain;
110 chain.push_back(ScenePoint2D(0 - 0.5, 0 - 0.5));
111 chain.push_back(ScenePoint2D(0 - 0.5, 2 - 0.5));
112 chain.push_back(ScenePoint2D(2 - 0.5, 2 - 0.5));
113 chain.push_back(ScenePoint2D(2 - 0.5, 0 - 0.5));
114 layer->AddChain(chain, true, 255, 0, 0);
115
116 chain.clear();
117 chain.push_back(ScenePoint2D(-5, -5));
118 chain.push_back(ScenePoint2D(5, -5));
119 chain.push_back(ScenePoint2D(5, 5));
120 chain.push_back(ScenePoint2D(-5, 5));
121 layer->AddChain(chain, true, 0, 255, 0);
122
123 double dy = 1.01;
124 chain.clear();
125 chain.push_back(ScenePoint2D(-4, -4));
126 chain.push_back(ScenePoint2D(4, -4 + dy));
127 chain.push_back(ScenePoint2D(-4, -4 + 2.0 * dy));
128 chain.push_back(ScenePoint2D(4, 2));
129 layer->AddChain(chain, false, 0, 0, 255);
130
131 scene.SetLayer(50, layer.release());
132 }
133
134 // Some text
135 {
136 std::unique_ptr<TextSceneLayer> layer(new TextSceneLayer);
137 layer->SetText("Hello");
138 scene.SetLayer(100, layer.release());
139 }
140 }
141
142
143 void TakeScreenshot(const std::string& target,
144 const OrthancStone::Scene2D& scene,
145 unsigned int canvasWidth,
146 unsigned int canvasHeight)
147 {
148 using namespace OrthancStone;
149 // Take a screenshot, then save it as PNG file
150 CairoCompositor compositor(scene, canvasWidth, canvasHeight);
151 compositor.SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT, FONT_SIZE, Orthanc::Encoding_Latin1);
152 compositor.Refresh();
153
154 Orthanc::ImageAccessor canvas;
155 compositor.GetCanvas().GetReadOnlyAccessor(canvas);
156
157 Orthanc::Image png(Orthanc::PixelFormat_RGB24, canvas.GetWidth(), canvas.GetHeight(), false);
158 Orthanc::ImageProcessing::Convert(png, canvas);
159
160 Orthanc::PngWriter writer;
161 writer.WriteToFile(target, png);
162 }
163
164
165 void HandleApplicationEvent(const SDL_Event& event,
166 boost::shared_ptr<OrthancStone::ViewportController>& controller,
167 boost::shared_ptr<OrthancStone::IFlexiblePointerTracker>& activeTracker)
168 {
169 using namespace OrthancStone;
170
171 Scene2D& scene = controller->GetScene();
172 IViewport& viewport = controller->GetViewport();
173
174 if (event.type == SDL_MOUSEMOTION)
175 {
176 int scancodeCount = 0;
177 const uint8_t* keyboardState = SDL_GetKeyboardState(&scancodeCount);
178
179 if (activeTracker.get() == NULL &&
180 SDL_SCANCODE_LCTRL < scancodeCount &&
181 keyboardState[SDL_SCANCODE_LCTRL])
182 {
183 // The "left-ctrl" key is down, while no tracker is present
184
185 PointerEvent e;
186 e.AddPosition(viewport.GetPixelCenterCoordinates(event.button.x, event.button.y));
187
188 ScenePoint2D p = e.GetMainPosition().Apply(scene.GetCanvasToSceneTransform());
189
190 char buf[64];
191 sprintf(buf, "(%0.02f,%0.02f)", p.GetX(), p.GetY());
192
193 if (scene.HasLayer(LAYER_POSITION))
194 {
195 TextSceneLayer& layer =
196 dynamic_cast<TextSceneLayer&>(scene.GetLayer(LAYER_POSITION));
197 layer.SetText(buf);
198 layer.SetPosition(p.GetX(), p.GetY());
199 }
200 else
201 {
202 std::unique_ptr<TextSceneLayer>
203 layer(new TextSceneLayer);
204 layer->SetColor(0, 255, 0);
205 layer->SetText(buf);
206 layer->SetBorder(20);
207 layer->SetAnchor(BitmapAnchor_BottomCenter);
208 layer->SetPosition(p.GetX(), p.GetY());
209 scene.SetLayer(LAYER_POSITION, layer.release());
210 }
211 }
212 else
213 {
214 scene.DeleteLayer(LAYER_POSITION);
215 }
216 }
217 else if (event.type == SDL_MOUSEBUTTONDOWN)
218 {
219 PointerEvent e;
220 e.AddPosition(viewport.GetPixelCenterCoordinates(event.button.x, event.button.y));
221
222 switch (event.button.button)
223 {
224 case SDL_BUTTON_MIDDLE:
225 activeTracker = boost::make_shared<PanSceneTracker>(controller, e);
226 break;
227
228 case SDL_BUTTON_RIGHT:
229 activeTracker = boost::make_shared<ZoomSceneTracker>
230 (controller, e, viewport.GetCanvasHeight());
231 break;
232
233 case SDL_BUTTON_LEFT:
234 activeTracker = boost::make_shared<RotateSceneTracker>(controller, e);
235 break;
236
237 default:
238 break;
239 }
240 }
241 else if (event.type == SDL_KEYDOWN &&
242 event.key.repeat == 0 /* Ignore key bounce */)
243 {
244 switch (event.key.keysym.sym)
245 {
246 case SDLK_s:
247 controller->FitContent(viewport.GetCanvasWidth(),
248 viewport.GetCanvasHeight());
249 break;
250
251 case SDLK_c:
252 TakeScreenshot("screenshot.png", scene,
253 viewport.GetCanvasWidth(),
254 viewport.GetCanvasHeight());
255 break;
256
257 default:
258 break;
259 }
260 }
261 }
262
263 #if OPENGL_ENABLED==1
264 static void GLAPIENTRY
265 OpenGLMessageCallback(GLenum source,
266 GLenum type,
267 GLuint id,
268 GLenum severity,
269 GLsizei length,
270 const GLchar* message,
271 const void* userParam )
272 {
273 if (severity != GL_DEBUG_SEVERITY_NOTIFICATION)
274 {
275 fprintf(stderr, "GL CALLBACK: %s type = 0x%x, severity = 0x%x, message = %s\n",
276 ( type == GL_DEBUG_TYPE_ERROR ? "** GL ERROR **" : "" ),
277 type, severity, message );
278 }
279 }
280 #endif
281
282 void Run(OrthancStone::MessageBroker& broker,
283 OrthancStone::SdlViewport& viewport)
284 {
285 using namespace OrthancStone;
286
287 boost::shared_ptr<ViewportController> controller(
288 new ViewportController(boost::make_shared<UndoStack>(), broker, viewport));
289
290 #if OPENGL_ENABLED==1
291 glEnable(GL_DEBUG_OUTPUT);
292 glDebugMessageCallback(OpenGLMessageCallback, 0);
293 #endif
294
295 boost::shared_ptr<IFlexiblePointerTracker> tracker;
296
297 bool firstShown = true;
298 bool stop = false;
299 while (!stop)
300 {
301 viewport.Refresh();
302
303 SDL_Event event;
304 while (!stop &&
305 SDL_PollEvent(&event))
306 {
307 if (event.type == SDL_QUIT)
308 {
309 stop = true;
310 break;
311 }
312 else if (event.type == SDL_MOUSEMOTION)
313 {
314 if (tracker)
315 {
316 PointerEvent e;
317 e.AddPosition(viewport.GetPixelCenterCoordinates(
318 event.button.x, event.button.y));
319 tracker->PointerMove(e);
320 }
321 }
322 else if (event.type == SDL_MOUSEBUTTONUP)
323 {
324 if (tracker)
325 {
326 PointerEvent e;
327 e.AddPosition(viewport.GetPixelCenterCoordinates(
328 event.button.x, event.button.y));
329 tracker->PointerUp(e);
330 if(!tracker->IsAlive())
331 tracker.reset();
332 }
333 }
334 else if (event.type == SDL_WINDOWEVENT)
335 {
336 switch (event.window.event)
337 {
338 case SDL_WINDOWEVENT_SIZE_CHANGED:
339 tracker.reset();
340 viewport.UpdateSize(event.window.data1, event.window.data2);
341 break;
342
343 case SDL_WINDOWEVENT_SHOWN:
344 if (firstShown)
345 {
346 // Once the window is first shown, fit the content to its size
347 controller->FitContent(viewport.GetCanvasWidth(), viewport.GetCanvasHeight());
348 firstShown = false;
349 }
350
351 break;
352
353 default:
354 break;
355 }
356 }
357 else if (event.type == SDL_KEYDOWN &&
358 event.key.repeat == 0 /* Ignore key bounce */)
359 {
360 switch (event.key.keysym.sym)
361 {
362 case SDLK_f:
363 viewport.GetWindow().ToggleMaximize();
364 break;
365
366 case SDLK_q:
367 stop = true;
368 break;
369
370 default:
371 break;
372 }
373 }
374
375 HandleApplicationEvent(event, controller, tracker);
376 }
377
378 SDL_Delay(1);
379 }
380 }
381
382
383
384
385 /**
386 * IMPORTANT: The full arguments to "main()" are needed for SDL on
387 * Windows. Otherwise, one gets the linking error "undefined reference
388 * to `SDL_main'". https://wiki.libsdl.org/FAQWindows
389 **/
390 int main(int argc, char* argv[])
391 {
392 OrthancStone::StoneInitialize();
393 Orthanc::Logging::EnableInfoLevel(true);
394
395 try
396 {
397 #if OPENGL_ENABLED==1
398 OrthancStone::SdlOpenGLViewport viewport("Hello", 1024, 768);
399 #else
400 OrthancStone::SdlCairoViewport viewport("Hello", 1024, 768);
401 #endif
402 PrepareScene(viewport.GetScene());
403
404 viewport.GetCompositor().SetFont(0, Orthanc::EmbeddedResources::UBUNTU_FONT,
405 FONT_SIZE, Orthanc::Encoding_Latin1);
406
407 OrthancStone::MessageBroker broker;
408 Run(broker, viewport);
409 }
410 catch (Orthanc::OrthancException& e)
411 {
412 LOG(ERROR) << "EXCEPTION: " << e.What();
413 }
414
415 OrthancStone::StoneFinalize();
416
417 return 0;
418 }