source: trunk/source/visualization/OpenGL/src/G4OpenGLXViewer.cc @ 1010

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27// $Id: G4OpenGLXViewer.cc,v 1.52 2009/04/08 16:55:44 lgarnier Exp $
28// GEANT4 tag $Name:  $
29//
30//
31// Andrew Walkden  7th February 1997
32// G4OpenGLXViewer : Class to provide XWindows specific
33//                 functionality for OpenGL in GEANT4
34
35#ifdef G4VIS_BUILD_OPENGLX_DRIVER
36
37#include "G4OpenGLXViewer.hh"
38#include "G4VViewer.hh"
39#include "G4OpenGLSceneHandler.hh"
40#include <GL/glu.h>
41
42#include "G4OpenGLFontBaseStore.hh"
43
44#include <sstream>
45
46#include "G4VisExtent.hh"
47#include "G4LogicalVolume.hh"
48#include "G4VSolid.hh"
49#include "G4Point3D.hh"
50#include "G4Normal3D.hh"
51#include "G4StateManager.hh"
52
53#include <X11/Xatom.h>
54#include <X11/Xutil.h>
55#include <X11/Xmu/StdCmap.h>
56
57#include <assert.h>
58
59int G4OpenGLXViewer::snglBuf_RGBA[12] =
60{ GLX_RGBA,
61  GLX_RED_SIZE, 1,
62  GLX_GREEN_SIZE, 1,
63  GLX_BLUE_SIZE, 1,
64  GLX_DEPTH_SIZE, 1,
65  GLX_STENCIL_SIZE, 1,
66  None };
67
68int G4OpenGLXViewer::dblBuf_RGBA[13] =
69{ GLX_RGBA,
70  GLX_RED_SIZE, 1,
71  GLX_GREEN_SIZE, 1,
72  GLX_BLUE_SIZE, 1,
73  GLX_DOUBLEBUFFER,
74  GLX_DEPTH_SIZE, 1,
75  GLX_STENCIL_SIZE, 1,
76  None };
77
78#define NewString(str) \
79 ((str) != NULL ? (strcpy((char*)malloc((unsigned)strlen(str) + 1), str)) : (char*)NULL)
80
81#define USE_DEFAULT_COLORMAP 1
82#define USE_STANDARD_COLORMAP 0
83
84XVisualInfo*  G4OpenGLXViewer::vi_single_buffer = 0;
85XVisualInfo*  G4OpenGLXViewer::vi_double_buffer = 0;
86
87extern "C" {
88  static Bool G4OpenGLXViewerWaitForNotify (Display*, XEvent* e, char* arg) {
89    return (e->type == MapNotify) && (e->xmap.window == (Window) arg);
90  }
91}
92
93void G4OpenGLXViewer::SetView () {
94#ifdef G4DEBUG_VIS_OGL
95    printf("G4OpenGLXViewer::SetView \n");
96#endif
97  Bool success = glXMakeCurrent (dpy, win, cx);
98  if (!success) {
99    fViewId = -1;  // This flags an error.
100    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to attach a GLX context."
101           << G4endl;
102    GLint error = GL_NO_ERROR;
103    while ((error = glGetError()) != GL_NO_ERROR) {
104      G4cout << "GL Error: " << gluErrorString(error) << G4endl;
105    }
106    return;
107  }
108  G4OpenGLViewer::SetView (); 
109}
110
111void G4OpenGLXViewer::ShowView () {
112  glXWaitGL (); //Wait for effects of all previous OpenGL commands to
113                //be propagated before progressing.
114  glFlush ();
115
116  if (fVP.IsPicking()) {
117    G4cout <<
118      "Window activated for picking (left-mouse), exit (middle-mouse)."
119           << G4endl;
120    while (true) {
121      if (XPending(dpy)) {
122        XNextEvent(dpy, &event);
123        if (event.type == ButtonPress && event.xbutton.button == 1) {
124          Pick(event.xbutton.x, event.xbutton.y);
125        }
126        else if (event.type == ButtonPress && event.xbutton.button == 2) break;
127      }
128    }
129  }
130}
131
132void G4OpenGLXViewer::GetXConnection () {
133// get a connection.
134  dpy = XOpenDisplay (0);
135  if (!dpy) {
136    fViewId = -1;  // This flags an error.
137    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't open display." << G4endl;
138    return;
139  }
140
141// make sure OpenGL is supported and installed properly.
142  if (!glXQueryExtension (dpy, &errorBase, &eventBase)) {
143    fViewId = -1;  // This flags an error.
144    G4cerr << "G4OpenGLViewer::G4OpenGLViewer X Server has no GLX extension."
145         << G4endl;
146    return;
147  }
148
149}
150
151void G4OpenGLXViewer::CreateGLXContext (XVisualInfo* v) {
152
153  vi = v;
154// get window's attributes
155  if (!XGetWindowAttributes(dpy, XRootWindow (dpy, vi -> screen), &xwa)) {
156    fViewId = -1;  // This flags an error.
157    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't return window attributes"
158         << G4endl;
159    return;
160  }
161 
162// create a GLX context
163  cx = glXCreateContext (dpy, vi, 0, true);
164  if (!cx) {
165    fViewId = -1;  // This flags an error.
166    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't create context."
167         << G4endl;
168    return;
169  }
170
171// New stab at getting a colormap
172
173  Status status;
174  XStandardColormap *standardCmaps = XAllocStandardColormap ();
175  int i, numCmaps;
176
177  status = XmuLookupStandardColormap (dpy,
178                                      vi -> screen,
179                                      vi -> visualid,
180                                      vi -> depth,
181                                      XA_RGB_DEFAULT_MAP,
182                                      False,
183                                      True);
184 
185  if (status == 1) {
186    cmap = 0;
187    status = XGetRGBColormaps (dpy,
188                               XRootWindow (dpy, vi -> screen),
189                               &standardCmaps,
190                               &numCmaps,
191                               XA_RGB_DEFAULT_MAP);
192    if (status == 1)
193      for (i = 0; i < numCmaps; i++) {
194        if (standardCmaps[i].visualid == vi -> visualid) {
195          cmap = standardCmaps[i].colormap;
196          XFree (standardCmaps);
197          break;
198        }
199      }
200    if (!cmap) {
201      fViewId = -1;  // This flags an error.
202      G4cerr <<
203   "G4OpenGLViewer::G4OpenGLViewer failed to allocate a standard colormap."
204             << G4endl;
205      return;
206    }
207    G4cout << "Got standard cmap" << G4endl;
208  } else {
209    cmap = XCreateColormap (dpy,
210                            XRootWindow(dpy, vi -> screen),
211                            vi -> visual,
212                            AllocNone);
213    G4cout << "Created own cmap" << G4endl;
214  }
215
216  if (!cmap) {
217    fViewId = -1;  // This flags an error.
218    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to allocate a Colormap."
219         << G4endl;
220    return;
221  }
222
223}
224 
225void G4OpenGLXViewer::CreateMainWindow () {
226 
227// create a window
228  swa.colormap = cmap;
229  swa.border_pixel = 0;
230  swa.event_mask = ExposureMask | ButtonPressMask | StructureNotifyMask;
231  swa.backing_store = WhenMapped;
232
233  // Window size and position...
234  size_hints = XAllocSizeHints();
235   
236  fWinSize_x = fVP.GetWindowSizeHintX();
237  fWinSize_y = fVP.GetWindowSizeHintY();
238  G4int x_origin = fVP.GetWindowAbsoluteLocationHintX(DisplayWidth(dpy, vi -> screen));
239
240  // FIXME,  screen size != window size on MAC, but I don't know have to get the menuBar
241  // size on MAC. L.Garnier 01/2009
242  G4int y_origin = fVP.GetWindowAbsoluteLocationHintY(DisplayHeight(dpy, vi -> screen));
243
244  size_hints->base_width = fWinSize_x;
245  size_hints->base_height = fWinSize_y;
246  size_hints->x = x_origin;
247  size_hints->y = y_origin;
248  if (fVP.IsWindowSizeHintX () && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
249    size_hints->flags |= PSize | PPosition;
250  } else if (fVP.IsWindowSizeHintX () && !(fVP.IsWindowLocationHintX () || fVP.IsWindowLocationHintY ())) {
251    size_hints->flags |= PSize;
252  } else if ((!fVP.IsWindowSizeHintX ()) && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
253    size_hints->flags |= PPosition;
254  }
255  G4cout << "Window name: " << fName << G4endl;
256  strncpy (charViewName, fName, 100);
257  char *window_name = charViewName;
258  char *icon_name = charViewName;
259  //char tmpatom[] = "XA_WM_NORMAL_HINTS";
260  wm_hints = XAllocWMHints();
261  class_hints = XAllocClassHint();
262
263  XStringListToTextProperty (&window_name, 1, &windowName);
264  XStringListToTextProperty (&icon_name, 1, &iconName);
265
266  wm_hints -> initial_state = NormalState;
267  wm_hints -> input = True;
268  wm_hints -> icon_pixmap = icon_pixmap;
269  wm_hints -> flags = StateHint | IconPixmapHint | InputHint;
270
271  class_hints -> res_name  = NewString("G4OpenGL");
272  class_hints -> res_class = NewString("G4OpenGL");
273
274   win = XCreateWindow (dpy, XRootWindow (dpy, vi -> screen), x_origin,
275                        y_origin, fWinSize_x, fWinSize_y, 0, vi -> depth,
276                        InputOutput, vi -> visual, 
277                        CWBorderPixel | CWColormap |
278                        CWEventMask | CWBackingStore,
279                        &swa);
280 
281   XSetWMProperties (dpy, win, &windowName, &iconName, 0, 0,
282                     size_hints, wm_hints, class_hints);
283 
284// request X to Draw window on screen.
285  XMapWindow (dpy, win);
286
287// Wait for window to appear (wait for an "expose" event).
288  XIfEvent (dpy, &event, G4OpenGLXViewerWaitForNotify, (char*) win);
289
290// connect the context to a window
291  Bool success = glXMakeCurrent (dpy, win, cx);
292  if (!success) {
293    fViewId = -1;  // This flags an error.
294    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to attach a GLX context."
295         << G4endl;
296    GLint error = GL_NO_ERROR;
297    while ((error = glGetError()) != GL_NO_ERROR) {
298      G4cout << "GL Error: " << gluErrorString(error) << G4endl;
299    }
300    return;
301  }
302
303}
304
305void G4OpenGLXViewer::CreateFontLists () {
306
307  std::map<G4double,G4String> fonts;  // G4VMarker screen size and font name.
308  fonts[10.] = "-adobe-courier-bold-r-normal--10-100-75-75-m-60-iso8859-1";
309  fonts[11.] = "-adobe-courier-bold-r-normal--11-80-100-100-m-60-iso8859-1";
310  fonts[12.] = "-adobe-courier-bold-r-normal--12-120-75-75-m-70-iso8859-1";
311  fonts[13.] = "fixed";
312  fonts[14.] = "-adobe-courier-bold-r-normal--14-100-100-100-m-90-iso8859-1";
313  fonts[17.] = "-adobe-courier-bold-r-normal--17-120-100-100-m-100-iso8859-1";
314  fonts[18.] = "-adobe-courier-bold-r-normal--18-180-75-75-m-110-iso8859-1";
315  fonts[20.] = "-adobe-courier-bold-r-normal--20-140-100-100-m-110-iso8859-1";
316  fonts[24.] = "-adobe-courier-bold-r-normal--24-240-75-75-m-150-iso8859-1";
317  fonts[25.] = "-adobe-courier-bold-r-normal--25-180-100-100-m-150-iso8859-1";
318  fonts[34.] = "-adobe-courier-bold-r-normal--34-240-100-100-m-200-iso8859-1";
319  std::map<G4double,G4String>::const_iterator i;
320  for (i = fonts.begin(); i != fonts.end(); ++i) {
321    XFontStruct* font_info = XLoadQueryFont(dpy, i->second);
322    if (!font_info) {
323      G4cerr <<
324        "G4OpenGLXViewer: XLoadQueryFont failed for font\n  "
325             << i->second
326             << G4endl;
327      continue;
328    }
329    G4int font_base = glGenLists(256);
330    if (!font_base) {
331      G4cerr << "G4OpenGLXViewer: out of display lists for fonts."
332             << G4endl;
333      continue;
334    }
335    G4int first = font_info->min_char_or_byte2;
336    G4int last  = font_info->max_char_or_byte2;
337    glXUseXFont(font_info->fid, first, last-first+1,font_base+first);
338    G4OpenGLFontBaseStore::AddFontBase(this,font_base,i->first,i->second);
339  }
340}
341
342G4OpenGLXViewer::G4OpenGLXViewer (G4OpenGLSceneHandler& scene):
343G4VViewer (scene, -1),
344G4OpenGLViewer (scene),
345vi_immediate (0),
346vi_stored (0),
347vi (0),
348cmap (0)
349{
350  GetXConnection ();
351  if (fViewId < 0) return;
352 
353  // Try for a visual suitable for OpenGLImmediate..
354  // first try for a single buffered RGB window
355  if (!vi_single_buffer) {
356    vi_single_buffer =
357      glXChooseVisual (dpy, XDefaultScreen (dpy), snglBuf_RGBA);
358  }
359  if (!vi_double_buffer) {
360    vi_double_buffer =
361      glXChooseVisual (dpy, XDefaultScreen (dpy), dblBuf_RGBA);
362  }
363
364  if (vi_single_buffer || vi_double_buffer) {
365    if (!vi_double_buffer) {
366      G4cout <<
367        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
368        "\n  Working with a single buffer."
369             << G4endl;
370    }
371  } else {
372    if (!vi_single_buffer) {
373      G4cout <<
374        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a single buffer visual."
375             << G4endl;
376    }
377    if (!vi_double_buffer) {
378      G4cout <<
379        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
380             << G4endl;
381    }
382  }
383
384  if (vi_single_buffer) {
385    vi_immediate = vi_single_buffer;
386    attributeList = snglBuf_RGBA;
387  }
388 
389  if (!vi_immediate){
390    // next try for a double buffered RGB, but Draw to top buffer
391    if (vi_double_buffer) {
392      vi_immediate = vi_double_buffer;
393      attributeList = dblBuf_RGBA;
394    }
395  }
396
397  // Now try for a visual suitable for OpenGLStored...
398  // Try for a double buffered RGB window
399  if (vi_double_buffer) {
400    vi_stored = vi_double_buffer;
401    attributeList = dblBuf_RGBA;
402  }
403
404  if (!vi_immediate || !vi_stored) {
405    G4cout <<
406    "G4OpenGLXViewer::G4OpenGLXViewer: unable to get required visuals."
407           << G4endl;
408    fViewId = -1;  // This flags an error.
409  }
410
411  //  glClearColor (0., 0., 0., 0.);
412  //  glClearDepth (1.);
413}
414
415G4OpenGLXViewer::~G4OpenGLXViewer () {
416  if (fViewId >= 0) {
417    //Close a window from here
418    glXMakeCurrent (dpy, None, NULL);
419    glXDestroyContext (dpy, cx);
420    if (win) XDestroyWindow (dpy, win); // ...if already deleted in
421    // sub-class G4OpenGLXmViewer.
422    XFlush (dpy);
423  }
424}
425       
426
427#endif
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