source: trunk/source/visualization/OpenGL/src/G4OpenGLXViewer.cc @ 1346

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26//
27// $Id: G4OpenGLXViewer.cc,v 1.56 2010/11/10 17:57:16 allison 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
41#include "G4OpenGLFontBaseStore.hh"
42
43#include <sstream>
44
45#include "G4VisExtent.hh"
46#include "G4LogicalVolume.hh"
47#include "G4VSolid.hh"
48#include "G4Point3D.hh"
49#include "G4Normal3D.hh"
50#include "G4StateManager.hh"
51#include "G4VisManager.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  Bool success = glXMakeCurrent (dpy, win, cx);
95  if (!success) {
96    fViewId = -1;  // This flags an error.
97    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to attach a GLX context."
98           << G4endl;
99    GLint error = GL_NO_ERROR;
100    while ((error = glGetError()) != GL_NO_ERROR) {
101      G4cout << "GL Error: " << gluErrorString(error) << G4endl;
102    }
103    return;
104  }
105  G4OpenGLViewer::SetView (); 
106}
107
108void G4OpenGLXViewer::ShowView () {
109  glXWaitGL (); //Wait for effects of all previous OpenGL commands to
110                //be propagated before progressing.
111  glFlush ();
112
113  if (fVP.IsPicking()) {
114    G4cout <<
115      "Window activated for picking (left-mouse), exit (middle-mouse)."
116           << G4endl;
117    while (true) {
118      if (XPending(dpy)) {
119        XNextEvent(dpy, &event);
120        if (event.type == ButtonPress && event.xbutton.button == 1) {
121          Pick(event.xbutton.x, event.xbutton.y);
122        }
123        else if (event.type == ButtonPress && event.xbutton.button == 2) break;
124      }
125    }
126  }
127}
128
129void G4OpenGLXViewer::GetXConnection () {
130// get a connection.
131  dpy = XOpenDisplay (0);
132  if (!dpy) {
133    fViewId = -1;  // This flags an error.
134    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't open display." << G4endl;
135    return;
136  }
137
138// make sure OpenGL is supported and installed properly.
139  if (!glXQueryExtension (dpy, &errorBase, &eventBase)) {
140    fViewId = -1;  // This flags an error.
141    G4cerr << "G4OpenGLViewer::G4OpenGLViewer X Server has no GLX extension."
142         << G4endl;
143    return;
144  }
145
146}
147
148void G4OpenGLXViewer::CreateGLXContext (XVisualInfo* v) {
149
150  vi = v;
151// get window's attributes
152  if (!XGetWindowAttributes(dpy, XRootWindow (dpy, vi -> screen), &xwa)) {
153    fViewId = -1;  // This flags an error.
154    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't return window attributes"
155         << G4endl;
156    return;
157  }
158 
159// create a GLX context
160  cx = glXCreateContext (dpy, vi, 0, true);
161  if (!cx) {
162    fViewId = -1;  // This flags an error.
163    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't create context."
164         << G4endl;
165    return;
166  }
167
168// New stab at getting a colormap
169
170  Status status;
171  XStandardColormap *standardCmaps = XAllocStandardColormap ();
172  int i, numCmaps;
173
174  status = XmuLookupStandardColormap (dpy,
175                                      vi -> screen,
176                                      vi -> visualid,
177                                      vi -> depth,
178                                      XA_RGB_DEFAULT_MAP,
179                                      False,
180                                      True);
181 
182  if (status == 1) {
183    cmap = 0;
184    status = XGetRGBColormaps (dpy,
185                               XRootWindow (dpy, vi -> screen),
186                               &standardCmaps,
187                               &numCmaps,
188                               XA_RGB_DEFAULT_MAP);
189    if (status == 1)
190      for (i = 0; i < numCmaps; i++) {
191        if (standardCmaps[i].visualid == vi -> visualid) {
192          cmap = standardCmaps[i].colormap;
193          XFree (standardCmaps);
194          break;
195        }
196      }
197    if (!cmap) {
198      fViewId = -1;  // This flags an error.
199      if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
200        G4cerr <<
201  "G4OpenGLViewer::G4OpenGLViewer failed to allocate a standard colormap."
202               << G4endl;
203      return;
204    }
205    if (G4VisManager::GetVerbosity() >= G4VisManager::confirmations)
206      G4cout << "Got standard cmap" << G4endl;
207  } else {
208    cmap = XCreateColormap (dpy,
209                            XRootWindow(dpy, vi -> screen),
210                            vi -> visual,
211                            AllocNone);
212    if (G4VisManager::GetVerbosity() >= G4VisManager::confirmations)
213      G4cout << "Created own cmap" << G4endl;
214  }
215
216  if (!cmap) {
217    fViewId = -1;  // This flags an error.
218    if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
219      G4cout << "G4OpenGLViewer::G4OpenGLViewer failed to allocate a Colormap."
220             << G4endl;
221    return;
222  }
223
224}
225 
226void G4OpenGLXViewer::CreateMainWindow () {
227 
228// create a window
229  swa.colormap = cmap;
230  swa.border_pixel = 0;
231  swa.event_mask = ExposureMask | ButtonPressMask | StructureNotifyMask;
232  swa.backing_store = WhenMapped;
233
234  // Window size and position...
235  size_hints = XAllocSizeHints();
236   
237  ResizeWindow(fVP.GetWindowSizeHintX(),fVP.GetWindowSizeHintY());
238
239  G4int x_origin = fVP.GetWindowAbsoluteLocationHintX(DisplayWidth(dpy, vi -> screen));
240
241  // FIXME,  screen size != window size on MAC, but I don't know have to get the menuBar
242  // size on MAC. L.Garnier 01/2009
243  G4int y_origin = fVP.GetWindowAbsoluteLocationHintY(DisplayHeight(dpy, vi -> screen));
244
245  size_hints->base_width = getWinWidth();
246  size_hints->base_height = getWinHeight();
247  size_hints->x = x_origin;
248  size_hints->y = y_origin;
249  if (fVP.IsWindowSizeHintX () && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
250    size_hints->flags |= PSize | PPosition;
251  } else if (fVP.IsWindowSizeHintX () && !(fVP.IsWindowLocationHintX () || fVP.IsWindowLocationHintY ())) {
252    size_hints->flags |= PSize;
253  } else if ((!fVP.IsWindowSizeHintX ()) && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
254    size_hints->flags |= PPosition;
255  }
256  if (G4VisManager::GetVerbosity() >= G4VisManager::confirmations)
257    G4cout << "Window name: " << fName << G4endl;
258  strncpy (charViewName, fName, 100);
259  char *window_name = charViewName;
260  char *icon_name = charViewName;
261  //char tmpatom[] = "XA_WM_NORMAL_HINTS";
262  wm_hints = XAllocWMHints();
263  class_hints = XAllocClassHint();
264
265  XStringListToTextProperty (&window_name, 1, &windowName);
266  XStringListToTextProperty (&icon_name, 1, &iconName);
267
268  wm_hints -> initial_state = NormalState;
269  wm_hints -> input = True;
270  wm_hints -> icon_pixmap = icon_pixmap;
271  wm_hints -> flags = StateHint | IconPixmapHint | InputHint;
272
273  class_hints -> res_name  = NewString("G4OpenGL");
274  class_hints -> res_class = NewString("G4OpenGL");
275
276   win = XCreateWindow (dpy, XRootWindow (dpy, vi -> screen), x_origin,
277                        y_origin, getWinWidth(), getWinHeight(), 0, vi -> depth,
278                        InputOutput, vi -> visual, 
279                        CWBorderPixel | CWColormap |
280                        CWEventMask | CWBackingStore,
281                        &swa);
282 
283   XSetWMProperties (dpy, win, &windowName, &iconName, 0, 0,
284                     size_hints, wm_hints, class_hints);
285 
286// request X to Draw window on screen.
287  XMapWindow (dpy, win);
288
289// Wait for window to appear (wait for an "expose" event).
290  XIfEvent (dpy, &event, G4OpenGLXViewerWaitForNotify, (char*) win);
291
292// connect the context to a window
293  Bool success = glXMakeCurrent (dpy, win, cx);
294  if (!success) {
295    fViewId = -1;  // This flags an error.
296    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to attach a GLX context."
297         << G4endl;
298    GLint error = GL_NO_ERROR;
299    while ((error = glGetError()) != GL_NO_ERROR) {
300      G4cout << "GL Error: " << gluErrorString(error) << G4endl;
301    }
302    return;
303  }
304
305}
306
307void G4OpenGLXViewer::CreateFontLists () {
308
309  std::map<G4double,G4String> fonts;  // G4VMarker screen size and font name.
310  fonts[10.] = "-adobe-courier-bold-r-normal--10-100-75-75-m-60-iso8859-1";
311  fonts[11.] = "-adobe-courier-bold-r-normal--11-80-100-100-m-60-iso8859-1";
312  fonts[12.] = "-adobe-courier-bold-r-normal--12-120-75-75-m-70-iso8859-1";
313  fonts[13.] = "fixed";
314  fonts[14.] = "-adobe-courier-bold-r-normal--14-100-100-100-m-90-iso8859-1";
315  fonts[17.] = "-adobe-courier-bold-r-normal--17-120-100-100-m-100-iso8859-1";
316  fonts[18.] = "-adobe-courier-bold-r-normal--18-180-75-75-m-110-iso8859-1";
317  fonts[20.] = "-adobe-courier-bold-r-normal--20-140-100-100-m-110-iso8859-1";
318  fonts[24.] = "-adobe-courier-bold-r-normal--24-240-75-75-m-150-iso8859-1";
319  fonts[25.] = "-adobe-courier-bold-r-normal--25-180-100-100-m-150-iso8859-1";
320  fonts[34.] = "-adobe-courier-bold-r-normal--34-240-100-100-m-200-iso8859-1";
321  std::map<G4double,G4String>::const_iterator i;
322  for (i = fonts.begin(); i != fonts.end(); ++i) {
323    XFontStruct* font_info = XLoadQueryFont(dpy, i->second);
324    if (!font_info) {
325      G4cerr <<
326        "G4OpenGLXViewer: XLoadQueryFont failed for font\n  "
327             << i->second
328             << G4endl;
329      continue;
330    }
331    G4int font_base = glGenLists(256);
332    if (!font_base) {
333      G4cerr << "G4OpenGLXViewer: out of display lists for fonts."
334             << G4endl;
335      continue;
336    }
337    G4int first = font_info->min_char_or_byte2;
338    G4int last  = font_info->max_char_or_byte2;
339    glXUseXFont(font_info->fid, first, last-first+1,font_base+first);
340    G4OpenGLFontBaseStore::AddFontBase(this,font_base,i->first,i->second);
341  }
342}
343
344void G4OpenGLXViewer::drawText(const char * textString,int x,int y,int z, int size){
345 
346  CreateFontLists ();
347  // gl2ps or GL window ?
348  if (! drawGl2psText(textString,size)) {
349
350    G4int font_base = G4OpenGLFontBaseStore::GetFontBase(this,size);
351    if (font_base < 0) {
352      static G4int callCount = 0;
353      ++callCount;
354      if (callCount <= 10 || callCount%100 == 0) {
355        G4cout <<
356          "G4OpenGLSceneHandler::AddPrimitive (const G4Text&) call count "
357               << callCount <<
358          "\n  No fonts available."
359          "\n  Called with text \""
360               << textString
361               << "\"\n  at "
362               << "x:"<< x
363               << "y:"<< y
364               << "z:"<< z
365               << ", size " << size
366          //               << ", offsets " << text.GetXOffset () << ", " << text.GetYOffset ()
367               << G4endl;
368      }
369      return;
370    }
371    // No action on offset or layout at present.
372    glPushAttrib(GL_LIST_BIT);
373    glListBase(font_base);
374    glCallLists(strlen(textString), GL_UNSIGNED_BYTE, (GLubyte *)textString);
375    glPopAttrib();
376  }
377}
378
379
380G4OpenGLXViewer::G4OpenGLXViewer (G4OpenGLSceneHandler& scene):
381G4VViewer (scene, -1),
382G4OpenGLViewer (scene),
383vi_immediate (0),
384vi_stored (0),
385vi (0),
386cmap (0)
387{
388  GetXConnection ();
389  if (fViewId < 0) return;
390 
391  // Try for a visual suitable for OpenGLImmediate..
392  // first try for a single buffered RGB window
393  if (!vi_single_buffer) {
394    vi_single_buffer =
395      glXChooseVisual (dpy, XDefaultScreen (dpy), snglBuf_RGBA);
396  }
397  if (!vi_double_buffer) {
398    vi_double_buffer =
399      glXChooseVisual (dpy, XDefaultScreen (dpy), dblBuf_RGBA);
400  }
401
402  if (vi_single_buffer || vi_double_buffer) {
403    if (!vi_double_buffer) {
404      G4cout <<
405        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
406        "\n  Working with a single buffer."
407             << G4endl;
408    }
409  } else {
410    if (!vi_single_buffer) {
411      G4cout <<
412        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a single buffer visual."
413             << G4endl;
414    }
415    if (!vi_double_buffer) {
416      G4cout <<
417        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
418             << G4endl;
419    }
420  }
421
422  if (vi_single_buffer) {
423    vi_immediate = vi_single_buffer;
424    attributeList = snglBuf_RGBA;
425  }
426 
427  if (!vi_immediate){
428    // next try for a double buffered RGB, but Draw to top buffer
429    if (vi_double_buffer) {
430      vi_immediate = vi_double_buffer;
431      attributeList = dblBuf_RGBA;
432    }
433  }
434
435  // Now try for a visual suitable for OpenGLStored...
436  // Try for a double buffered RGB window
437  if (vi_double_buffer) {
438    vi_stored = vi_double_buffer;
439    attributeList = dblBuf_RGBA;
440  }
441
442  if (!vi_immediate || !vi_stored) {
443    G4cout <<
444    "G4OpenGLXViewer::G4OpenGLXViewer: unable to get required visuals."
445           << G4endl;
446    fViewId = -1;  // This flags an error.
447  }
448
449  //  glClearColor (0., 0., 0., 0.);
450  //  glClearDepth (1.);
451}
452
453G4OpenGLXViewer::~G4OpenGLXViewer () {
454  if (fViewId >= 0) {
455    //Close a window from here
456    glXMakeCurrent (dpy, None, NULL);
457    glXDestroyContext (dpy, cx);
458    if (win) XDestroyWindow (dpy, win); // ...if already deleted in
459    // sub-class G4OpenGLXmViewer.
460    XFlush (dpy);
461  }
462}
463       
464
465#endif
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