source: trunk/source/visualization/OpenGL/src/G4OpenGLXViewer.cc @ 948

Last change on this file since 948 was 948, checked in by garnier, 16 years ago

Works for OGLSXm et non vector
  • Property svn:mime-type set to text/cpp
File size: 21.4 KB
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26//
27// $Id: G4OpenGLXViewer.cc,v 1.51 2009/03/05 16:36:13 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  glXMakeCurrent (dpy, fGLXWin, cx);
95  G4OpenGLViewer::SetView (); 
96}
97
98void G4OpenGLXViewer::ShowView () {
99  glXWaitGL (); //Wait for effects of all previous OpenGL commands to
100                //be propagated before progressing.
101  glFlush ();
102
103  if (fVP.IsPicking()) {
104    G4cout <<
105      "Window activated for picking (left-mouse), exit (middle-mouse)."
106           << G4endl;
107    while (true) {
108      if (XPending(dpy)) {
109        XNextEvent(dpy, &event);
110        if (event.type == ButtonPress && event.xbutton.button == 1) {
111          Pick(event.xbutton.x, event.xbutton.y);
112        }
113        else if (event.type == ButtonPress && event.xbutton.button == 2) break;
114      }
115    }
116  }
117}
118
119void G4OpenGLXViewer::GetXConnection () {
120// get a connection.
121  dpy = XOpenDisplay (0);
122  if (!dpy) {
123    fViewId = -1;  // This flags an error.
124    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't open display." << G4endl;
125    return;
126  }
127
128// make sure OpenGL is supported and installed properly.
129  if (!glXQueryExtension (dpy, &errorBase, &eventBase)) {
130    fViewId = -1;  // This flags an error.
131    G4cerr << "G4OpenGLViewer::G4OpenGLViewer X Server has no GLX extension."
132         << G4endl;
133    return;
134  }
135
136}
137
138void G4OpenGLXViewer::CreateGLXContext (XVisualInfo* v) {
139
140  vi = v;
141// get window's attributes
142  if (!XGetWindowAttributes(dpy, XRootWindow (dpy, vi -> screen), &xwa)) {
143    fViewId = -1;  // This flags an error.
144    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't return window attributes"
145         << G4endl;
146    return;
147  }
148 
149// create a GLX context
150  cx = glXCreateContext (dpy, vi, 0, true);
151  if (!cx) {
152    fViewId = -1;  // This flags an error.
153    G4cerr << "G4OpenGLViewer::G4OpenGLViewer couldn't create context."
154         << G4endl;
155    return;
156  }
157
158// New stab at getting a colormap
159
160  Status status;
161  XStandardColormap *standardCmaps = XAllocStandardColormap ();
162  int i, numCmaps;
163
164  status = XmuLookupStandardColormap (dpy,
165                                      vi -> screen,
166                                      vi -> visualid,
167                                      vi -> depth,
168                                      XA_RGB_DEFAULT_MAP,
169                                      False,
170                                      True);
171 
172  if (status == 1) {
173    cmap = 0;
174    status = XGetRGBColormaps (dpy,
175                               XRootWindow (dpy, vi -> screen),
176                               &standardCmaps,
177                               &numCmaps,
178                               XA_RGB_DEFAULT_MAP);
179    if (status == 1)
180      for (i = 0; i < numCmaps; i++) {
181        if (standardCmaps[i].visualid == vi -> visualid) {
182          cmap = standardCmaps[i].colormap;
183          XFree (standardCmaps);
184          break;
185        }
186      }
187    if (!cmap) {
188      fViewId = -1;  // This flags an error.
189      G4cerr <<
190   "G4OpenGLViewer::G4OpenGLViewer failed to allocate a standard colormap."
191             << G4endl;
192      return;
193    }
194    G4cout << "Got standard cmap" << G4endl;
195  } else {
196    cmap = XCreateColormap (dpy,
197                            XRootWindow(dpy, vi -> screen),
198                            vi -> visual,
199                            AllocNone);
200    G4cout << "Created own cmap" << G4endl;
201  }
202
203  if (!cmap) {
204    fViewId = -1;  // This flags an error.
205    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to allocate a Colormap."
206         << G4endl;
207    return;
208  }
209
210}
211 
212void G4OpenGLXViewer::CreateMainWindow () {
213 
214// create a window
215  swa.colormap = cmap;
216  swa.border_pixel = 0;
217  swa.event_mask = ExposureMask | ButtonPressMask | StructureNotifyMask;
218  swa.backing_store = WhenMapped;
219
220  // Window size and position...
221  size_hints = XAllocSizeHints();
222   
223  fWinSize_x = fVP.GetWindowSizeHintX();
224  fWinSize_y = fVP.GetWindowSizeHintY();
225  G4int x_origin = fVP.GetWindowAbsoluteLocationHintX(DisplayWidth(dpy, vi -> screen));
226
227  // FIXME,  screen size != window size on MAC, but I don't know have to get the menuBar
228  // size on MAC. L.Garnier 01/2009
229  G4int y_origin = fVP.GetWindowAbsoluteLocationHintY(DisplayHeight(dpy, vi -> screen));
230
231  size_hints->base_width = fWinSize_x;
232  size_hints->base_height = fWinSize_y;
233  size_hints->x = x_origin;
234  size_hints->y = y_origin;
235  if (fVP.IsWindowSizeHintX () && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
236    size_hints->flags |= PSize | PPosition;
237  } else if (fVP.IsWindowSizeHintX () && !(fVP.IsWindowLocationHintX () || fVP.IsWindowLocationHintY ())) {
238    size_hints->flags |= PSize;
239  } else if ((!fVP.IsWindowSizeHintX ()) && fVP.IsWindowLocationHintX () && fVP.IsWindowLocationHintY ()) {
240    size_hints->flags |= PPosition;
241  }
242  G4cout << "Window name: " << fName << G4endl;
243  strncpy (charViewName, fName, 100);
244  char *window_name = charViewName;
245  char *icon_name = charViewName;
246  //char tmpatom[] = "XA_WM_NORMAL_HINTS";
247  wm_hints = XAllocWMHints();
248  class_hints = XAllocClassHint();
249
250  XStringListToTextProperty (&window_name, 1, &windowName);
251  XStringListToTextProperty (&icon_name, 1, &iconName);
252
253  wm_hints -> initial_state = NormalState;
254  wm_hints -> input = True;
255  wm_hints -> icon_pixmap = icon_pixmap;
256  wm_hints -> flags = StateHint | IconPixmapHint | InputHint;
257
258  class_hints -> res_name  = NewString("G4OpenGL");
259  class_hints -> res_class = NewString("G4OpenGL");
260
261   fGLXWin = XCreateWindow (dpy, XRootWindow (dpy, vi -> screen), x_origin,
262                        y_origin, fWinSize_x, fWinSize_y, 0, vi -> depth,
263                        InputOutput, vi -> visual, 
264                        CWBorderPixel | CWColormap |
265                        CWEventMask | CWBackingStore,
266                        &swa);
267 
268   XSetWMProperties (dpy, fGLXWin, &windowName, &iconName, 0, 0,
269                     size_hints, wm_hints, class_hints);
270 
271// request X to Draw window on screen.
272  XMapWindow (dpy, fGLXWin);
273
274// Wait for window to appear (wait for an "expose" event).
275  XIfEvent (dpy, &event, G4OpenGLXViewerWaitForNotify, (char*) fGLXWin);
276
277// connect the context to a window
278  Bool success = glXMakeCurrent (dpy, fGLXWin, cx);
279  if (!success) {
280    fViewId = -1;  // This flags an error.
281    G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to attach a GLX context."
282         << G4endl;
283    GLint error = GL_NO_ERROR;
284    while ((error = glGetError()) != GL_NO_ERROR) {
285      G4cout << "GL Error: " << gluErrorString(error) << G4endl;
286    }
287    return;
288  }
289
290}
291
292void G4OpenGLXViewer::CreateFontLists () {
293
294  std::map<G4double,G4String> fonts;  // G4VMarker screen size and font name.
295  fonts[10.] = "-adobe-courier-bold-r-normal--10-100-75-75-m-60-iso8859-1";
296  fonts[11.] = "-adobe-courier-bold-r-normal--11-80-100-100-m-60-iso8859-1";
297  fonts[12.] = "-adobe-courier-bold-r-normal--12-120-75-75-m-70-iso8859-1";
298  fonts[13.] = "fixed";
299  fonts[14.] = "-adobe-courier-bold-r-normal--14-100-100-100-m-90-iso8859-1";
300  fonts[17.] = "-adobe-courier-bold-r-normal--17-120-100-100-m-100-iso8859-1";
301  fonts[18.] = "-adobe-courier-bold-r-normal--18-180-75-75-m-110-iso8859-1";
302  fonts[20.] = "-adobe-courier-bold-r-normal--20-140-100-100-m-110-iso8859-1";
303  fonts[24.] = "-adobe-courier-bold-r-normal--24-240-75-75-m-150-iso8859-1";
304  fonts[25.] = "-adobe-courier-bold-r-normal--25-180-100-100-m-150-iso8859-1";
305  fonts[34.] = "-adobe-courier-bold-r-normal--34-240-100-100-m-200-iso8859-1";
306  std::map<G4double,G4String>::const_iterator i;
307  for (i = fonts.begin(); i != fonts.end(); ++i) {
308    XFontStruct* font_info = XLoadQueryFont(dpy, i->second);
309    if (!font_info) {
310      G4cerr <<
311        "G4OpenGLXViewer: XLoadQueryFont failed for font\n  "
312             << i->second
313             << G4endl;
314      continue;
315    }
316    G4int font_base = glGenLists(256);
317    if (!font_base) {
318      G4cerr << "G4OpenGLXViewer: out of display lists for fonts."
319             << G4endl;
320      continue;
321    }
322    G4int first = font_info->min_char_or_byte2;
323    G4int last  = font_info->max_char_or_byte2;
324    glXUseXFont(font_info->fid, first, last-first+1,font_base+first);
325    G4OpenGLFontBaseStore::AddFontBase(this,font_base,i->first,i->second);
326  }
327}
328
329G4OpenGLXViewer::G4OpenGLXViewer (G4OpenGLSceneHandler& scene):
330G4VViewer (scene, -1),
331G4OpenGLViewer (scene),
332vi_immediate (0),
333vi_stored (0),
334vi (0),
335cmap (0)
336{
337  GetXConnection ();
338  if (fViewId < 0) return;
339 
340  // Try for a visual suitable for OpenGLImmediate..
341  // first try for a single buffered RGB window
342  if (!vi_single_buffer) {
343    vi_single_buffer =
344      glXChooseVisual (dpy, XDefaultScreen (dpy), snglBuf_RGBA);
345  }
346  if (!vi_double_buffer) {
347    vi_double_buffer =
348      glXChooseVisual (dpy, XDefaultScreen (dpy), dblBuf_RGBA);
349  }
350
351  if (vi_single_buffer || vi_double_buffer) {
352    if (!vi_double_buffer) {
353      G4cout <<
354        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
355        "\n  Working with a single buffer."
356             << G4endl;
357    }
358  } else {
359    if (!vi_single_buffer) {
360      G4cout <<
361        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a single buffer visual."
362             << G4endl;
363    }
364    if (!vi_double_buffer) {
365      G4cout <<
366        "G4OpenGLXViewer::G4OpenGLXViewer: unable to get a double buffer visual."
367             << G4endl;
368    }
369  }
370
371  if (vi_single_buffer) {
372    vi_immediate = vi_single_buffer;
373    attributeList = snglBuf_RGBA;
374  }
375 
376  if (!vi_immediate){
377    // next try for a double buffered RGB, but Draw to top buffer
378    if (vi_double_buffer) {
379      vi_immediate = vi_double_buffer;
380      attributeList = dblBuf_RGBA;
381    }
382  }
383
384  // Now try for a visual suitable for OpenGLStored...
385  // Try for a double buffered RGB window
386  if (vi_double_buffer) {
387    vi_stored = vi_double_buffer;
388    attributeList = dblBuf_RGBA;
389  }
390
391  if (!vi_immediate || !vi_stored) {
392    G4cout <<
393    "G4OpenGLXViewer::G4OpenGLXViewer: unable to get required visuals."
394           << G4endl;
395    fViewId = -1;  // This flags an error.
396  }
397
398  //  glClearColor (0., 0., 0., 0.);
399  //  glClearDepth (1.);
400}
401
402G4OpenGLXViewer::~G4OpenGLXViewer () {
403  if (fViewId >= 0) {
404    //Close a window from here
405    glXMakeCurrent (dpy, None, NULL);
406    glXDestroyContext (dpy, cx);
407    if (fGLXWin) XDestroyWindow (dpy, fGLXWin); // ...if already deleted in
408    // sub-class G4OpenGLXmViewer.
409    XFlush (dpy);
410  }
411}
412
413void G4OpenGLXViewer::printEPS() {
414 
415    printf("G4OpenGLXViewer::print \n");
416
417  //using namespace std;
418  //cout << "print_col_callback requested with file name: " << fPrintFilename << G4endl;
419 
420  if (fVectoredPs) {
421#ifdef G4DEBUG_VIS_OGL
422    printf("G4OpenGLXViewer::print Vectored\n");
423#endif
424    G4OpenGLViewer::printEPS();   
425  } else {
426#ifdef G4DEBUG_VIS_OGL
427    printf("G4OpenGLXViewer::print non Vectored\n");
428#endif
429//     G4StateManager* stateManager = G4StateManager::GetStateManager();
430//     G4ApplicationState oldState = stateManager->GetCurrentState();
431//     stateManager->SetNewState(G4State_Idle); 
432
433//     printEPS ();
434
435//     stateManager->SetNewState(oldState); 
436   
437//     //    fPrintFilename =   fPrintFilename+"-Gl2ps.ps";
438//     return;
439
440// save context before
441    tmp_cx = cx;
442    XVisualInfo* pvi;
443    GLXContext pcx = create_GL_print_context(pvi);
444//     cmap = XCreateColormap (dpy,
445//                          XRootWindow(dpy, pvi -> screen),
446//                          pvi -> visual,
447//                          AllocNone);
448//     if (!cmap) {
449//       fViewId = -1;  // This flags an error.
450//       G4cerr << "G4OpenGLViewer::G4OpenGLViewer failed to allocate a Colormap."
451//              << G4endl;
452//       return;
453//     }
454//     swa.colormap = cmap;
455    if (!pcx) {
456      G4cout << "Unable to create print context." << G4endl;
457      return;
458    }
459
460#ifdef G4DEBUG_VIS_OGL
461    printf("G4OpenGLXViewer::print Create pixmap old context:%d new context %d old winGL:%d \n",cx,pcx,fGLXWin);
462#endif
463    cx=pcx;
464   
465    Pixmap pmap = XCreatePixmap (dpy,
466                                 XRootWindow (dpy, pvi->screen),
467                                 fWinSize_x, fWinSize_y,
468                                 pvi->depth);
469   
470
471    if (!pmap) {
472      G4cout << "Unable to create pixmap." << G4endl;
473      return;
474    }
475    GLXPixmap glxpmap = glXCreateGLXPixmap (dpy,
476                                            pvi,
477                                            pmap);
478   
479    if (!glxpmap) {
480      G4cout << "Unable to create glx pixmap." << G4endl;
481      return;
482    }
483    GLXDrawable tmp_win;
484    tmp_win=fGLXWin;
485    fGLXWin=glxpmap;
486   
487    //
488    bool er1 = glXMakeCurrent (dpy,
489                               fGLXWin,  // pixmap win Id
490                               cx); // pixmap context Id
491       
492    glViewport (0, 0, fWinSize_x, fWinSize_y);
493   
494    //    InitializeGLView ();
495   
496    // clear the buffers and window.
497    ClearView ();
498    SetView();
499    //    FinishView ();
500
501#ifdef G4DEBUG_VIS_OGL
502    printf("G4OpenGLXViewer::print Call DrawView context:%d old winGL:%d \n",cx,fGLXWin);
503#endif
504
505
506
507    // Need to force redraw for SXm mode
508    NeedKernelVisit ();
509
510    // Need to change state to IDLE
511    G4StateManager* stateManager = G4StateManager::GetStateManager();
512    G4ApplicationState oldState = stateManager->GetCurrentState();
513    stateManager->SetNewState(G4State_Idle); 
514
515   
516
517    DrawView (); // Will make current glX
518
519    // Restore state
520     stateManager->SetNewState(oldState); 
521
522
523
524   
525    std::string file = "G4OpenGL_XPixmap.eps";
526    generateEPSX (file.c_str(),
527                 fPrintColour,
528                 fWinSize_x, fWinSize_y);
529   
530    fGLXWin=tmp_win;
531    cx=tmp_cx;
532   
533    bool er2 = glXMakeCurrent (dpy,
534                    fGLXWin,
535                    cx);
536    printf("G4OpenGLXViewer::print Restored context:%d old winGL:%d \n",cx,fGLXWin);
537    printf("Error 1:%d 2:%d\n",er1,er2);
538   
539    //    glXDestroyContext(pcx);
540    //    glXDestroyGLXPixmap(glpixmap)
541  }
542
543}
544
545
546GLXContext G4OpenGLXViewer::create_GL_print_context(XVisualInfo*& pvi) {
547 
548  pvi = glXChooseVisual (dpy,
549                         XDefaultScreen (dpy),
550                         snglBuf_RGBA);
551
552  if (!pvi) {
553    pvi = glXChooseVisual (dpy,
554                           XDefaultScreen (dpy),
555                           dblBuf_RGBA);
556  }
557
558//    GLXFBConfig *fbc;
559//    XVisualInfo *vi;
560//    Colormap cmap;
561//    XSetWindowAttributes swa;
562//    Window win;
563//    GLXContext cx;
564//    GLXWindow gwin;
565//    XEvent event;
566//    int nelements;
567 
568//    /* Find a FBConfig that uses RGBA.  Note that no attribute list is */
569//    /* needed since GLX_RGBA_BIT is a default attribute.               */
570//    fbc = glXChooseFBConfig(dpy,XRootWindow (dpy, pvi->screen), 0, &nelements);
571//    vi = glXGetVisualFromFBConfig(dpy, fbc[0]);
572 
573//    /* Create a GLX context using the first FBConfig in the list. */
574//    return  glXCreateNewContext(dpy, fbc[0], GLX_RGBA_TYPE, 0, GL_FALSE);
575 
576
577 
578  printf("------%d------\n",tmp_cx);
579  return glXCreateContext (dpy,
580                           pvi,
581                           0,
582                           False);
583}
584
585
586GLubyte* G4OpenGLXViewer::grabPixelsX (int inColor, unsigned int width, unsigned int height) {
587#ifdef G4DEBUG_VIS_OGL
588  printf("G4OpenGLXViewer::grabPixelsX\n");
589#endif
590         
591  GLubyte* buffer;
592  GLint swapbytes, lsbfirst, rowlength;
593  GLint skiprows, skippixels, alignment;
594  GLenum format;
595  int size;
596       
597  if (inColor) {
598    format = GL_RGB;
599    size = width*height*3;
600  } else {
601    format = GL_LUMINANCE;
602    size = width*height*1;
603  }
604       
605  buffer = new GLubyte[size];
606  if (buffer == NULL)
607    return NULL;
608       
609  glGetIntegerv (GL_UNPACK_SWAP_BYTES, &swapbytes);
610  glGetIntegerv (GL_UNPACK_LSB_FIRST, &lsbfirst);
611  glGetIntegerv (GL_UNPACK_ROW_LENGTH, &rowlength);
612       
613  glGetIntegerv (GL_UNPACK_SKIP_ROWS, &skiprows);
614  glGetIntegerv (GL_UNPACK_SKIP_PIXELS, &skippixels);
615  glGetIntegerv (GL_UNPACK_ALIGNMENT, &alignment);
616       
617  glPixelStorei (GL_UNPACK_SWAP_BYTES, GL_FALSE);
618  glPixelStorei (GL_UNPACK_LSB_FIRST, GL_FALSE);
619  glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
620       
621  glPixelStorei (GL_UNPACK_SKIP_ROWS, 0);
622  glPixelStorei (GL_UNPACK_SKIP_PIXELS, 0);
623  glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
624       
625  glReadPixels (0, 0, (GLsizei)width, (GLsizei)height, format, GL_UNSIGNED_BYTE, (GLvoid*) buffer);
626       
627  glXWaitGL (); //Wait for effects of all previous OpenGL commands to
628  //                 //be propagated before progressing.
629  glFlush ();
630
631//   printf("-----------\n-----------\n-----------\n-----------\n-----------\n%d %d %d\n",width, height,size);
632//   char * pixels = new char [3 * width * height];
633//   glReadPixels (0, 0, (GLsizei)width, (GLsizei)height, GL_DEPTH_COMPONENT, GL_FLOAT, pixels);
634 
635//   for (int i = 0; i<size; i++) {
636//     if (pixels[i] != 0)
637//       printf("%d ",pixels[i]);
638//     else
639//       printf(" ");
640//   }
641
642//   printf("-----------\n-----------\n-----------\n-----------\n-----------\n");
643
644  glPixelStorei (GL_UNPACK_SWAP_BYTES, swapbytes);
645  glPixelStorei (GL_UNPACK_LSB_FIRST, lsbfirst);
646  glPixelStorei (GL_UNPACK_ROW_LENGTH, rowlength);
647         
648  glPixelStorei (GL_UNPACK_SKIP_ROWS, skiprows);
649  glPixelStorei (GL_UNPACK_SKIP_PIXELS, skippixels);
650  glPixelStorei (GL_UNPACK_ALIGNMENT, alignment);
651         
652 
653  return buffer;
654}
655       
656int G4OpenGLXViewer::generateEPSX (const char* filnam,
657                                  int inColour,
658                                  unsigned int width,
659                                  unsigned int height) {
660       
661  FILE* fp;
662  GLubyte* pixels;
663  GLubyte* curpix;
664  int components, pos, i;
665       
666#ifdef G4DEBUG_VIS_OGL
667    printf("G4OpenGLXViewer::generateEPSX\n");
668#endif
669
670  pixels = grabPixelsX (inColour, width, height);
671#ifdef G4DEBUG_VIS_OGL
672    printf("--\n--\n--\n");
673#endif
674       
675  if (pixels == NULL)
676    return 1;
677  if (inColour) {
678    components = 3;
679  } else {
680    components = 1;
681  }
682         
683  fp = fopen (filnam, "w");
684  if (fp == NULL) {
685    return 2;
686  }
687         
688  fprintf (fp, "%%!PS-Adobe-2.0 EPSF-1.2\n");
689  fprintf (fp, "%%%%Title: %s\n", filnam);
690  fprintf (fp, "%%%%Creator: OpenGL pixmap render output\n");
691  fprintf (fp, "%%%%BoundingBox: 0 0 %d %d\n", width, height);
692  fprintf (fp, "%%%%EndComments\n");
693  fprintf (fp, "gsave\n");
694  fprintf (fp, "/bwproc {\n");
695  fprintf (fp, "    rgbproc\n");
696  fprintf (fp, "    dup length 3 idiv string 0 3 0 \n");
697  fprintf (fp, "    5 -1 roll {\n");
698  fprintf (fp, "    add 2 1 roll 1 sub dup 0 eq\n");
699  fprintf (fp, "    { pop 3 idiv 3 -1 roll dup 4 -1 roll dup\n");
700  fprintf (fp, "       3 1 roll 5 -1 roll } put 1 add 3 0 \n");
701  fprintf (fp, "    { 2 1 roll } ifelse\n");
702  fprintf (fp, "    }forall\n");
703  fprintf (fp, "    pop pop pop\n");
704  fprintf (fp, "} def\n");
705  fprintf (fp, "systemdict /colorimage known not {\n");
706  fprintf (fp, "   /colorimage {\n");
707  fprintf (fp, "       pop\n");
708  fprintf (fp, "       pop\n");
709  fprintf (fp, "       /rgbproc exch def\n");
710  fprintf (fp, "       { bwproc } image\n");
711  fprintf (fp, "   }  def\n");
712  fprintf (fp, "} if\n");
713  fprintf (fp, "/picstr %d string def\n", width * components);
714  fprintf (fp, "%d %d scale\n", width, height);
715  fprintf (fp, "%d %d %d\n", width, height, 8);
716  fprintf (fp, "[%d 0 0 %d 0 0]\n", width, height);
717  fprintf (fp, "{currentfile picstr readhexstring pop}\n");
718  fprintf (fp, "false %d\n", components);
719  fprintf (fp, "colorimage\n");
720         
721  curpix = (GLubyte*) pixels;
722  pos = 0;
723  for (i = width*height*components; i>0; i--) {
724    fprintf (fp, "%02hx ", *(curpix++));
725    if (++pos >= 32) {
726      fprintf (fp, "\n");
727      pos = 0;
728    }
729  }
730  if (pos)
731    fprintf (fp, "\n");
732       
733  fprintf (fp, "grestore\n");
734  fprintf (fp, "showpage\n");
735  delete pixels;
736  fclose (fp);
737  return 0;
738}
739       
740
741#endif
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