dualx11.cc~

   1 /*
   2  * X11 functions
   3  */
   4
   5 #include "dualx11.hh"
   6 #include "parameter.hh"
   7
   8 DualX11Output::DualX11Output() {
   9   display= XOpenDisplay(0);
  10   Colormap cmap= DefaultColormap(display,DefaultScreen(display));
  11
  12   XAllocColorCells(display,cmap,
  13                    False, // contig
  14                    planemasks,
  15                    2, // nplanes
  16                    &pixelbase,
  17                    1); // ncolors
  18   XColor colours[4], *cp= colours;
  19   for (int i=0; i<2; i++)
  20     for (int j=0; j<2; j++, cp++) {
  21       cp->pixel= pixelbase + (i? planemasks[0] :0) + (j? planemasks[1] :0);
  22       cp->red= i?65535:0;  cp->green= j?/*65535*/32000:0;  cp->blue= 0;
  23       cp->flags= DoRed|DoGreen|DoBlue;
  24     }
  25   XStoreColors(display,cmap,colours,4);
  26
  27   window= XCreateSimpleWindow(display,
  28                               DefaultRootWindow(display),
  29                               0,0, 500,500, 0,0, pixelbase);
  30
  31   XGCValues gcvalues;
  32   for (i=0; i<2; i++) {
  33     gcvalues.plane_mask= planemasks[i];
  34     // First, the fabric
  35     gcvalues.function= GXclear;
  36     fabric[i]= XCreateGC(display,window,
  37                          GCFunction|GCPlaneMask,
  38                          &gcvalues);
  39     // Then, the mesh
  40     gcvalues.function= GXset;
  41     mesh[i]= XCreateGC(display,window,
  42                        GCFunction|GCPlaneMask,
  43                        &gcvalues);
  44   }
  45   XSelectInput(display,window,0);
  46   XMapWindow(display,window);
  47   XFlush(display);
  48 }
  49
  50 void DualX11Output::startimage() {
  51   XClearWindow(display,window);
  52 }
  53
  54 void DualX11Output::endimage() {
  55   XFlush(display);
  56 }
  57
  58 DualX11Output::~DualX11Output() {
  59   XCloseDisplay(display);
  60 }
  61
  62 void DualX11Output::drawcell(const Point* list, int n) {
  63   static Parameter<double> eyeseparation("eyesep",
  64                                          "Distance from projection eye to origin",
  65                                          0.3, .1, 0., 100.);
  66   for (int i=0; i<2; i++) {
  67     Point::seteyex(eyeseparation*(i-0.5));
  68     XPoint xp[n+1];
  69     for (int j=0; j<n; j++) {
  70       Onscreen here= Onscreen(list[j]);
  71       xp[j].x= (int)((here.x+1.0)*250.0);
  72       xp[j].y= (int)((-here.y+1.0)*250.0);
  73     }
  74     XFillPolygon(display,window,fabric[i],xp,n,Nonconvex,CoordModeOrigin);
  75     xp[n]= xp[0];
  76     XDrawLines(display,window,mesh[i],xp,n+1,CoordModeOrigin);
  77   }
  78   Point::seteyex(0);
  79 }