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   int i;
  33   for (i=0; i<2; i++) {
  34     gcvalues.plane_mask= planemasks[i];
  35     // First, the fabric
  36     gcvalues.function= GXclear;
  37     fabric[i]= XCreateGC(display,window,
  38                          GCFunction|GCPlaneMask,
  39                          &gcvalues);
  40     // Then, the mesh
  41     gcvalues.function= GXset;
  42     mesh[i]= XCreateGC(display,window,
  43                        GCFunction|GCPlaneMask,
  44                        &gcvalues);
  45   }
  46   XSelectInput(display,window,0);
  47   XMapWindow(display,window);
  48   XFlush(display);
  49 }
  50
  51 void DualX11Output::startimage() {
  52   XClearWindow(display,window);
  53 }
  54
  55 void DualX11Output::endimage() {
  56   XFlush(display);
  57 }
  58
  59 DualX11Output::~DualX11Output() {
  60   XCloseDisplay(display);
  61 }
  62
  63 void DualX11Output::drawcell(const Point* list, int n) {
  64   static Parameter<double> eyeseparation("eyesep",
  65                                          "Distance from projection eye to origin",
  66                                          0.3, .1, 0., 100.);
  67   for (int i=0; i<2; i++) {
  68     Point::seteyex(eyeseparation*(i-0.5));
  69     XPoint xp[n+1];
  70     for (int j=0; j<n; j++) {
  71       Onscreen here= Onscreen(list[j]);
  72       xp[j].x= (int)((here.x+1.0)*250.0);
  73       xp[j].y= (int)((-here.y+1.0)*250.0);
  74     }
  75     XFillPolygon(display,window,fabric[i],xp,n,Nonconvex,CoordModeOrigin);
  76     xp[n]= xp[0];
  77     XDrawLines(display,window,mesh[i],xp,n+1,CoordModeOrigin);
  78   }
  79   Point::seteyex(0);
  80 }