search for: gecreatedevdesc

According to the "R Internals" document, for a custom device, I should create a pDevDesc structure that gets passed to GECreateDevDesc. ..elided... pDevDesc dev; /* Allocate and initialize the device driver data */ if (!(dev = (pDevDesc) calloc(1, sizeof(DevDesc)))) return 0; /* or error() */ /* set up device driver or free ?dev? and error() */ gdd = GEcreateDevDesc(dev); GEaddDevice2(gdd, "dev_name"); ...elided... whi...

...bgcolor, canvascolor, sfonts, res, > xpos, ypos, title, useCairo, antialias, family)) { > free(dev); > errorcall(call, _("unable to start device %s"), devname); > } > dd = GEcreateDevDesc(dev); > GEaddDevice2(dd, devname); > > i.e., we start the device driver, and if it fails, we throw away the "dev" structure and call it a day. If it succeeds, we proceed to create a device descriptor structure and add it to the list of open devices. > > This appr...

...>------------>> >..... >Gah. I've been too tired today. Why did that take me so long? > >The culprit seems to be > >R_ProcessEvents((void*) NULL) > >in newX11DeviceDriver > >This gets called *before* this stuff at the end of Rf_addX11Device > > dd = GEcreateDevDesc(dev); > addDevice((DevDesc*) dd); > initDisplayList((DevDesc*) dd); > >and it is that "dd" that gets called by Rf_playDisplayList. Removing >the offending line stops the segfaulting, seemingly with no ill >effects. > >I'm not really sure what the use of that li...

...r, canvascolor, sfonts, res, >>> xpos, ypos, title, useCairo, antialias, family)) { >>> free(dev); >>> errorcall(call, _("unable to start device %s"), devname); >>> } >>> dd = GEcreateDevDesc(dev); >>> GEaddDevice2(dd, devname); >>> i.e., we start the device driver, and if it fails, we throw away the "dev" structure and call it a day. If it succeeds, we proceed to create a device descriptor structure and add it to the list of open devices. >>&gt...

...mma, colormodel, maxcubesize, bgcolor, canvascolor, sfonts, res, xpos, ypos, title, useCairo, antialias, family)) { free(dev); errorcall(call, _("unable to start device %s"), devname); } dd = GEcreateDevDesc(dev); GEaddDevice2(dd, devname); i.e., we start the device driver, and if it fails, we throw away the "dev" structure and call it a day. If it succeeds, we proceed to create a device descriptor structure and add it to the list of open devices. This approach means that X11DeviceD...

...bgcolor, canvascolor, sfonts, res, >> xpos, ypos, title, useCairo, antialias, family)) { >> free(dev); >> errorcall(call, _("unable to start device %s"), devname); >> } >> dd = GEcreateDevDesc(dev); >> GEaddDevice2(dd, devname); >> i.e., we start the device driver, and if it fails, we throw away the "dev" structure and call it a day. If it succeeds, we proceed to create a device descriptor structure and add it to the list of open devices. >> This appro...

I don't recall exactly what I did 18 years ago eiher and I likely don't have the time to dig into the archives and reconstruct. I can imagine that the issue had to do with the protocol around creating and mapping windows. Presumably the segfault comes from looking for events on a window that hasn't been created yet, or has already been destroyed, leading to a NULL reference somewhere.

.... Part of thread "X11 still segfaults". ------------>> ..... Gah. I've been too tired today. Why did that take me so long? The culprit seems to be R_ProcessEvents((void*) NULL) in newX11DeviceDriver This gets called *before* this stuff at the end of Rf_addX11Device dd = GEcreateDevDesc(dev); addDevice((DevDesc*) dd); initDisplayList((DevDesc*) dd); and it is that "dd" that gets called by Rf_playDisplayList. Removing the offending line stops the segfaulting, seemingly with no ill effects. I'm not really sure what the use of that line ever was; it might be necess...

...lloc(1, sizeof(NewDevDesc)))) return R_NilValue; dev->displayList = R_NilValue; if (!nullDeviceDriver(dev)) { free(dev); error("unable to start NULL device"); } gsetVar(install(".Device"), mkString("NULL"), R_NilValue); dd = GEcreateDevDesc(dev); Rf_addDevice((DevDesc*) dd); GEinitDisplayList(dd); return R_NilValue; } static void NULL_Circle(double x, double y, double r, R_GE_gcontext *gc, NewDevDesc *dev) { Rprintf("circle(%lf,%lf,%lf)\n&quot...

.../share/R/include/R_ext/GraphicsEngine.h:224: error: expected ?)? before ?*? token /usr/share/R/include/R_ext/GraphicsEngine.h:231: error: expected declaration specifiers or ?...? before ?NewDevDesc? javaGD.c: In function ?Rf_addJavaGDDevice?: javaGD.c:215: warning: implicit declaration of function ?GEcreateDevDesc? javaGD.c:215: warning: assignment makes pointer from integer without a cast javaGD.c: In function ?reloadJavaGD?: javaGD.c:233: error: ?GEDevDesc? has no member named ?dev? javaGD.c: In function ?javaGDobjectCall?: javaGD.c:252: error: ?GEDevDesc? has no member named ?dev? javaGD.c: In function ?j...

...17 ERROR: Undefined symbol: .vmaxset ld: 0711-317 ERROR: Undefined symbol: .R_CheckDeviceAvailable ld: 0711-317 ERROR: Undefined symbol: R_interrupts_suspended ld: 0711-317 ERROR: Undefined symbol: .Rf_mkString ld: 0711-317 ERROR: Undefined symbol: .Rf_gsetVar ld: 0711-317 ERROR: Undefined symbol: .GEcreateDevDesc ld: 0711-317 ERROR: Undefined symbol: .Rf_addDevice ld: 0711-317 ERROR: Undefined symbol: .GEinitDisplayList ld: 0711-317 ERROR: Undefined symbol: R_interrupts_pending ld: 0711-317 ERROR: Undefined symbol: .Rf_onintr ld: 0711-317 ERROR: Undefined symbol: .R_alloc ld: 0711-317 ERROR: Undefined symbo...