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//
// Wayland-specific code to initialize wayland support.
//
// Copyright 2022-2023 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include <FL/fl_config.h>
#include "Fl_Wayland_Copy_Surface_Driver.H"
#include "Fl_Wayland_Graphics_Driver.H"
#include "Fl_Wayland_Screen_Driver.H"
#include "../Unix/Fl_Unix_System_Driver.H"
#include "Fl_Wayland_Window_Driver.H"
#include "Fl_Wayland_Image_Surface_Driver.H"
#include "../Base/Fl_Base_Pen_Events.H"
#ifdef FLTK_USE_X11
# include "../Xlib/Fl_Xlib_Copy_Surface_Driver.H"
# include "../Cairo/Fl_X11_Cairo_Graphics_Driver.H"
# include "../X11/Fl_X11_Screen_Driver.H"
# include "../X11/Fl_X11_Window_Driver.H"
# include "../Xlib/Fl_Xlib_Image_Surface_Driver.H"
#endif
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef FLTK_USE_X11
static bool attempt_wayland() {
if (Fl_Wayland_Screen_Driver::wl_display) return true;
static bool first = true;
static bool disable_wl = false;
if (first) { // get the value if it exists and cache it
void *sym = Fl_Posix_System_Driver::dlopen_or_dlsym(NULL, "fl_disable_wayland");
if (sym) {
disable_wl = *(bool *)sym;
// printf("fl_disable_wayland = %s\n", disable_wl ? "true" : "false");
}
first = false;
}
if (disable_wl)
return false;
const char *backend = ::getenv("FLTK_BACKEND");
// fprintf(stderr, "FLTK_BACKEND='%s'\n", backend ? backend : "");
if (backend && strcmp(backend, "x11") == 0) {
return false;
}
if (backend && strcmp(backend, "wayland") == 0) {
Fl_Wayland_Screen_Driver::wl_display = wl_display_connect(NULL);
if (!Fl_Wayland_Screen_Driver::wl_display) {
fprintf(stderr, "Error: no Wayland connection available, FLTK_BACKEND='wayland'\n");
exit(1);
}
return true;
}
if (!backend) {
// env var XDG_RUNTIME_DIR is required for Wayland
const char *xdgrt = ::getenv("XDG_RUNTIME_DIR");
if (xdgrt) {
// is a Wayland connection available ?
Fl_Wayland_Screen_Driver::wl_display = wl_display_connect(NULL);
if (Fl_Wayland_Screen_Driver::wl_display) { // Yes, use Wayland drivers
// puts("using wayland");
return true;
}
}
// no Wayland connection or environment variable XDG_RUNTIME_DIR not set,
// falling back to X11
return false;
}
fprintf(stderr, "Error: unexpected value of FLTK_BACKEND: '%s'\n", backend);
exit(1);
return false;
}
#endif // FLTK_USE_X11
Fl_System_Driver *Fl_System_Driver::newSystemDriver() {
return new Fl_Unix_System_Driver();
}
Fl_Graphics_Driver *Fl_Graphics_Driver::newMainGraphicsDriver() {
#ifdef FLTK_USE_X11
if (!attempt_wayland()) return new Fl_X11_Cairo_Graphics_Driver();
#endif
return new Fl_Wayland_Graphics_Driver();
}
Fl_Copy_Surface_Driver *Fl_Copy_Surface_Driver::newCopySurfaceDriver(int w, int h) {
#ifdef FLTK_USE_X11
if (!Fl_Wayland_Screen_Driver::wl_display) return new Fl_Xlib_Copy_Surface_Driver(w, h);
#endif
return new Fl_Wayland_Copy_Surface_Driver(w, h);
}
Fl_Screen_Driver *Fl_Screen_Driver::newScreenDriver() {
if (!Fl_Screen_Driver::system_driver) Fl::system_driver();
#ifdef FLTK_USE_X11
if (attempt_wayland()) {
return new Fl_Wayland_Screen_Driver();
}
Fl_X11_Screen_Driver *d = new Fl_X11_Screen_Driver();
for (int i = 0; i < MAX_SCREENS; i++) d->screens[i].scale = 1;
d->current_xft_dpi = 0.; // means the value of the Xft.dpi resource is still unknown
return d;
#else
return new Fl_Wayland_Screen_Driver();
#endif
}
Fl_Window_Driver *Fl_Window_Driver::newWindowDriver(Fl_Window *w)
{
#ifdef FLTK_USE_X11
if (!attempt_wayland()) return new Fl_X11_Window_Driver(w);
#endif
return new Fl_Wayland_Window_Driver(w);
}
Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen off)
{
#ifdef FLTK_USE_X11
if (!attempt_wayland())
return new Fl_Xlib_Image_Surface_Driver(w, h, high_res, off);
#endif
return new Fl_Wayland_Image_Surface_Driver(w, h, high_res, off);
}
#if defined(FLTK_HAVE_PEN_SUPPORT)
namespace Fl {
namespace Pen {
Driver default_driver;
Driver& driver = default_driver;
} // namespace Pen
} // namespace Fl
#endif // FLTK_HAVE_PEN_SUPPORT
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