Adding source/Platform/Unix/X11SharedDisplay.cpp

engine.build.lua

@@ -64,6 +64,7 @@ if TARGET_OS == "Win32" then
 elseif TARGET_OS == "Unix" then
 	platform_spec_module = Module("source/Platform/Unix", {
 		"UnixApplication.cpp",
+		"X11SharedDisplay.cpp",
 		"X11Display.cpp",
 		"GLXContext.cpp",
 		"X11Input.cpp",

source/Platform/Unix/X11SharedDisplay.cpp

@@ -0,0 +1,32 @@
+
+#include "X11SharedDisplay.h"
+
+namespace sp {
+
+// Define a global display (for simplicity, we always connect to local one.)
+::Display* sharedDisplay = NULL;
+unsigned int refcount = 0;
+
+::Display* XGetDisplay() {
+
+	// Create if we dont have any references.
+	if (refcount == 0) {
+		sharedDisplay = XOpenDisplay(NULL);
+	}
+
+	refcount++;
+	return sharedDisplay;
+}
+
+void XReleaseDisplay() {
+
+	if (refcount < 1) {
+		return;
+	}
+
+	if (--refcount == 0) {
+		XCloseDisplay(sharedDisplay);
+	}
+}
+
+} // namespace sp

source/Platform/Unix/X11SharedDisplay.h

@@ -0,0 +1,15 @@
+
+#ifndef SPECTRE_PLATFORM_UNIX_X11SHAREDDISPLAY_H
+#define SPECTRE_PLATFORM_UNIX_X11SHAREDDISPLAY_H
+
+#include <X11/Xlib.h>
+
+namespace sp {
+
+::Display* XGetDisplay();
+
+void XReleaseDisplay();
+
+} // namespace sp
+
+#endif /* SPECTRE_PLATFORM_UNIX_X11SHAREDDISPLAY_H */