Initial Present infrastructure.

configure.ac

@@ -294,6 +294,16 @@ if test "x$enable_composite" = "xyes"; then
 fi
 AM_CONDITIONAL(ENABLE_COMPOSITE, test "x$enable_composite" = "xyes")
 
+AC_ARG_ENABLE(xpresent,
+  AC_HELP_STRING([--enable-xpresent], [compile with Present support (experimental) @<:@default=no@:>@]),,
+  enable_xpresent=no)
+if test "x$enable_xpresent" = "xyes"; then
+  PKG_CHECK_MODULES(XPRESENT, xpresent,
+    AC_DEFINE(USE_XPRESENT, 1, [Present support]),
+    enable_xpresent=no
+    AC_MSG_WARN([Present support was requested but not found]) )
+fi
+
 AC_ARG_ENABLE(zoom,
   AC_HELP_STRING([--enable-zoom], [compile with zoom support @<:@default=yes@:>@]),,
   enable_zoom=yes)
@@ -514,6 +524,7 @@ echo "  GLX .......................... $enable_glx"
 echo "  ScreenSaver .................. $enable_xscrnsaver"
 echo "  D-Bus ........................ $enable_dbus"
 echo "  XI2 .......................... $enable_xi2"
+echo "  Present....................... $enable_xpresent"
 echo "  Use container window ......... $enable_container"
 echo
 echo "Installation path .............. $prefix"

src/E.h

@@ -126,6 +126,7 @@
 #define XEXT_RENDER      8
 #define XEXT_GLX         9
 #define XEXT_XI         10
+#define XEXT_PRESENT    11
 
 #define XEXT_CM_ALL     16
 

src/Makefile.am

@@ -135,6 +135,7 @@ e16_CPPFLAGS = \
 	$(DBUS_CFLAGS) \
 	$(XI_CFLAGS) \
 	$(XRANDR_CFLAGS) \
+	$(XPRESENT_CFLAGS) \
 	$(X_CFLAGS)
 
 LDADD = \
@@ -145,6 +146,7 @@ LDADD = \
 	$(GLX_LIBS)		\
 	$(XI_LIBS)		\
 	$(XRANDR_LIBS)		\
+	$(XPRESENT_LIBS)	\
 	$(X_LIBS)		\
 	$(SM_LIBS)		\
 	$(XINERAMA_LIBS)	\

src/edebug.h

@@ -57,6 +57,7 @@
 #define EDBUG_TYPE_XI2          153
 #define EDBUG_TYPE_ZOOM         154
 #define EDBUG_TYPE_ANIM         155
+#define EDBUG_TYPE_PRESENT      156
 
 #define EDBUG_TYPE_COMPMGR      161
 #define EDBUG_TYPE_COMPMGR2     162

src/events.c

@@ -50,13 +50,16 @@
 #include <X11/extensions/Xfixes.h>
 #include <X11/extensions/Xrender.h>
 #endif
+#if USE_XPRESENT
+#include <X11/extensions/Xpresent.h>
+#endif
 #if USE_GLX
 #include <GL/glx.h>
 #endif
 #if USE_XI2
 #include <X11/extensions/XInput2.h>
 #endif
-#define USE_GENERIC defined(USE_XI2)
+#define USE_GENERIC defined(USE_XI2) || defined(USE_XPRESENT)
 
 #if ENABLE_DEBUG_EVENTS
 static const char  *EventName(unsigned int type);
@@ -78,7 +81,7 @@ typedef struct {
    void                (*init) (int avaliable);
 } EServerExt;
 
-static EServerExtData ExtData[11];
+static EServerExtData ExtData[12];
 
 #define event_base_shape ExtData[XEXT_SHAPE].event_base
 #define event_base_randr ExtData[XEXT_RANDR].event_base
@@ -249,6 +252,21 @@ ExtInitInput(int available)
 }
 #endif
 
+#if USE_XPRESENT
+static void
+ExtInitPresent(int available)
+{
+   if (!available)
+      return;
+
+   if (EDebug(EDBUG_TYPE_VERBOSE))
+     {
+	Eprintf(" Capabilities: %#x\n",
+		XPresentQueryCapabilities(disp, WinGetXwin(VROOT)));
+     }
+}
+#endif
+
 static const EServerExt Extensions[] = {
    {"SHAPE", XEXT_SHAPE, XShapeQueryVersion, ExtInitShape},
 #if USE_XSYNC
@@ -275,6 +293,9 @@ static const EServerExt Extensions[] = {
 #if USE_XI2
    {"XInputExtension", XEXT_XI, EInputQueryVersion, ExtInitInput},
 #endif
+#if USE_XPRESENT
+   {"Present", XEXT_PRESENT, XPresentQueryVersion, ExtInitPresent},
+#endif
 };
 
 static void
@@ -888,6 +909,25 @@ _EventFetchXI2(XEvent * ev)
 }
 #endif /* USE_XI2 */
 
+#if USE_XPRESENT
+typedef union {
+   XPresentEvent       xpe;
+   XPresentConfigureNotifyEvent conf;
+   XPresentCompleteNotifyEvent cmpl;
+   XPresentIdleNotifyEvent idle;
+} xpe_t;
+
+static void
+_EventFetchPresent(XEvent * ev)
+{
+   xpe_t              *xpe = (xpe_t *) ev->xcookie.data;
+
+   if (EDebug(EDBUG_TYPE_PRESENT))
+      Eprintf("%s: %#lx: type=%d\n",
+	      __func__, xpe->idle.window, xpe->xpe.evtype);
+}
+#endif /* USE_XPRESENT */
+
 static void
 _EventFetchGeneric(XEvent * ev)
 {
@@ -904,6 +944,13 @@ _EventFetchGeneric(XEvent * ev)
 	_EventFetchXI2(ev);
 	goto done;
      }
+#endif
+#if USE_XPRESENT
+   if (ev->xcookie.extension == ExtData[XEXT_PRESENT].major_op)
+     {
+	_EventFetchPresent(ev);
+	goto done;
+     }
 #endif
    /* We should never go here */
    Eprintf("*** %s: ext=%d type=%d\n", __func__,