1 files changed, 114 insertions, 0 deletions
diff --git a/xorg-server/Xext/geext.h b/xorg-server/Xext/geext.h
new file mode 100644
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+++ b/xorg-server/Xext/geext.h
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+/*
+
+Copyright 2007 Peter Hutterer <peter@cs.unisa.edu.au>
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the author shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from the author.
+
+*/
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef _GEEXT_H_
+#define _GEEXT_H_
+#include <X11/extensions/geproto.h>
+
+
+/**
+ * This struct is used both in the window and by grabs to determine the event
+ * mask for a client.
+ * A window will have a linked list of these structs, with one entry per
+ * client per device, null-terminated.
+ * A grab has only one instance of this struct.
+ */
+typedef struct _GenericMaskRec {
+    struct _GenericMaskRec* next;
+    XID             resource;                 /* id for the resource manager */
+    DeviceIntPtr    dev;
+    Mask            eventMask[MAXEXTENSIONS]; /* one mask per extension */
+} GenericMaskRec, *GenericMaskPtr;
+
+
+/* Struct to keep information about registered extensions
+ *
+ * evswap ... use to swap event fields for different byte ordered clients.
+ * evfill ... use to fill various event fields from the given parameters.
+ */
+typedef struct _GEExtension {
+    void (*evswap)(xGenericEvent* from, xGenericEvent* to);
+    void (*evfill)(xGenericEvent* ev,
+                    DeviceIntPtr pDev,  /* device */
+                    WindowPtr pWin,     /* event window */
+                    GrabPtr pGrab       /* current grab, may be NULL */
+                    );
+} GEExtension, *GEExtensionPtr;
+
+
+/* All registered extensions and their handling functions. */
+extern GEExtension GEExtensions[MAXEXTENSIONS];
+
+/* Returns the extension offset from the event */
+#define GEEXT(ev) (((xGenericEvent*)(ev))->extension)
+
+#define GEEXTIDX(ev) (GEEXT(ev) & 0x7F)
+/* Typecast to generic event */
+#define GEV(ev) ((xGenericEvent*)(ev))
+/* True if mask is set for extension on window */
+#define GEMaskIsSet(pWin, extension, mask) \
+    ((pWin)->optional && \
+     (pWin)->optional->geMasks && \
+     ((pWin)->optional->geMasks->eventMasks[(extension) & 0x7F] & (mask)))
+
+/* Returns first client */
+#define GECLIENT(pWin) \
+    (((pWin)->optional) ? (pWin)->optional->geMasks->geClients : NULL)
+
+/* Returns the event_fill for the given event */
+#define GEEventFill(ev) \
+    GEExtensions[GEEXTIDX(xE)].evfill
+
+#define GEIsType(ev, ext, ev_type) \
+        ((ev->u.u.type == GenericEvent) &&  \
+         ((xGenericEvent*)(ev))->extension == ext && \
+         ((xGenericEvent*)(ev))->evtype == ev_type)
+
+
+/* Interface for other extensions */
+void GEWindowSetMask(ClientPtr pClient, DeviceIntPtr pDev,
+                     WindowPtr pWin, int extension, Mask mask);
+
+void GERegisterExtension(
+        int extension,
+        void (*ev_dispatch)(xGenericEvent* from, xGenericEvent* to),
+        void (*ev_fill)(xGenericEvent* ev, DeviceIntPtr pDev,
+                        WindowPtr pWin, GrabPtr pGrab)
+        );
+
+void GEInitEvent(xGenericEvent* ev, int extension);
+BOOL GEDeviceMaskIsSet(WindowPtr pWin, DeviceIntPtr pDev,
+                       int extension, Mask mask);
+
+void GEExtensionInit(void);
+
+#endif /* _GEEXT_H_ */