1 files changed, 131 insertions, 0 deletions
diff --git a/src/XrrOutput.c b/src/XrrOutput.c
new file mode 100644
index 0000000..1fe03ae
--- /dev/null
+++ b/src/XrrOutput.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright © 2006 Keith Packard
+ *
+ * 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, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <X11/Xlib.h>
+/* we need to be able to manipulate the Display structure on events */
+#include <X11/Xlibint.h>
+#include <X11/extensions/render.h>
+#include <X11/extensions/Xrender.h>
+#include "Xrandrint.h"
+
+#define OutputInfoExtra	(SIZEOF(xRRGetOutputInfoReply) - 32)
+				
+XRROutputInfo *
+XRRGetOutputInfo (Display *dpy, XRRScreenResources *resources, RROutput output)
+{
+    XExtDisplayInfo		*info = XRRFindDisplay(dpy);
+    xRRGetOutputInfoReply	rep;
+    xRRGetOutputInfoReq		*req;
+    int				nbytes, nbytesRead, rbytes;
+    int				i;
+    xRRQueryVersionReq		*vreq;
+    XRROutputInfo		*xoi;
+
+    RRCheckExtension (dpy, info, 0);
+
+    LockDisplay (dpy);
+    GetReq (RRGetOutputInfo, req);
+    req->reqType = info->codes->major_opcode;
+    req->randrReqType = X_RRGetOutputInfo;
+    req->output = output;
+    req->configTimestamp = resources->configTimestamp;
+
+    if (!_XReply (dpy, (xReply *) &rep, OutputInfoExtra >> 2, xFalse))
+    {
+	UnlockDisplay (dpy);
+	SyncHandle ();
+	return NULL;
+    }
+
+    nbytes = ((long) (rep.length) << 2) - OutputInfoExtra;
+
+    nbytesRead = (long) (rep.nCrtcs * 4 +
+			 rep.nModes * 4 +
+			 rep.nClones * 4 +
+			 ((rep.nameLength + 3) & ~3));
+
+    /* 
+     * first we must compute how much space to allocate for 
+     * randr library's use; we'll allocate the structures in a single
+     * allocation, on cleanlyness grounds.
+     */
+
+    rbytes = (sizeof (XRROutputInfo) +
+	      rep.nCrtcs * sizeof (RRCrtc) +
+	      rep.nModes * sizeof (RRMode) +
+	      rep.nClones * sizeof (RROutput) +
+	      rep.nameLength + 1);	    /* '\0' terminate name */
+
+    xoi = (XRROutputInfo *) Xmalloc(rbytes);
+    if (xoi == NULL) {
+	_XEatData (dpy, (unsigned long) nbytes);
+	UnlockDisplay (dpy);
+	SyncHandle ();
+	return NULL;
+    }
+
+    xoi->timestamp = rep.timestamp;
+    xoi->crtc = rep.crtc;
+    xoi->mm_width = rep.mmWidth;
+    xoi->mm_height = rep.mmHeight;
+    xoi->connection = rep.connection;
+    xoi->subpixel_order = rep.subpixelOrder;
+    xoi->ncrtc = rep.nCrtcs;
+    xoi->crtcs = (RRCrtc *) (xoi + 1);
+    xoi->nmode = rep.nModes;
+    xoi->npreferred = rep.nPreferred;
+    xoi->modes = (RRMode *) (xoi->crtcs + rep.nCrtcs);
+    xoi->nclone = rep.nClones;
+    xoi->clones = (RROutput *) (xoi->modes + rep.nModes);
+    xoi->name = (char *) (xoi->clones + rep.nClones);
+
+    _XRead32 (dpy, xoi->crtcs, rep.nCrtcs << 2);
+    _XRead32 (dpy, xoi->modes, rep.nModes << 2);
+    _XRead32 (dpy, xoi->clones, rep.nClones << 2);
+    
+    /*
+     * Read name and '\0' terminate
+     */
+    _XReadPad (dpy, xoi->name, rep.nameLength);
+    xoi->name[rep.nameLength] = '\0';
+    
+    /*
+     * Skip any extra data
+     */
+    if (nbytes > nbytesRead)
+	_XEatData (dpy, (unsigned long) (nbytes - nbytesRead));
+    
+    UnlockDisplay (dpy);
+    SyncHandle ();
+    return (XRROutputInfo *) xoi;
+}
+
+void
+XRRFreeOutputInfo (XRROutputInfo *outputInfo)
+{
+    Xfree (outputInfo);
+}