Steal Xinerama code from SiS driver. Add missing files.

Provide a Xinerama implementation when DIX version isn't enabled. This
version exposes each crtc as a separate 'screen' and reports the size of
that patch. The extension also sends ConfigureNotify events to the root
window whenever crtcs change so that applications will re-fetch xinerama
information. This actually works for metacity.

1 files changed, 337 insertions, 0 deletions

diff --git a/randr/rrinfo.c b/randr/rrinfo.c
new file mode 100644
index 000000000..491ac218d
--- /dev/null
+++ b/randr/rrinfo.c
@@ -0,0 +1,337 @@
+/*
+ * 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.
+ */
+
+#include "randrstr.h"
+
+#ifdef RANDR_10_INTERFACE
+static RRModePtr
+RROldModeAdd (RROutputPtr output, RRScreenSizePtr size, int refresh)
+{
+    ScreenPtr	pScreen = output->pScreen;
+    rrScrPriv(pScreen);
+    xRRModeInfo	modeInfo;
+    char	name[100];
+    RRModePtr	mode;
+    int		i;
+    RRModePtr   *modes;
+    
+    memset (&modeInfo, '\0', sizeof (modeInfo));
+    sprintf (name, "%dx%d", size->width, size->height);
+    
+    modeInfo.width = size->width;
+    modeInfo.height = size->height;
+    modeInfo.mmWidth = size->mmWidth;
+    modeInfo.mmHeight = size->mmHeight;
+    modeInfo.hTotal = size->width;
+    modeInfo.vTotal = size->height;
+    modeInfo.dotClock = ((CARD32) size->width * (CARD32) size->height *
+			 (CARD32) refresh);
+    modeInfo.nameLength = strlen (name);
+    mode = RRModeGet (pScreen, &modeInfo, name);
+    if (!mode)
+	return NULL;
+    for (i = 0; i < output->numModes; i++)
+	if (output->modes[i] == mode)
+	{
+	    RRModeDestroy (mode);
+	    return mode;
+	}
+    
+    if (output->numModes)
+	modes = xrealloc (output->modes, 
+			  (output->numModes + 1) * sizeof (RRModePtr));
+    else
+	modes = xalloc (sizeof (RRModePtr));
+    if (!modes)
+    {
+	RRModeDestroy (mode);
+	FreeResource (mode->mode.id, 0);
+	return NULL;
+    }
+    modes[output->numModes++] = mode;
+    output->modes = modes;
+    output->changed = TRUE;
+    pScrPriv->changed = TRUE;
+    return mode;
+}
+
+static void
+RRScanOldConfig (ScreenPtr pScreen, Rotation rotations)
+{
+    rrScrPriv(pScreen);
+    RROutputPtr	output;
+    RRCrtcPtr	crtc;
+    RRModePtr	mode, newMode = NULL;
+    int		i;
+    CARD16	minWidth = MAXSHORT, minHeight = MAXSHORT;
+    CARD16	maxWidth = 0, maxHeight = 0;
+    
+    /*
+     * First time through, create a crtc and output and hook
+     * them together
+     */
+    if (pScrPriv->numOutputs == 0 &&
+	pScrPriv->numCrtcs == 0)
+    {
+	crtc = RRCrtcCreate (pScreen, NULL);
+	if (!crtc)
+	    return;
+	output = RROutputCreate (pScreen, "default", 7, NULL);
+	if (!output)
+	    return;
+	RROutputSetCrtcs (output, &crtc, 1);
+	RROutputSetCrtc (output, crtc);
+	RROutputSetConnection (output, RR_Connected);
+#ifdef RENDER
+	RROutputSetSubpixelOrder (output, PictureGetSubpixelOrder (pScreen));
+#endif
+    }
+
+    output = RRFirstOutput (pScreen);
+    if (!output)
+	return;
+    crtc = output->crtc;
+
+    /* check rotations */
+    if (rotations != crtc->rotations)
+    {
+        crtc->rotations = rotations;
+	crtc->changed = TRUE;
+	pScrPriv->changed = TRUE;
+    }
+	
+    /* regenerate mode list */
+    for (i = 0; i < pScrPriv->nSizes; i++)
+    {
+	RRScreenSizePtr	size = &pScrPriv->pSizes[i];
+	int		r;
+
+	if (size->nRates)
+	{
+	    for (r = 0; r < size->nRates; r++)
+	    {
+		mode = RROldModeAdd (output, size, size->pRates[r].rate);
+		if (i == pScrPriv->size && 
+		    size->pRates[r].rate == pScrPriv->rate)
+		{
+		    newMode = mode;
+		}
+	    }
+	    xfree (size->pRates);
+	}
+	else
+	{
+	    mode = RROldModeAdd (output, size, 0);
+	    if (i == pScrPriv->size)
+		newMode = mode;
+	}
+    }
+    if (pScrPriv->nSizes)
+	xfree (pScrPriv->pSizes);
+    pScrPriv->pSizes = NULL;
+    pScrPriv->nSizes = 0;
+	    
+    /* find size bounds */
+    for (i = 0; i < output->numModes; i++) 
+    {
+	RRModePtr   mode = output->modes[i];
+        CARD16	    width = mode->mode.width;
+        CARD16	    height = mode->mode.height;
+	
+	if (width < minWidth) minWidth = width;
+	if (width > maxWidth) maxWidth = width;
+	if (height < minHeight) minHeight = height;
+	if (height > maxHeight) maxHeight = height;
+    }
+
+    if (minWidth != pScrPriv->minWidth) {
+	pScrPriv->minWidth = minWidth; pScrPriv->changed = TRUE;
+    }
+    if (maxWidth != pScrPriv->maxWidth) {
+	pScrPriv->maxWidth = maxWidth; pScrPriv->changed = TRUE;
+    }
+    if (minHeight != pScrPriv->minHeight) {
+	pScrPriv->minHeight = minHeight; pScrPriv->changed = TRUE;
+    }
+    if (maxHeight != pScrPriv->maxHeight) {
+	pScrPriv->maxHeight = maxHeight; pScrPriv->changed = TRUE;
+    }
+
+    /* notice current mode */
+    if (newMode)
+	RRCrtcNotify (output->crtc, newMode, 0, 0, pScrPriv->rotation,
+		      1, &output);
+}
+#endif
+
+/*
+ * Poll the driver for changed information
+ */
+Bool
+RRGetInfo (ScreenPtr pScreen)
+{
+    rrScrPriv (pScreen);
+    Rotation	    rotations;
+    int		    i;
+
+    for (i = 0; i < pScrPriv->numOutputs; i++)
+	pScrPriv->outputs[i]->changed = FALSE;
+    for (i = 0; i < pScrPriv->numCrtcs; i++)
+	pScrPriv->crtcs[i]->changed = FALSE;
+    
+    rotations = 0;
+    pScrPriv->changed = FALSE;
+    
+    if (!(*pScrPriv->rrGetInfo) (pScreen, &rotations))
+	return FALSE;
+
+#if RANDR_10_INTERFACE
+    if (pScrPriv->nSizes)
+	RRScanOldConfig (pScreen, rotations);
+#endif
+    RRTellChanged (pScreen);
+    return TRUE;
+}
+
+#if RANDR_12_INTERFACE
+/*
+ * Register the range of sizes for the screen
+ */
+void
+RRScreenSetSizeRange (ScreenPtr	pScreen,
+		      CARD16	minWidth,
+		      CARD16	minHeight,
+		      CARD16	maxWidth,
+		      CARD16	maxHeight)
+{
+    rrScrPriv (pScreen);
+
+    if (!pScrPriv)
+	return;
+    pScrPriv->minWidth  = minWidth;
+    pScrPriv->minHeight = minHeight;
+    pScrPriv->maxWidth  = maxWidth;
+    pScrPriv->maxHeight = maxHeight;
+}
+#endif
+
+#ifdef RANDR_10_INTERFACE
+static Bool
+RRScreenSizeMatches (RRScreenSizePtr  a,
+		   RRScreenSizePtr  b)
+{
+    if (a->width != b->width)
+	return FALSE;
+    if (a->height != b->height)
+	return FALSE;
+    if (a->mmWidth != b->mmWidth)
+	return FALSE;
+    if (a->mmHeight != b->mmHeight)
+	return FALSE;
+    return TRUE;
+}
+
+RRScreenSizePtr
+RRRegisterSize (ScreenPtr	    pScreen,
+		short		    width, 
+		short		    height,
+		short		    mmWidth,
+		short		    mmHeight)
+{
+    rrScrPriv (pScreen);
+    int		    i;
+    RRScreenSize    tmp;
+    RRScreenSizePtr pNew;
+
+    if (!pScrPriv)
+	return 0;
+    
+    tmp.id = 0;
+    tmp.width = width;
+    tmp.height= height;
+    tmp.mmWidth = mmWidth;
+    tmp.mmHeight = mmHeight;
+    tmp.pRates = 0;
+    tmp.nRates = 0;
+    for (i = 0; i < pScrPriv->nSizes; i++)
+	if (RRScreenSizeMatches (&tmp, &pScrPriv->pSizes[i]))
+	    return &pScrPriv->pSizes[i];
+    pNew = xrealloc (pScrPriv->pSizes,
+		     (pScrPriv->nSizes + 1) * sizeof (RRScreenSize));
+    if (!pNew)
+	return 0;
+    pNew[pScrPriv->nSizes++] = tmp;
+    pScrPriv->pSizes = pNew;
+    return &pNew[pScrPriv->nSizes-1];
+}
+
+Bool RRRegisterRate (ScreenPtr		pScreen,
+		     RRScreenSizePtr	pSize,
+		     int		rate)
+{
+    rrScrPriv(pScreen);
+    int		    i;
+    RRScreenRatePtr pNew, pRate;
+
+    if (!pScrPriv)
+	return FALSE;
+    
+    for (i = 0; i < pSize->nRates; i++)
+	if (pSize->pRates[i].rate == rate)
+	    return TRUE;
+
+    pNew = xrealloc (pSize->pRates,
+		     (pSize->nRates + 1) * sizeof (RRScreenRate));
+    if (!pNew)
+	return FALSE;
+    pRate = &pNew[pSize->nRates++];
+    pRate->rate = rate;
+    pSize->pRates = pNew;
+    return TRUE;
+}
+
+Rotation
+RRGetRotation(ScreenPtr pScreen)
+{
+    RROutputPtr	output = RRFirstOutput (pScreen);
+
+    if (!output)
+	return RR_Rotate_0;
+
+    return output->crtc->rotation;
+}
+
+void
+RRSetCurrentConfig (ScreenPtr		pScreen,
+		    Rotation		rotation,
+		    int			rate,
+		    RRScreenSizePtr	pSize)
+{
+    rrScrPriv (pScreen);
+
+    if (!pScrPriv)
+	return;
+    pScrPriv->size = pSize - pScrPriv->pSizes;
+    pScrPriv->rotation = rotation;
+    pScrPriv->rate = rate;
+}
+#endif