Add Distributed Multihead X (DMX) support

1 files changed, 248 insertions, 0 deletions

diff --git a/hw/dmx/dmxpixmap.c b/hw/dmx/dmxpixmap.c
new file mode 100644
index 000000000..a51bf3327
--- /dev/null
+++ b/hw/dmx/dmxpixmap.c
@@ -0,0 +1,248 @@
+/* $XFree86$ */
+/*
+ * Copyright 2001-2004 Red Hat Inc., Durham, North Carolina.
+ *
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation on the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) 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
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * 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.
+ */
+
+/*
+ * Authors:
+ *   Kevin E. Martin <kem@redhat.com>
+ *
+ */
+
+/** \file
+ * Provides pixmap support. */
+
+#include "dmx.h"
+#include "dmxsync.h"
+#include "dmxpixmap.h"
+
+#include "pixmapstr.h"
+#include "servermd.h"
+
+/** Initialize a private area in \a pScreen for pixmap information. */
+Bool dmxInitPixmap(ScreenPtr pScreen)
+{
+#ifdef PIXPRIV
+    if (!AllocatePixmapPrivate(pScreen, dmxPixPrivateIndex,
+			       sizeof(dmxPixPrivRec)))
+	return FALSE;
+
+    return TRUE;
+#else
+#error Must define PIXPRIV to compile DMX X server
+#endif
+}
+
+/** Create a pixmap on the back-end server. */
+void dmxBECreatePixmap(PixmapPtr pPixmap)
+{
+    ScreenPtr      pScreen   = pPixmap->drawable.pScreen;
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+    dmxPixPrivPtr  pPixPriv  = DMX_GET_PIXMAP_PRIV(pPixmap);
+
+    /* Make sure we haven't already created this pixmap.  This can
+     * happen when the pixmap is used elsewhere (e.g., as a background
+     * or border for a window) and the refcnt > 1.
+     */
+    if (pPixPriv->pixmap)
+	return;
+
+    if (pPixmap->drawable.width && pPixmap->drawable.height) {
+	pPixPriv->pixmap = XCreatePixmap(dmxScreen->beDisplay,
+					 dmxScreen->scrnWin,
+					 pPixmap->drawable.width,
+					 pPixmap->drawable.height,
+					 pPixmap->drawable.depth);
+	dmxSync(dmxScreen, FALSE);
+    }
+}
+
+/** Create a pixmap for \a pScreen with the specified \a width, \a
+ *  height, and \a depth. */
+PixmapPtr dmxCreatePixmap(ScreenPtr pScreen, int width, int height, int depth)
+{
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+    PixmapPtr      pPixmap;
+    int            bpp;
+    dmxPixPrivPtr  pPixPriv;
+
+#if 0
+    DMX_UNWRAP(CreatePixmap, dmxScreen, pScreen);
+    if (pScreen->CreatePixmap)
+	ret = pScreen->CreatePixmap(pPixmap);
+#endif
+
+    /* Create pixmap on back-end server */
+    if (depth == 24) bpp = 32;
+    else             bpp = depth;
+
+    pPixmap = AllocatePixmap(pScreen, 0);
+    if (!pPixmap)
+	return NullPixmap;
+
+    pPixmap->drawable.type = DRAWABLE_PIXMAP;
+    pPixmap->drawable.class = 0;
+    pPixmap->drawable.pScreen = pScreen;
+    pPixmap->drawable.depth = depth;
+    pPixmap->drawable.bitsPerPixel = bpp;
+    pPixmap->drawable.id = 0;
+    pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
+    pPixmap->drawable.x = 0;
+    pPixmap->drawable.y = 0;
+    pPixmap->drawable.width = width;
+    pPixmap->drawable.height = height;
+    pPixmap->devKind = PixmapBytePad(width, bpp);
+    pPixmap->refcnt = 1;
+
+    pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
+    pPixPriv->pixmap = (Pixmap)0;
+    pPixPriv->detachedImage = NULL;
+
+    /* Create the pixmap on the back-end server */
+    if (dmxScreen->beDisplay) {
+	dmxBECreatePixmap(pPixmap);
+    }
+
+#if 0
+    DMX_WRAP(CreatePixmap, dmxCreatePixmap, dmxScreen, pScreen);
+#endif
+
+    return pPixmap;
+}
+
+/** Destroy the pixmap on the back-end server. */
+Bool dmxBEFreePixmap(PixmapPtr pPixmap)
+{
+    ScreenPtr      pScreen = pPixmap->drawable.pScreen;
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+    dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
+
+    if (pPixPriv->pixmap) {
+	XFreePixmap(dmxScreen->beDisplay, pPixPriv->pixmap);
+	pPixPriv->pixmap = (Pixmap)0;
+	return TRUE;
+    }
+
+    return FALSE;
+}
+
+/** Destroy the pixmap pointed to by \a pPixmap. */
+Bool dmxDestroyPixmap(PixmapPtr pPixmap)
+{
+    ScreenPtr      pScreen = pPixmap->drawable.pScreen;
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+    Bool           ret = TRUE;
+
+#if 0
+    DMX_UNWRAP(DestroyPixmap, dmxScreen, pScreen);
+#endif
+
+    if (--pPixmap->refcnt)
+	return TRUE;
+
+    /* Destroy pixmap on back-end server */
+    if (dmxScreen->beDisplay) {
+	if (dmxBEFreePixmap(pPixmap)) {
+	    /* Also make sure that we destroy any detached image */
+	    dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
+	    if (pPixPriv->detachedImage)
+		XDestroyImage(pPixPriv->detachedImage);
+	    dmxSync(dmxScreen, FALSE);
+	}
+    }
+    xfree(pPixmap);
+
+#if 0
+    if (pScreen->DestroyPixmap)
+	ret = pScreen->DestroyPixmap(pPixmap);
+    DMX_WRAP(DestroyPixmap, dmxDestroyPixmap, dmxScreen, pScreen);
+#endif
+
+    return ret;
+}
+
+/** Create and return a region based on the pixmap pointed to by \a
+ *  pPixmap. */
+RegionPtr dmxBitmapToRegion(PixmapPtr pPixmap)
+{
+    ScreenPtr      pScreen = pPixmap->drawable.pScreen;
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+    dmxPixPrivPtr  pPixPriv = DMX_GET_PIXMAP_PRIV(pPixmap);
+    XImage        *ximage;
+    RegionPtr      pReg, pTmpReg;
+    int            x, y;
+    unsigned long  previousPixel, currentPixel;
+    BoxRec         Box;
+    Bool           overlap;
+  
+    if (!dmxScreen->beDisplay) {
+	pReg = REGION_CREATE(pScreen, NullBox, 1);
+	return pReg;
+    }
+
+    ximage = XGetImage(dmxScreen->beDisplay, pPixPriv->pixmap, 0, 0,
+		       pPixmap->drawable.width, pPixmap->drawable.height,
+		       1, XYPixmap);
+
+    pReg = REGION_CREATE(pScreen, NullBox, 1);
+    pTmpReg = REGION_CREATE(pScreen, NullBox, 1);
+    if(!pReg || !pTmpReg) return NullRegion;
+
+    for (y = 0; y < pPixmap->drawable.height; y++) {
+	Box.y1 = y;
+	Box.y2 = y + 1;
+	previousPixel = 0L;
+	for (x = 0; x < pPixmap->drawable.width; x++) {
+	    currentPixel = XGetPixel(ximage, x, y);
+	    if (previousPixel != currentPixel) {
+		if (previousPixel == 0L) { 
+		    /* left edge */
+		    Box.x1 = x;
+		} else if (currentPixel == 0L) {
+		    /* right edge */
+		    Box.x2 = x;
+		    REGION_RESET(pScreen, pTmpReg, &Box);
+		    REGION_APPEND(pScreen, pReg, pTmpReg);
+		}
+		previousPixel = currentPixel;
+	    }
+	}
+	if (previousPixel != 0L) {
+	    /* right edge because of the end of pixmap */
+	    Box.x2 = pPixmap->drawable.width;
+	    REGION_RESET(pScreen, pTmpReg, &Box);
+	    REGION_APPEND(pScreen, pReg, pTmpReg);
+	}
+    }
+  
+    REGION_DESTROY(pScreen, pTmpReg);
+    XDestroyImage(ximage);
+
+    REGION_VALIDATE(pScreen, pReg, &overlap);
+
+    dmxSync(dmxScreen, FALSE);
+    return(pReg);
+}