svn merge -r588:HEAD ^/branches/released .

1 files changed, 383 insertions, 383 deletions

diff --git a/xorg-server/fb/fbpixmap.c b/xorg-server/fb/fbpixmap.c
index c4c2c4aa7..4714ef22e 100644
--- a/xorg-server/fb/fbpixmap.c
+++ b/xorg-server/fb/fbpixmap.c
@@ -1,383 +1,383 @@
-/*
- * Copyright © 1998 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 Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission.  Keith Packard makes no
- * representations about the suitability of this software for any purpose.  It
- * is provided "as is" without express or implied warranty.
- *
- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL KEITH PACKARD 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_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdlib.h>
-
-#include "fb.h"
-
-PixmapPtr
-fbCreatePixmapBpp (ScreenPtr pScreen, int width, int height, int depth, int bpp,
-		   unsigned usage_hint)
-{
-    PixmapPtr	pPixmap;
-    size_t	datasize;
-    size_t	paddedWidth;
-    int		adjust;
-    int		base;
-
-    paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (FbBits);
-    if (paddedWidth / 4 > 32767 || height > 32767)
-	return NullPixmap;
-    datasize = height * paddedWidth;
-    base = pScreen->totalPixmapSize;
-    adjust = 0;
-    if (base & 7)
-	adjust = 8 - (base & 7);
-    datasize += adjust;
-#ifdef FB_DEBUG
-    datasize += 2 * paddedWidth;
-#endif
-    pPixmap = AllocatePixmap(pScreen, datasize);
-    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 = paddedWidth;
-    pPixmap->refcnt = 1;
-    pPixmap->devPrivate.ptr = (pointer) ((char *)pPixmap + base + adjust);
-#ifdef FB_DEBUG
-    pPixmap->devPrivate.ptr = (void *) ((char *) pPixmap->devPrivate.ptr + paddedWidth);
-    fbInitializeDrawable (&pPixmap->drawable);
-#endif
-
-#ifdef COMPOSITE
-    pPixmap->screen_x = 0;
-    pPixmap->screen_y = 0;
-#endif
-
-    pPixmap->usage_hint = usage_hint;
-
-    return pPixmap;
-}
-
-PixmapPtr
-fbCreatePixmap (ScreenPtr pScreen, int width, int height, int depth,
-		unsigned usage_hint)
-{
-    int	bpp;
-    bpp = BitsPerPixel (depth);
-#ifdef FB_SCREEN_PRIVATE
-    if (bpp == 32 && depth <= 24)
-	bpp = fbGetScreenPrivate(pScreen)->pix32bpp;
-#endif
-    return fbCreatePixmapBpp (pScreen, width, height, depth, bpp, usage_hint);
-}
-
-Bool
-fbDestroyPixmap (PixmapPtr pPixmap)
-{
-    if(--pPixmap->refcnt)
-	return TRUE;
-    dixFreePrivates(pPixmap->devPrivates);
-    xfree(pPixmap);
-    return TRUE;
-}
-
-#define ADDRECT(reg,r,fr,rx1,ry1,rx2,ry2)			\
-if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&			\
-    (!((reg)->data->numRects &&					\
-       ((r-1)->y1 == (ry1)) &&					\
-       ((r-1)->y2 == (ry2)) &&					\
-       ((r-1)->x1 <= (rx1)) &&					\
-       ((r-1)->x2 >= (rx2)))))					\
-{								\
-    if ((reg)->data->numRects == (reg)->data->size)		\
-    {								\
-	miRectAlloc(reg, 1);					\
-	fr = REGION_BOXPTR(reg);				\
-	r = fr + (reg)->data->numRects;				\
-    }								\
-    r->x1 = (rx1);						\
-    r->y1 = (ry1);						\
-    r->x2 = (rx2);						\
-    r->y2 = (ry2);						\
-    (reg)->data->numRects++;					\
-    if(r->x1 < (reg)->extents.x1)				\
-	(reg)->extents.x1 = r->x1;				\
-    if(r->x2 > (reg)->extents.x2)				\
-	(reg)->extents.x2 = r->x2;				\
-    r++;							\
-}
-
-/* Convert bitmap clip mask into clipping region. 
- * First, goes through each line and makes boxes by noting the transitions
- * from 0 to 1 and 1 to 0.
- * Then it coalesces the current line with the previous if they have boxes
- * at the same X coordinates.
- */
-RegionPtr
-fbPixmapToRegion(PixmapPtr pPix)
-{
-    register RegionPtr	pReg;
-    FbBits		*pw, w;
-    register int	ib;
-    int			width, h, base, rx1 = 0, crects;
-    FbBits		*pwLineEnd;
-    int			irectPrevStart, irectLineStart;
-    register BoxPtr	prectO, prectN;
-    BoxPtr		FirstRect, rects, prectLineStart;
-    Bool		fInBox, fSame;
-    register FbBits	mask0 = FB_ALLONES & ~FbScrRight(FB_ALLONES, 1);
-    FbBits		*pwLine;
-    int			nWidth;
-    
-    pReg = REGION_CREATE(pPix->drawable.pScreen, NULL, 1);
-    if(!pReg)
-	return NullRegion;
-    FirstRect = REGION_BOXPTR(pReg);
-    rects = FirstRect;
-
-    fbPrepareAccess(&pPix->drawable);
-
-    pwLine = (FbBits *) pPix->devPrivate.ptr;
-    nWidth = pPix->devKind >> (FB_SHIFT-3);
-
-    width = pPix->drawable.width;
-    pReg->extents.x1 = width - 1;
-    pReg->extents.x2 = 0;
-    irectPrevStart = -1;
-    for(h = 0; h < pPix->drawable.height; h++)
-    {
-	pw = pwLine;
-	pwLine += nWidth;
-	irectLineStart = rects - FirstRect;
-	/* If the Screen left most bit of the word is set, we're starting in
-	 * a box */
-	if(READ(pw) & mask0)
-	{
-	    fInBox = TRUE;
-	    rx1 = 0;
-	}
-	else
-	    fInBox = FALSE;
-	/* Process all words which are fully in the pixmap */
-	pwLineEnd = pw + (width >> FB_SHIFT);
-	for (base = 0; pw < pwLineEnd; base += FB_UNIT)
-	{
-	    w = READ(pw++);
-	    if (fInBox)
-	    {
-		if (!~w)
-		    continue;
-	    }
-	    else
-	    {
-		if (!w)
-		    continue;
-	    }
-	    for(ib = 0; ib < FB_UNIT; ib++)
-	    {
-	        /* If the Screen left most bit of the word is set, we're
-		 * starting a box */
-		if(w & mask0)
-		{
-		    if(!fInBox)
-		    {
-			rx1 = base + ib;
-			/* start new box */
-			fInBox = TRUE;
-		    }
-		}
-		else
-		{
-		    if(fInBox)
-		    {
-			/* end box */
-			ADDRECT(pReg, rects, FirstRect,
-				rx1, h, base + ib, h + 1);
-			fInBox = FALSE;
-		    }
-		}
-		/* Shift the word VISUALLY left one. */
-		w = FbScrLeft(w, 1);
-	    }
-	}
-	if(width & FB_MASK)
-	{
-	    /* Process final partial word on line */
-	    w = READ(pw++);
-	    for(ib = 0; ib < (width & FB_MASK); ib++)
-	    {
-	        /* If the Screen left most bit of the word is set, we're
-		 * starting a box */
-		if(w & mask0)
-		{
-		    if(!fInBox)
-		    {
-			rx1 = base + ib;
-			/* start new box */
-			fInBox = TRUE;
-		    }
-		}
-		else
-		{
-		    if(fInBox)
-		    {
-			/* end box */
-			ADDRECT(pReg, rects, FirstRect,
-				rx1, h, base + ib, h + 1);
-			fInBox = FALSE;
-		    }
-		}
-		/* Shift the word VISUALLY left one. */
-		w = FbScrLeft(w, 1);
-	    }
-	}
-	/* If scanline ended with last bit set, end the box */
-	if(fInBox)
-	{
-	    ADDRECT(pReg, rects, FirstRect,
-		    rx1, h, base + (width & FB_MASK), h + 1);
-	}
-	/* if all rectangles on this line have the same x-coords as
-	 * those on the previous line, then add 1 to all the previous  y2s and 
-	 * throw away all the rectangles from this line 
-	 */
-	fSame = FALSE;
-	if(irectPrevStart != -1)
-	{
-	    crects = irectLineStart - irectPrevStart;
-	    if(crects == ((rects - FirstRect) - irectLineStart))
-	    {
-	        prectO = FirstRect + irectPrevStart;
-	        prectN = prectLineStart = FirstRect + irectLineStart;
-		fSame = TRUE;
-	        while(prectO < prectLineStart)
-		{
-		    if((prectO->x1 != prectN->x1) || (prectO->x2 != prectN->x2))
-		    {
-			  fSame = FALSE;
-			  break;
-		    }
-		    prectO++;
-		    prectN++;
-		}
-		if (fSame)
-		{
-		    prectO = FirstRect + irectPrevStart;
-		    while(prectO < prectLineStart)
-		    {
-			prectO->y2 += 1;
-			prectO++;
-		    }
-		    rects -= crects;
-		    pReg->data->numRects -= crects;
-		}
-	    }
-	}
-	if(!fSame)
-	    irectPrevStart = irectLineStart;
-    }
-    if (!pReg->data->numRects)
-	pReg->extents.x1 = pReg->extents.x2 = 0;
-    else
-    {
-	pReg->extents.y1 = REGION_BOXPTR(pReg)->y1;
-	pReg->extents.y2 = REGION_END(pReg)->y2;
-	if (pReg->data->numRects == 1)
-	{
-	    xfree(pReg->data);
-	    pReg->data = (RegDataPtr)NULL;
-	}
-    }
-
-    fbFinishAccess(&pPix->drawable);
-#ifdef DEBUG
-    if (!miValidRegion(pReg))
-	FatalError("Assertion failed file %s, line %d: expr\n", __FILE__, __LINE__);
-#endif
-    return(pReg);
-}
-
-#ifdef FB_DEBUG
-
-#include <stdio.h>
-
-static Bool
-fbValidateBits (FbStip *bits, int stride, FbStip data)
-{
-    while (stride--)
-    {
-	if (*bits != data)
-	{
-	    fprintf (stderr, "fbValidateBits failed at 0x%x (is 0x%x want 0x%x)\n",bits, *bits, data);
-	    return FALSE;
-	}
-	bits++;
-    }
-}
-
-void
-fbValidateDrawable (DrawablePtr pDrawable)
-{
-    FbStip	*bits, *first, *last;
-    int		stride, bpp;
-    int		xoff, yoff;
-    int		height;
-    Bool	failed;
-    
-    if (pDrawable->type != DRAWABLE_PIXMAP)
-	pDrawable = (DrawablePtr) fbGetWindowPixmap(pDrawable);
-    fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
-    first = bits - stride;
-    last = bits + stride * pDrawable->height;
-    if (!fbValidateBits (first, stride, FB_HEAD_BITS) ||
-	!fbValidateBits (last, stride, FB_TAIL_BITS))
-	fbInitializeDrawable(pDrawable);
-    fbFinishAccess (pDrawable);
-}
-
-void
-fbSetBits (FbStip *bits, int stride, FbStip data)
-{
-    while (stride--)
-	*bits++ = data;
-}
-
-void
-fbInitializeDrawable (DrawablePtr pDrawable)
-{
-    FbStip  *bits, *first, *last;
-    int	    stride, bpp;
-    int	    xoff, yoff;
-    
-    fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);
-    first = bits - stride;
-    last = bits + stride * pDrawable->height;
-    fbSetBits (first, stride, FB_HEAD_BITS);
-    fbSetBits (last, stride, FB_TAIL_BITS);
-    fbFinishAccess (pDrawable);
-}
-#endif /* FB_DEBUG */
+/*

+ * Copyright © 1998 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 Keith Packard not be used in

+ * advertising or publicity pertaining to distribution of the software without

+ * specific, written prior permission.  Keith Packard makes no

+ * representations about the suitability of this software for any purpose.  It

+ * is provided "as is" without express or implied warranty.

+ *

+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,

+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO

+ * EVENT SHALL KEITH PACKARD 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_DIX_CONFIG_H

+#include <dix-config.h>

+#endif

+

+#include <stdlib.h>

+

+#include "fb.h"

+

+PixmapPtr

+fbCreatePixmapBpp (ScreenPtr pScreen, int width, int height, int depth, int bpp,

+		   unsigned usage_hint)

+{

+    PixmapPtr	pPixmap;

+    size_t	datasize;

+    size_t	paddedWidth;

+    int		adjust;

+    int		base;

+

+    paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (FbBits);

+    if (paddedWidth / 4 > 32767 || height > 32767)

+	return NullPixmap;

+    datasize = height * paddedWidth;

+    base = pScreen->totalPixmapSize;

+    adjust = 0;

+    if (base & 7)

+	adjust = 8 - (base & 7);

+    datasize += adjust;

+#ifdef FB_DEBUG

+    datasize += 2 * paddedWidth;

+#endif

+    pPixmap = AllocatePixmap(pScreen, datasize);

+    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 = paddedWidth;

+    pPixmap->refcnt = 1;

+    pPixmap->devPrivate.ptr = (pointer) ((char *)pPixmap + base + adjust);

+#ifdef FB_DEBUG

+    pPixmap->devPrivate.ptr = (void *) ((char *) pPixmap->devPrivate.ptr + paddedWidth);

+    fbInitializeDrawable (&pPixmap->drawable);

+#endif

+

+#ifdef COMPOSITE

+    pPixmap->screen_x = 0;

+    pPixmap->screen_y = 0;

+#endif

+

+    pPixmap->usage_hint = usage_hint;

+

+    return pPixmap;

+}

+

+PixmapPtr

+fbCreatePixmap (ScreenPtr pScreen, int width, int height, int depth,

+		unsigned usage_hint)

+{

+    int	bpp;

+    bpp = BitsPerPixel (depth);

+#ifdef FB_SCREEN_PRIVATE

+    if (bpp == 32 && depth <= 24)

+	bpp = fbGetScreenPrivate(pScreen)->pix32bpp;

+#endif

+    return fbCreatePixmapBpp (pScreen, width, height, depth, bpp, usage_hint);

+}

+

+Bool

+fbDestroyPixmap (PixmapPtr pPixmap)

+{

+    if(--pPixmap->refcnt)

+	return TRUE;

+    dixFreePrivates(pPixmap->devPrivates);

+    free(pPixmap);

+    return TRUE;

+}

+

+#define ADDRECT(reg,r,fr,rx1,ry1,rx2,ry2)			\

+if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&			\

+    (!((reg)->data->numRects &&					\

+       ((r-1)->y1 == (ry1)) &&					\

+       ((r-1)->y2 == (ry2)) &&					\

+       ((r-1)->x1 <= (rx1)) &&					\

+       ((r-1)->x2 >= (rx2)))))					\

+{								\

+    if ((reg)->data->numRects == (reg)->data->size)		\

+    {								\

+	miRectAlloc(reg, 1);					\

+	fr = REGION_BOXPTR(reg);				\

+	r = fr + (reg)->data->numRects;				\

+    }								\

+    r->x1 = (rx1);						\

+    r->y1 = (ry1);						\

+    r->x2 = (rx2);						\

+    r->y2 = (ry2);						\

+    (reg)->data->numRects++;					\

+    if(r->x1 < (reg)->extents.x1)				\

+	(reg)->extents.x1 = r->x1;				\

+    if(r->x2 > (reg)->extents.x2)				\

+	(reg)->extents.x2 = r->x2;				\

+    r++;							\

+}

+

+/* Convert bitmap clip mask into clipping region. 

+ * First, goes through each line and makes boxes by noting the transitions

+ * from 0 to 1 and 1 to 0.

+ * Then it coalesces the current line with the previous if they have boxes

+ * at the same X coordinates.

+ */

+RegionPtr

+fbPixmapToRegion(PixmapPtr pPix)

+{

+    register RegionPtr	pReg;

+    FbBits		*pw, w;

+    register int	ib;

+    int			width, h, base, rx1 = 0, crects;

+    FbBits		*pwLineEnd;

+    int			irectPrevStart, irectLineStart;

+    register BoxPtr	prectO, prectN;

+    BoxPtr		FirstRect, rects, prectLineStart;

+    Bool		fInBox, fSame;

+    register FbBits	mask0 = FB_ALLONES & ~FbScrRight(FB_ALLONES, 1);

+    FbBits		*pwLine;

+    int			nWidth;

+    

+    pReg = REGION_CREATE(pPix->drawable.pScreen, NULL, 1);

+    if(!pReg)

+	return NullRegion;

+    FirstRect = REGION_BOXPTR(pReg);

+    rects = FirstRect;

+

+    fbPrepareAccess(&pPix->drawable);

+

+    pwLine = (FbBits *) pPix->devPrivate.ptr;

+    nWidth = pPix->devKind >> (FB_SHIFT-3);

+

+    width = pPix->drawable.width;

+    pReg->extents.x1 = width - 1;

+    pReg->extents.x2 = 0;

+    irectPrevStart = -1;

+    for(h = 0; h < pPix->drawable.height; h++)

+    {

+	pw = pwLine;

+	pwLine += nWidth;

+	irectLineStart = rects - FirstRect;

+	/* If the Screen left most bit of the word is set, we're starting in

+	 * a box */

+	if(READ(pw) & mask0)

+	{

+	    fInBox = TRUE;

+	    rx1 = 0;

+	}

+	else

+	    fInBox = FALSE;

+	/* Process all words which are fully in the pixmap */

+	pwLineEnd = pw + (width >> FB_SHIFT);

+	for (base = 0; pw < pwLineEnd; base += FB_UNIT)

+	{

+	    w = READ(pw++);

+	    if (fInBox)

+	    {

+		if (!~w)

+		    continue;

+	    }

+	    else

+	    {

+		if (!w)

+		    continue;

+	    }

+	    for(ib = 0; ib < FB_UNIT; ib++)

+	    {

+	        /* If the Screen left most bit of the word is set, we're

+		 * starting a box */

+		if(w & mask0)

+		{

+		    if(!fInBox)

+		    {

+			rx1 = base + ib;

+			/* start new box */

+			fInBox = TRUE;

+		    }

+		}

+		else

+		{

+		    if(fInBox)

+		    {

+			/* end box */

+			ADDRECT(pReg, rects, FirstRect,

+				rx1, h, base + ib, h + 1);

+			fInBox = FALSE;

+		    }

+		}

+		/* Shift the word VISUALLY left one. */

+		w = FbScrLeft(w, 1);

+	    }

+	}

+	if(width & FB_MASK)

+	{

+	    /* Process final partial word on line */

+	    w = READ(pw++);

+	    for(ib = 0; ib < (width & FB_MASK); ib++)

+	    {

+	        /* If the Screen left most bit of the word is set, we're

+		 * starting a box */

+		if(w & mask0)

+		{

+		    if(!fInBox)

+		    {

+			rx1 = base + ib;

+			/* start new box */

+			fInBox = TRUE;

+		    }

+		}

+		else

+		{

+		    if(fInBox)

+		    {

+			/* end box */

+			ADDRECT(pReg, rects, FirstRect,

+				rx1, h, base + ib, h + 1);

+			fInBox = FALSE;

+		    }

+		}

+		/* Shift the word VISUALLY left one. */

+		w = FbScrLeft(w, 1);

+	    }

+	}

+	/* If scanline ended with last bit set, end the box */

+	if(fInBox)

+	{

+	    ADDRECT(pReg, rects, FirstRect,

+		    rx1, h, base + (width & FB_MASK), h + 1);

+	}

+	/* if all rectangles on this line have the same x-coords as

+	 * those on the previous line, then add 1 to all the previous  y2s and 

+	 * throw away all the rectangles from this line 

+	 */

+	fSame = FALSE;

+	if(irectPrevStart != -1)

+	{

+	    crects = irectLineStart - irectPrevStart;

+	    if(crects == ((rects - FirstRect) - irectLineStart))

+	    {

+	        prectO = FirstRect + irectPrevStart;

+	        prectN = prectLineStart = FirstRect + irectLineStart;

+		fSame = TRUE;

+	        while(prectO < prectLineStart)

+		{

+		    if((prectO->x1 != prectN->x1) || (prectO->x2 != prectN->x2))

+		    {

+			  fSame = FALSE;

+			  break;

+		    }

+		    prectO++;

+		    prectN++;

+		}

+		if (fSame)

+		{

+		    prectO = FirstRect + irectPrevStart;

+		    while(prectO < prectLineStart)

+		    {

+			prectO->y2 += 1;

+			prectO++;

+		    }

+		    rects -= crects;

+		    pReg->data->numRects -= crects;

+		}

+	    }

+	}

+	if(!fSame)

+	    irectPrevStart = irectLineStart;

+    }

+    if (!pReg->data->numRects)

+	pReg->extents.x1 = pReg->extents.x2 = 0;

+    else

+    {

+	pReg->extents.y1 = REGION_BOXPTR(pReg)->y1;

+	pReg->extents.y2 = REGION_END(pReg)->y2;

+	if (pReg->data->numRects == 1)

+	{

+	    free(pReg->data);

+	    pReg->data = (RegDataPtr)NULL;

+	}

+    }

+

+    fbFinishAccess(&pPix->drawable);

+#ifdef DEBUG

+    if (!miValidRegion(pReg))

+	FatalError("Assertion failed file %s, line %d: expr\n", __FILE__, __LINE__);

+#endif

+    return(pReg);

+}

+

+#ifdef FB_DEBUG

+

+#include <stdio.h>

+

+static Bool

+fbValidateBits (FbStip *bits, int stride, FbStip data)

+{

+    while (stride--)

+    {

+	if (*bits != data)

+	{

+	    fprintf (stderr, "fbValidateBits failed at 0x%x (is 0x%x want 0x%x)\n",bits, *bits, data);

+	    return FALSE;

+	}

+	bits++;

+    }

+}

+

+void

+fbValidateDrawable (DrawablePtr pDrawable)

+{

+    FbStip	*bits, *first, *last;

+    int		stride, bpp;

+    int		xoff, yoff;

+    int		height;

+    Bool	failed;

+    

+    if (pDrawable->type != DRAWABLE_PIXMAP)

+	pDrawable = (DrawablePtr) fbGetWindowPixmap(pDrawable);

+    fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);

+    first = bits - stride;

+    last = bits + stride * pDrawable->height;

+    if (!fbValidateBits (first, stride, FB_HEAD_BITS) ||

+	!fbValidateBits (last, stride, FB_TAIL_BITS))

+	fbInitializeDrawable(pDrawable);

+    fbFinishAccess (pDrawable);

+}

+

+void

+fbSetBits (FbStip *bits, int stride, FbStip data)

+{

+    while (stride--)

+	*bits++ = data;

+}

+

+void

+fbInitializeDrawable (DrawablePtr pDrawable)

+{

+    FbStip  *bits, *first, *last;

+    int	    stride, bpp;

+    int	    xoff, yoff;

+    

+    fbGetStipDrawable(pDrawable, bits, stride, bpp, xoff, yoff);

+    first = bits - stride;

+    last = bits + stride * pDrawable->height;

+    fbSetBits (first, stride, FB_HEAD_BITS);

+    fbSetBits (last, stride, FB_TAIL_BITS);

+    fbFinishAccess (pDrawable);

+}

+#endif /* FB_DEBUG */