libX11 xserver fontconfig mesa pixman xkbcomp xkeyboard-config git update

23 Mar 2012

1 files changed, 839 insertions, 863 deletions

diff --git a/xorg-server/exa/exa_glyphs.c b/xorg-server/exa/exa_glyphs.c
index 15ef61b1e..2538bce01 100644
--- a/xorg-server/exa/exa_glyphs.c
+++ b/xorg-server/exa/exa_glyphs.c
@@ -1,863 +1,839 @@
-/*

- * Copyright © 2008 Red Hat, Inc.

- * Partly based on code Copyright © 2000 SuSE, Inc.

- *

- * 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 Red Hat not be used in advertising or

- * publicity pertaining to distribution of the software without specific,

- * written prior permission.  Red Hat makes no representations about the

- * suitability of this software for any purpose.  It is provided "as is"

- * without express or implied warranty.

- *

- * Red Hat DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL Red Hat

- * 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.

- *

- * 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 SuSE not be used in advertising or

- * publicity pertaining to distribution of the software without specific,

- * written prior permission.  SuSE makes no representations about the

- * suitability of this software for any purpose.  It is provided "as is"

- * without express or implied warranty.

- *

- * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL

- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE

- * 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.

- *

- * Author: Owen Taylor <otaylor@fishsoup.net>

- * Based on code by: Keith Packard

- */

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <stdlib.h>

-

-#include "exa_priv.h"

-

-#include "mipict.h"

-

-#if DEBUG_GLYPH_CACHE

-#define DBG_GLYPH_CACHE(a) ErrorF a

-#else

-#define DBG_GLYPH_CACHE(a)

-#endif

-

-/* Width of the pixmaps we use for the caches; this should be less than

- * max texture size of the driver; this may need to actually come from

- * the driver.

- */

-#define CACHE_PICTURE_WIDTH 1024

-

-/* Maximum number of glyphs we buffer on the stack before flushing

- * rendering to the mask or destination surface.

- */

-#define GLYPH_BUFFER_SIZE 256

-

-typedef struct {

-    PicturePtr mask;

-    ExaCompositeRectRec rects[GLYPH_BUFFER_SIZE];

-    int count;

-} ExaGlyphBuffer, *ExaGlyphBufferPtr;

-

-typedef enum {

-    ExaGlyphSuccess,    /* Glyph added to render buffer */

-    ExaGlyphFail,       /* out of memory, etc */

-    ExaGlyphNeedFlush,  /* would evict a glyph already in the buffer */

-} ExaGlyphCacheResult;

-

-void

-exaGlyphsInit(ScreenPtr pScreen)

-{

-    ExaScreenPriv(pScreen);

-    int i = 0;

-

-    memset(pExaScr->glyphCaches, 0, sizeof(pExaScr->glyphCaches));

-

-    pExaScr->glyphCaches[i].format = PICT_a8;

-    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 16;

-    i++;

-    pExaScr->glyphCaches[i].format = PICT_a8;

-    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 32;

-    i++;

-    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;

-    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 16;

-    i++;

-    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;

-    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight = 32;

-    i++;

-

-    assert(i == EXA_NUM_GLYPH_CACHES);

-    

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	pExaScr->glyphCaches[i].columns = CACHE_PICTURE_WIDTH / pExaScr->glyphCaches[i].glyphWidth;

-	pExaScr->glyphCaches[i].size = 256;

-	pExaScr->glyphCaches[i].hashSize = 557;

-    }

-}

-

-static void

-exaUnrealizeGlyphCaches(ScreenPtr    pScreen,

-			unsigned int format)

-{

-    ExaScreenPriv(pScreen);

-    int i;

-

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];

-	

-	if (cache->format != format)

-	    continue;

-

-	if (cache->picture) {

-	    FreePicture ((pointer) cache->picture, (XID) 0);

-	    cache->picture = NULL;

-	}

-

-	free(cache->hashEntries);

-	cache->hashEntries = NULL;

-	

-	free(cache->glyphs);

-	cache->glyphs = NULL;

-	cache->glyphCount = 0;

-    }

-}

-

-#define NeedsComponent(f) (PICT_FORMAT_A(f) != 0 && PICT_FORMAT_RGB(f) != 0)

-

-/* All caches for a single format share a single pixmap for glyph storage,

- * allowing mixing glyphs of different sizes without paying a penalty

- * for switching between mask pixmaps. (Note that for a size of font

- * right at the border between two sizes, we might be switching for almost

- * every glyph.)

- *

- * This function allocates the storage pixmap, and then fills in the

- * rest of the allocated structures for all caches with the given format.

- */

-static Bool

-exaRealizeGlyphCaches(ScreenPtr    pScreen,

-		      unsigned int format)

-{

-    ExaScreenPriv(pScreen);

-

-    int depth = PIXMAN_FORMAT_DEPTH(format);

-    PictFormatPtr pPictFormat;

-    PixmapPtr pPixmap;

-    PicturePtr pPicture;

-    CARD32 component_alpha;

-    int height;

-    int i;

-    int	error;

-

-    pPictFormat = PictureMatchFormat(pScreen, depth, format);

-    if (!pPictFormat)

-	return FALSE;

-    

-    /* Compute the total vertical size needed for the format */

-

-    height = 0;

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];

-	int rows;

-

-	if (cache->format != format)

-	    continue;

-

-	cache->yOffset = height;

-

-	rows = (cache->size + cache->columns - 1) / cache->columns;

-	height += rows * cache->glyphHeight;

-    }

-

-    /* Now allocate the pixmap and picture */

-    pPixmap = (*pScreen->CreatePixmap) (pScreen,

-					CACHE_PICTURE_WIDTH,

-					height, depth, 0);

-    if (!pPixmap)

-	return FALSE;

-

-    component_alpha = NeedsComponent(pPictFormat->format);

-    pPicture = CreatePicture(0, &pPixmap->drawable, pPictFormat,

-			     CPComponentAlpha, &component_alpha, serverClient,

-			     &error);

-

-    (*pScreen->DestroyPixmap) (pPixmap); /* picture holds a refcount */

-

-    if (!pPicture)

-	return FALSE;

-

-    /* And store the picture in all the caches for the format */

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];

-	int j;

-

-	if (cache->format != format)

-	    continue;

-

-	cache->picture = pPicture;

-	cache->picture->refcnt++;

-	cache->hashEntries = malloc(sizeof(int) * cache->hashSize);

-	cache->glyphs = malloc(sizeof(ExaCachedGlyphRec) * cache->size);

-	cache->glyphCount = 0;

-

-	if (!cache->hashEntries || !cache->glyphs)

-	    goto bail;

-

-	for (j = 0; j < cache->hashSize; j++)

-	    cache->hashEntries[j] = -1;

-	

-	cache->evictionPosition = rand() % cache->size;

-    }

-

-    /* Each cache references the picture individually */

-    FreePicture ((pointer) pPicture, (XID) 0);

-    return TRUE;

-

-bail:

-    exaUnrealizeGlyphCaches(pScreen, format);

-    return FALSE;

-}

-

-void

-exaGlyphsFini (ScreenPtr pScreen)

-{

-    ExaScreenPriv(pScreen);

-    int i;

-

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];

-

-	if (cache->picture)

-	    exaUnrealizeGlyphCaches(pScreen, cache->format);

-    }

-}

-

-static int

-exaGlyphCacheHashLookup(ExaGlyphCachePtr cache,

-			GlyphPtr         pGlyph)

-{

-    int slot;

-

-    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;

-    

-    while (TRUE) { /* hash table can never be full */

-	int entryPos = cache->hashEntries[slot];

-	if (entryPos == -1)

-	    return -1;

-

-	if (memcmp(pGlyph->sha1, cache->glyphs[entryPos].sha1, sizeof(pGlyph->sha1)) == 0){

-	    return entryPos;

-	}

-	    

-	slot--;

-	if (slot < 0)

-	    slot = cache->hashSize - 1;

-    }

-}

-

-static void

-exaGlyphCacheHashInsert(ExaGlyphCachePtr cache,

-			GlyphPtr         pGlyph,

-			int              pos)

-{

-    int slot;

-

-    memcpy(cache->glyphs[pos].sha1, pGlyph->sha1, sizeof(pGlyph->sha1));

-    

-    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;

-    

-    while (TRUE) { /* hash table can never be full */

-	if (cache->hashEntries[slot] == -1) {

-	    cache->hashEntries[slot] = pos;

-	    return;

-	}

-	    

-	slot--;

-	if (slot < 0)

-	    slot = cache->hashSize - 1;

-    }

-}

-

-static void

-exaGlyphCacheHashRemove(ExaGlyphCachePtr cache,

-			int              pos)

-{

-    int slot;

-    int emptiedSlot = -1;

-

-    slot = (*(CARD32 *) cache->glyphs[pos].sha1) % cache->hashSize;

-

-    while (TRUE) { /* hash table can never be full */

-	int entryPos = cache->hashEntries[slot];

-	

-	if (entryPos == -1)

-	    return;

-

-	if (entryPos == pos) {

-	    cache->hashEntries[slot] = -1;

-	    emptiedSlot = slot;

-	} else if (emptiedSlot != -1) {

-	    /* See if we can move this entry into the emptied slot, we can't

-	     * do that if if entry would have hashed between the current position

-	     * and the emptied slot. (taking wrapping into account). Bad positions

-	     * are:

-	     *

-	     * |   XXXXXXXXXX             |

-	     *     i         j            

-	     *                            

-	     * |XXX                   XXXX|

-	     *     j                  i

-	     *

-	     * i - slot, j - emptiedSlot

-	     *

-	     * (Knuth 6.4R)

-	     */

-	    

-	    int entrySlot = (*(CARD32 *) cache->glyphs[entryPos].sha1) % cache->hashSize;

-

-	    if (!((entrySlot >= slot && entrySlot < emptiedSlot) ||

-		  (emptiedSlot < slot && (entrySlot < emptiedSlot || entrySlot >= slot)))) 

-	    {

-		cache->hashEntries[emptiedSlot] = entryPos;

-		cache->hashEntries[slot] = -1;

-		emptiedSlot = slot;

-	    }

-	}

-	

-	slot--;

-	if (slot < 0)

-	    slot = cache->hashSize - 1;

-    }

-}

-

-#define CACHE_X(pos) (((pos) % cache->columns) * cache->glyphWidth)

-#define CACHE_Y(pos) (cache->yOffset + ((pos) / cache->columns) * cache->glyphHeight)

-

-/* The most efficient thing to way to upload the glyph to the screen

- * is to use the UploadToScreen() driver hook; this allows us to

- * pipeline glyph uploads and to avoid creating gpu backed pixmaps for

- * glyphs that we'll never use again.

- *

- * If we can't do it with UploadToScreen (because the glyph has a gpu copy,

- * etc), we fall back to CompositePicture.

- *

- * We need to damage the cache pixmap manually in either case because the damage

- * layer unwrapped the picture screen before calling exaGlyphs.

- */

-static void

-exaGlyphCacheUploadGlyph(ScreenPtr         pScreen,

-			 ExaGlyphCachePtr  cache,

-			 int               x,

-			 int               y,

-			 GlyphPtr          pGlyph)

-{

-    ExaScreenPriv(pScreen);

-    PicturePtr pGlyphPicture = GlyphPicture(pGlyph)[pScreen->myNum];

-    PixmapPtr pGlyphPixmap = (PixmapPtr)pGlyphPicture->pDrawable;

-    ExaPixmapPriv(pGlyphPixmap);

-    PixmapPtr pCachePixmap = (PixmapPtr)cache->picture->pDrawable;

-

-    if (!pExaScr->info->UploadToScreen || pExaScr->swappedOut || pExaPixmap->accel_blocked)

-	goto composite;

-

-    /* If the glyph pixmap is already uploaded, no point in doing

-     * things this way */

-    if (exaPixmapHasGpuCopy(pGlyphPixmap))

-	goto composite;

-

-    /* UploadToScreen only works if bpp match */

-    if (pGlyphPixmap->drawable.bitsPerPixel != pCachePixmap->drawable.bitsPerPixel)

-	goto composite;

-

-    if (pExaScr->do_migration) {

-	ExaMigrationRec pixmaps[1];

-

-	/* cache pixmap must have a gpu copy. */

-	pixmaps[0].as_dst = TRUE;

-	pixmaps[0].as_src = FALSE;

-	pixmaps[0].pPix = pCachePixmap;

-	pixmaps[0].pReg = NULL;

-	exaDoMigration (pixmaps, 1, TRUE);

-    }

-

-    if (!exaPixmapHasGpuCopy(pCachePixmap))

-	goto composite;

-

-    /* x,y are in pixmap coordinates, no need for cache{X,Y}off */

-    if (pExaScr->info->UploadToScreen(pCachePixmap,

-				      x,

-				      y,

-				      pGlyph->info.width,

-				      pGlyph->info.height,

-				      (char *)pExaPixmap->sys_ptr,

-				      pExaPixmap->sys_pitch))

-	goto damage;

-

-composite:

-    CompositePicture (PictOpSrc,

-		      pGlyphPicture,

-		      None,

-		      cache->picture,

-		      0, 0,

-		      0, 0,

-		      x,

-		      y,

-		      pGlyph->info.width,

-		      pGlyph->info.height);

-

-damage:

-    /* The cache pixmap isn't a window, so no need to offset coordinates. */

-    exaPixmapDirty (pCachePixmap,

-		    x,

-		    y,

-		    x + cache->glyphWidth,

-		    y + cache->glyphHeight);

-}

-

-static ExaGlyphCacheResult

-exaGlyphCacheBufferGlyph(ScreenPtr         pScreen,

-			 ExaGlyphCachePtr  cache,

-			 ExaGlyphBufferPtr buffer,

-			 GlyphPtr          pGlyph,

-			 PicturePtr        pSrc,

-			 PicturePtr        pDst,

-			 INT16             xSrc,

-			 INT16             ySrc,

-			 INT16             xMask,

-			 INT16             yMask,

-			 INT16             xDst,

-			 INT16             yDst)

-{

-    ExaCompositeRectPtr rect;

-    int pos;

-    int x, y;

-    

-    if (buffer->mask && buffer->mask != cache->picture)

-	return ExaGlyphNeedFlush;

-

-    if (!cache->picture) {

-	if (!exaRealizeGlyphCaches(pScreen, cache->format))

-	    return ExaGlyphFail;

-    }

-

-    DBG_GLYPH_CACHE(("(%d,%d,%s): buffering glyph %lx\n",

-		     cache->glyphWidth, cache->glyphHeight, cache->format == PICT_a8 ? "A" : "ARGB",

-		     (long)*(CARD32 *) pGlyph->sha1));

-   

-    pos = exaGlyphCacheHashLookup(cache, pGlyph);

-    if (pos != -1) {

-	DBG_GLYPH_CACHE(("  found existing glyph at %d\n", pos));

-	x = CACHE_X(pos);

-	y = CACHE_Y(pos);

-    } else {

-	if (cache->glyphCount < cache->size) {

-	    /* Space remaining; we fill from the start */

-	    pos = cache->glyphCount;

-	    x = CACHE_X(pos);

-	    y = CACHE_Y(pos);

-	    cache->glyphCount++;

-	    DBG_GLYPH_CACHE(("  storing glyph in free space at %d\n", pos));

-

-	    exaGlyphCacheHashInsert(cache, pGlyph, pos);

-

-	} else {

-	    /* Need to evict an entry. We have to see if any glyphs

-	     * already in the output buffer were at this position in

-	     * the cache

-	     */

-	    pos = cache->evictionPosition;

-	    x = CACHE_X(pos);

-	    y = CACHE_Y(pos);

-	    DBG_GLYPH_CACHE(("  evicting glyph at %d\n", pos));

-	    if (buffer->count) {

-		int i;

-

-		for (i = 0; i < buffer->count; i++) {

-		    if (pSrc ?

-			(buffer->rects[i].xMask == x && buffer->rects[i].yMask == y) :

-			(buffer->rects[i].xSrc == x && buffer->rects[i].ySrc == y)) {

-			DBG_GLYPH_CACHE(("  must flush buffer\n"));

-			return ExaGlyphNeedFlush;

-		    }

-		}

-	    }

-

-	    /* OK, we're all set, swap in the new glyph */

-	    exaGlyphCacheHashRemove(cache, pos);

-	    exaGlyphCacheHashInsert(cache, pGlyph, pos);

-

-	    /* And pick a new eviction position */

-	    cache->evictionPosition = rand() % cache->size;

-	}

-

-	exaGlyphCacheUploadGlyph(pScreen, cache, x, y, pGlyph);

-    }

-

-    buffer->mask = cache->picture;

-	    

-    rect = &buffer->rects[buffer->count];

-

-    if (pSrc)

-    {

-	rect->xSrc = xSrc;

-	rect->ySrc = ySrc;

-	rect->xMask = x;

-	rect->yMask = y;

-    }

-    else

-    {

-	rect->xSrc = x;

-	rect->ySrc = y;

-	rect->xMask = 0;

-	rect->yMask = 0;

-    }

-

-    rect->pDst = pDst;

-    rect->xDst = xDst;

-    rect->yDst = yDst;

-    rect->width = pGlyph->info.width;

-    rect->height = pGlyph->info.height;

-

-    buffer->count++;

-

-    return ExaGlyphSuccess;

-}

-

-#undef CACHE_X

-#undef CACHE_Y

-

-static ExaGlyphCacheResult

-exaBufferGlyph(ScreenPtr         pScreen,

-	       ExaGlyphBufferPtr buffer,

-	       GlyphPtr          pGlyph,

-	       PicturePtr        pSrc,

-	       PicturePtr        pDst,

-	       INT16             xSrc,

-	       INT16             ySrc,

-	       INT16             xMask,

-	       INT16             yMask,

-	       INT16             xDst,

-	       INT16             yDst)

-{

-    ExaScreenPriv(pScreen);

-    unsigned int format = (GlyphPicture(pGlyph)[pScreen->myNum])->format;

-    int width = pGlyph->info.width;

-    int height = pGlyph->info.height;

-    ExaCompositeRectPtr rect;

-    PicturePtr mask;

-    int i;

-

-    if (buffer->count == GLYPH_BUFFER_SIZE)

-	return ExaGlyphNeedFlush;

-

-    if (PICT_FORMAT_BPP(format) == 1)

-	format = PICT_a8;

-    

-    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {

-	ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];

-

-	if (format == cache->format &&

-	    width <= cache->glyphWidth &&

-	    height <= cache->glyphHeight) {

-	    ExaGlyphCacheResult result = exaGlyphCacheBufferGlyph(pScreen,

-								  &pExaScr->glyphCaches[i],

-								  buffer,

-								  pGlyph,

-								  pSrc,

-								  pDst,

-								  xSrc, ySrc,

-								  xMask, yMask,

-								  xDst, yDst);

-	    switch (result) {

-	    case ExaGlyphFail:

-		break;

-	    case ExaGlyphSuccess:

-	    case ExaGlyphNeedFlush:

-		return result;

-	    }

-	}

-    }

-

-    /* Couldn't find the glyph in the cache, use the glyph picture directly */

-

-    mask = GlyphPicture(pGlyph)[pScreen->myNum];

-    if (buffer->mask && buffer->mask != mask)

-	return ExaGlyphNeedFlush;

-

-    buffer->mask = mask;

-

-    rect = &buffer->rects[buffer->count];

-    rect->xSrc = xSrc;

-    rect->ySrc = ySrc;

-    rect->xMask = xMask;

-    rect->yMask = yMask;

-    rect->xDst = xDst;

-    rect->yDst = yDst;

-    rect->width = width;

-    rect->height = height;

-

-    buffer->count++;

-

-    return ExaGlyphSuccess;

-}

-

-static void

-exaGlyphsToMask(PicturePtr        pMask,

-		ExaGlyphBufferPtr buffer)

-{

-    exaCompositeRects(PictOpAdd, buffer->mask, NULL, pMask,

-		      buffer->count, buffer->rects);

-    

-    buffer->count = 0;

-    buffer->mask = NULL;

-}

-

-static void

-exaGlyphsToDst(PicturePtr	 pSrc,

-	       PicturePtr	 pDst,

-	       ExaGlyphBufferPtr buffer)

-{

-    exaCompositeRects(PictOpOver, pSrc, buffer->mask, pDst, buffer->count,

-		      buffer->rects);

-    

-    buffer->count = 0;

-    buffer->mask = NULL;

-}

-

-/* Cut and paste from render/glyph.c - probably should export it instead */

-static void

-GlyphExtents (int		nlist,

-	      GlyphListPtr	list,

-	      GlyphPtr	       *glyphs,

-	      BoxPtr		extents)

-{

-    int		x1, x2, y1, y2;

-    int		n;

-    GlyphPtr	glyph;

-    int		x, y;

-    

-    x = 0;

-    y = 0;

-    extents->x1 = MAXSHORT;

-    extents->x2 = MINSHORT;

-    extents->y1 = MAXSHORT;

-    extents->y2 = MINSHORT;

-    while (nlist--)

-    {

-	x += list->xOff;

-	y += list->yOff;

-	n = list->len;

-	list++;

-	while (n--)

-	{

-	    glyph = *glyphs++;

-	    x1 = x - glyph->info.x;

-	    if (x1 < MINSHORT)

-		x1 = MINSHORT;

-	    y1 = y - glyph->info.y;

-	    if (y1 < MINSHORT)

-		y1 = MINSHORT;

-	    x2 = x1 + glyph->info.width;

-	    if (x2 > MAXSHORT)

-		x2 = MAXSHORT;

-	    y2 = y1 + glyph->info.height;

-	    if (y2 > MAXSHORT)

-		y2 = MAXSHORT;

-	    if (x1 < extents->x1)

-		extents->x1 = x1;

-	    if (x2 > extents->x2)

-		extents->x2 = x2;

-	    if (y1 < extents->y1)

-		extents->y1 = y1;

-	    if (y2 > extents->y2)

-		extents->y2 = y2;

-	    x += glyph->info.xOff;

-	    y += glyph->info.yOff;

-	}

-    }

-}

-

-void

-exaGlyphs (CARD8 	 op,

-	   PicturePtr	 pSrc,

-	   PicturePtr	 pDst,

-	   PictFormatPtr maskFormat,

-	   INT16	 xSrc,

-	   INT16	 ySrc,

-	   int		 nlist,

-	   GlyphListPtr	 list,

-	   GlyphPtr	*glyphs)

-{

-    PixmapPtr   pMaskPixmap = 0;

-    PicturePtr  pMask = NULL;

-    ScreenPtr   pScreen = pDst->pDrawable->pScreen;

-    int		width = 0, height = 0;

-    int		x, y;

-    int		first_xOff = list->xOff, first_yOff = list->yOff;

-    int		n;

-    GlyphPtr	glyph;

-    int		error;

-    BoxRec	extents = {0, 0, 0, 0};

-    CARD32	component_alpha;

-    ExaGlyphBuffer buffer;

-

-    if (maskFormat)

-    {

-	ExaScreenPriv(pScreen);

-	GCPtr	    pGC;

-	xRectangle  rect;

-

-	GlyphExtents (nlist, list, glyphs, &extents);

-

-	if (extents.x2 <= extents.x1 || extents.y2 <= extents.y1)

-	    return;

-	width = extents.x2 - extents.x1;

-	height = extents.y2 - extents.y1;

-

-	if (maskFormat->depth == 1) {

-	    PictFormatPtr a8Format = PictureMatchFormat (pScreen, 8, PICT_a8);

-

-	    if (a8Format)

-		maskFormat = a8Format;

-	}

-

-	pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,

-						maskFormat->depth,

-						CREATE_PIXMAP_USAGE_SCRATCH);

-	if (!pMaskPixmap)

-	    return;

-	component_alpha = NeedsComponent(maskFormat->format);

-	pMask = CreatePicture (0, &pMaskPixmap->drawable,

-			       maskFormat, CPComponentAlpha, &component_alpha,

-			       serverClient, &error);

-	if (!pMask ||

-	    (!component_alpha && pExaScr->info->CheckComposite &&

-	     !(*pExaScr->info->CheckComposite) (PictOpAdd, pSrc, NULL, pMask)))

-	{

-	    PictFormatPtr argbFormat;

-

-	    (*pScreen->DestroyPixmap) (pMaskPixmap);

-

-	    if (!pMask)

-		return;

-

-	    /* The driver can't seem to composite to a8, let's try argb (but

-	     * without component-alpha) */

-	    FreePicture ((pointer) pMask, (XID) 0);

-

-	    argbFormat = PictureMatchFormat (pScreen, 32, PICT_a8r8g8b8);

-

-	    if (argbFormat)

-		maskFormat = argbFormat;

-	    

-	    pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,

-						    maskFormat->depth,

-						    CREATE_PIXMAP_USAGE_SCRATCH);

-	    if (!pMaskPixmap)

-		return;

-

-	    pMask = CreatePicture (0, &pMaskPixmap->drawable, maskFormat, 0, 0,

-				   serverClient, &error);

-	    if (!pMask) {

-		(*pScreen->DestroyPixmap) (pMaskPixmap);

-		return;

-	    }

-	}

-	pGC = GetScratchGC (pMaskPixmap->drawable.depth, pScreen);

-	ValidateGC (&pMaskPixmap->drawable, pGC);

-	rect.x = 0;

-	rect.y = 0;

-	rect.width = width;

-	rect.height = height;

-	(*pGC->ops->PolyFillRect) (&pMaskPixmap->drawable, pGC, 1, &rect);

-	FreeScratchGC (pGC);

-	x = -extents.x1;

-	y = -extents.y1;

-    }

-    else

-    {

-	x = 0;

-	y = 0;

-    }

-    buffer.count = 0;

-    buffer.mask = NULL;

-    while (nlist--)

-    {

-	x += list->xOff;

-	y += list->yOff;

-	n = list->len;

-	while (n--)

-	{

-	    glyph = *glyphs++;

-

-	    if (glyph->info.width > 0 && glyph->info.height > 0)

-	    {

-		/* pGlyph->info.{x,y} compensate for empty space in the glyph. */

-		if (maskFormat)

-		{

-		    if (exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,

-				       0, 0, 0, 0, x - glyph->info.x, y - glyph->info.y) == ExaGlyphNeedFlush)

-		    {

-			exaGlyphsToMask(pMask, &buffer);

-			exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,

-				       0, 0, 0, 0, x - glyph->info.x, y - glyph->info.y);

-		    }

-		}

-		else

-		{

-		    if (exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,

-				       xSrc + (x - glyph->info.x) - first_xOff, ySrc + (y - glyph->info.y) - first_yOff,

-				       0, 0, x - glyph->info.x, y - glyph->info.y)

-			== ExaGlyphNeedFlush)

-		    {

-			exaGlyphsToDst(pSrc, pDst, &buffer);

-			exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,

-				       xSrc + (x - glyph->info.x) - first_xOff, ySrc + (y - glyph->info.y) - first_yOff,

-				       0, 0, x - glyph->info.x, y - glyph->info.y);

-		    }

-		}

-	    }

-

-	    x += glyph->info.xOff;

-	    y += glyph->info.yOff;

-	}

-	list++;

-    }

-    

-    if (buffer.count) {

-        if (maskFormat)

-	    exaGlyphsToMask(pMask, &buffer);

-        else

-	    exaGlyphsToDst(pSrc, pDst, &buffer);

-    }

-

-    if (maskFormat)

-    {

-	x = extents.x1;

-	y = extents.y1;

-	CompositePicture (op,

-			  pSrc,

-			  pMask,

-			  pDst,

-			  xSrc + x - first_xOff,

-			  ySrc + y - first_yOff,

-			  0, 0,

-			  x, y,

-			  width, height);

-	FreePicture ((pointer) pMask, (XID) 0);

-	(*pScreen->DestroyPixmap) (pMaskPixmap);

-    }

-}

+/*
+ * Copyright © 2008 Red Hat, Inc.
+ * Partly based on code Copyright © 2000 SuSE, Inc.
+ *
+ * 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 Red Hat not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  Red Hat makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * Red Hat DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL Red Hat
+ * 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.
+ *
+ * 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 SuSE not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  SuSE makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as is"
+ * without express or implied warranty.
+ *
+ * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
+ * 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.
+ *
+ * Author: Owen Taylor <otaylor@fishsoup.net>
+ * Based on code by: Keith Packard
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <stdlib.h>
+
+#include "exa_priv.h"
+
+#include "mipict.h"
+
+#if DEBUG_GLYPH_CACHE
+#define DBG_GLYPH_CACHE(a) ErrorF a
+#else
+#define DBG_GLYPH_CACHE(a)
+#endif
+
+/* Width of the pixmaps we use for the caches; this should be less than
+ * max texture size of the driver; this may need to actually come from
+ * the driver.
+ */
+#define CACHE_PICTURE_WIDTH 1024
+
+/* Maximum number of glyphs we buffer on the stack before flushing
+ * rendering to the mask or destination surface.
+ */
+#define GLYPH_BUFFER_SIZE 256
+
+typedef struct {
+    PicturePtr mask;
+    ExaCompositeRectRec rects[GLYPH_BUFFER_SIZE];
+    int count;
+} ExaGlyphBuffer, *ExaGlyphBufferPtr;
+
+typedef enum {
+    ExaGlyphSuccess,            /* Glyph added to render buffer */
+    ExaGlyphFail,               /* out of memory, etc */
+    ExaGlyphNeedFlush,          /* would evict a glyph already in the buffer */
+} ExaGlyphCacheResult;
+
+void
+exaGlyphsInit(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    int i = 0;
+
+    memset(pExaScr->glyphCaches, 0, sizeof(pExaScr->glyphCaches));
+
+    pExaScr->glyphCaches[i].format = PICT_a8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight =
+        16;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight =
+        32;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight =
+        16;
+    i++;
+    pExaScr->glyphCaches[i].format = PICT_a8r8g8b8;
+    pExaScr->glyphCaches[i].glyphWidth = pExaScr->glyphCaches[i].glyphHeight =
+        32;
+    i++;
+
+    assert(i == EXA_NUM_GLYPH_CACHES);
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        pExaScr->glyphCaches[i].columns =
+            CACHE_PICTURE_WIDTH / pExaScr->glyphCaches[i].glyphWidth;
+        pExaScr->glyphCaches[i].size = 256;
+        pExaScr->glyphCaches[i].hashSize = 557;
+    }
+}
+
+static void
+exaUnrealizeGlyphCaches(ScreenPtr pScreen, unsigned int format)
+{
+    ExaScreenPriv(pScreen);
+    int i;
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+
+        if (cache->format != format)
+            continue;
+
+        if (cache->picture) {
+            FreePicture((pointer) cache->picture, (XID) 0);
+            cache->picture = NULL;
+        }
+
+        free(cache->hashEntries);
+        cache->hashEntries = NULL;
+
+        free(cache->glyphs);
+        cache->glyphs = NULL;
+        cache->glyphCount = 0;
+    }
+}
+
+#define NeedsComponent(f) (PICT_FORMAT_A(f) != 0 && PICT_FORMAT_RGB(f) != 0)
+
+/* All caches for a single format share a single pixmap for glyph storage,
+ * allowing mixing glyphs of different sizes without paying a penalty
+ * for switching between mask pixmaps. (Note that for a size of font
+ * right at the border between two sizes, we might be switching for almost
+ * every glyph.)
+ *
+ * This function allocates the storage pixmap, and then fills in the
+ * rest of the allocated structures for all caches with the given format.
+ */
+static Bool
+exaRealizeGlyphCaches(ScreenPtr pScreen, unsigned int format)
+{
+    ExaScreenPriv(pScreen);
+
+    int depth = PIXMAN_FORMAT_DEPTH(format);
+    PictFormatPtr pPictFormat;
+    PixmapPtr pPixmap;
+    PicturePtr pPicture;
+    CARD32 component_alpha;
+    int height;
+    int i;
+    int error;
+
+    pPictFormat = PictureMatchFormat(pScreen, depth, format);
+    if (!pPictFormat)
+        return FALSE;
+
+    /* Compute the total vertical size needed for the format */
+
+    height = 0;
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+        int rows;
+
+        if (cache->format != format)
+            continue;
+
+        cache->yOffset = height;
+
+        rows = (cache->size + cache->columns - 1) / cache->columns;
+        height += rows * cache->glyphHeight;
+    }
+
+    /* Now allocate the pixmap and picture */
+    pPixmap = (*pScreen->CreatePixmap) (pScreen,
+                                        CACHE_PICTURE_WIDTH, height, depth, 0);
+    if (!pPixmap)
+        return FALSE;
+
+    component_alpha = NeedsComponent(pPictFormat->format);
+    pPicture = CreatePicture(0, &pPixmap->drawable, pPictFormat,
+                             CPComponentAlpha, &component_alpha, serverClient,
+                             &error);
+
+    (*pScreen->DestroyPixmap) (pPixmap);        /* picture holds a refcount */
+
+    if (!pPicture)
+        return FALSE;
+
+    /* And store the picture in all the caches for the format */
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+        int j;
+
+        if (cache->format != format)
+            continue;
+
+        cache->picture = pPicture;
+        cache->picture->refcnt++;
+        cache->hashEntries = malloc(sizeof(int) * cache->hashSize);
+        cache->glyphs = malloc(sizeof(ExaCachedGlyphRec) * cache->size);
+        cache->glyphCount = 0;
+
+        if (!cache->hashEntries || !cache->glyphs)
+            goto bail;
+
+        for (j = 0; j < cache->hashSize; j++)
+            cache->hashEntries[j] = -1;
+
+        cache->evictionPosition = rand() % cache->size;
+    }
+
+    /* Each cache references the picture individually */
+    FreePicture((pointer) pPicture, (XID) 0);
+    return TRUE;
+
+ bail:
+    exaUnrealizeGlyphCaches(pScreen, format);
+    return FALSE;
+}
+
+void
+exaGlyphsFini(ScreenPtr pScreen)
+{
+    ExaScreenPriv(pScreen);
+    int i;
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+
+        if (cache->picture)
+            exaUnrealizeGlyphCaches(pScreen, cache->format);
+    }
+}
+
+static int
+exaGlyphCacheHashLookup(ExaGlyphCachePtr cache, GlyphPtr pGlyph)
+{
+    int slot;
+
+    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;
+
+    while (TRUE) {              /* hash table can never be full */
+        int entryPos = cache->hashEntries[slot];
+
+        if (entryPos == -1)
+            return -1;
+
+        if (memcmp
+            (pGlyph->sha1, cache->glyphs[entryPos].sha1,
+             sizeof(pGlyph->sha1)) == 0) {
+            return entryPos;
+        }
+
+        slot--;
+        if (slot < 0)
+            slot = cache->hashSize - 1;
+    }
+}
+
+static void
+exaGlyphCacheHashInsert(ExaGlyphCachePtr cache, GlyphPtr pGlyph, int pos)
+{
+    int slot;
+
+    memcpy(cache->glyphs[pos].sha1, pGlyph->sha1, sizeof(pGlyph->sha1));
+
+    slot = (*(CARD32 *) pGlyph->sha1) % cache->hashSize;
+
+    while (TRUE) {              /* hash table can never be full */
+        if (cache->hashEntries[slot] == -1) {
+            cache->hashEntries[slot] = pos;
+            return;
+        }
+
+        slot--;
+        if (slot < 0)
+            slot = cache->hashSize - 1;
+    }
+}
+
+static void
+exaGlyphCacheHashRemove(ExaGlyphCachePtr cache, int pos)
+{
+    int slot;
+    int emptiedSlot = -1;
+
+    slot = (*(CARD32 *) cache->glyphs[pos].sha1) % cache->hashSize;
+
+    while (TRUE) {              /* hash table can never be full */
+        int entryPos = cache->hashEntries[slot];
+
+        if (entryPos == -1)
+            return;
+
+        if (entryPos == pos) {
+            cache->hashEntries[slot] = -1;
+            emptiedSlot = slot;
+        }
+        else if (emptiedSlot != -1) {
+            /* See if we can move this entry into the emptied slot, we can't
+             * do that if if entry would have hashed between the current position
+             * and the emptied slot. (taking wrapping into account). Bad positions
+             * are:
+             *
+             * |   XXXXXXXXXX             |
+             *     i         j            
+             *                            
+             * |XXX                   XXXX|
+             *     j                  i
+             *
+             * i - slot, j - emptiedSlot
+             *
+             * (Knuth 6.4R)
+             */
+
+            int entrySlot =
+                (*(CARD32 *) cache->glyphs[entryPos].sha1) % cache->hashSize;
+
+            if (!((entrySlot >= slot && entrySlot < emptiedSlot) ||
+                  (emptiedSlot < slot &&
+                   (entrySlot < emptiedSlot || entrySlot >= slot)))) {
+                cache->hashEntries[emptiedSlot] = entryPos;
+                cache->hashEntries[slot] = -1;
+                emptiedSlot = slot;
+            }
+        }
+
+        slot--;
+        if (slot < 0)
+            slot = cache->hashSize - 1;
+    }
+}
+
+#define CACHE_X(pos) (((pos) % cache->columns) * cache->glyphWidth)
+#define CACHE_Y(pos) (cache->yOffset + ((pos) / cache->columns) * cache->glyphHeight)
+
+/* The most efficient thing to way to upload the glyph to the screen
+ * is to use the UploadToScreen() driver hook; this allows us to
+ * pipeline glyph uploads and to avoid creating gpu backed pixmaps for
+ * glyphs that we'll never use again.
+ *
+ * If we can't do it with UploadToScreen (because the glyph has a gpu copy,
+ * etc), we fall back to CompositePicture.
+ *
+ * We need to damage the cache pixmap manually in either case because the damage
+ * layer unwrapped the picture screen before calling exaGlyphs.
+ */
+static void
+exaGlyphCacheUploadGlyph(ScreenPtr pScreen,
+                         ExaGlyphCachePtr cache, int x, int y, GlyphPtr pGlyph)
+{
+    ExaScreenPriv(pScreen);
+    PicturePtr pGlyphPicture = GlyphPicture(pGlyph)[pScreen->myNum];
+    PixmapPtr pGlyphPixmap = (PixmapPtr) pGlyphPicture->pDrawable;
+
+    ExaPixmapPriv(pGlyphPixmap);
+    PixmapPtr pCachePixmap = (PixmapPtr) cache->picture->pDrawable;
+
+    if (!pExaScr->info->UploadToScreen || pExaScr->swappedOut ||
+        pExaPixmap->accel_blocked)
+        goto composite;
+
+    /* If the glyph pixmap is already uploaded, no point in doing
+     * things this way */
+    if (exaPixmapHasGpuCopy(pGlyphPixmap))
+        goto composite;
+
+    /* UploadToScreen only works if bpp match */
+    if (pGlyphPixmap->drawable.bitsPerPixel !=
+        pCachePixmap->drawable.bitsPerPixel)
+        goto composite;
+
+    if (pExaScr->do_migration) {
+        ExaMigrationRec pixmaps[1];
+
+        /* cache pixmap must have a gpu copy. */
+        pixmaps[0].as_dst = TRUE;
+        pixmaps[0].as_src = FALSE;
+        pixmaps[0].pPix = pCachePixmap;
+        pixmaps[0].pReg = NULL;
+        exaDoMigration(pixmaps, 1, TRUE);
+    }
+
+    if (!exaPixmapHasGpuCopy(pCachePixmap))
+        goto composite;
+
+    /* x,y are in pixmap coordinates, no need for cache{X,Y}off */
+    if (pExaScr->info->UploadToScreen(pCachePixmap,
+                                      x,
+                                      y,
+                                      pGlyph->info.width,
+                                      pGlyph->info.height,
+                                      (char *) pExaPixmap->sys_ptr,
+                                      pExaPixmap->sys_pitch))
+        goto damage;
+
+ composite:
+    CompositePicture(PictOpSrc,
+                     pGlyphPicture,
+                     None,
+                     cache->picture,
+                     0, 0, 0, 0, x, y, pGlyph->info.width, pGlyph->info.height);
+
+ damage:
+    /* The cache pixmap isn't a window, so no need to offset coordinates. */
+    exaPixmapDirty(pCachePixmap,
+                   x, y, x + cache->glyphWidth, y + cache->glyphHeight);
+}
+
+static ExaGlyphCacheResult
+exaGlyphCacheBufferGlyph(ScreenPtr pScreen,
+                         ExaGlyphCachePtr cache,
+                         ExaGlyphBufferPtr buffer,
+                         GlyphPtr pGlyph,
+                         PicturePtr pSrc,
+                         PicturePtr pDst,
+                         INT16 xSrc,
+                         INT16 ySrc,
+                         INT16 xMask, INT16 yMask, INT16 xDst, INT16 yDst)
+{
+    ExaCompositeRectPtr rect;
+    int pos;
+    int x, y;
+
+    if (buffer->mask && buffer->mask != cache->picture)
+        return ExaGlyphNeedFlush;
+
+    if (!cache->picture) {
+        if (!exaRealizeGlyphCaches(pScreen, cache->format))
+            return ExaGlyphFail;
+    }
+
+    DBG_GLYPH_CACHE(("(%d,%d,%s): buffering glyph %lx\n",
+                     cache->glyphWidth, cache->glyphHeight,
+                     cache->format == PICT_a8 ? "A" : "ARGB",
+                     (long) *(CARD32 *) pGlyph->sha1));
+
+    pos = exaGlyphCacheHashLookup(cache, pGlyph);
+    if (pos != -1) {
+        DBG_GLYPH_CACHE(("  found existing glyph at %d\n", pos));
+        x = CACHE_X(pos);
+        y = CACHE_Y(pos);
+    }
+    else {
+        if (cache->glyphCount < cache->size) {
+            /* Space remaining; we fill from the start */
+            pos = cache->glyphCount;
+            x = CACHE_X(pos);
+            y = CACHE_Y(pos);
+            cache->glyphCount++;
+            DBG_GLYPH_CACHE(("  storing glyph in free space at %d\n", pos));
+
+            exaGlyphCacheHashInsert(cache, pGlyph, pos);
+
+        }
+        else {
+            /* Need to evict an entry. We have to see if any glyphs
+             * already in the output buffer were at this position in
+             * the cache
+             */
+            pos = cache->evictionPosition;
+            x = CACHE_X(pos);
+            y = CACHE_Y(pos);
+            DBG_GLYPH_CACHE(("  evicting glyph at %d\n", pos));
+            if (buffer->count) {
+                int i;
+
+                for (i = 0; i < buffer->count; i++) {
+                    if (pSrc ?
+                        (buffer->rects[i].xMask == x &&
+                         buffer->rects[i].yMask ==
+                         y) : (buffer->rects[i].xSrc == x &&
+                               buffer->rects[i].ySrc == y)) {
+                        DBG_GLYPH_CACHE(("  must flush buffer\n"));
+                        return ExaGlyphNeedFlush;
+                    }
+                }
+            }
+
+            /* OK, we're all set, swap in the new glyph */
+            exaGlyphCacheHashRemove(cache, pos);
+            exaGlyphCacheHashInsert(cache, pGlyph, pos);
+
+            /* And pick a new eviction position */
+            cache->evictionPosition = rand() % cache->size;
+        }
+
+        exaGlyphCacheUploadGlyph(pScreen, cache, x, y, pGlyph);
+    }
+
+    buffer->mask = cache->picture;
+
+    rect = &buffer->rects[buffer->count];
+
+    if (pSrc) {
+        rect->xSrc = xSrc;
+        rect->ySrc = ySrc;
+        rect->xMask = x;
+        rect->yMask = y;
+    }
+    else {
+        rect->xSrc = x;
+        rect->ySrc = y;
+        rect->xMask = 0;
+        rect->yMask = 0;
+    }
+
+    rect->pDst = pDst;
+    rect->xDst = xDst;
+    rect->yDst = yDst;
+    rect->width = pGlyph->info.width;
+    rect->height = pGlyph->info.height;
+
+    buffer->count++;
+
+    return ExaGlyphSuccess;
+}
+
+#undef CACHE_X
+#undef CACHE_Y
+
+static ExaGlyphCacheResult
+exaBufferGlyph(ScreenPtr pScreen,
+               ExaGlyphBufferPtr buffer,
+               GlyphPtr pGlyph,
+               PicturePtr pSrc,
+               PicturePtr pDst,
+               INT16 xSrc,
+               INT16 ySrc, INT16 xMask, INT16 yMask, INT16 xDst, INT16 yDst)
+{
+    ExaScreenPriv(pScreen);
+    unsigned int format = (GlyphPicture(pGlyph)[pScreen->myNum])->format;
+    int width = pGlyph->info.width;
+    int height = pGlyph->info.height;
+    ExaCompositeRectPtr rect;
+    PicturePtr mask;
+    int i;
+
+    if (buffer->count == GLYPH_BUFFER_SIZE)
+        return ExaGlyphNeedFlush;
+
+    if (PICT_FORMAT_BPP(format) == 1)
+        format = PICT_a8;
+
+    for (i = 0; i < EXA_NUM_GLYPH_CACHES; i++) {
+        ExaGlyphCachePtr cache = &pExaScr->glyphCaches[i];
+
+        if (format == cache->format &&
+            width <= cache->glyphWidth && height <= cache->glyphHeight) {
+            ExaGlyphCacheResult result = exaGlyphCacheBufferGlyph(pScreen,
+                                                                  &pExaScr->
+                                                                  glyphCaches
+                                                                  [i],
+                                                                  buffer,
+                                                                  pGlyph,
+                                                                  pSrc,
+                                                                  pDst,
+                                                                  xSrc, ySrc,
+                                                                  xMask, yMask,
+                                                                  xDst, yDst);
+
+            switch (result) {
+            case ExaGlyphFail:
+                break;
+            case ExaGlyphSuccess:
+            case ExaGlyphNeedFlush:
+                return result;
+            }
+        }
+    }
+
+    /* Couldn't find the glyph in the cache, use the glyph picture directly */
+
+    mask = GlyphPicture(pGlyph)[pScreen->myNum];
+    if (buffer->mask && buffer->mask != mask)
+        return ExaGlyphNeedFlush;
+
+    buffer->mask = mask;
+
+    rect = &buffer->rects[buffer->count];
+    rect->xSrc = xSrc;
+    rect->ySrc = ySrc;
+    rect->xMask = xMask;
+    rect->yMask = yMask;
+    rect->xDst = xDst;
+    rect->yDst = yDst;
+    rect->width = width;
+    rect->height = height;
+
+    buffer->count++;
+
+    return ExaGlyphSuccess;
+}
+
+static void
+exaGlyphsToMask(PicturePtr pMask, ExaGlyphBufferPtr buffer)
+{
+    exaCompositeRects(PictOpAdd, buffer->mask, NULL, pMask,
+                      buffer->count, buffer->rects);
+
+    buffer->count = 0;
+    buffer->mask = NULL;
+}
+
+static void
+exaGlyphsToDst(PicturePtr pSrc, PicturePtr pDst, ExaGlyphBufferPtr buffer)
+{
+    exaCompositeRects(PictOpOver, pSrc, buffer->mask, pDst, buffer->count,
+                      buffer->rects);
+
+    buffer->count = 0;
+    buffer->mask = NULL;
+}
+
+/* Cut and paste from render/glyph.c - probably should export it instead */
+static void
+GlyphExtents(int nlist, GlyphListPtr list, GlyphPtr * glyphs, BoxPtr extents)
+{
+    int x1, x2, y1, y2;
+    int n;
+    GlyphPtr glyph;
+    int x, y;
+
+    x = 0;
+    y = 0;
+    extents->x1 = MAXSHORT;
+    extents->x2 = MINSHORT;
+    extents->y1 = MAXSHORT;
+    extents->y2 = MINSHORT;
+    while (nlist--) {
+        x += list->xOff;
+        y += list->yOff;
+        n = list->len;
+        list++;
+        while (n--) {
+            glyph = *glyphs++;
+            x1 = x - glyph->info.x;
+            if (x1 < MINSHORT)
+                x1 = MINSHORT;
+            y1 = y - glyph->info.y;
+            if (y1 < MINSHORT)
+                y1 = MINSHORT;
+            x2 = x1 + glyph->info.width;
+            if (x2 > MAXSHORT)
+                x2 = MAXSHORT;
+            y2 = y1 + glyph->info.height;
+            if (y2 > MAXSHORT)
+                y2 = MAXSHORT;
+            if (x1 < extents->x1)
+                extents->x1 = x1;
+            if (x2 > extents->x2)
+                extents->x2 = x2;
+            if (y1 < extents->y1)
+                extents->y1 = y1;
+            if (y2 > extents->y2)
+                extents->y2 = y2;
+            x += glyph->info.xOff;
+            y += glyph->info.yOff;
+        }
+    }
+}
+
+void
+exaGlyphs(CARD8 op,
+          PicturePtr pSrc,
+          PicturePtr pDst,
+          PictFormatPtr maskFormat,
+          INT16 xSrc,
+          INT16 ySrc, int nlist, GlyphListPtr list, GlyphPtr * glyphs)
+{
+    PixmapPtr pMaskPixmap = 0;
+    PicturePtr pMask = NULL;
+    ScreenPtr pScreen = pDst->pDrawable->pScreen;
+    int width = 0, height = 0;
+    int x, y;
+    int first_xOff = list->xOff, first_yOff = list->yOff;
+    int n;
+    GlyphPtr glyph;
+    int error;
+    BoxRec extents = { 0, 0, 0, 0 };
+    CARD32 component_alpha;
+    ExaGlyphBuffer buffer;
+
+    if (maskFormat) {
+        ExaScreenPriv(pScreen);
+        GCPtr pGC;
+        xRectangle rect;
+
+        GlyphExtents(nlist, list, glyphs, &extents);
+
+        if (extents.x2 <= extents.x1 || extents.y2 <= extents.y1)
+            return;
+        width = extents.x2 - extents.x1;
+        height = extents.y2 - extents.y1;
+
+        if (maskFormat->depth == 1) {
+            PictFormatPtr a8Format = PictureMatchFormat(pScreen, 8, PICT_a8);
+
+            if (a8Format)
+                maskFormat = a8Format;
+        }
+
+        pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+                                                maskFormat->depth,
+                                                CREATE_PIXMAP_USAGE_SCRATCH);
+        if (!pMaskPixmap)
+            return;
+        component_alpha = NeedsComponent(maskFormat->format);
+        pMask = CreatePicture(0, &pMaskPixmap->drawable,
+                              maskFormat, CPComponentAlpha, &component_alpha,
+                              serverClient, &error);
+        if (!pMask ||
+            (!component_alpha && pExaScr->info->CheckComposite &&
+             !(*pExaScr->info->CheckComposite) (PictOpAdd, pSrc, NULL, pMask)))
+        {
+            PictFormatPtr argbFormat;
+
+            (*pScreen->DestroyPixmap) (pMaskPixmap);
+
+            if (!pMask)
+                return;
+
+            /* The driver can't seem to composite to a8, let's try argb (but
+             * without component-alpha) */
+            FreePicture((pointer) pMask, (XID) 0);
+
+            argbFormat = PictureMatchFormat(pScreen, 32, PICT_a8r8g8b8);
+
+            if (argbFormat)
+                maskFormat = argbFormat;
+
+            pMaskPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
+                                                    maskFormat->depth,
+                                                    CREATE_PIXMAP_USAGE_SCRATCH);
+            if (!pMaskPixmap)
+                return;
+
+            pMask = CreatePicture(0, &pMaskPixmap->drawable, maskFormat, 0, 0,
+                                  serverClient, &error);
+            if (!pMask) {
+                (*pScreen->DestroyPixmap) (pMaskPixmap);
+                return;
+            }
+        }
+        pGC = GetScratchGC(pMaskPixmap->drawable.depth, pScreen);
+        ValidateGC(&pMaskPixmap->drawable, pGC);
+        rect.x = 0;
+        rect.y = 0;
+        rect.width = width;
+        rect.height = height;
+        (*pGC->ops->PolyFillRect) (&pMaskPixmap->drawable, pGC, 1, &rect);
+        FreeScratchGC(pGC);
+        x = -extents.x1;
+        y = -extents.y1;
+    }
+    else {
+        x = 0;
+        y = 0;
+    }
+    buffer.count = 0;
+    buffer.mask = NULL;
+    while (nlist--) {
+        x += list->xOff;
+        y += list->yOff;
+        n = list->len;
+        while (n--) {
+            glyph = *glyphs++;
+
+            if (glyph->info.width > 0 && glyph->info.height > 0) {
+                /* pGlyph->info.{x,y} compensate for empty space in the glyph. */
+                if (maskFormat) {
+                    if (exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,
+                                       0, 0, 0, 0, x - glyph->info.x,
+                                       y - glyph->info.y) ==
+                        ExaGlyphNeedFlush) {
+                        exaGlyphsToMask(pMask, &buffer);
+                        exaBufferGlyph(pScreen, &buffer, glyph, NULL, pMask,
+                                       0, 0, 0, 0, x - glyph->info.x,
+                                       y - glyph->info.y);
+                    }
+                }
+                else {
+                    if (exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,
+                                       xSrc + (x - glyph->info.x) - first_xOff,
+                                       ySrc + (y - glyph->info.y) - first_yOff,
+                                       0, 0, x - glyph->info.x,
+                                       y - glyph->info.y)
+                        == ExaGlyphNeedFlush) {
+                        exaGlyphsToDst(pSrc, pDst, &buffer);
+                        exaBufferGlyph(pScreen, &buffer, glyph, pSrc, pDst,
+                                       xSrc + (x - glyph->info.x) - first_xOff,
+                                       ySrc + (y - glyph->info.y) - first_yOff,
+                                       0, 0, x - glyph->info.x,
+                                       y - glyph->info.y);
+                    }
+                }
+            }
+
+            x += glyph->info.xOff;
+            y += glyph->info.yOff;
+        }
+        list++;
+    }
+
+    if (buffer.count) {
+        if (maskFormat)
+            exaGlyphsToMask(pMask, &buffer);
+        else
+            exaGlyphsToDst(pSrc, pDst, &buffer);
+    }
+
+    if (maskFormat) {
+        x = extents.x1;
+        y = extents.y1;
+        CompositePicture(op,
+                         pSrc,
+                         pMask,
+                         pDst,
+                         xSrc + x - first_xOff,
+                         ySrc + y - first_yOff, 0, 0, x, y, width, height);
+        FreePicture((pointer) pMask, (XID) 0);
+        (*pScreen->DestroyPixmap) (pMaskPixmap);
+    }
+}