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/*
* 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);
}
}
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