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diff --git a/exa/exa_glyphs.c b/exa/exa_glyphs.c
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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 source;
+ 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;
+ }
+
+ if (cache->hashEntries) {
+ xfree(cache->hashEntries);
+ cache->hashEntries = NULL;
+ }
+
+ if (cache->glyphs) {
+ xfree(cache->glyphs);
+ cache->glyphs = NULL;
+ }
+ cache->glyphCount = 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 source 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;
+ 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;
+
+ pPicture = CreatePicture(0, &pPixmap->drawable, pPictFormat,
+ 0, 0, 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 = xalloc(sizeof(int) * cache->hashSize);
+ cache->glyphs = xalloc(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 offscreen pixmaps for
+ * glyphs that we'll never use again.
+ */
+static Bool
+exaGlyphCacheUploadGlyph(ScreenPtr pScreen,
+ ExaGlyphCachePtr cache,
+ int pos,
+ GlyphPtr pGlyph)
+{
+ ExaScreenPriv(pScreen);
+ PicturePtr pGlyphPicture = GlyphPicture(pGlyph)[pScreen->myNum];
+ PixmapPtr pGlyphPixmap = (PixmapPtr)pGlyphPicture->pDrawable;
+ ExaPixmapPriv(pGlyphPixmap);
+ PixmapPtr pCachePixmap = (PixmapPtr)cache->picture->pDrawable;
+ ExaMigrationRec pixmaps[1];
+ int cacheXoff, cacheYoff;
+
+ if (!pExaScr->info->UploadToScreen || pExaScr->swappedOut || pExaPixmap->accel_blocked)
+ return FALSE;
+
+ /* If the glyph pixmap is already uploaded, no point in doing
+ * things this way */
+ if (exaPixmapIsOffscreen(pGlyphPixmap))
+ return FALSE;
+
+ /* UploadToScreen only works if bpp match */
+ if (pGlyphPixmap->drawable.bitsPerPixel != pCachePixmap->drawable.bitsPerPixel)
+ return FALSE;
+
+ /* cache pixmap must be offscreen. */
+ pixmaps[0].as_dst = TRUE;
+ pixmaps[0].as_src = FALSE;
+ pixmaps[0].pPix = pCachePixmap;
+ pixmaps[0].pReg = NULL;
+ exaDoMigration (pixmaps, 1, TRUE);
+
+ pCachePixmap = exaGetOffscreenPixmap ((DrawablePtr)pCachePixmap, &cacheXoff, &cacheYoff);
+ if (!pCachePixmap)
+ return FALSE;
+
+ if (!pExaScr->info->UploadToScreen(pCachePixmap,
+ CACHE_X(pos) + cacheXoff,
+ CACHE_Y(pos) + cacheYoff,
+ pGlyph->info.width,
+ pGlyph->info.height,
+ (char *)pExaPixmap->sys_ptr,
+ pExaPixmap->sys_pitch))
+ return FALSE;
+
+ exaPixmapDirty (pCachePixmap,
+ CACHE_X(pos) + cacheXoff,
+ CACHE_Y(pos) + cacheYoff,
+ CACHE_X(pos) + cacheXoff + pGlyph->info.width,
+ CACHE_Y(pos) + cacheYoff + pGlyph->info.height);
+
+ return TRUE;
+}
+
+static ExaGlyphCacheResult
+exaGlyphCacheBufferGlyph(ScreenPtr pScreen,
+ ExaGlyphCachePtr cache,
+ ExaGlyphBufferPtr buffer,
+ GlyphPtr pGlyph,
+ int xGlyph,
+ int yGlyph)
+{
+ ExaCompositeRectPtr rect;
+ int pos;
+
+ if (buffer->source && buffer->source != 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));
+ } else {
+ if (cache->glyphCount < cache->size) {
+ /* Space remaining; we fill from the start */
+ pos = cache->glyphCount;
+ 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;
+ DBG_GLYPH_CACHE((" evicting glyph at %d\n", pos));
+ if (buffer->count) {
+ int x, y;
+ int i;
+
+ x = CACHE_X(pos);
+ y = CACHE_Y(pos);
+
+ for (i = 0; i < buffer->count; i++) {
+ if (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;
+ }
+
+ /* Now actually upload the glyph into the cache picture; if
+ * we can't do it with UploadToScreen (because the glyph is
+ * offscreen, etc), we fall back to CompositePicture.
+ */
+ if (!exaGlyphCacheUploadGlyph(pScreen, cache, pos, pGlyph)) {
+ CompositePicture (PictOpSrc,
+ GlyphPicture(pGlyph)[pScreen->myNum],
+ None,
+ cache->picture,
+ 0, 0,
+ 0, 0,
+ CACHE_X(pos),
+ CACHE_Y(pos),
+ pGlyph->info.width,
+ pGlyph->info.height);
+ }
+
+ }
+
+
+ buffer->source = cache->picture;
+
+ rect = &buffer->rects[buffer->count];
+ rect->xSrc = CACHE_X(pos);
+ rect->ySrc = CACHE_Y(pos);
+ rect->xDst = xGlyph - pGlyph->info.x;
+ rect->yDst = yGlyph - pGlyph->info.y;
+ 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,
+ int xGlyph,
+ int yGlyph)
+{
+ ExaScreenPriv(pScreen);
+ unsigned int format = (GlyphPicture(pGlyph)[pScreen->myNum])->format;
+ int width = pGlyph->info.width;
+ int height = pGlyph->info.height;
+ ExaCompositeRectPtr rect;
+ PicturePtr source;
+ 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, xGlyph, yGlyph);
+ switch (result) {
+ case ExaGlyphFail:
+ break;
+ case ExaGlyphSuccess:
+ case ExaGlyphNeedFlush:
+ return result;
+ }
+ }
+ }
+
+ /* Couldn't find the glyph in the cache, use the glyph picture directly */
+
+ source = GlyphPicture(pGlyph)[pScreen->myNum];
+ if (buffer->source && buffer->source != source)
+ return ExaGlyphNeedFlush;
+
+ buffer->source = source;
+
+ rect = &buffer->rects[buffer->count];
+ rect->xSrc = 0;
+ rect->ySrc = 0;
+ rect->xDst = xGlyph - pGlyph->info.x;
+ rect->yDst = yGlyph - pGlyph->info.y;
+ rect->width = pGlyph->info.width;
+ rect->height = pGlyph->info.height;
+
+ buffer->count++;
+
+ return ExaGlyphSuccess;
+}
+
+static void
+exaGlyphsToMask(PicturePtr pMask,
+ ExaGlyphBufferPtr buffer)
+{
+ exaCompositeRects(PictOpAdd, buffer->source, pMask,
+ buffer->count, buffer->rects);
+
+ buffer->count = 0;
+ buffer->source = NULL;
+}
+
+static void
+exaGlyphsToDst(CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ ExaGlyphBufferPtr buffer,
+ INT16 xSrc,
+ INT16 ySrc,
+ INT16 xDst,
+ INT16 yDst)
+{
+ int i;
+
+ for (i = 0; i < buffer->count; i++) {
+ ExaCompositeRectPtr rect = &buffer->rects[i];
+
+ CompositePicture (op,
+ pSrc,
+ buffer->source,
+ pDst,
+ xSrc + rect->xDst - xDst,
+ ySrc + rect->yDst - yDst,
+ rect->xSrc,
+ rect->ySrc,
+ rect->xDst,
+ rect->yDst,
+ rect->width,
+ rect->height);
+ }
+
+ buffer->count = 0;
+ buffer->source = 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;
+ }
+ }
+}
+
+/**
+ * Returns TRUE if the glyphs in the lists intersect. Only checks based on
+ * bounding box, which appears to be good enough to catch most cases at least.
+ */
+static Bool
+exaGlyphsIntersect(int nlist, GlyphListPtr list, GlyphPtr *glyphs)
+{
+ int x1, x2, y1, y2;
+ int n;
+ GlyphPtr glyph;
+ int x, y;
+ BoxRec extents;
+ Bool first = TRUE;
+
+ x = 0;
+ y = 0;
+ while (nlist--) {
+ x += list->xOff;
+ y += list->yOff;
+ n = list->len;
+ list++;
+ while (n--) {
+ glyph = *glyphs++;
+
+ if (glyph->info.width == 0 || glyph->info.height == 0) {
+ x += glyph->info.xOff;
+ y += glyph->info.yOff;
+ continue;
+ }
+
+ 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 (first) {
+ extents.x1 = x1;
+ extents.y1 = y1;
+ extents.x2 = x2;
+ extents.y2 = y2;
+ first = FALSE;
+ } else {
+ if (x1 < extents.x2 && x2 > extents.x1 &&
+ y1 < extents.y2 && y2 > extents.y1)
+ {
+ return TRUE;
+ }
+
+ 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;
+ }
+ }
+
+ return FALSE;
+}
+
+#define NeedsComponent(f) (PICT_FORMAT_A(f) != 0 && PICT_FORMAT_RGB(f) != 0)
+
+void
+exaGlyphs (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int nlist,
+ GlyphListPtr list,
+ GlyphPtr *glyphs)
+{
+ PicturePtr pPicture;
+ PixmapPtr pMaskPixmap = 0;
+ PicturePtr pMask;
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ int width = 0, height = 0;
+ int x, y;
+ int xDst = list->xOff, yDst = list->yOff;
+ int n;
+ GlyphPtr glyph;
+ int error;
+ BoxRec extents = {0, 0, 0, 0};
+ CARD32 component_alpha;
+ ExaGlyphBuffer buffer;
+
+ /* If we don't have a mask format but all the glyphs have the same format
+ * and don't intersect, use the glyph format as mask format for the full
+ * benefits of the glyph cache.
+ */
+ if (!maskFormat) {
+ Bool sameFormat = TRUE;
+ int i;
+
+ maskFormat = list[0].format;
+
+ for (i = 0; i < nlist; i++) {
+ if (maskFormat->format != list[i].format->format) {
+ sameFormat = FALSE;
+ break;
+ }
+ }
+
+ if (!sameFormat || (maskFormat->depth != 1 &&
+ exaGlyphsIntersect(nlist, list, glyphs))) {
+ maskFormat = NULL;
+ }
+ }
+
+ if (maskFormat)
+ {
+ 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)
+ {
+ (*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
+ {
+ pMask = pDst;
+ x = 0;
+ y = 0;
+ }
+ buffer.count = 0;
+ buffer.source = NULL;
+ while (nlist--)
+ {
+ x += list->xOff;
+ y += list->yOff;
+ n = list->len;
+ while (n--)
+ {
+ glyph = *glyphs++;
+ pPicture = GlyphPicture (glyph)[pScreen->myNum];
+
+ if (glyph->info.width > 0 && glyph->info.height > 0 &&
+ exaBufferGlyph(pScreen, &buffer, glyph, x, y) == ExaGlyphNeedFlush)
+ {
+ if (maskFormat)
+ exaGlyphsToMask(pMask, &buffer);
+ else
+ exaGlyphsToDst(op, pSrc, pDst, &buffer,
+ xSrc, ySrc, xDst, yDst);
+
+ exaBufferGlyph(pScreen, &buffer, glyph, x, y);
+ }
+
+ x += glyph->info.xOff;
+ y += glyph->info.yOff;
+ }
+ list++;
+ }
+
+ if (maskFormat)
+ exaGlyphsToMask(pMask, &buffer);
+ else
+ exaGlyphsToDst(op, pSrc, pDst, &buffer,
+ xSrc, ySrc, xDst, yDst);
+
+ if (maskFormat)
+ {
+ x = extents.x1;
+ y = extents.y1;
+ CompositePicture (op,
+ pSrc,
+ pMask,
+ pDst,
+ xSrc + x - xDst,
+ ySrc + y - yDst,
+ 0, 0,
+ x, y,
+ width, height);
+ FreePicture ((pointer) pMask, (XID) 0);
+ (*pScreen->DestroyPixmap) (pMaskPixmap);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-19 04:21:11 +0000