479 lines
11 KiB
C
479 lines
11 KiB
C
/*
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* $XFree86: xc/programs/Xserver/render/glyph.c,v 1.5 2001/01/30 07:01:22 keithp Exp $
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*
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* Copyright © 2000 SuSE, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of SuSE not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. SuSE makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
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* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Author: Keith Packard, SuSE, Inc.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "misc.h"
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#include "scrnintstr.h"
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#include "os.h"
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#include "regionstr.h"
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#include "validate.h"
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#include "windowstr.h"
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#include "input.h"
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#include "resource.h"
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#include "colormapst.h"
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#include "cursorstr.h"
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#include "dixstruct.h"
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#include "gcstruct.h"
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#include "servermd.h"
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#include "picturestr.h"
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#include "glyphstr.h"
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/*
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* From Knuth -- a good choice for hash/rehash values is p, p-2 where
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* p and p-2 are both prime. These tables are sized to have an extra 10%
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* free to avoid exponential performance degradation as the hash table fills
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*/
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static GlyphHashSetRec glyphHashSets[] = {
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{ 32, 43, 41 },
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{ 64, 73, 71 },
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{ 128, 151, 149 },
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{ 256, 283, 281 },
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{ 512, 571, 569 },
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{ 1024, 1153, 1151 },
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{ 2048, 2269, 2267 },
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{ 4096, 4519, 4517 },
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{ 8192, 9013, 9011 },
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{ 16384, 18043, 18041 },
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{ 32768, 36109, 36107 },
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{ 65536, 72091, 72089 },
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{ 131072, 144409, 144407 },
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{ 262144, 288361, 288359 },
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{ 524288, 576883, 576881 },
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{ 1048576, 1153459, 1153457 },
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{ 2097152, 2307163, 2307161 },
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{ 4194304, 4613893, 4613891 },
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{ 8388608, 9227641, 9227639 },
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{ 16777216, 18455029, 18455027 },
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{ 33554432, 36911011, 36911009 },
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{ 67108864, 73819861, 73819859 },
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{ 134217728, 147639589, 147639587 },
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{ 268435456, 295279081, 295279079 },
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{ 536870912, 590559793, 590559791 }
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};
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#define NGLYPHHASHSETS (sizeof(glyphHashSets)/sizeof(glyphHashSets[0]))
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const CARD8 glyphDepths[GlyphFormatNum] = { 1, 4, 8, 16, 32 };
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GlyphHashRec globalGlyphs[GlyphFormatNum];
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GlyphHashSetPtr
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FindGlyphHashSet (CARD32 filled)
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{
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int i;
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for (i = 0; i < NGLYPHHASHSETS; i++)
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if (glyphHashSets[i].entries >= filled)
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return &glyphHashSets[i];
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return 0;
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}
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static int _GlyphSetPrivateAllocateIndex = 0;
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int
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AllocateGlyphSetPrivateIndex (void)
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{
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return _GlyphSetPrivateAllocateIndex++;
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}
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void
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ResetGlyphSetPrivateIndex (void)
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{
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_GlyphSetPrivateAllocateIndex = 0;
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}
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Bool
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_GlyphSetSetNewPrivate (GlyphSetPtr glyphSet, int n, pointer ptr)
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{
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pointer *new;
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if (n > glyphSet->maxPrivate) {
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if (glyphSet->devPrivates &&
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glyphSet->devPrivates != (pointer)(&glyphSet[1])) {
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new = (pointer *) xrealloc (glyphSet->devPrivates,
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(n + 1) * sizeof (pointer));
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if (!new)
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return FALSE;
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} else {
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new = (pointer *) xalloc ((n + 1) * sizeof (pointer));
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if (!new)
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return FALSE;
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if (glyphSet->devPrivates)
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memcpy (new,
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glyphSet->devPrivates,
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(glyphSet->maxPrivate + 1) * sizeof (pointer));
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}
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glyphSet->devPrivates = new;
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/* Zero out new, uninitialize privates */
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while (++glyphSet->maxPrivate < n)
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glyphSet->devPrivates[glyphSet->maxPrivate] = (pointer)0;
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}
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glyphSet->devPrivates[n] = ptr;
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return TRUE;
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}
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Bool
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GlyphInit (ScreenPtr pScreen)
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{
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return TRUE;
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}
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GlyphRefPtr
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FindGlyphRef (GlyphHashPtr hash, CARD32 signature, Bool match, GlyphPtr compare)
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{
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CARD32 elt, step, s;
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GlyphPtr glyph;
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GlyphRefPtr table, gr, del;
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CARD32 tableSize = hash->hashSet->size;
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table = hash->table;
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elt = signature % tableSize;
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step = 0;
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del = 0;
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for (;;)
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{
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gr = &table[elt];
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s = gr->signature;
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glyph = gr->glyph;
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if (!glyph)
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{
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if (del)
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gr = del;
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break;
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}
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if (glyph == DeletedGlyph)
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{
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if (!del)
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del = gr;
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else if (gr == del)
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break;
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}
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else if (s == signature &&
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(!match ||
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memcmp (&compare->info, &glyph->info, compare->size) == 0))
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{
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break;
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}
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if (!step)
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{
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step = signature % hash->hashSet->rehash;
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if (!step)
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step = 1;
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}
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elt += step;
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if (elt >= tableSize)
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elt -= tableSize;
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}
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return gr;
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}
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CARD32
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HashGlyph (GlyphPtr glyph)
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{
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CARD32 *bits = (CARD32 *) &(glyph->info);
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CARD32 hash;
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int n = glyph->size / sizeof (CARD32);
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hash = 0;
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while (n--)
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hash ^= *bits++;
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return hash;
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}
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#ifdef CHECK_DUPLICATES
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void
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DuplicateRef (GlyphPtr glyph, char *where)
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{
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ErrorF ("Duplicate Glyph 0x%x from %s\n", glyph, where);
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}
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void
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CheckDuplicates (GlyphHashPtr hash, char *where)
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{
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GlyphPtr g;
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int i, j;
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for (i = 0; i < hash->hashSet->size; i++)
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{
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g = hash->table[i].glyph;
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if (!g || g == DeletedGlyph)
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continue;
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for (j = i + 1; j < hash->hashSet->size; j++)
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if (hash->table[j].glyph == g)
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DuplicateRef (g, where);
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}
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}
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#else
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#define CheckDuplicates(a,b)
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#define DuplicateRef(a,b)
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#endif
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void
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FreeGlyph (GlyphPtr glyph, int format)
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{
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CheckDuplicates (&globalGlyphs[format], "FreeGlyph");
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if (--glyph->refcnt == 0)
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{
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GlyphRefPtr gr;
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int i;
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int first;
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first = -1;
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for (i = 0; i < globalGlyphs[format].hashSet->size; i++)
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if (globalGlyphs[format].table[i].glyph == glyph)
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{
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if (first != -1)
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DuplicateRef (glyph, "FreeGlyph check");
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first = i;
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}
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gr = FindGlyphRef (&globalGlyphs[format],
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HashGlyph (glyph), TRUE, glyph);
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if (gr - globalGlyphs[format].table != first)
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DuplicateRef (glyph, "Found wrong one");
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if (gr->glyph && gr->glyph != DeletedGlyph)
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{
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gr->glyph = DeletedGlyph;
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gr->signature = 0;
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globalGlyphs[format].tableEntries--;
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}
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xfree (glyph);
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}
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}
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void
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AddGlyph (GlyphSetPtr glyphSet, GlyphPtr glyph, Glyph id)
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{
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GlyphRefPtr gr;
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CARD32 hash;
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CheckDuplicates (&globalGlyphs[glyphSet->fdepth], "AddGlyph top global");
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/* Locate existing matching glyph */
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hash = HashGlyph (glyph);
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gr = FindGlyphRef (&globalGlyphs[glyphSet->fdepth], hash, TRUE, glyph);
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if (gr->glyph && gr->glyph != DeletedGlyph)
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{
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xfree (glyph);
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glyph = gr->glyph;
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}
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else
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{
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gr->glyph = glyph;
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gr->signature = hash;
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globalGlyphs[glyphSet->fdepth].tableEntries++;
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}
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/* Insert/replace glyphset value */
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gr = FindGlyphRef (&glyphSet->hash, id, FALSE, 0);
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++glyph->refcnt;
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if (gr->glyph && gr->glyph != DeletedGlyph)
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FreeGlyph (gr->glyph, glyphSet->fdepth);
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else
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glyphSet->hash.tableEntries++;
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gr->glyph = glyph;
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gr->signature = id;
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CheckDuplicates (&globalGlyphs[glyphSet->fdepth], "AddGlyph bottom");
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}
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Bool
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DeleteGlyph (GlyphSetPtr glyphSet, Glyph id)
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{
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GlyphRefPtr gr;
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GlyphPtr glyph;
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gr = FindGlyphRef (&glyphSet->hash, id, FALSE, 0);
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glyph = gr->glyph;
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if (glyph && glyph != DeletedGlyph)
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{
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gr->glyph = DeletedGlyph;
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glyphSet->hash.tableEntries--;
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FreeGlyph (glyph, glyphSet->fdepth);
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return TRUE;
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}
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return FALSE;
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}
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GlyphPtr
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FindGlyph (GlyphSetPtr glyphSet, Glyph id)
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{
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GlyphPtr glyph;
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glyph = FindGlyphRef (&glyphSet->hash, id, FALSE, 0)->glyph;
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if (glyph == DeletedGlyph)
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glyph = 0;
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return glyph;
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}
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GlyphPtr
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AllocateGlyph (xGlyphInfo *gi, int fdepth)
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{
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int size;
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GlyphPtr glyph;
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size = gi->height * PixmapBytePad (gi->width, glyphDepths[fdepth]);
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glyph = (GlyphPtr) xalloc (size + sizeof (GlyphRec));
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if (!glyph)
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return 0;
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glyph->refcnt = 0;
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glyph->size = size + sizeof (xGlyphInfo);
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glyph->info = *gi;
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return glyph;
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}
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Bool
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AllocateGlyphHash (GlyphHashPtr hash, GlyphHashSetPtr hashSet)
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{
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hash->table = (GlyphRefPtr) xalloc (hashSet->size * sizeof (GlyphRefRec));
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if (!hash->table)
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return FALSE;
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memset (hash->table, 0, hashSet->size * sizeof (GlyphRefRec));
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hash->hashSet = hashSet;
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hash->tableEntries = 0;
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return TRUE;
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}
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Bool
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ResizeGlyphHash (GlyphHashPtr hash, CARD32 change, Bool global)
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{
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CARD32 tableEntries;
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GlyphHashSetPtr hashSet;
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GlyphHashRec newHash;
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GlyphRefPtr gr;
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GlyphPtr glyph;
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int i;
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int oldSize;
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CARD32 s;
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tableEntries = hash->tableEntries + change;
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hashSet = FindGlyphHashSet (tableEntries);
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if (hashSet == hash->hashSet)
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return TRUE;
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if (global)
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CheckDuplicates (hash, "ResizeGlyphHash top");
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if (!AllocateGlyphHash (&newHash, hashSet))
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return FALSE;
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if (hash->table)
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{
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oldSize = hash->hashSet->size;
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for (i = 0; i < oldSize; i++)
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{
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glyph = hash->table[i].glyph;
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if (glyph && glyph != DeletedGlyph)
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{
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s = hash->table[i].signature;
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gr = FindGlyphRef (&newHash, s, global, glyph);
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gr->signature = s;
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gr->glyph = glyph;
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++newHash.tableEntries;
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}
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}
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xfree (hash->table);
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}
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*hash = newHash;
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if (global)
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CheckDuplicates (hash, "ResizeGlyphHash bottom");
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return TRUE;
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}
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Bool
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ResizeGlyphSet (GlyphSetPtr glyphSet, CARD32 change)
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{
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return (ResizeGlyphHash (&glyphSet->hash, change, FALSE) &&
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ResizeGlyphHash (&globalGlyphs[glyphSet->fdepth], change, TRUE));
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}
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GlyphSetPtr
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AllocateGlyphSet (int fdepth, PictFormatPtr format)
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{
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GlyphSetPtr glyphSet;
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int size;
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if (!globalGlyphs[fdepth].hashSet)
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{
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if (!AllocateGlyphHash (&globalGlyphs[fdepth], &glyphHashSets[0]))
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return FALSE;
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}
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size = (sizeof (GlyphSetRec) +
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(sizeof (pointer) * _GlyphSetPrivateAllocateIndex));
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glyphSet = xalloc (size);
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if (!glyphSet)
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return FALSE;
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bzero((char *)glyphSet, size);
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glyphSet->maxPrivate = _GlyphSetPrivateAllocateIndex - 1;
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if (_GlyphSetPrivateAllocateIndex)
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glyphSet->devPrivates = (pointer)(&glyphSet[1]);
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if (!AllocateGlyphHash (&glyphSet->hash, &glyphHashSets[0]))
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{
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xfree (glyphSet);
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return FALSE;
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}
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glyphSet->refcnt = 1;
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glyphSet->fdepth = fdepth;
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glyphSet->format = format;
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return glyphSet;
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}
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int
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FreeGlyphSet (pointer value,
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XID gid)
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{
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GlyphSetPtr glyphSet = (GlyphSetPtr) value;
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if (--glyphSet->refcnt == 0)
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{
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CARD32 i, tableSize = glyphSet->hash.hashSet->size;
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GlyphRefPtr table = glyphSet->hash.table;
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GlyphPtr glyph;
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for (i = 0; i < tableSize; i++)
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{
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glyph = table[i].glyph;
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if (glyph && glyph != DeletedGlyph)
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FreeGlyph (glyph, glyphSet->fdepth);
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}
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if (!globalGlyphs[glyphSet->fdepth].tableEntries)
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{
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xfree (globalGlyphs[glyphSet->fdepth].table);
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globalGlyphs[glyphSet->fdepth].table = 0;
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globalGlyphs[glyphSet->fdepth].hashSet = 0;
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}
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else
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ResizeGlyphHash (&globalGlyphs[glyphSet->fdepth], 0, TRUE);
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xfree (table);
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if (glyphSet->devPrivates &&
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glyphSet->devPrivates != (pointer)(&glyphSet[1]))
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xfree(glyphSet->devPrivates);
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xfree (glyphSet);
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}
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return Success;
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}
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