/* create a color table */
Ulong *get_color_table(DviDevice *dev,
int nlevels, Ulong fg, Ulong bg, double gamma, int density)
{
ColorCache *cc, *tofree;
int lohits;
Ulong *pixels;
int status;
lohits = color_cache[0].hits;
tofree = &color_cache[0];
/* look in the cache and see if we have one that matches this request */
for(cc = &color_cache[0]; cc < &color_cache[cc_entries]; cc++) {
if(cc->hits < lohits) {
lohits = cc->hits;
tofree = cc;
}
if(cc->fg == fg && cc->bg == bg && cc->density == density &&
cc->nlevels == nlevels && fabs(cc->gamma - gamma) <= GAMMA_DIFF)
break;
}
if(cc < &color_cache[cc_entries]) {
cc->hits++;
return cc->pixels;
}
DEBUG((DBG_DEVICE, "Adding color table to cache (fg=%lu, bg=%lu, n=%d)\n",
fg, bg, nlevels));
/* no entry was found in the cache, create a new one */
if(cc_entries < CCSIZE) {
cc = &color_cache[cc_entries++];
cc->pixels = NULL;
} else {
cc = tofree;
mdvi_free(cc->pixels);
}
pixels = xnalloc(Ulong, nlevels);
status = dev->alloc_colors(dev->device_data,
pixels, nlevels, fg, bg, gamma, density);
if(status < 0) {
mdvi_free(pixels);
return NULL;
}
cc->fg = fg;
cc->bg = bg;
cc->gamma = gamma;
cc->density = density;
cc->nlevels = nlevels;
cc->pixels = pixels;
cc->hits = 1;
return pixels;
}
xSymbolTable* xSymbolTable_create(int capacity)
{
capacity = (capacity <= 0 ? xSymbolTable_DEFAULT_CAPACITY : nextPrime(capacity));
xSymbolTable* table = xalloc(xSymbolTable);
table->capacity = capacity;
table->load = 0;
table->slot = xnalloc(xSTPair, capacity);
for (int i = 0; i < table->capacity; i++) {
table->slot[i].symbol = NULL;
}
return table;
}
static int gf_load_font(DviParams *unused, DviFont *font)
{
int i;
int n;
int loc;
int hic;
FILE *p;
Int32 word;
int op;
long alpha, beta, z;
#ifndef NODEBUG
char s[256];
#endif
p = font->in;
/* check preamble */
loc = fuget1(p); hic = fuget1(p);
if(loc != GF_PRE || hic != GF_ID)
goto badgf;
loc = fuget1(p);
#ifndef NODEBUG
for(i = 0; i < loc; i++)
s[i] = fuget1(p);
s[i] = 0;
DEBUG((DBG_FONTS, "(gf) %s: %s\n", font->fontname, s));
#else
fseek(p, (long)loc, SEEK_CUR);
#endif
/* now read character locators in postamble */
if(fseek(p, (long)-1, SEEK_END) == -1)
return -1;
n = 0;
while((op = fuget1(p)) == GF_TRAILER) {
if(fseek(p, (long)-2, SEEK_CUR) < 0)
break;
n++;
}
if(op != GF_ID || n < 4)
goto badgf;
/* get the pointer to the postamble */
fseek(p, (long)-5, SEEK_CUR);
op = fuget4(p);
/* jump to it */
fseek(p, (long)op, SEEK_SET);
if(fuget1(p) != GF_POST)
goto badgf;
/* skip pointer to last EOC */
fuget4(p);
/* get the design size */
font->design = fuget4(p);
/* the checksum */
word = fuget4(p);
if(word && font->checksum && font->checksum != word) {
mdvi_warning(_("%s: bad checksum (expected %u, found %u)\n"),
font->fontname, font->checksum, word);
} else if(!font->checksum)
font->checksum = word;
/* skip pixels per point ratio */
fuget4(p);
fuget4(p);
font->chars = xnalloc(DviFontChar, 256);
for(loc = 0; loc < 256; loc++)
font->chars[loc].offset = 0;
/* skip glyph "bounding box" */
fseek(p, (long)16, SEEK_CUR);
loc = 256;
hic = -1;
TFMPREPARE(font->scale, z, alpha, beta);
while((op = fuget1(p)) != GF_POST_POST) {
DviFontChar *ch;
int cc;
/* get the character code */
cc = fuget1(p);
if(cc < loc)
loc = cc;
if(cc > hic)
hic = cc;
ch = &font->chars[cc];
switch(op) {
case GF_LOC:
fsget4(p); /* skip dx */
fsget4(p); /* skip dy */
break;
case GF_LOC0:
fuget1(p); /* skip dx */
/* dy assumed 0 */
break;
default:
mdvi_error(_("%s: junk in postamble\n"), font->fontname);
goto error;
}
ch->code = cc;
ch->tfmwidth = fuget4(p);
ch->tfmwidth = TFMSCALE(ch->tfmwidth, z, alpha, beta);
ch->offset = fuget4(p);
if(ch->offset == -1)
ch->offset = 0;
/* initialize the rest of the glyph information */
ch->x = 0;
ch->y = 0;
ch->width = 0;
ch->height = 0;
ch->glyph.data = NULL;
ch->shrunk.data = NULL;
ch->grey.data = NULL;
ch->flags = 0;
ch->loaded = 0;
}
if(op != GF_POST_POST)
goto badgf;
if(loc > 0 || hic < 255) {
/* shrink to optimal size */
memmove(font->chars, font->chars + loc,
(hic - loc + 1) * sizeof(DviFontChar));
font->chars = xresize(font->chars,
DviFontChar, hic - loc + 1);
}
font->loc = loc;
font->hic = hic;
return 0;
badgf:
mdvi_error(_("%s: File corrupted, or not a GF file\n"), font->fontname);
error:
if(font->chars) {
mdvi_free(font->chars);
font->chars = NULL;
}
font->loc = font->hic = 0;
return -1;
}
