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-rw-r--r--Build/source/texk/kpathsea/tex-glyph.c424
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diff --git a/Build/source/texk/kpathsea/tex-glyph.c b/Build/source/texk/kpathsea/tex-glyph.c
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--- a/Build/source/texk/kpathsea/tex-glyph.c
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-/* tex-glyph.c: search for GF/PK files.
-
- Copyright 1993, 1994, 1995, 1996, 2008, 2009, 2011, 2017, 2018 Karl Berry.
- Copyright 1997, 1998, 1999, 2005 Olaf Weber.
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with this library; if not, see <http://www.gnu.org/licenses/>. */
-
-#include <kpathsea/config.h>
-
-#include <kpathsea/absolute.h>
-#include <kpathsea/expand.h>
-#include <kpathsea/fontmap.h>
-#include <kpathsea/pathsearch.h>
-#include <kpathsea/tex-glyph.h>
-#include <kpathsea/tex-make.h>
-#include <kpathsea/variable.h>
-
-/* Routines are in bottom-up order. */
-
-/* Support both cmr10.300pk and dpi300/cmr10.pk. (Use the latter
- instead of dpi300\cmr10.pk since DOS supports /'s, but Unix doesn't
- support \'s.) */
-#define UNIX_BITMAP_SPEC "$KPATHSEA_NAME.$KPATHSEA_DPI$KPATHSEA_FORMAT"
-#define DPI_BITMAP_SPEC "dpi$KPATHSEA_DPI/$KPATHSEA_NAME.$KPATHSEA_FORMAT"
-#ifdef WIN32
-#define DOS_BITMAP_SPEC "$KPATHSEA_DPI/$KPATHSEA_NAME.$KPATHSEA_FORMAT"
-#endif
-
-/* Look up font $KPATHSEA_NAME at resolution $KPATHSEA_DPI in PATH,
- with filename suffix EXTENSION. Return file found or NULL. */
-
-static string
-try_format (kpathsea kpse, kpse_file_format_type format)
-{
- static const_string bitmap_specs[]
- = { UNIX_BITMAP_SPEC, DPI_BITMAP_SPEC,
-#ifdef WIN32
- DOS_BITMAP_SPEC,
-#endif
- NULL };
- const_string *spec;
- boolean must_exist;
- const_string *sfx;
- string ret = NULL;
- const_string path = kpse->format_info[format].path;
- if (!path)
- path = kpathsea_init_format (kpse, format);
-
- /* Set the suffix on the name we'll be searching for. */
- sfx = kpse->format_info[format].suffix;
- if (sfx && *sfx)
- kpathsea_xputenv (kpse, "KPATHSEA_FORMAT", *sfx);
-
- /* OK, the limits on this for loop are a little hokey, but it saves
- having to repeat the body. We want to do it once with `must_exist'
- false to avoid looking on the disk for cmr10.600pk if
- dpi600/cmr10.pk is in ls-R. (The time spent in the extra variable
- expansions and db searches is negligible.) */
- for (must_exist = false; !ret && must_exist <= true; must_exist++)
- {
- for (spec = bitmap_specs; !ret && *spec; spec++)
- {
- string name = kpathsea_var_expand (kpse, *spec);
- ret = kpathsea_path_search (kpse, path, name, must_exist);
- if (name != ret)
- free (name);
- }
- }
-
- return ret;
-}
-
-/* Look for FONTNAME at resolution DPI in format FORMAT. Search the
- (entire) PK path first, then the GF path, if we're looking for both.
- Return any filename found, and (if we succeeded) fill in GLYPH_FILE. */
-
-static string
-try_size (kpathsea kpse, const_string fontname, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- kpse_file_format_type format_found;
- string ret;
- boolean try_gf = format == kpse_gf_format || format == kpse_any_glyph_format;
- boolean try_pk = format == kpse_pk_format || format == kpse_any_glyph_format;
-
- kpathsea_xputenv_int (kpse, "KPATHSEA_DPI", dpi);
-
- /* Look for PK first (since it's more likely to be found), then GF. */
- ret = try_pk ? try_format (kpse, kpse_pk_format) : NULL;
- format_found = kpse_pk_format;
-
- if (ret == NULL && try_gf) {
- ret = try_format (kpse, kpse_gf_format);
- format_found = kpse_gf_format;
- }
-
- if (ret != NULL) { /* Success. */
- if (glyph_file) { /* Fill in the return info. */
- glyph_file->name = fontname;
- glyph_file->dpi = dpi;
- glyph_file->format = format_found;
- }
- }
-
- return ret;
-}
-
-/* Look for FONTNAME at resolution DPI, then at the resolutions within
- KPSE_BITMAP_TOLERANCE of DPI. */
-
-static string
-try_resolution (kpathsea kpse, const_string fontname, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- string ret = try_size (kpse, fontname, dpi, format, glyph_file);
-
- if (!ret) {
- unsigned r;
- unsigned tolerance = KPSE_BITMAP_TOLERANCE (dpi);
- /* Cast to unsigned to shut up stupid compilers. */
- unsigned lower_bound = (int) (dpi - tolerance) < 0
- ? 0 : (unsigned)(dpi - tolerance);
- unsigned upper_bound = (unsigned)(dpi + tolerance);
-
- /* Prefer scaling up to scaling down, since scaling down can omit
- character features (Tom did this in dvips). */
- for (r = lower_bound; !ret && r <= upper_bound; r++)
- if (r != dpi)
- ret = try_size (kpse, fontname, r, format, glyph_file);
- }
-
- return ret;
-}
-
-/* Look up *FONTNAME_PTR in format FORMAT at DPI in the texfonts.map files
- that we can find, returning the filename found and GLYPH_FILE. Also
- set *FONTNAME_PTR to the real name corresponding to the alias found
- or the first alias, if that is not an alias itself. (This allows
- mktexpk to only deal with real names.) */
-
-static string
-try_fontmap (kpathsea kpse, const_string *fontname_ptr, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- const_string *mapped_names;
- const_string fontname = *fontname_ptr;
- string ret = NULL;
-
- mapped_names = kpathsea_fontmap_lookup (kpse, fontname);
- if (mapped_names) {
- const_string mapped_name;
- const_string first_name = *mapped_names;
- while (!ret && (mapped_name = *mapped_names++)) {
- kpathsea_xputenv (kpse, "KPATHSEA_NAME", mapped_name);
- ret = try_resolution (kpse, mapped_name, dpi, format, glyph_file);
- }
- if (ret) {
- /* If some alias succeeeded, return that alias. */
- *fontname_ptr = xstrdup (mapped_name);
- /* Return first alias name, unless that itself is an alias,
- in which case do nothing. */
- } else if (!kpathsea_fontmap_lookup (kpse, first_name)) {
- *fontname_ptr = xstrdup (first_name);
- }
- }
-
- return ret;
-}
-
-/* Look for FONTNAME in `kpse_fallback_resolutions', omitting DPI if we
- happen across it. Return NULL if nothing found. Pass GLYPH_FILE
- along as usual. Assume `kpse_fallback_resolutions' is sorted. */
-
-static string
-try_fallback_resolutions (kpathsea kpse,
- const_string fontname, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- unsigned s;
- int loc, max_loc;
- int lower_loc, upper_loc;
- unsigned lower_diff, upper_diff;
- unsigned closest_diff = UINT_MAX;
- string ret = NULL; /* In case the only fallback resolution is DPI. */
- loc = 0; /* -Wall */
- /* First find the fallback size closest to DPI, even including DPI. */
- for (s = 0; kpse->fallback_resolutions[s] != 0; s++)
- {
- unsigned this_diff =
- kpse->fallback_resolutions[s] > dpi
- ? kpse->fallback_resolutions[s] - dpi
- : dpi - kpse->fallback_resolutions[s];
- if (this_diff < closest_diff)
- {
- closest_diff = this_diff;
- loc = s;
- }
- }
- if (s == 0)
- return ret; /* If nothing in list, quit now. */
-
- max_loc = s;
- lower_loc = loc - 1;
- upper_loc = loc + 1;
-
- for (;;)
- {
- unsigned fallback = kpse->fallback_resolutions[loc];
- /* Don't bother to try DPI itself again. */
- if (fallback != dpi)
- {
- ret = try_resolution (kpse, fontname, fallback, format, glyph_file);
- if (ret)
- break;
- }
-
- /* That didn't work. How far away are the locs above or below? */
- lower_diff = lower_loc > -1
- ? dpi - kpse->fallback_resolutions[lower_loc] : INT_MAX;
- upper_diff = upper_loc < max_loc
- ? kpse->fallback_resolutions[upper_loc] - dpi : INT_MAX;
-
- /* But if we're at the end in both directions, quit. */
- if (lower_diff == INT_MAX && upper_diff == INT_MAX)
- break;
-
- /* Go in whichever direction is closest. */
- if (lower_diff < upper_diff)
- {
- loc = lower_loc;
- lower_loc--;
- }
- else
- {
- loc = upper_loc;
- upper_loc++;
- }
- }
-
- return ret;
-}
-
-/* See the .h file for description. This is the entry point. */
-
-string
-kpathsea_find_glyph (kpathsea kpse,
- const_string passed_fontname, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- string ret;
- kpse_glyph_source_type source;
- const_string fontname = passed_fontname;
-
- /* Start the search: try the name we're given. */
- source = kpse_glyph_source_normal;
- kpathsea_xputenv (kpse, "KPATHSEA_NAME", fontname);
- ret = try_resolution (kpse, fontname, dpi, format, glyph_file);
-
- /* Try all the various possibilities in order of preference. */
- if (!ret) {
- /* Maybe FONTNAME was an alias. */
- source = kpse_glyph_source_alias;
- ret = try_fontmap (kpse, &fontname, dpi, format, glyph_file);
-
- /* If not an alias, try creating it on the fly with mktexpk,
- unless FONTNAME is absolute or explicitly relative. */
- if (!ret && !kpathsea_absolute_p (kpse, fontname, true)) {
- source = kpse_glyph_source_maketex;
- /* `try_resolution' leaves the envvar set randomly. */
- kpathsea_xputenv_int (kpse, "KPATHSEA_DPI", dpi);
- ret = kpathsea_make_tex (kpse, format, fontname);
- }
-
- /* If mktex... succeeded, set return struct. Doesn't make sense for
- `kpse_make_tex' to set it, since it can only succeed or fail,
- unlike the other routines. */
- if (ret) {
- if (glyph_file) {
- KPSE_GLYPH_FILE_DPI (*glyph_file) = dpi;
- KPSE_GLYPH_FILE_NAME (*glyph_file) = fontname;
- }
-
- /* If mktex... failed, try any fallback resolutions. */
- } else {
- if (kpse->fallback_resolutions) {
- source = kpse_glyph_source_fallback_res;
- ret = try_fallback_resolutions (kpse, fontname, dpi,format,glyph_file);
- }
-
- /* We're down to the font of last resort. */
- if (!ret && kpse->fallback_font) {
- const_string name = kpse->fallback_font;
- source = kpse_glyph_source_fallback;
- kpathsea_xputenv (kpse, "KPATHSEA_NAME", name);
-
- /* As before, first try it at the given size. */
- ret = try_resolution (kpse, name, dpi, format, glyph_file);
-
- /* The fallback font at the fallback resolutions. */
- if (!ret && kpse->fallback_resolutions) {
- ret = try_fallback_resolutions (kpse, name, dpi, format, glyph_file);
- }
- }
- }
- }
-
- /* If RET is null, then the caller is not supposed to look at GLYPH_FILE,
- so it doesn't matter if we assign something incorrect. */
- if (glyph_file)
- KPSE_GLYPH_FILE_SOURCE (*glyph_file) = source;
-
- /* FIXME: fontname may have been allocated, but (worse) it may also
- have been assigned to struct that's passed out of this function.
- if (fontname != passed_fontname)
- free (fontname);
- */
-
- return ret;
-}
-
-#if defined (KPSE_COMPAT_API)
-string
-kpse_find_glyph (const_string passed_fontname, unsigned dpi,
- kpse_file_format_type format,
- kpse_glyph_file_type *glyph_file)
-{
- return kpathsea_find_glyph (kpse_def, passed_fontname, dpi, format,
- glyph_file);
-}
-#endif
-
-
-/* The tolerances change whether we base things on DPI1 or DPI2. */
-
-boolean
-kpathsea_bitmap_tolerance (kpathsea kpse, double dpi1, double dpi2)
-{
- unsigned tolerance = KPSE_BITMAP_TOLERANCE (dpi2);
- unsigned lower_bound = (int) (dpi2 - tolerance) < 0 ? 0 : dpi2 - tolerance;
- unsigned upper_bound = dpi2 + tolerance;
- (void)kpse; /* currenty not used */
-
- return lower_bound <= dpi1 && dpi1 <= upper_bound;
-}
-
-#if defined (KPSE_COMPAT_API)
-boolean
-kpse_bitmap_tolerance (double dpi1, double dpi2)
-{
- return kpathsea_bitmap_tolerance (kpse_def, dpi1, dpi2);
-}
-#endif
-
-
-#ifdef TEST
-
-void
-test_find_glyph (kpathsea kpse, const_string fontname, unsigned dpi)
-{
- string answer;
- kpse_glyph_file_type ret;
-
- printf ("\nSearch for %s@%u:\n\t", fontname, dpi);
-
- answer = kpathsea_find_glyph (kpse, fontname, dpi,
- kpse_any_glyph_format, &ret);
- if (answer)
- {
- string format = ret.format == kpse_pk_format ? "pk" : "gf";
- if (!ret.name)
- ret.name = "(nil)";
- printf ("%s\n\t(%s@%u, %s)\n", answer, ret.name, ret.dpi, format);
- }
- else
- puts ("(nil)");
-}
-
-
-int
-main (int argc, char **argv)
-{
- kpathsea kpse = xcalloc(1,sizeof(kpathsea_instance));
- kpathsea_set_program_name(kpse, argv[0], NULL);
- test_find_glyph (kpse, "/usr/local/lib/tex/fonts/cm/cmr10", 300); /* abs. */
- test_find_glyph (kpse, "cmr10", 300); /* normal */
- test_find_glyph (kpse, "logo10", 300); /* find gf */
- test_find_glyph (kpse, "cmr10", 299); /* find 300 */
- test_find_glyph (kpse, "circle10", 300); /* in fontmap */
- test_find_glyph (kpse, "none", 300); /* do not find */
- kpse->kpse_fallback_font = "cmr10";
- test_find_glyph (kpse, "fallback", 300); /* find fallback font cmr10 */
- kpathsea_init_fallback_resolutions (kpse, "KPATHSEA_TEST_SIZES");
- test_find_glyph (kpse, "fallbackdpi", 759); /* find fallback cmr10@300 */
-
- kpathsea_xputenv (kpse,"GFFONTS", ".");
- test_find_glyph (kpse, "cmr10", 300); /* different GFFONTS/TEXFONTS */
-
- return 0;
-}
-
-#endif /* TEST */
-
-
-/*
-Local variables:
-standalone-compile-command: "gcc -g -I. -I.. -DTEST tex-glyph.c kpathsea.a"
-End:
-*/