/* font_open.c: find font filenames. This bears no relation (but the interface) to the original font_open.c. Copyright (c) 1999-2004 The texk project Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL PAUL VOJTA OR ANY OTHER AUTHOR OF THIS SOFTWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "xdvi-config.h" #include "xdvi.h" #include "dvi-draw.h" #include "util.h" #include "events.h" #include "my-snprintf.h" #include "print-log.h" #include "statusline.h" #include "font-open.h" #include "kpathsea/c-fopen.h" #include "kpathsea/tex-glyph.h" #include #include #if HAVE_SYS_WAIT_H # include #endif #ifndef WIFEXITED # define WIFEXITED(status) (((status) & 255) == 0) #endif #ifndef WEXITSTATUS # define WEXITSTATUS(status) ((unsigned)(status) >> 8) #endif #ifndef WIFSIGNALED # ifndef WIFSTOPPED # define WIFSTOPPED(status) (((status) & 0xff) == 0x7f) # endif # define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status)) #endif #ifndef WTERMSIG # define WTERMSIG(status) ((status) & 0x7f) #endif /* if POSIX O_NONBLOCK is not available, use O_NDELAY */ #if !defined(O_NONBLOCK) && defined(O_NDELAY) # define O_NONBLOCK O_NDELAY #endif #ifdef EWOULDBLOCK # ifdef EAGAIN # define AGAIN_CONDITION (errno == EWOULDBLOCK || errno == EAGAIN) # else # define AGAIN_CONDITION (errno == EWOULDBLOCK) # endif #else /* EWOULDBLOCK */ # ifdef EAGAIN # define AGAIN_CONDITION (errno == EAGAIN) # endif #endif /* EWOULDBLOCK */ #if HAVE_POLL # include # define XIO_IN POLLIN # define XIO_OUT POLLOUT #else # define XIO_IN 1 # define XIO_OUT 2 #endif /* HAVE_POLL */ #if 0 // static int mktexpk_io[2]; // static struct xchild mktexpk_child = { NULL, 0, True, "font creation", NULL, NULL, mktexpk_ended }; // // static char *read_from_mktexpk(int ignored); // static void write_to_mktexpk(int ignored); // // static struct xio mktexpk_xio = { NULL, 0, XIO_IN, // #if HAVE_POLL // NULL, // #endif // read_from_mktexpk, // NULL}; // static void mktexpk_ended(int status, struct xchild *this) { char str[1024] = ""; char *err_msg = NULL; fprintf(stderr, "------- MKTEXPK_ENDED!\n"); if (this->io != NULL && WIFEXITED(status)) { err_msg = (this->io->read_proc)(this->io->fd); SNPRINTF(str, 1024, "\nProcess `%s' returned exit code %d.\n", this->name, WEXITSTATUS(status)); str[1024 - 1] = '\0'; printlog_append_str(str); if (err_msg != NULL) { fprintf(stderr, "FROM MKTEXPK: |%s|\n", err_msg); printlog_append_str(err_msg); } } printlog_enable_closebutton(); /* free(this->name); */ /* free(this->io); */ /* free(this); */ // read_from_mktexpk(0); // clear_io(this->io); // (void)close(mktexpk_xio.fd); // // if (WIFEXITED(status)) { // if (WEXITSTATUS(status) == 0) { // printlog_append("Done.\n", strlen("Done.\n")); // } // else // sprintf(str, "\nPrint process returned exit code %d.\n", // WEXITSTATUS(status)); // } // else if (WIFSIGNALED(status)) // sprintf(str, "\nPrint process terminated by signal %d.\n", // WTERMSIG(status)); // else // sprintf(str, "\nPrint process returned unknown status 0x%x.\n", // status); // } static char * read_from_mktexpk(int fd) { int bytes; char line[80]; char *buf; fprintf(stderr, "------- READ_FROM_MKTEXPK!\n"); for (;;) { #ifndef MOTIF bytes = read(fd, line, sizeof line); #else bytes = read(fd, line, sizeof line - 1); #endif if (bytes < 0) { if (AGAIN_CONDITION) break; perror("xdvi: read_from_mktexpk"); break; } if (bytes == 0) break; else { #ifdef MOTIF line[bytes] = '\0'; #endif // fprintf(stderr, "------- READ_FROM_MKTEXPK:|%s|\n", line); printlog_append(line, bytes); } } buf = xmalloc(bytes + 1); memcpy(buf, line, bytes); buf[bytes] = '\0'; return buf; } // static void // write_to_mktexpk(int ignored) // { // UNUSED(ignored); // // return; // } #endif /* 0 */ /* We try for a VF first because that's what dvips does. Also, it's easier to avoid running mktexpk if we have a VF this way. */ FILE * font_open(char *font, char **font_ret, double dpi, int *dpi_ret, char **filename_ret #ifdef T1LIB , int *t1id #endif ) { char *name; kpse_glyph_file_type file_ret; /* defaults in case of success; filename_ret will be non-NULL iff the fallback font is used. */ *font_ret = NULL; /* filename_ret is NULL iff a T1 version of a font has been used */ *filename_ret = NULL; *dpi_ret = dpi; if (resource.omega) { /* for omega, first try 16-bit ovf's, then 8-bit vf's. */ name = kpse_find_ovf(font); if (name == NULL) name = kpse_find_vf(font); } else { name = kpse_find_vf(font); } #ifdef T1LIB if (resource.t1lib) { *t1id = -1; } #endif /* T1LIB */ if (name) { /* found a vf font */ /* pretend it has the expected dpi value, else caller will complain */ *dpi_ret = dpi; *filename_ret = name; return XFOPEN(name, FOPEN_R_MODE); } #ifdef T1LIB if (resource.t1lib) { /* First attempt: T1 font of correct size */ *t1id = find_T1_font(font); if (*t1id >= 0) { TRACE_T1((stderr, "found T1 font %s", font)); return NULL; } TRACE_T1((stderr, "T1 version of font %s not found, trying pixel version next, then fallback", font)); } #endif /* T1LIB */ #ifdef EXPERIMENTAL_DELAYED_MTKEXPK /* From this point on, kpathsea might create some fonts (and fail horribly ...) We want to catch its error messages and present them to the user in a window, so fork and collect all output of the child into a pipe, similar to what's done for dvips. Actually, the approach outlined here is bogus, since it still ignores the main issue of knowing, in the parent, when all the font creation commands have finished (so that we can start drawing the pages). What is needed here is a child procedure that works through a stack of font names, creating the fonts if needed, and the parent checking the return values from these font creation processes. Only after the child is finished, xdvi can go on drawing the page, by calling the drawing routine *from within* mktexpk_ended(). */ { struct xchild *mktexpk_child = xmalloc(sizeof *mktexpk_child); struct xio *mktexpk_xio = xmalloc(sizeof *mktexpk_xio); int mktexpk_io[2]; int pid; fprintf(stderr, "BEFORE CREATING PIPE\n"); if (xpipe(mktexpk_io) != 0) { perror("[xdvi] pipe"); return NULL; } /* flush output buffers to avoid double buffering (i.e. data waiting in the output buffer being written twice, by the parent and the child) */ fflush(stderr); fflush(stdout); switch (pid = fork()) { case -1: /* forking error */ perror("fork"); close(mktexpk_io[0]); close(mktexpk_io[1]); return NULL; case 0: /* child */ fprintf(stderr, "CHILD\n"); close(mktexpk_io[0]); /* no reading from io */ /* make stdout and stderr of child go to mktexpk_io[1] */ if (mktexpk_io[1] == STDOUT_FILENO) XDVI_ABORT((stderr, "mktexpk_io[1] shouldn't be STDOUT_FILENO")); if (dup2(mktexpk_io[1], STDOUT_FILENO) != STDOUT_FILENO) XDVI_ABORT((stderr, "dup2: mktexpk_io[1], STDOUT_FILENO: %s", strerror(errno))); if (mktexpk_io[1] == STDERR_FILENO) XDVI_ABORT((stderr, "mktexpk_io[1] shouldn't be STDERR_FILENO")); if (dup2(mktexpk_io[1], STDERR_FILENO) != STDERR_FILENO) XDVI_ABORT((stderr, "dup2: mktexpk_io[1], STDERR_FILENO: %s", strerror(errno))); close(mktexpk_io[1]); fprintf(stderr, "Running ...\n"); fprintf(stdout, "Running to stdout ...\n"); /* TODO: We could use a convenience routine from kpathsea (which we'd need to create first though) like kpse_find_glyph_nocreate() that just returns NULL instead of invoking mktexpk. However this still doesn't give us access to error messages from mktexpk etc. Maybe it would be better to collect all output from mktexpk into a `log' window, and at the same time filter the output for (shorter) messages in the statusline, a la: `generating font %s (n of m) ...' How is the `n of m' part done in e.g. kdvi? Investigate. */ /* Second attempt: PK/GF/... font within allowable size range */ name = kpse_find_glyph(font, (unsigned)(dpi + .5), kpse_any_glyph_format, &file_ret); if (name) { /* success */ fprintf(stderr, "\n1 DPI: %d\nFONTNAME: %s\n", file_ret.dpi, name); *dpi_ret = file_ret.dpi; *filename_ret = name; _exit(0); /* ? return XFOPEN(name, FOPEN_R_MODE); */ } else if (resource.alt_font != NULL) { /* The strange thing about kpse_find_glyph() is that it won't create a PK version of alt_font if it doesn't already exist. So we invoke it explicitly a second time for that one. */ TRACE_T1((stderr, "Trying fallback")); #ifdef T1LIB if (resource.t1lib) { /* Third attempt: T1 version of fallback font */ *t1id = find_T1_font(resource.alt_font); if (*t1id >= 0) { TRACE_T1((stderr, "found fallback font for %s: %s", font, resource.alt_font)); *font_ret = xstrdup(resource.alt_font); _exit(0); } TRACE_T1((stderr, "Type1 version of fallback font %s not found, trying pixel version", resource.alt_font)); } #endif /* T1LIB */ /* Forth attempt: PK version of fallback font */ name = kpse_find_glyph(resource.alt_font, (unsigned)(dpi + .5), kpse_any_glyph_format, &file_ret); if (name) { /* success */ fprintf(stderr, "\n2 DPI: %d\nFONTNAME: %s\nRET_FONT: %s\n", file_ret.dpi, name, resource.alt_font); *dpi_ret = file_ret.dpi; *filename_ret = name; *font_ret = xstrdup(resource.alt_font); _exit(0); /* ? return XFOPEN(name, FOPEN_R_MODE); */ } } _exit(1); default: /* parent */ close(mktexpk_io[1]); /* no writing to io */ mktexpk_xio->next = NULL; mktexpk_xio->fd = mktexpk_io[0]; mktexpk_xio->xio_events = XIO_IN; #if HAVE_POLL mktexpk_xio->pfd = NULL; #endif mktexpk_xio->read_proc = read_from_mktexpk; mktexpk_xio->write_proc = NULL; mktexpk_child->next = NULL; mktexpk_child->pid = pid; mktexpk_child->name = xstrdup(font); mktexpk_child->data = NULL; mktexpk_child->proc = mktexpk_ended; mktexpk_child->io = mktexpk_xio; set_chld(mktexpk_child); /* TODO: get DPI and FONTNAME from the log window, save to *dpi_ret, *filename_ret and *font_ret and return XFOPEN(name, FOPEN_R_MODE); */ return NULL; } } #else /* EXPERIMENTAL_DELAYED_MTKEXPK */ /* TODO: Probably a better approach would be as follows: 1. Read the postamble to get all font definitions. Then, set: kpse_set_program_enabled(kpse_any_glyph_format, False, kpse_src_compile); and run load_font() on all of the fonts, with an array in which to save the names that don't exist (that returned NULL). 2. Run load_font() again on the fonts that didn't exist in step (1) and display the output in a window. This somehow needs to be fork()ed so that the window itself remains responsive. (Maybe it's easier to call mktexpk directly on the command-line?) _________________________________________________________ | | | Xdvi is creating fonts, please be patient ... | | | | Font xyz (n of m) | | | | Errors: 0 [ Show Details ... ] | | | | [ ... some progress meter or busy indicator ... ] | | | | | | [ Exit xdvi ] [ Help ] | | | --------------------------------------------------------- This window can be shown before the main window is opened. */ /* Second try: PK/GF/... font within allowable size range */ /* NOTE SU: The problem with this is that it will already use the PK version of the fallback font (e.g. cmr10.600pk) if the PK version exists, so the Type1 version of the fallback won't get used at all. But maybe this isn't that severe, given that the font is grossly wrong anyway. */ name = kpse_find_glyph(font, (unsigned)(dpi + .5), kpse_any_glyph_format, &file_ret); if (name) { /* success */ *dpi_ret = file_ret.dpi; *filename_ret = name; *font_ret = file_ret.name; TRACE_T1((stderr, "Found pixel version: %s at %d dpi", file_ret.name, *dpi_ret)); return XFOPEN(name, FOPEN_R_MODE); } else if (resource.alt_font != NULL) { /* The strange thing about kpse_find_glyph() is that it won't create a PK version of alt_font if it doesn't already exist. So we invoke it explicitly a second time for that one. */ TRACE_T1((stderr, "Trying fallback")); #ifdef T1LIB if (resource.t1lib) { /* Third attempt: T1 version of fallback font */ *t1id = find_T1_font(resource.alt_font); if (*t1id >= 0) { TRACE_T1((stderr, "found fallback font for %s: %s", font, resource.alt_font)); *font_ret = xstrdup(resource.alt_font); return NULL; } TRACE_T1((stderr, "Type1 version of fallback font %s not found, trying pixel version", resource.alt_font)); } #endif /* T1LIB */ /* Forth attempt: PK version of fallback font */ name = kpse_find_glyph(resource.alt_font, (unsigned)(dpi + .5), kpse_any_glyph_format, &file_ret); if (name) { /* success */ TRACE_T1((stderr, "Success for PK version of fallback")); *dpi_ret = file_ret.dpi; *filename_ret = name; *font_ret = xstrdup(resource.alt_font); return XFOPEN(name, FOPEN_R_MODE); } else { TRACE_T1((stderr, "Failure for PK version of fallback")); } } #endif /* EXPERIMENTAL_DELAYED_MTKEXPK */ /* all other cases are failure */ TRACE_T1((stderr, "Failure")); return NULL; }