/*========================================================================*\ Copyright (c) 1990-2004 Paul Vojta 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. \*========================================================================*/ /* * GF font reading routines. * Public routines are read_GF_index and read_GF_char. */ #include "xdvi-config.h" #include "xdvi.h" #include "dvi-init.h" #include "util.h" #define PAINT_0 0 #define PAINT1 64 #define PAINT2 65 #define PAINT3 66 #define BOC 67 #define BOC1 68 #define EOC 69 #define SKIP0 70 #define SKIP1 71 #define SKIP2 72 #define SKIP3 73 #define NEW_ROW_0 74 #define NEW_ROW_MAX 238 #define XXX1 239 #define XXX2 240 #define XXX3 241 #define XXX4 242 #define YYY 243 #define NO_OP 244 #define CHAR_LOC 245 #define CHAR_LOC0 246 #define PRE 247 #define POST 248 #define POST_POST 249 #define GF_ID_BYTE 131 #define TRAILER 223 /* Trailing bytes at end of file */ static FILE *GF_file; static void expect(ubyte ch) { ubyte ch1 = get_byte(GF_file); if (ch1 != ch) XDVI_FATAL((stderr, "Bad GF file: %d expected, %d received.", ch, ch1)); } static void too_many_bits(ubyte ch) { XDVI_FATAL((stderr, "Too many bits found when loading character %d", ch)); } /* * Public routines */ static void read_GF_char(struct font *fontp, wide_ubyte ch) { struct glyph *g; ubyte cmnd; int min_m, max_m, min_n, max_n; bmUnitT *cp, *basep, *maxp; int bytes_wide; Boolean paint_switch; #define White False #define Black True Boolean new_row; int count; int word_weight; g = &fontp->glyph[ch]; GF_file = fontp->file; if (globals.debug & DBG_PK) printf("Loading gf char %d", ch); for (;;) { switch (cmnd = get_byte(GF_file)) { case XXX1: case XXX2: case XXX3: case XXX4: fseek(GF_file, (long)get_bytes(GF_file, (int)(cmnd - XXX1 + 1)), SEEK_CUR); continue; case YYY: (void)get_bytes(GF_file, 4); continue; case BOC: (void)get_bytes(GF_file, 4); /* skip character code */ (void)get_bytes(GF_file, 4); /* skip pointer to prev char */ min_m = get_lbytes(GF_file, 4); max_m = get_lbytes(GF_file, 4); g->x = -min_m; min_n = get_lbytes(GF_file, 4); g->y = max_n = get_lbytes(GF_file, 4); g->bitmap.w = max_m - min_m + 1; g->bitmap.h = max_n - min_n + 1; break; case BOC1: (void)get_byte(GF_file); /* skip character code */ g->bitmap.w = get_byte(GF_file); /* max_m - min_m */ g->x = g->bitmap.w - get_byte(GF_file); /* ditto - max_m */ ++g->bitmap.w; g->bitmap.h = get_byte(GF_file) + 1; g->y = get_byte(GF_file); break; default: XDVI_FATAL((stderr, "Bad BOC code: %d", cmnd)); } break; } paint_switch = White; if (globals.debug & DBG_PK) printf(", size=%dx%d, dvi_adv=%ld\n", g->bitmap.w, g->bitmap.h, g->dvi_adv); alloc_bitmap(&g->bitmap); cp = basep = (bmUnitT *) g->bitmap.bits; /* * Read character data into *basep */ bytes_wide = ROUNDUP((int)g->bitmap.w, BMBITS) * BMBYTES; maxp = ADD(basep, g->bitmap.h * bytes_wide); memset(g->bitmap.bits, 0, g->bitmap.h * bytes_wide); new_row = False; word_weight = BMBITS; for (;;) { count = -1; cmnd = get_byte(GF_file); if (cmnd < 64) count = cmnd; else if (cmnd >= NEW_ROW_0 && cmnd <= NEW_ROW_MAX) { count = cmnd - NEW_ROW_0; paint_switch = White; /* it'll be complemented later */ new_row = True; } else switch (cmnd) { case PAINT1: case PAINT2: case PAINT3: count = get_bytes(GF_file, (int)(cmnd - PAINT1 + 1)); break; case EOC: if (cp >= ADD(basep, bytes_wide)) too_many_bits(ch); return; case SKIP1: case SKIP2: case SKIP3: basep += get_bytes(GF_file, (int)(cmnd - SKIP0)) * bytes_wide / sizeof(bmUnitT); /* *((char **)&basep) += get_bytes(GF_file, WIDENINT cmnd - SKIP0) * bytes_wide; */ case SKIP0: new_row = True; paint_switch = White; break; case XXX1: case XXX2: case XXX3: case XXX4: fseek(GF_file, (long)get_bytes(GF_file, (int)(cmnd - XXX1 + 1)), SEEK_CUR); break; case YYY: (void)get_bytes(GF_file, 4); break; case NO_OP: break; default: XDVI_FATAL((stderr, "Bad command in GF file: %d", cmnd)); } /* end switch */ if (new_row) { basep += bytes_wide / sizeof(bmUnitT); /* *((char **)&basep) += bytes_wide; */ if (basep >= maxp || cp >= basep) too_many_bits(ch); cp = basep; word_weight = BMBITS; new_row = False; } if (count >= 0) { while (count) if (count <= word_weight) { #ifndef WORDS_BIGENDIAN if (paint_switch) *cp |= bit_masks[count] << (BMBITS - word_weight); #endif word_weight -= count; #ifdef WORDS_BIGENDIAN if (paint_switch) *cp |= bit_masks[count] << word_weight; #endif break; } else { if (paint_switch) #ifndef WORDS_BIGENDIAN *cp |= bit_masks[word_weight] << (BMBITS - word_weight); #else *cp |= bit_masks[word_weight]; #endif cp++; count -= word_weight; word_weight = BMBITS; } paint_switch = 1 - paint_switch; } } /* end for */ } void read_GF_index(struct font *fontp, wide_bool hushcs) { int hppp, vppp; ubyte ch, cmnd; struct glyph *g; long checksum; fontp->read_char = read_GF_char; GF_file = fontp->file; if (globals.debug & DBG_PK) printf("Reading GF pixel file %s\n", fontp->filename); /* * Find postamble. */ fseek(GF_file, (long)-4, SEEK_END); while (get_bytes(GF_file, 4) != ((unsigned long)TRAILER << 24 | TRAILER << 16 | TRAILER << 8 | TRAILER)) fseek(GF_file, (long)-5, SEEK_CUR); fseek(GF_file, (long)-5, SEEK_CUR); for (;;) { ch = get_byte(GF_file); if (ch != TRAILER) break; fseek(GF_file, (long)-2, SEEK_CUR); } if (ch != GF_ID_BYTE) XDVI_FATAL((stderr, "Bad end of font file %s", fontp->fontname)); fseek(GF_file, (long)-6, SEEK_CUR); expect(POST_POST); fseek(GF_file, get_lbytes(GF_file, 4), SEEK_SET); /* move to postamble */ /* * Read postamble. */ expect(POST); (void)get_bytes(GF_file, 4); /* pointer to last eoc + 1 */ (void)get_bytes(GF_file, 4); /* skip design size */ checksum = get_bytes(GF_file, 4); if (checksum != fontp->checksum && checksum != 0 && fontp->checksum != 0 && !hushcs) XDVI_WARNING((stderr, "Checksum mismatch (dvi = %lu, gf = %lu) in font file %s", fontp->checksum, checksum, fontp->filename)); hppp = get_lbytes(GF_file, 4); vppp = get_lbytes(GF_file, 4); if (hppp != vppp && (globals.debug & DBG_PK)) printf("Font has non-square aspect ratio %d:%d\n", vppp, hppp); (void)get_bytes(GF_file, 4); /* skip min_m */ (void)get_bytes(GF_file, 4); /* skip max_m */ (void)get_bytes(GF_file, 4); /* skip min_n */ (void)get_bytes(GF_file, 4); /* skip max_n */ /* * Prepare glyph array. */ fontp->glyph = xmalloc(256 * sizeof(struct glyph)); memset((char *)fontp->glyph, 0, 256 * sizeof(struct glyph)); /* * Read glyph directory. */ while ((cmnd = get_byte(GF_file)) != POST_POST) { int addr; ch = get_byte(GF_file); /* character code */ g = &fontp->glyph[ch]; switch (cmnd) { case CHAR_LOC: /* g->pxl_adv = get_lbytes(GF_file, 4); */ (void)get_bytes(GF_file, 4); (void)get_bytes(GF_file, 4); /* skip dy */ break; case CHAR_LOC0: /* g->pxl_adv = get_byte(GF_file) << 16; */ (void)get_byte(GF_file); break; default: XDVI_FATAL((stderr, "Non-char_loc command found in GF preamble: %d", cmnd)); } g->dvi_adv = fontp->dimconv * get_lbytes(GF_file, 4); addr = get_bytes(GF_file, 4); if (addr != -1) g->addr = addr; if (globals.debug & DBG_PK) printf("Read GF glyph for character %d; dy = %ld, addr = %x\n", ch, g->dvi_adv, addr); } }