/* * ttfaux.c * * This file is part of the ttf2pk package. * * Copyright 1997-1999 by * Frederic Loyer * Werner Lemberg */ #include #include #include #include "freetype.h" #include "extend/ftxkern.h" /* we are in the FreeType package tree */ #include "extend/ftxpost.h" #include "extend/ftxopen.h" #include "ttf2tfm.h" #include "newobj.h" #include "ligkern.h" #include "ttfenc.h" #include "tfmaux.h" #include "errormsg.h" #include "ttfaux.h" #include "filesrch.h" #define Macintosh_platform 1 #define Macintosh_encoding 0 #define Microsoft_platform 3 #define Microsoft_Unicode_encoding 1 #define SCRIPT_kana MAKE_TT_TAG('k', 'a', 'n', 'a') #define SCRIPT_hani MAKE_TT_TAG('h', 'a', 'n', 'i') #define SCRIPT_hang MAKE_TT_TAG('h', 'a', 'n', 'g') #define LANGUAGE_JAN MAKE_TT_TAG('J', 'A', 'N', ' ') #define LANGUAGE_CHN MAKE_TT_TAG('C', 'H', 'N', ' ') #define LANGUAGE_KOR MAKE_TT_TAG('K', 'O', 'R', ' ') #define FEATURE_vert MAKE_TT_TAG('v', 'e', 'r', 't') extern char progname[]; char *real_ttfname; TT_Engine engine; TT_Face face; TT_Instance instance; TT_Glyph glyph; TT_Outline outline; TT_CharMap char_map; TT_Matrix matrix1, matrix2; TT_Big_Glyph_Metrics metrics; TT_Face_Properties properties; TT_BBox bbox; TT_Kerning directory; TT_Post post; TTO_GSUBHeader gsub_; TTO_GSUBHeader *gsub; Boolean has_gsub; static void readttf_kern(Font *fnt) { register kern *nk; register ttfinfo *ti; TT_Kern_0_Pair* pairs0; TT_Error error; unsigned int i, j; if ((error = TT_Get_Kerning_Directory(face, &directory))) oops("Cannot get kerning directory (error code = 0x%x).", error); if (directory.nTables == 0) return; for (i = 0; i < directory.nTables; i++) { if ((error = TT_Load_Kerning_Table(face, i))) oops("Cannot load kerning table (error code = 0x%x).", error); switch (directory.tables[i].format) { case 0: pairs0 = directory.tables[i].t.kern0.pairs; for (j = 0; j < directory.tables[i].t.kern0.nPairs; j++, pairs0++) { ti = findglyph(pairs0->left, fnt->charlist); if (ti == NULL) warning("kern char not found"); else { nk = newkern(); nk->succ = findglyph(pairs0->right, fnt->charlist)->adobename; nk->delta = transform(pairs0->value * 1000 / fnt->units_per_em, 0, fnt->efactor, fnt->slant); nk->next = ti->kerns; ti->kerns = nk; } } return; /* we stop after the first format 0 kerning table */ default: break; } } return; } void readttf(Font *fnt, Boolean quiet, Boolean only_range) { TT_Error error; ttfinfo *ti, *Ti; long Num, index; unsigned int i, j; long k, max_k; unsigned short num_cmap; unsigned short cmap_plat, cmap_enc; int index_array[257]; static Boolean initialized = False; TT_UShort in_string[2]; TTO_GSUB_String in, out; TT_UShort script_index, language_index, feature_index; TT_UShort req_feature_index = 0xFFFF; /* * We allocate a placeholder boundary and the `.notdef' character. */ if (!only_range) { ti = newchar(fnt); ti->charcode = -1; ti->adobename = ".notdef"; ti = newchar(fnt); ti->charcode = -1; ti->adobename = "||"; /* boundary character name */ } /* * Initialize FreeType engine. */ if (!initialized) { if ((error = TT_Init_FreeType(&engine))) oops("Cannot initialize engine (error code = 0x%x).", error); if ((error = TT_Init_Kerning_Extension(engine))) oops("Cannot initialize kerning (error code = 0x%x).", error); if (fnt->PSnames) if ((error = TT_Init_Post_Extension(engine))) oops("Cannot initialize PS name support (error code = 0x%x).", error); if (fnt->rotate) if ((error = TT_Init_GSUB_Extension(engine))) oops("Cannot initialize GSUB support (error code = 0x%x).", error); /* * Load face. */ real_ttfname = TeX_search_ttf_file(&(fnt->ttfname)); if (!real_ttfname) oops("Cannot find `%s'.", fnt->ttfname); if ((error = TT_Open_Face(engine, real_ttfname, &face))) oops("Cannot open `%s'.", real_ttfname); /* * Get face properties and allocate preload arrays. */ TT_Get_Face_Properties(face, &properties); /* * Now we try to open the proper font in a collection. */ if (fnt->fontindex != 0) { if (properties.num_Faces == 1) { warning("This isn't a TrueType collection.\n" "Parameter `-f' is ignored."); fnt->fontindex = 0; fnt->fontindexparam = NULL; } else { TT_Close_Face(face); if ((error = TT_Open_Collection(engine, real_ttfname, fnt->fontindex, &face))) oops("Cannot open font %lu in TrueType Collection `%s'.", fnt->fontindex, real_ttfname); } } /* * Create instance. */ if ((error = TT_New_Instance(face, &instance))) oops("Cannot create instance for `%s' (error code = 0x%x).", real_ttfname, error); /* * We use a dummy glyph size of 10pt. */ if ((error = TT_Set_Instance_CharSize(instance, 10 * 64))) oops("Cannot set character size (error code = 0x%x).", error); matrix1.xx = (TT_Fixed)(floor(fnt->efactor * 1024) * (1L<<16)/1024); matrix1.xy = (TT_Fixed)(floor(fnt->slant * 1024) * (1L<<16)/1024); matrix1.yx = (TT_Fixed)0; matrix1.yy = (TT_Fixed)(1L<<16); if (fnt->rotate) { matrix2.xx = 0; matrix2.yx = 1L << 16; matrix2.xy = -matrix2.yx; matrix2.yy = matrix2.xx; } if ((error = TT_Set_Instance_Transform_Flags( instance, fnt->rotate ? 1 : 0, fnt->efactor != 1.0 ? 1 : 0))) oops("Cannot set transform flags (error code = 0x%x).", error); /* * Create glyph container. */ if ((error = TT_New_Glyph(face, &glyph))) oops("Cannot create glyph container (error code = 0x%x).", error); fnt->units_per_em = properties.header->Units_Per_EM; fnt->fixedpitch = properties.postscript->isFixedPitch; fnt->italicangle = properties.postscript->italicAngle / 65536.0; if (fnt->PSnames != Only) { num_cmap = properties.num_CharMaps; for (i = 0; i < num_cmap; i++) { if ((error = TT_Get_CharMap_ID(face, i, &cmap_plat, &cmap_enc))) oops("Cannot query cmap (error code = 0x%x).", error); if (cmap_plat == fnt->pid && cmap_enc == fnt->eid) break; } if (i == num_cmap) { fprintf(stderr, "%s: ERROR: Invalid platform and/or encoding ID.\n", progname); if (num_cmap == 1) fprintf(stderr, " The only valid PID/EID pair is"); else fprintf(stderr, " Valid PID/EID pairs are:\n"); for (i = 0; i < num_cmap; i++) { TT_Get_CharMap_ID(face, i, &cmap_plat, &cmap_enc); fprintf(stderr, " (%i,%i)\n", cmap_plat, cmap_enc); } fprintf(stderr, "\n"); exit(1); } if ((error = TT_Get_CharMap(face, i, &char_map))) oops("Cannot load cmap (error code = 0x%x).", error); } if (fnt->PSnames) { if ((error = TT_Load_PS_Names(face, &post))) oops("Cannot load TrueType PS names (error code = 0x%x).", error); } else if (cmap_plat == Microsoft_platform && cmap_enc == Microsoft_Unicode_encoding) set_encoding_scheme(encUnicode, fnt); else if (cmap_plat == Macintosh_platform && cmap_enc == Macintosh_encoding) set_encoding_scheme(encMac, fnt); else set_encoding_scheme(encFontSpecific, fnt); if (fnt->rotate) { gsub = &gsub_; error = TT_Load_GSUB_Table(face, gsub, NULL); if (!error) has_gsub = True; else if (error != TT_Err_Table_Missing) warning("Cannot load GSUB table (error code = 0x%x).", error); else warning("No GSUB data available " "for vertical glyph presentation forms."); /* we check for the `vert' feature in Chinese, Japanese, and Korean */ error = TT_GSUB_Select_Script(gsub, SCRIPT_kana, &script_index); if (error) goto check_hani; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, 0xFFFF, &feature_index); if (error) { error = TT_GSUB_Select_Language(gsub, LANGUAGE_JAN, script_index, &language_index, &req_feature_index); if (error) goto check_hani; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, language_index, &feature_index); if (error) goto check_hani; else goto Done; } else goto Done; check_hani: error = TT_GSUB_Select_Script(gsub, SCRIPT_hani, &script_index); if (error) goto check_hang; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, 0xFFFF, &feature_index); if (error) { error = TT_GSUB_Select_Language(gsub, LANGUAGE_CHN, script_index, &language_index, &req_feature_index); if (error) goto check_hang; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, language_index, &feature_index); if (error) goto check_hang; else goto Done; } else goto Done; check_hang: error = TT_GSUB_Select_Script(gsub, SCRIPT_hang, &script_index); if (error) goto Done; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, 0xFFFF, &feature_index); if (error) { error = TT_GSUB_Select_Language(gsub, LANGUAGE_KOR, script_index, &language_index, &req_feature_index); if (error) goto Done; error = TT_GSUB_Select_Feature(gsub, FEATURE_vert, script_index, language_index, &feature_index); } Done: if (error) { warning("There is no data for vertical typesetting in GSUB table."); has_gsub = False; } if (req_feature_index != 0xFFFF) TT_GSUB_Add_Feature(gsub, req_feature_index, ALL_GLYPHS); TT_GSUB_Add_Feature(gsub, feature_index, ALL_GLYPHS); in.length = 1; in.pos = 0; in.string = in_string; in.properties = NULL; out.pos = 0; out.allocated = 0; out.string = NULL; out.properties = NULL; } initialized = True; } if (!quiet) { if (only_range) printf("\n\n%s:\n", fnt->fullname); printf("\n"); printf("Glyph Code Glyph Name "); printf("Width llx lly urx ury\n"); printf("---------------------------------------"); printf("---------------------------------\n"); } /* * We load only glyphs with a valid cmap entry. Nevertheless, for * the default mapping, we use the first 256 glyphs addressed by * ascending code points, followed by glyphs not in the cmap. * * If we compute a range, we take the character codes given in * the fnt->sf_code array. * * If the -N flag is set, no cmap is used at all. Instead, the * first 256 glyphs (with a valid PS name) are used for the default * mapping. */ if (!only_range) for (i = 0; i < 257; i++) index_array[i] = 0; else for (i = 0; i < 256; i++) fnt->inencptrs[i] = 0; j = 0; if (fnt->PSnames == Only) max_k = properties.num_Glyphs - 1; else max_k = only_range ? 0xFF : 0xFFFF; for (k = 0; k <= max_k; k++) { char *an; if (fnt->PSnames != Only) { if (only_range) { index = fnt->sf_code[k]; if (index < 0) continue; j = k; } else index = k; Num = TT_Char_Index(char_map, index); /* now we try to get a vertical glyph form */ if (has_gsub) { in_string[0] = Num; error = TT_GSUB_Apply_String(gsub, &in, &out); if (error && error != TTO_Err_Not_Covered) warning("Cannot get the vertical glyph form for glyph index %d.", Num); else Num = out.string[0]; } if (Num < 0) oops("Failure on cmap mapping from %s.", fnt->ttfname); if (Num == 0) continue; if (!only_range) if (Num <= 256) index_array[Num] = 1; } else { Num = k; index = 0; } error = TT_Load_Glyph(instance, glyph, Num, 0); if (!error) error = TT_Get_Glyph_Big_Metrics(glyph, &metrics); if (!error) error = TT_Get_Glyph_Outline(glyph, &outline); if (!error) { if (fnt->efactor != 1.0 || fnt->slant != 0.0 ) TT_Transform_Outline(&outline, &matrix1); if (fnt->rotate) TT_Transform_Outline(&outline, &matrix2); } if (!error) error = TT_Get_Outline_BBox(&outline, &bbox); /* we need the non- grid-fitted bbox */ if (!error) { if (fnt->PSnames) (void)TT_Get_PS_Name(face, Num, &an); else an = code_to_adobename(index); /* ignore characters not usable for typesetting with TeX */ if (strcmp(an, ".notdef") == 0) continue; if (strcmp(an, ".null") == 0) continue; if (strcmp(an, "nonmarkingreturn") == 0) continue; ti = newchar(fnt); ti->charcode = index; ti->glyphindex = Num; ti->adobename = an; ti->llx = bbox.xMin * 1000 / fnt->units_per_em; ti->lly = bbox.yMin * 1000 / fnt->units_per_em; ti->urx = bbox.xMax * 1000 / fnt->units_per_em; ti->ury = bbox.yMax * 1000 / fnt->units_per_em; /* * We must now shift the rotated character both horizontally * and vertically. The vertical amount is 25% by default. */ if (fnt->rotate) { ti->llx += (metrics.vertBearingY - bbox.xMin) * 1000 / fnt->units_per_em; ti->lly -= 1000 * fnt->y_offset; ti->urx += (metrics.vertBearingY - bbox.xMin) * 1000 / fnt->units_per_em; ti->ury -= 1000 * fnt->y_offset; } /* * We need to avoid negative heights or depths. They break accents * in math mode, among other things. */ if (ti->lly > 0) ti->lly = 0; if (ti->ury < 0) ti->ury = 0; if (fnt->rotate) ti->width = metrics.vertAdvance * 1000 / fnt->units_per_em; else ti->width = transform(metrics.horiAdvance * 1000 / fnt->units_per_em, 0, fnt->efactor, fnt->slant); if (!quiet) printf("%5ld %04lx %-25s %5d % 5d,% 5d -- % 5d,% 5d\n", Num, index, ti->adobename, ti->width, ti->llx, ti->lly, ti->urx, ti->ury); if (j < 256) { fnt->inencptrs[j] = ti; ti->incode = j; } j++; } } /* * Now we load glyphs without a cmap entry, provided some slots are * still free -- we skip this if we have to compute a range or use * PS names. */ if (!only_range && !fnt->PSnames) { for (i = 1; i <= properties.num_Glyphs; i++) { char *an; if (index_array[i] == 0) { error = TT_Load_Glyph(instance, glyph, i, 0); if (!error) error = TT_Get_Glyph_Big_Metrics(glyph, &metrics); if (!error) error = TT_Get_Glyph_Outline(glyph, &outline); if (!error) error = TT_Get_Outline_BBox(&outline, &bbox); if (!error) { an = code_to_adobename(i | 0x10000); ti = newchar(fnt); ti->charcode = i | 0x10000; ti->glyphindex = i; ti->adobename = an; ti->llx = bbox.xMin * 1000 / fnt->units_per_em; ti->lly = bbox.yMin * 1000 / fnt->units_per_em; ti->urx = bbox.xMax * 1000 / fnt->units_per_em; ti->ury = bbox.yMax * 1000 / fnt->units_per_em; if (ti->lly > 0) ti->lly = 0; if (ti->ury < 0) ti->ury = 0; ti->width = transform(metrics.horiAdvance*1000 / fnt->units_per_em, 0, fnt->efactor, fnt->slant); if (!quiet) printf("%5d %-25s %5d % 5d,% 5d -- % 5d,% 5d\n", i, ti->adobename, ti->width, ti->llx, ti->lly, ti->urx, ti->ury); if (j < 256) { fnt->inencptrs[j] = ti; ti->incode = j; } else break; j++; } } } } /* Finally, we construct a `Germandbls' glyph if necessary */ if (!only_range) { if (NULL == findadobe("Germandbls", fnt->charlist) && NULL != (Ti = findadobe("S", fnt->charlist))) { pcc *np, *nq; ti = newchar(fnt); ti->charcode = properties.num_Glyphs | 0x10000; ti->glyphindex = properties.num_Glyphs; ti->adobename = "Germandbls"; ti->width = Ti->width << 1; ti->llx = Ti->llx; ti->lly = Ti->lly; ti->urx = Ti->width + Ti->urx; ti->ury = Ti->ury; ti->kerns = Ti->kerns; np = newpcc(); np->partname = "S"; nq = newpcc(); nq->partname = "S"; nq->xoffset = Ti->width; np->next = nq; ti->pccs = np; ti->constructed = True; if (!quiet) printf("* %-25s %5d % 5d,% 5d -- % 5d,% 5d\n", ti->adobename, ti->width, ti->llx, ti->lly, ti->urx, ti->ury); } } /* kerning between subfonts isn't available */ if (!only_range) readttf_kern(fnt); } /* end */