/* * ttflib.c * * This file is part of the ttf2pk package. * * Copyright 1997-1999, 2000 by * Loyer Frederic * Werner Lemberg */ #include #include #include #include /* libc ANSI */ #include #include "pklib.h" /* for the `byte' type */ #include "freetype.h" #include "ttfenc.h" #include "ttflib.h" #include "errormsg.h" #include "newobj.h" #include "ttf2tfm.h" #include "ftxpost.h" #include "ftxopen.h" #define Macintosh_platform 1 #define Macintosh_encoding 0 #define Microsoft_platform 3 #define Microsoft_Symbol_encoding 0 #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') TT_Engine engine; TT_Face face; TT_Instance instance; TT_Glyph glyph; TT_CharMap char_map; TT_Outline outline; TT_Face_Properties properties; TT_BBox bbox; TT_Post post; TT_Raster_Map Bit, Bit2; void *Bitp, *Bit2p; int dpi; int ptsize; int x_offset, y_offset; int ppem; TT_Big_Glyph_Metrics metrics; TT_Matrix matrix1, matrix2; TTO_GSUBHeader gsub_; TTO_GSUBHeader *gsub; TT_UShort in_string[2]; TTO_GSUB_String in, out; Boolean has_gsub; static void SetRasterArea(int quiet) { int temp1_x, temp1_y, temp2_x, temp2_y; temp1_x = bbox.xMin / 64; /* scaling F16.6 -> int */ temp1_y = bbox.yMin / 64; temp2_x = (bbox.xMax + 63) / 64; temp2_y = (bbox.yMax + 63) / 64; x_offset = 5 - temp1_x; y_offset = 5 - temp1_y; if (!quiet) printf(" off = (%d, %d)", x_offset, y_offset); #if 0 x_offset = y_offset = 0; #endif if (!quiet) printf(" bbox = (%d, %d) <-> (%d, %d)\n", temp1_x, temp1_y, temp2_x, temp2_y); Bit.rows = temp2_y - temp1_y + 10; Bit.width = temp2_x - temp1_x + 10; Bit.cols = (Bit.width + 7) / 8; /* convert to # of bytes */ Bit.flow = TT_Flow_Up; Bit.size = Bit.rows * Bit.cols; /* number of bytes in buffer */ /* * We allocate one more row to have valid pointers for comparison * purposes in pklib.c, making `gcc -fbounds-checking' happy. */ if (Bitp) free(Bitp); Bitp = mymalloc(Bit.size + Bit.cols); Bit.bitmap = Bitp; Bit2 = Bit; if (Bit2p) free(Bit2p); Bit2p = mymalloc(Bit.size + Bit.cols); Bit2.bitmap = Bit2p; } static void FlipBit(void) { int y; char *p1, *p2; p1 = (char *)Bit.bitmap; p2 = (char *)Bit2.bitmap + Bit2.cols * (Bit2.rows - 1); for (y = 0; y < Bit.rows; y++) { memcpy(p2, p1, Bit.cols); p1 += Bit.cols; p2 -= Bit.cols; } } #if 0 static void Output(TT_Raster_Map Bit) { int x; int y; int i; char *p, b; p = Bit.bitmap; printf("====\n"); for (y = 0; y < Bit.rows; y++) { printf("%3d:", y); for (x = 0; x < Bit.cols; x++) { b = *p++; for(i = 0x80; i; i >>= 1) printf((b & i) ? "x" : "."); } printf("\n"); } } #endif /* 0 */ void TTFopen(char *filename, Font *fnt, int new_dpi, int new_ptsize, Boolean quiet) { unsigned short i, num_cmap; unsigned short cmap_plat; unsigned short cmap_enc; TT_Error error; TT_UShort script_index, language_index, feature_index; TT_UShort req_feature_index = 0xFFFF; dpi = new_dpi; ptsize = new_ptsize; if ((error = TT_Init_FreeType(&engine))) oops("Cannot initialize FreeType engine (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. */ error = TT_Open_Face(engine, filename, &face); if (error) oops("Cannot open `%s'.", filename); /* * Get face properties and allocate preloaded 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 `Fontindex' is ignored."); else { TT_Close_Face(face); if ((error = TT_Open_Collection(engine, filename, fnt->fontindex, &face))) oops("Cannot open font %lu in TrueType Collection `%s'.", fnt->fontindex, filename); } } /* * Create instance. */ if ((error = TT_New_Instance(face, &instance))) oops("Cannot create instance for `%s' (error code = 0x%x).", filename, error); if ((error = TT_Set_Instance_Resolutions(instance, dpi, dpi))) oops("Cannot set device resolutions (error code = 0x%x)."); if ((error = TT_Set_Instance_CharSize(instance, ptsize * 64))) oops("Cannot set character size (error code = 0x%x).", error); ppem = (dpi * ptsize + 36) / 72; if (!quiet) printf("dpi = %d, ptsize = %d, ppem = %d\n\n", dpi, ptsize, ppem); matrix1.xx = (TT_Fixed)(floor(fnt->efactor * 1024) * (1<<16)/1024); matrix1.xy = (TT_Fixed)(floor(fnt->slant * 1024) * (1<<16)/1024); matrix1.yx = (TT_Fixed)0; matrix1.yy = (TT_Fixed)(1<<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)."); 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) oops("Invalid platform and/or encoding ID."); 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; } } static TT_Error LoadTrueTypeChar(Font *fnt, int idx, Boolean hint, Boolean quiet) { TT_Error error; int flags; flags = TTLOAD_SCALE_GLYPH; if (hint) flags |= TTLOAD_HINT_GLYPH; error = TT_Load_Glyph(instance, glyph, idx, flags); 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 (fnt->rotate) TT_Translate_Outline(&outline, metrics.vertBearingY - bbox.xMin, -fnt->y_offset * ppem * 64); if (!error) error = TT_Get_Outline_BBox(&outline, &bbox); if (!error) SetRasterArea(quiet); return error; } Boolean TTFprocess(Font *fnt, long Code, byte **bitmap, int *width, int *height, int *hoff, int *voff, Boolean hinting, Boolean quiet) { int Num; TT_Error error; if (!bitmap || !width || !height || !hoff || !voff) oops("Invalid parameter in call to TTFprocess()"); if (Code >= 0x1000000) Num = Code & 0xFFFFFF; else { Num = TT_Char_Index(char_map, Code); 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 ((error = LoadTrueTypeChar(fnt, Num, hinting, quiet)) == TT_Err_Ok) { memset(Bit.bitmap, 0, Bit.size); TT_Get_Glyph_Bitmap(glyph, &Bit, x_offset * 64, y_offset * 64); FlipBit(); *bitmap = Bit2.bitmap; *width = Bit2.width; *height = Bit2.rows; *hoff = x_offset; *voff = y_offset; /* *voff = Bit2.rows - y_offset; */ /* printf("%D %d\n", *hoff, *voff); */ /* Output(Bit2); */ return True; } else return False; } /* * We collect first all glyphs addressed via the cmap. Then we fill the * array up with glyphs not in the cmap. * * If PSnames is set to `Only', we get the first 256 glyphs which have * names different from `.notdef', `.null', and `nonmarkingreturn'. * * For nicer output, we return the glyph names in an encoding array. */ encoding * TTFget_first_glyphs(Font *fnt, long *array) { unsigned int i, j, Num; unsigned int index_array[257]; /* we ignore glyph index 0 */ char *n; encoding *e = (encoding *)mymalloc(sizeof (encoding)); if (!array) oops("Invalid parameter in call to TTFget_first_glyphs()"); for (i = 0; i < 257; i++) index_array[i] = 0; j = 0; if (fnt->PSnames != Only) { for (i = 0; i <= 0x16FFFF; i++) { Num = TT_Char_Index(char_map, i); if (Num < 0) oops("cmap mapping failure."); if (Num == 0) continue; if (Num <= 256) index_array[Num] = 1; if (fnt->PSnames) (void)TT_Get_PS_Name(face, Num, &n); else n = code_to_adobename(i); if (strcmp(n, ".notdef") == 0) continue; if (strcmp(n, ".null") == 0) continue; if (strcmp(n, "nonmarkingreturn") == 0) continue; if (j < 256) { array[j] = i; e->vec[j] = n; } else return e; j++; } if (!fnt->PSnames) { for (i = 1; i < properties.num_Glyphs; i++) { if (index_array[i] == 0) { if (j < 256) { array[j] = i | 0x1000000; e->vec[j] = code_to_adobename(i | 0x1000000); } else return e; j++; } } } } else { for (i = 0; i < properties.num_Glyphs; i++) { char *n; (void)TT_Get_PS_Name(face, i, &n); if (strcmp(n, ".notdef") == 0) continue; if (strcmp(n, ".null") == 0) continue; if (strcmp(n, "nonmarkingreturn") == 0) continue; if (j < 256) { array[j] = i | 0x1000000; e->vec[j] = n; } else return e; j++; } } return NULL; /* never reached */ } /* * This routine fills `array' with the subfont character codes; * additionally, it tests for valid glyph indices. */ void TTFget_subfont(Font *fnt, long *array) { int i, j, Num; if (!fnt || !array) oops("Invalid parameter in call to TTFget_subfont()"); for (i = 0; i <= 0xFF; i++) { j = fnt->sf_code[i]; if (j < 0) array[i] = j; else { Num = TT_Char_Index(char_map, j); if (Num < 0) oops("cmap mapping failure."); else array[i] = j; } } } long TTFsearch_PS_name(char *name) { unsigned int i; char *n; for (i = 0; i < properties.num_Glyphs; i++) { TT_Get_PS_Name(face, i, &n); if (strcmp(name, n) == 0) break; } if (i == properties.num_Glyphs) return -1L; else return (long)i; } /* end */