forked from KolibriOS/kolibrios
1166 lines
29 KiB
C
1166 lines
29 KiB
C
#include "fitz.h"
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#include "mupdf.h"
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_XFREE86_H
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static fz_error pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_xref *xref, fz_obj *dict, char *collection, char *basefont);
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static char *base_font_names[14][7] =
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{
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{ "Courier", "CourierNew", "CourierNewPSMT", NULL },
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{ "Courier-Bold", "CourierNew,Bold", "Courier,Bold",
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"CourierNewPS-BoldMT", "CourierNew-Bold", NULL },
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{ "Courier-Oblique", "CourierNew,Italic", "Courier,Italic",
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"CourierNewPS-ItalicMT", "CourierNew-Italic", NULL },
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{ "Courier-BoldOblique", "CourierNew,BoldItalic", "Courier,BoldItalic",
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"CourierNewPS-BoldItalicMT", "CourierNew-BoldItalic", NULL },
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{ "Helvetica", "ArialMT", "Arial", NULL },
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{ "Helvetica-Bold", "Arial-BoldMT", "Arial,Bold", "Arial-Bold",
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"Helvetica,Bold", NULL },
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{ "Helvetica-Oblique", "Arial-ItalicMT", "Arial,Italic", "Arial-Italic",
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"Helvetica,Italic", "Helvetica-Italic", NULL },
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{ "Helvetica-BoldOblique", "Arial-BoldItalicMT",
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"Arial,BoldItalic", "Arial-BoldItalic",
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"Helvetica,BoldItalic", "Helvetica-BoldItalic", NULL },
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{ "Times-Roman", "TimesNewRomanPSMT", "TimesNewRoman",
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"TimesNewRomanPS", NULL },
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{ "Times-Bold", "TimesNewRomanPS-BoldMT", "TimesNewRoman,Bold",
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"TimesNewRomanPS-Bold", "TimesNewRoman-Bold", NULL },
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{ "Times-Italic", "TimesNewRomanPS-ItalicMT", "TimesNewRoman,Italic",
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"TimesNewRomanPS-Italic", "TimesNewRoman-Italic", NULL },
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{ "Times-BoldItalic", "TimesNewRomanPS-BoldItalicMT",
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"TimesNewRoman,BoldItalic", "TimesNewRomanPS-BoldItalic",
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"TimesNewRoman-BoldItalic", NULL },
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{ "Symbol", NULL },
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{ "ZapfDingbats", NULL }
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};
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static int is_dynalab(char *name)
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{
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if (strstr(name, "HuaTian"))
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return 1;
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if (strstr(name, "MingLi"))
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return 1;
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if ((strstr(name, "DF") == name) || strstr(name, "+DF"))
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return 1;
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if ((strstr(name, "DLC") == name) || strstr(name, "+DLC"))
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return 1;
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return 0;
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}
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static int strcmp_ignore_space(char *a, char *b)
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{
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while (1)
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{
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while (*a == ' ')
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a++;
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while (*b == ' ')
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b++;
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if (*a != *b)
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return 1;
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if (*a == 0)
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return *a != *b;
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if (*b == 0)
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return *a != *b;
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a++;
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b++;
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}
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}
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static char *clean_font_name(char *fontname)
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{
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int i, k;
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for (i = 0; i < 14; i++)
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for (k = 0; base_font_names[i][k]; k++)
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if (!strcmp_ignore_space(base_font_names[i][k], fontname))
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return base_font_names[i][0];
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return fontname;
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}
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/*
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* FreeType and Rendering glue
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*/
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enum { UNKNOWN, TYPE1, TRUETYPE };
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static int ft_kind(FT_Face face)
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{
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/// STUB ///
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//const char *kind = FT_Get_X11_Font_Format(face);
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const char *kind = "TrueType";
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if (!strcmp(kind, "TrueType"))
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return TRUETYPE;
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if (!strcmp(kind, "Type 1"))
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return TYPE1;
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if (!strcmp(kind, "CFF"))
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return TYPE1;
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if (!strcmp(kind, "CID Type 1"))
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return TYPE1;
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return UNKNOWN;
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}
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static int ft_is_bold(FT_Face face)
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{
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return face->style_flags & FT_STYLE_FLAG_BOLD;
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}
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static int ft_is_italic(FT_Face face)
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{
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return face->style_flags & FT_STYLE_FLAG_ITALIC;
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}
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static int ft_char_index(FT_Face face, int cid)
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{
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int gid = FT_Get_Char_Index(face, cid);
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if (gid == 0)
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gid = FT_Get_Char_Index(face, 0xf000 + cid);
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/* some chinese fonts only ship the similarly looking 0x2026 */
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if (gid == 0 && cid == 0x22ef)
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gid = FT_Get_Char_Index(face, 0x2026);
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return gid;
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}
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static int ft_cid_to_gid(pdf_font_desc *fontdesc, int cid)
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{
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if (fontdesc->to_ttf_cmap)
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{
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cid = pdf_lookup_cmap(fontdesc->to_ttf_cmap, cid);
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return ft_char_index(fontdesc->font->ft_face, cid);
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}
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if (fontdesc->cid_to_gid)
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return fontdesc->cid_to_gid[cid];
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return cid;
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}
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int
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pdf_font_cid_to_gid(pdf_font_desc *fontdesc, int cid)
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{
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if (fontdesc->font->ft_face)
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return ft_cid_to_gid(fontdesc, cid);
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return cid;
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}
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static int ft_width(pdf_font_desc *fontdesc, int cid)
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{
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int gid = ft_cid_to_gid(fontdesc, cid);
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int fterr = FT_Load_Glyph(fontdesc->font->ft_face, gid,
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FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP | FT_LOAD_IGNORE_TRANSFORM);
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if (fterr)
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{
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fz_warn("freetype load glyph (gid %d): %s", gid, ft_error_string(fterr));
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return 0;
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}
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return ((FT_Face)fontdesc->font->ft_face)->glyph->advance.x;
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}
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static int lookup_mre_code(char *name)
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{
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int i;
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for (i = 0; i < 256; i++)
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if (pdf_mac_roman[i] && !strcmp(name, pdf_mac_roman[i]))
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return i;
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return -1;
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}
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/*
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* Load font files.
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*/
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static fz_error
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pdf_load_builtin_font(pdf_font_desc *fontdesc, char *fontname)
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{
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fz_error error;
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unsigned char *data;
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unsigned int len;
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data = pdf_find_builtin_font(fontname, &len);
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if (!data)
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return fz_throw("cannot find builtin font: '%s'", fontname);
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error = fz_new_font_from_memory(&fontdesc->font, data, len, 0);
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if (error)
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return fz_rethrow(error, "cannot load freetype font from memory");
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if (!strcmp(fontname, "Symbol") || !strcmp(fontname, "ZapfDingbats"))
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fontdesc->flags |= PDF_FD_SYMBOLIC;
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return fz_okay;
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}
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static fz_error
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pdf_load_substitute_font(pdf_font_desc *fontdesc, int mono, int serif, int bold, int italic)
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{
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fz_error error;
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unsigned char *data;
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unsigned int len;
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data = pdf_find_substitute_font(mono, serif, bold, italic, &len);
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if (!data)
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return fz_throw("cannot find substitute font");
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error = fz_new_font_from_memory(&fontdesc->font, data, len, 0);
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if (error)
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return fz_rethrow(error, "cannot load freetype font from memory");
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fontdesc->font->ft_substitute = 1;
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fontdesc->font->ft_bold = bold && !ft_is_bold(fontdesc->font->ft_face);
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fontdesc->font->ft_italic = italic && !ft_is_italic(fontdesc->font->ft_face);
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return fz_okay;
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}
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static fz_error
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pdf_load_substitute_cjk_font(pdf_font_desc *fontdesc, int ros, int serif)
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{
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fz_error error;
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unsigned char *data;
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unsigned int len;
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data = pdf_find_substitute_cjk_font(ros, serif, &len);
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if (!data)
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return fz_throw("cannot find builtin CJK font");
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error = fz_new_font_from_memory(&fontdesc->font, data, len, 0);
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if (error)
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return fz_rethrow(error, "cannot load builtin CJK font");
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fontdesc->font->ft_substitute = 1;
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return fz_okay;
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}
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static fz_error
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pdf_load_system_font(pdf_font_desc *fontdesc, char *fontname, char *collection)
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{
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fz_error error;
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int bold = 0;
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int italic = 0;
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int serif = 0;
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int mono = 0;
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if (strstr(fontname, "Bold"))
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bold = 1;
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if (strstr(fontname, "Italic"))
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italic = 1;
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if (strstr(fontname, "Oblique"))
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italic = 1;
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if (fontdesc->flags & PDF_FD_FIXED_PITCH)
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mono = 1;
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if (fontdesc->flags & PDF_FD_SERIF)
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serif = 1;
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if (fontdesc->flags & PDF_FD_ITALIC)
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italic = 1;
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if (fontdesc->flags & PDF_FD_FORCE_BOLD)
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bold = 1;
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if (collection)
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{
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if (!strcmp(collection, "Adobe-CNS1"))
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return pdf_load_substitute_cjk_font(fontdesc, PDF_ROS_CNS, serif);
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else if (!strcmp(collection, "Adobe-GB1"))
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return pdf_load_substitute_cjk_font(fontdesc, PDF_ROS_GB, serif);
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else if (!strcmp(collection, "Adobe-Japan1"))
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return pdf_load_substitute_cjk_font(fontdesc, PDF_ROS_JAPAN, serif);
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else if (!strcmp(collection, "Adobe-Korea1"))
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return pdf_load_substitute_cjk_font(fontdesc, PDF_ROS_KOREA, serif);
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return fz_throw("unknown cid collection: %s", collection);
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}
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error = pdf_load_substitute_font(fontdesc, mono, serif, bold, italic);
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if (error)
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return fz_rethrow(error, "cannot load substitute font");
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return fz_okay;
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}
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static fz_error
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pdf_load_embedded_font(pdf_font_desc *fontdesc, pdf_xref *xref, fz_obj *stmref)
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{
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fz_error error;
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fz_buffer *buf;
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error = pdf_load_stream(&buf, xref, fz_to_num(stmref), fz_to_gen(stmref));
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if (error)
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return fz_rethrow(error, "cannot load font stream (%d %d R)", fz_to_num(stmref), fz_to_gen(stmref));
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error = fz_new_font_from_memory(&fontdesc->font, buf->data, buf->len, 0);
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if (error)
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{
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fz_drop_buffer(buf);
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return fz_rethrow(error, "cannot load embedded font (%d %d R)", fz_to_num(stmref), fz_to_gen(stmref));
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}
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/* save the buffer so we can free it later */
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fontdesc->font->ft_data = buf->data;
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fontdesc->font->ft_size = buf->len;
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fz_free(buf); /* only free the fz_buffer struct, not the contained data */
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fontdesc->is_embedded = 1;
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return fz_okay;
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}
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/*
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* Create and destroy
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*/
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pdf_font_desc *
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pdf_keep_font(pdf_font_desc *fontdesc)
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{
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fontdesc->refs ++;
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return fontdesc;
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}
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void
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pdf_drop_font(pdf_font_desc *fontdesc)
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{
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if (fontdesc && --fontdesc->refs == 0)
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{
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if (fontdesc->font)
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fz_drop_font(fontdesc->font);
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if (fontdesc->encoding)
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pdf_drop_cmap(fontdesc->encoding);
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if (fontdesc->to_ttf_cmap)
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pdf_drop_cmap(fontdesc->to_ttf_cmap);
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if (fontdesc->to_unicode)
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pdf_drop_cmap(fontdesc->to_unicode);
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fz_free(fontdesc->cid_to_gid);
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fz_free(fontdesc->cid_to_ucs);
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fz_free(fontdesc->hmtx);
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fz_free(fontdesc->vmtx);
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fz_free(fontdesc);
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}
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}
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pdf_font_desc *
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pdf_new_font_desc(void)
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{
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pdf_font_desc *fontdesc;
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fontdesc = fz_malloc(sizeof(pdf_font_desc));
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fontdesc->refs = 1;
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fontdesc->font = NULL;
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fontdesc->flags = 0;
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fontdesc->italic_angle = 0;
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fontdesc->ascent = 0;
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fontdesc->descent = 0;
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fontdesc->cap_height = 0;
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fontdesc->x_height = 0;
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fontdesc->missing_width = 0;
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fontdesc->encoding = NULL;
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fontdesc->to_ttf_cmap = NULL;
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fontdesc->cid_to_gid_len = 0;
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fontdesc->cid_to_gid = NULL;
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fontdesc->to_unicode = NULL;
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fontdesc->cid_to_ucs_len = 0;
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fontdesc->cid_to_ucs = NULL;
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fontdesc->wmode = 0;
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fontdesc->hmtx_cap = 0;
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fontdesc->vmtx_cap = 0;
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fontdesc->hmtx_len = 0;
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fontdesc->vmtx_len = 0;
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fontdesc->hmtx = NULL;
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fontdesc->vmtx = NULL;
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fontdesc->dhmtx.lo = 0x0000;
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fontdesc->dhmtx.hi = 0xFFFF;
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fontdesc->dhmtx.w = 1000;
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fontdesc->dvmtx.lo = 0x0000;
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fontdesc->dvmtx.hi = 0xFFFF;
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fontdesc->dvmtx.x = 0;
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fontdesc->dvmtx.y = 880;
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fontdesc->dvmtx.w = -1000;
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fontdesc->is_embedded = 0;
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return fontdesc;
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}
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/*
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* Simple fonts (Type1 and TrueType)
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*/
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static fz_error
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pdf_load_simple_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *dict)
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{
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fz_error error;
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fz_obj *descriptor;
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fz_obj *encoding;
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fz_obj *widths;
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unsigned short *etable = NULL;
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pdf_font_desc *fontdesc;
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FT_Face face;
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FT_CharMap cmap;
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int symbolic;
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int kind;
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char *basefont;
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char *fontname;
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char *estrings[256];
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char ebuffer[256][32];
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int i, k, n;
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int fterr;
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basefont = fz_to_name(fz_dict_gets(dict, "BaseFont"));
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fontname = clean_font_name(basefont);
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/* Load font file */
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fontdesc = pdf_new_font_desc();
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descriptor = fz_dict_gets(dict, "FontDescriptor");
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if (descriptor)
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error = pdf_load_font_descriptor(fontdesc, xref, descriptor, NULL, basefont);
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else
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error = pdf_load_builtin_font(fontdesc, fontname);
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if (error)
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goto cleanup;
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/* Some chinese documents mistakenly consider WinAnsiEncoding to be codepage 936 */
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if (!*fontdesc->font->name &&
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!fz_dict_gets(dict, "ToUnicode") &&
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!strcmp(fz_to_name(fz_dict_gets(dict, "Encoding")), "WinAnsiEncoding") &&
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fz_to_int(fz_dict_gets(descriptor, "Flags")) == 4)
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{
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/* note: without the comma, pdf_load_font_descriptor would prefer /FontName over /BaseFont */
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char *cp936fonts[] = {
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"\xCB\xCE\xCC\xE5", "SimSun,Regular",
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"\xBA\xDA\xCC\xE5", "SimHei,Regular",
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"\xBF\xAC\xCC\xE5_GB2312", "SimKai,Regular",
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"\xB7\xC2\xCB\xCE_GB2312", "SimFang,Regular",
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"\xC1\xA5\xCA\xE9", "SimLi,Regular",
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NULL
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};
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for (i = 0; cp936fonts[i]; i += 2)
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if (!strcmp(basefont, cp936fonts[i]))
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break;
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if (cp936fonts[i])
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{
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fz_warn("workaround for S22PDF lying about chinese font encodings");
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pdf_drop_font(fontdesc);
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fontdesc = pdf_new_font_desc();
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error = pdf_load_font_descriptor(fontdesc, xref, descriptor, "Adobe-GB1", cp936fonts[i+1]);
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error |= pdf_load_system_cmap(&fontdesc->encoding, "GBK-EUC-H");
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error |= pdf_load_system_cmap(&fontdesc->to_unicode, "Adobe-GB1-UCS2");
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error |= pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-GB1-UCS2");
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if (error)
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return fz_rethrow(error, "cannot load font");
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face = fontdesc->font->ft_face;
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kind = ft_kind(face);
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goto skip_encoding;
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}
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}
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|
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face = fontdesc->font->ft_face;
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kind = ft_kind(face);
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/* Encoding */
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symbolic = fontdesc->flags & 4;
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if (face->num_charmaps > 0)
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cmap = face->charmaps[0];
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else
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cmap = NULL;
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for (i = 0; i < face->num_charmaps; i++)
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{
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FT_CharMap test = face->charmaps[i];
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if (kind == TYPE1)
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{
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if (test->platform_id == 7)
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cmap = test;
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}
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|
|
if (kind == TRUETYPE)
|
|
{
|
|
if (test->platform_id == 1 && test->encoding_id == 0)
|
|
cmap = test;
|
|
if (test->platform_id == 3 && test->encoding_id == 1)
|
|
cmap = test;
|
|
}
|
|
}
|
|
|
|
if (cmap)
|
|
{
|
|
fterr = FT_Set_Charmap(face, cmap);
|
|
if (fterr)
|
|
fz_warn("freetype could not set cmap: %s", ft_error_string(fterr));
|
|
}
|
|
else
|
|
fz_warn("freetype could not find any cmaps");
|
|
|
|
etable = fz_calloc(256, sizeof(unsigned short));
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
estrings[i] = NULL;
|
|
etable[i] = 0;
|
|
}
|
|
|
|
encoding = fz_dict_gets(dict, "Encoding");
|
|
if (encoding)
|
|
{
|
|
if (fz_is_name(encoding))
|
|
pdf_load_encoding(estrings, fz_to_name(encoding));
|
|
|
|
if (fz_is_dict(encoding))
|
|
{
|
|
fz_obj *base, *diff, *item;
|
|
|
|
base = fz_dict_gets(encoding, "BaseEncoding");
|
|
if (fz_is_name(base))
|
|
pdf_load_encoding(estrings, fz_to_name(base));
|
|
else if (!fontdesc->is_embedded && !symbolic)
|
|
pdf_load_encoding(estrings, "StandardEncoding");
|
|
|
|
diff = fz_dict_gets(encoding, "Differences");
|
|
if (fz_is_array(diff))
|
|
{
|
|
n = fz_array_len(diff);
|
|
k = 0;
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
item = fz_array_get(diff, i);
|
|
if (fz_is_int(item))
|
|
k = fz_to_int(item);
|
|
if (fz_is_name(item))
|
|
estrings[k++] = fz_to_name(item);
|
|
if (k < 0) k = 0;
|
|
if (k > 255) k = 255;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* start with the builtin encoding */
|
|
for (i = 0; i < 256; i++)
|
|
etable[i] = ft_char_index(face, i);
|
|
|
|
/* encode by glyph name where we can */
|
|
if (kind == TYPE1)
|
|
{
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if (estrings[i])
|
|
{
|
|
etable[i] = FT_Get_Name_Index(face, estrings[i]);
|
|
if (etable[i] == 0)
|
|
{
|
|
int aglcode = pdf_lookup_agl(estrings[i]);
|
|
const char **dupnames = pdf_lookup_agl_duplicates(aglcode);
|
|
while (*dupnames)
|
|
{
|
|
etable[i] = FT_Get_Name_Index(face, (char*)*dupnames);
|
|
if (etable[i])
|
|
break;
|
|
dupnames++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* encode by glyph name where we can */
|
|
if (kind == TRUETYPE)
|
|
{
|
|
/* Unicode cmap */
|
|
if (!symbolic && face->charmap && face->charmap->platform_id == 3)
|
|
{
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if (estrings[i])
|
|
{
|
|
int aglcode = pdf_lookup_agl(estrings[i]);
|
|
if (!aglcode)
|
|
etable[i] = FT_Get_Name_Index(face, estrings[i]);
|
|
else
|
|
etable[i] = ft_char_index(face, aglcode);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* MacRoman cmap */
|
|
else if (!symbolic && face->charmap && face->charmap->platform_id == 1)
|
|
{
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if (estrings[i])
|
|
{
|
|
k = lookup_mre_code(estrings[i]);
|
|
if (k <= 0)
|
|
etable[i] = FT_Get_Name_Index(face, estrings[i]);
|
|
else
|
|
etable[i] = ft_char_index(face, k);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Symbolic cmap */
|
|
else
|
|
{
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if (estrings[i])
|
|
{
|
|
etable[i] = FT_Get_Name_Index(face, estrings[i]);
|
|
if (etable[i] == 0)
|
|
etable[i] = ft_char_index(face, i);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* try to reverse the glyph names from the builtin encoding */
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
if (etable[i] && !estrings[i])
|
|
{
|
|
if (FT_HAS_GLYPH_NAMES(face))
|
|
{
|
|
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
|
|
if (fterr)
|
|
fz_warn("freetype get glyph name (gid %d): %s", etable[i], ft_error_string(fterr));
|
|
if (ebuffer[i][0])
|
|
estrings[i] = ebuffer[i];
|
|
}
|
|
else
|
|
{
|
|
estrings[i] = (char*) pdf_win_ansi[i]; /* discard const */
|
|
}
|
|
}
|
|
}
|
|
|
|
fontdesc->encoding = pdf_new_identity_cmap(0, 1);
|
|
fontdesc->cid_to_gid_len = 256;
|
|
fontdesc->cid_to_gid = etable;
|
|
|
|
error = pdf_load_to_unicode(fontdesc, xref, estrings, NULL, fz_dict_gets(dict, "ToUnicode"));
|
|
if (error)
|
|
fz_catch(error, "cannot load to_unicode");
|
|
|
|
skip_encoding:
|
|
|
|
/* Widths */
|
|
|
|
pdf_set_default_hmtx(fontdesc, fontdesc->missing_width);
|
|
|
|
widths = fz_dict_gets(dict, "Widths");
|
|
if (widths)
|
|
{
|
|
int first, last;
|
|
|
|
first = fz_to_int(fz_dict_gets(dict, "FirstChar"));
|
|
last = fz_to_int(fz_dict_gets(dict, "LastChar"));
|
|
|
|
if (first < 0 || last > 255 || first > last)
|
|
first = last = 0;
|
|
|
|
for (i = 0; i < last - first + 1; i++)
|
|
{
|
|
int wid = fz_to_int(fz_array_get(widths, i));
|
|
pdf_add_hmtx(fontdesc, i + first, i + first, wid);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
|
|
if (fterr)
|
|
fz_warn("freetype set character size: %s", ft_error_string(fterr));
|
|
for (i = 0; i < 256; i++)
|
|
{
|
|
pdf_add_hmtx(fontdesc, i, i, ft_width(fontdesc, i));
|
|
}
|
|
}
|
|
|
|
pdf_end_hmtx(fontdesc);
|
|
|
|
*fontdescp = fontdesc;
|
|
return fz_okay;
|
|
|
|
cleanup:
|
|
if (etable != fontdesc->cid_to_gid)
|
|
fz_free(etable);
|
|
pdf_drop_font(fontdesc);
|
|
return fz_rethrow(error, "cannot load simple font (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
|
|
}
|
|
|
|
/*
|
|
* CID Fonts
|
|
*/
|
|
|
|
static fz_error
|
|
load_cid_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *dict, fz_obj *encoding, fz_obj *to_unicode)
|
|
{
|
|
fz_error error;
|
|
fz_obj *widths;
|
|
fz_obj *descriptor;
|
|
pdf_font_desc *fontdesc;
|
|
FT_Face face;
|
|
int kind;
|
|
char collection[256];
|
|
char *basefont;
|
|
int i, k, fterr;
|
|
fz_obj *obj;
|
|
int dw;
|
|
|
|
/* Get font name and CID collection */
|
|
|
|
basefont = fz_to_name(fz_dict_gets(dict, "BaseFont"));
|
|
|
|
{
|
|
fz_obj *cidinfo;
|
|
char tmpstr[64];
|
|
int tmplen;
|
|
|
|
cidinfo = fz_dict_gets(dict, "CIDSystemInfo");
|
|
if (!cidinfo)
|
|
return fz_throw("cid font is missing info");
|
|
|
|
obj = fz_dict_gets(cidinfo, "Registry");
|
|
tmplen = MIN(sizeof tmpstr - 1, fz_to_str_len(obj));
|
|
memcpy(tmpstr, fz_to_str_buf(obj), tmplen);
|
|
tmpstr[tmplen] = '\0';
|
|
fz_strlcpy(collection, tmpstr, sizeof collection);
|
|
|
|
fz_strlcat(collection, "-", sizeof collection);
|
|
|
|
obj = fz_dict_gets(cidinfo, "Ordering");
|
|
tmplen = MIN(sizeof tmpstr - 1, fz_to_str_len(obj));
|
|
memcpy(tmpstr, fz_to_str_buf(obj), tmplen);
|
|
tmpstr[tmplen] = '\0';
|
|
fz_strlcat(collection, tmpstr, sizeof collection);
|
|
}
|
|
|
|
/* Load font file */
|
|
|
|
fontdesc = pdf_new_font_desc();
|
|
|
|
descriptor = fz_dict_gets(dict, "FontDescriptor");
|
|
if (descriptor)
|
|
error = pdf_load_font_descriptor(fontdesc, xref, descriptor, collection, basefont);
|
|
else
|
|
error = fz_throw("syntaxerror: missing font descriptor");
|
|
if (error)
|
|
goto cleanup;
|
|
|
|
face = fontdesc->font->ft_face;
|
|
kind = ft_kind(face);
|
|
|
|
/* Encoding */
|
|
|
|
error = fz_okay;
|
|
if (fz_is_name(encoding))
|
|
{
|
|
if (!strcmp(fz_to_name(encoding), "Identity-H"))
|
|
fontdesc->encoding = pdf_new_identity_cmap(0, 2);
|
|
else if (!strcmp(fz_to_name(encoding), "Identity-V"))
|
|
fontdesc->encoding = pdf_new_identity_cmap(1, 2);
|
|
else
|
|
error = pdf_load_system_cmap(&fontdesc->encoding, fz_to_name(encoding));
|
|
}
|
|
else if (fz_is_indirect(encoding))
|
|
{
|
|
error = pdf_load_embedded_cmap(&fontdesc->encoding, xref, encoding);
|
|
}
|
|
else
|
|
{
|
|
error = fz_throw("syntaxerror: font missing encoding");
|
|
}
|
|
if (error)
|
|
goto cleanup;
|
|
|
|
pdf_set_font_wmode(fontdesc, pdf_get_wmode(fontdesc->encoding));
|
|
|
|
if (kind == TRUETYPE)
|
|
{
|
|
fz_obj *cidtogidmap;
|
|
|
|
cidtogidmap = fz_dict_gets(dict, "CIDToGIDMap");
|
|
if (fz_is_indirect(cidtogidmap))
|
|
{
|
|
fz_buffer *buf;
|
|
|
|
error = pdf_load_stream(&buf, xref, fz_to_num(cidtogidmap), fz_to_gen(cidtogidmap));
|
|
if (error)
|
|
goto cleanup;
|
|
|
|
fontdesc->cid_to_gid_len = (buf->len) / 2;
|
|
fontdesc->cid_to_gid = fz_calloc(fontdesc->cid_to_gid_len, sizeof(unsigned short));
|
|
for (i = 0; i < fontdesc->cid_to_gid_len; i++)
|
|
fontdesc->cid_to_gid[i] = (buf->data[i * 2] << 8) + buf->data[i * 2 + 1];
|
|
|
|
fz_drop_buffer(buf);
|
|
}
|
|
|
|
/* if truetype font is external, cidtogidmap should not be identity */
|
|
/* so we map from cid to unicode and then map that through the (3 1) */
|
|
/* unicode cmap to get a glyph id */
|
|
else if (fontdesc->font->ft_substitute)
|
|
{
|
|
fterr = FT_Select_Charmap(face, ft_encoding_unicode);
|
|
if (fterr)
|
|
{
|
|
error = fz_throw("fonterror: no unicode cmap when emulating CID font: %s", ft_error_string(fterr));
|
|
goto cleanup;
|
|
}
|
|
|
|
if (!strcmp(collection, "Adobe-CNS1"))
|
|
error = pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-CNS1-UCS2");
|
|
else if (!strcmp(collection, "Adobe-GB1"))
|
|
error = pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-GB1-UCS2");
|
|
else if (!strcmp(collection, "Adobe-Japan1"))
|
|
error = pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-Japan1-UCS2");
|
|
else if (!strcmp(collection, "Adobe-Japan2"))
|
|
error = pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-Japan2-UCS2");
|
|
else if (!strcmp(collection, "Adobe-Korea1"))
|
|
error = pdf_load_system_cmap(&fontdesc->to_ttf_cmap, "Adobe-Korea1-UCS2");
|
|
else
|
|
error = fz_okay;
|
|
|
|
if (error)
|
|
{
|
|
error = fz_rethrow(error, "cannot load system cmap %s", collection);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
}
|
|
|
|
error = pdf_load_to_unicode(fontdesc, xref, NULL, collection, to_unicode);
|
|
if (error)
|
|
fz_catch(error, "cannot load to_unicode");
|
|
|
|
/* Horizontal */
|
|
|
|
dw = 1000;
|
|
obj = fz_dict_gets(dict, "DW");
|
|
if (obj)
|
|
dw = fz_to_int(obj);
|
|
pdf_set_default_hmtx(fontdesc, dw);
|
|
|
|
widths = fz_dict_gets(dict, "W");
|
|
if (widths)
|
|
{
|
|
int c0, c1, w;
|
|
|
|
for (i = 0; i < fz_array_len(widths); )
|
|
{
|
|
c0 = fz_to_int(fz_array_get(widths, i));
|
|
obj = fz_array_get(widths, i + 1);
|
|
if (fz_is_array(obj))
|
|
{
|
|
for (k = 0; k < fz_array_len(obj); k++)
|
|
{
|
|
w = fz_to_int(fz_array_get(obj, k));
|
|
pdf_add_hmtx(fontdesc, c0 + k, c0 + k, w);
|
|
}
|
|
i += 2;
|
|
}
|
|
else
|
|
{
|
|
c1 = fz_to_int(obj);
|
|
w = fz_to_int(fz_array_get(widths, i + 2));
|
|
pdf_add_hmtx(fontdesc, c0, c1, w);
|
|
i += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
pdf_end_hmtx(fontdesc);
|
|
|
|
/* Vertical */
|
|
|
|
if (pdf_get_wmode(fontdesc->encoding) == 1)
|
|
{
|
|
int dw2y = 880;
|
|
int dw2w = -1000;
|
|
|
|
obj = fz_dict_gets(dict, "DW2");
|
|
if (obj)
|
|
{
|
|
dw2y = fz_to_int(fz_array_get(obj, 0));
|
|
dw2w = fz_to_int(fz_array_get(obj, 1));
|
|
}
|
|
|
|
pdf_set_default_vmtx(fontdesc, dw2y, dw2w);
|
|
|
|
widths = fz_dict_gets(dict, "W2");
|
|
if (widths)
|
|
{
|
|
int c0, c1, w, x, y;
|
|
|
|
for (i = 0; i < fz_array_len(widths); )
|
|
{
|
|
c0 = fz_to_int(fz_array_get(widths, i));
|
|
obj = fz_array_get(widths, i + 1);
|
|
if (fz_is_array(obj))
|
|
{
|
|
for (k = 0; k * 3 < fz_array_len(obj); k ++)
|
|
{
|
|
w = fz_to_int(fz_array_get(obj, k * 3 + 0));
|
|
x = fz_to_int(fz_array_get(obj, k * 3 + 1));
|
|
y = fz_to_int(fz_array_get(obj, k * 3 + 2));
|
|
pdf_add_vmtx(fontdesc, c0 + k, c0 + k, x, y, w);
|
|
}
|
|
i += 2;
|
|
}
|
|
else
|
|
{
|
|
c1 = fz_to_int(obj);
|
|
w = fz_to_int(fz_array_get(widths, i + 2));
|
|
x = fz_to_int(fz_array_get(widths, i + 3));
|
|
y = fz_to_int(fz_array_get(widths, i + 4));
|
|
pdf_add_vmtx(fontdesc, c0, c1, x, y, w);
|
|
i += 5;
|
|
}
|
|
}
|
|
}
|
|
|
|
pdf_end_vmtx(fontdesc);
|
|
}
|
|
|
|
*fontdescp = fontdesc;
|
|
return fz_okay;
|
|
|
|
cleanup:
|
|
pdf_drop_font(fontdesc);
|
|
return fz_rethrow(error, "cannot load cid font (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
|
|
}
|
|
|
|
static fz_error
|
|
pdf_load_type0_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *dict)
|
|
{
|
|
fz_error error;
|
|
fz_obj *dfonts;
|
|
fz_obj *dfont;
|
|
fz_obj *subtype;
|
|
fz_obj *encoding;
|
|
fz_obj *to_unicode;
|
|
|
|
dfonts = fz_dict_gets(dict, "DescendantFonts");
|
|
if (!dfonts)
|
|
return fz_throw("cid font is missing descendant fonts");
|
|
|
|
dfont = fz_array_get(dfonts, 0);
|
|
|
|
subtype = fz_dict_gets(dfont, "Subtype");
|
|
encoding = fz_dict_gets(dict, "Encoding");
|
|
to_unicode = fz_dict_gets(dict, "ToUnicode");
|
|
|
|
if (fz_is_name(subtype) && !strcmp(fz_to_name(subtype), "CIDFontType0"))
|
|
error = load_cid_font(fontdescp, xref, dfont, encoding, to_unicode);
|
|
else if (fz_is_name(subtype) && !strcmp(fz_to_name(subtype), "CIDFontType2"))
|
|
error = load_cid_font(fontdescp, xref, dfont, encoding, to_unicode);
|
|
else
|
|
error = fz_throw("syntaxerror: unknown cid font type");
|
|
if (error)
|
|
return fz_rethrow(error, "cannot load descendant font (%d %d R)", fz_to_num(dfont), fz_to_gen(dfont));
|
|
|
|
return fz_okay;
|
|
}
|
|
|
|
/*
|
|
* FontDescriptor
|
|
*/
|
|
|
|
static fz_error
|
|
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_xref *xref, fz_obj *dict, char *collection, char *basefont)
|
|
{
|
|
fz_error error;
|
|
fz_obj *obj1, *obj2, *obj3, *obj;
|
|
char *fontname;
|
|
char *origname;
|
|
FT_Face face;
|
|
|
|
if (!strchr(basefont, ',') || strchr(basefont, '+'))
|
|
origname = fz_to_name(fz_dict_gets(dict, "FontName"));
|
|
else
|
|
origname = basefont;
|
|
fontname = clean_font_name(origname);
|
|
|
|
fontdesc->flags = fz_to_int(fz_dict_gets(dict, "Flags"));
|
|
fontdesc->italic_angle = fz_to_real(fz_dict_gets(dict, "ItalicAngle"));
|
|
fontdesc->ascent = fz_to_real(fz_dict_gets(dict, "Ascent"));
|
|
fontdesc->descent = fz_to_real(fz_dict_gets(dict, "Descent"));
|
|
fontdesc->cap_height = fz_to_real(fz_dict_gets(dict, "CapHeight"));
|
|
fontdesc->x_height = fz_to_real(fz_dict_gets(dict, "XHeight"));
|
|
fontdesc->missing_width = fz_to_real(fz_dict_gets(dict, "MissingWidth"));
|
|
|
|
obj1 = fz_dict_gets(dict, "FontFile");
|
|
obj2 = fz_dict_gets(dict, "FontFile2");
|
|
obj3 = fz_dict_gets(dict, "FontFile3");
|
|
obj = obj1 ? obj1 : obj2 ? obj2 : obj3;
|
|
|
|
if (fz_is_indirect(obj))
|
|
{
|
|
error = pdf_load_embedded_font(fontdesc, xref, obj);
|
|
if (error)
|
|
{
|
|
fz_catch(error, "ignored error when loading embedded font, attempting to load system font");
|
|
if (origname != fontname)
|
|
error = pdf_load_builtin_font(fontdesc, fontname);
|
|
else
|
|
error = pdf_load_system_font(fontdesc, fontname, collection);
|
|
if (error)
|
|
return fz_rethrow(error, "cannot load font descriptor (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (origname != fontname)
|
|
error = pdf_load_builtin_font(fontdesc, fontname);
|
|
else
|
|
error = pdf_load_system_font(fontdesc, fontname, collection);
|
|
if (error)
|
|
return fz_rethrow(error, "cannot load font descriptor (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
|
|
}
|
|
|
|
fz_strlcpy(fontdesc->font->name, fontname, sizeof fontdesc->font->name);
|
|
|
|
/* Check for DynaLab fonts that must use hinting */
|
|
face = fontdesc->font->ft_face;
|
|
if (ft_kind(face) == TRUETYPE)
|
|
{
|
|
if (FT_IS_TRICKY(face) || is_dynalab(fontdesc->font->name))
|
|
fontdesc->font->ft_hint = 1;
|
|
}
|
|
|
|
return fz_okay;
|
|
|
|
}
|
|
|
|
static void
|
|
pdf_make_width_table(pdf_font_desc *fontdesc)
|
|
{
|
|
fz_font *font = fontdesc->font;
|
|
int i, k, cid, gid;
|
|
|
|
font->width_count = 0;
|
|
for (i = 0; i < fontdesc->hmtx_len; i++)
|
|
{
|
|
for (k = fontdesc->hmtx[i].lo; k <= fontdesc->hmtx[i].hi; k++)
|
|
{
|
|
cid = pdf_lookup_cmap(fontdesc->encoding, k);
|
|
gid = pdf_font_cid_to_gid(fontdesc, cid);
|
|
if (gid > font->width_count)
|
|
font->width_count = gid;
|
|
}
|
|
}
|
|
font->width_count ++;
|
|
|
|
font->width_table = fz_calloc(font->width_count, sizeof(int));
|
|
memset(font->width_table, 0, sizeof(int) * font->width_count);
|
|
|
|
for (i = 0; i < fontdesc->hmtx_len; i++)
|
|
{
|
|
for (k = fontdesc->hmtx[i].lo; k <= fontdesc->hmtx[i].hi; k++)
|
|
{
|
|
cid = pdf_lookup_cmap(fontdesc->encoding, k);
|
|
gid = pdf_font_cid_to_gid(fontdesc, cid);
|
|
if (gid >= 0 && gid < font->width_count)
|
|
font->width_table[gid] = fontdesc->hmtx[i].w;
|
|
}
|
|
}
|
|
}
|
|
|
|
fz_error
|
|
pdf_load_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict)
|
|
{
|
|
fz_error error;
|
|
char *subtype;
|
|
fz_obj *dfonts;
|
|
fz_obj *charprocs;
|
|
|
|
if ((*fontdescp = pdf_find_item(xref->store, pdf_drop_font, dict)))
|
|
{
|
|
pdf_keep_font(*fontdescp);
|
|
return fz_okay;
|
|
}
|
|
|
|
subtype = fz_to_name(fz_dict_gets(dict, "Subtype"));
|
|
dfonts = fz_dict_gets(dict, "DescendantFonts");
|
|
charprocs = fz_dict_gets(dict, "CharProcs");
|
|
|
|
if (subtype && !strcmp(subtype, "Type0"))
|
|
error = pdf_load_type0_font(fontdescp, xref, dict);
|
|
else if (subtype && !strcmp(subtype, "Type1"))
|
|
error = pdf_load_simple_font(fontdescp, xref, dict);
|
|
else if (subtype && !strcmp(subtype, "MMType1"))
|
|
error = pdf_load_simple_font(fontdescp, xref, dict);
|
|
else if (subtype && !strcmp(subtype, "TrueType"))
|
|
error = pdf_load_simple_font(fontdescp, xref, dict);
|
|
else if (subtype && !strcmp(subtype, "Type3"))
|
|
error = pdf_load_type3_font(fontdescp, xref, rdb, dict);
|
|
else if (charprocs)
|
|
{
|
|
fz_warn("unknown font format, guessing type3.");
|
|
error = pdf_load_type3_font(fontdescp, xref, rdb, dict);
|
|
}
|
|
else if (dfonts)
|
|
{
|
|
fz_warn("unknown font format, guessing type0.");
|
|
error = pdf_load_type0_font(fontdescp, xref, dict);
|
|
}
|
|
else
|
|
{
|
|
fz_warn("unknown font format, guessing type1 or truetype.");
|
|
error = pdf_load_simple_font(fontdescp, xref, dict);
|
|
}
|
|
if (error)
|
|
return fz_rethrow(error, "cannot load font (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
|
|
|
|
/* Save the widths to stretch non-CJK substitute fonts */
|
|
if ((*fontdescp)->font->ft_substitute && !(*fontdescp)->to_ttf_cmap)
|
|
pdf_make_width_table(*fontdescp);
|
|
|
|
pdf_store_item(xref->store, pdf_keep_font, pdf_drop_font, dict, *fontdescp);
|
|
|
|
return fz_okay;
|
|
}
|
|
|
|
void
|
|
pdf_debug_font(pdf_font_desc *fontdesc)
|
|
{
|
|
int i;
|
|
|
|
printf("fontdesc {\n");
|
|
|
|
if (fontdesc->font->ft_face)
|
|
printf("\tfreetype font\n");
|
|
if (fontdesc->font->t3procs)
|
|
printf("\ttype3 font\n");
|
|
|
|
printf("\twmode %d\n", fontdesc->wmode);
|
|
printf("\tDW %d\n", fontdesc->dhmtx.w);
|
|
|
|
printf("\tW {\n");
|
|
for (i = 0; i < fontdesc->hmtx_len; i++)
|
|
printf("\t\t<%04x> <%04x> %d\n",
|
|
fontdesc->hmtx[i].lo, fontdesc->hmtx[i].hi, fontdesc->hmtx[i].w);
|
|
printf("\t}\n");
|
|
|
|
if (fontdesc->wmode)
|
|
{
|
|
printf("\tDW2 [%d %d]\n", fontdesc->dvmtx.y, fontdesc->dvmtx.w);
|
|
printf("\tW2 {\n");
|
|
for (i = 0; i < fontdesc->vmtx_len; i++)
|
|
printf("\t\t<%04x> <%04x> %d %d %d\n", fontdesc->vmtx[i].lo, fontdesc->vmtx[i].hi,
|
|
fontdesc->vmtx[i].x, fontdesc->vmtx[i].y, fontdesc->vmtx[i].w);
|
|
printf("\t}\n");
|
|
}
|
|
}
|