#ifndef HALIBUT_PAPER_H
#define HALIBUT_PAPER_H
+/* Number of internal units per PostScript point. */
+#define UNITS_PER_PT 1000
+#define FUNITS_PER_PT 1000.0
+
+/* Glyphs are represented by integer indicies into a table of names. */
+typedef unsigned short glyph;
+#define NOGLYPH 0xFFFF
+
typedef struct document_Tag document;
+typedef struct glyph_width_Tag glyph_width;
+typedef struct kern_pair_Tag kern_pair;
+typedef struct ligature_Tag ligature;
+typedef struct font_info_Tag font_info;
typedef struct font_data_Tag font_data;
typedef struct font_encoding_Tag font_encoding;
typedef struct font_list_Tag font_list;
};
/*
- * This data structure represents a particular font.
+ * This data structure represents the normal width of a single glyph
+ * in a font.
*/
-struct font_data_Tag {
+struct glyph_width_Tag {
+ glyph glyph;
+ int width;
+};
+
+/*
+ * This data structure represents a kerning pair within a font.
+ */
+struct kern_pair_Tag {
+ /* Glyph indices. */
+ glyph left, right;
+ /* Kern amount, in internal units. */
+ int kern;
+};
+
+/*
+ * ... and this one represents a ligature.
+ */
+struct ligature_Tag {
+ glyph left, right, lig;
+};
+
+/*
+ * This data structure holds static information about a font that doesn't
+ * depend on the particular document. It gets generated when the font's
+ * metrics are read in.
+ */
+
+font_info *all_fonts;
+
+struct font_info_Tag {
+ font_info *next;
/*
* Specify the PostScript name of the font and its point size.
*/
const char *name;
/*
- * An array of pointers to the available glyph names, and their
- * corresponding character widths. These two arrays have
- * parallel indices.
+ * Pointer to data about the file containing the font, if any.
*/
- int nglyphs;
- const char *const *glyphs;
- const int *widths;
+ void *fontfile;
+ enum { TYPE1, TRUETYPE } filetype;
+ /* A tree of glyph_widths */
+ tree234 *widths;
+ /* A tree of kern_pairs */
+ tree234 *kerns;
+ /* ... and one of ligatures */
+ tree234 *ligs;
/*
* For reasonably speedy lookup, we set up a 65536-element
* table representing the Unicode BMP (I can conveniently
* know that no glyph in the Adobe Glyph List falls outside
* it), whose elements are indices into the above two arrays.
*/
- unsigned short bmp[65536];
+ glyph bmp[65536];
+ /*
+ * Various bits of metadata needed for the /FontDescriptor dictionary
+ * in PDF.
+ */
+ float fontbbox[4];
+ float capheight;
+ float xheight;
+ float ascent;
+ float descent;
+ float stemv;
+ float stemh;
+ float italicangle;
+};
+
+/*
+ * This structure holds the information about how a font is used
+ * in a document.
+ */
+struct font_data_Tag {
+ font_info const *info;
/*
* At some point I'm going to divide the font into sub-fonts
- * with largely non-overlapping encoding vectors. This array
+ * with largely non-overlapping encoding vectors. This tree
* will track which glyphs go into which subfonts. Also here I
* keep track of the latest subfont of any given font, so I can
* go back and extend its encoding.
*/
- subfont_map_entry *subfont_map;
+ tree234 *subfont_map;
font_encoding *latest_subfont;
/*
* The font list to which this font belongs.
char *name; /* used by client backends */
font_data *font; /* the parent font structure */
- const char *vector[256]; /* the actual encoding vector */
- int indices[256]; /* indices back into main font struct */
+ glyph vector[256]; /* the actual encoding vector */
wchar_t to_unicode[256]; /* PDF will want to know this */
int free_pos; /* space left to extend encoding */
};
JUST, LEFT, RIGHT
} justification;
/*
+ * Sometimes (in code paragraphs) we want to override the flags
+ * passed to render_string().
+ */
+ unsigned extraflags;
+ /*
* For constructing the page outline.
*/
int outline_level; /* 0=title 1=C 2=H 3=S 4=S2... */
font_encoding *fe;
int fontsize;
char *text;
+ int width;
};
struct xref_dest_Tag {
};
/*
+ * Functions exported from bk_paper.c
+ */
+int width_cmp(void *, void *); /* use when setting up widths */
+int kern_cmp(void *, void *); /* use when setting up kern_pairs */
+int lig_cmp(void *, void *); /* use when setting up ligatures */
+int find_width(font_data *, glyph);
+
+/*
* Functions and data exported from psdata.c.
*/
-wchar_t ps_glyph_to_unicode(char const *glyph);
+glyph glyph_intern(char const *);
+char const *glyph_extern(glyph);
+wchar_t ps_glyph_to_unicode(glyph);
extern const char *const ps_std_glyphs[];
+extern glyph const tt_std_glyphs[];
+void init_std_fonts(void);
const int *ps_std_font_widths(char const *fontname);
+const kern_pair *ps_std_font_kerns(char const *fontname);
+
+/*
+ * Function from bk_pdf.c borrowed by bk_ps.c
+ */
+char *pdf_outline_convert(wchar_t *s, int *len);
+
+/*
+ * Backend functions exported by in_pf.c
+ */
+void pf_part1(font_info *fi, char **bufp, size_t *lenp);
+void pf_part2(font_info *fi, char **bufp, size_t *lenp);
+void pf_writeps(font_info const *fi, FILE *ofp);
+
+/*
+ * Backend functions exported by in_sfnt.c
+ */
+void sfnt_writeps(font_info const *fi, FILE *ofp);
#endif