X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/halibut/blobdiff_plain/f0e51ce1f8e8c03966509153e9ff360684d4dd6f..b5232689b6acadf75a2663aa386cc4685d1139a3:/paper.h diff --git a/paper.h b/paper.h index 7c46571..9bea29d 100644 --- a/paper.h +++ b/paper.h @@ -8,7 +8,14 @@ #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 + typedef struct document_Tag document; +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; @@ -35,14 +42,46 @@ struct document_Tag { }; /* - * This data structure represents a particular font. + * This data structure represents a kerning pair within a font. */ -struct font_data_Tag { +struct kern_pair_Tag { + /* Glyph indices, in font_data.glyphs. */ + unsigned short left, right; + /* Kern amount, in internal units. */ + int kern; +}; + +/* + * ... and this one represents a ligature. + */ +struct ligature_Tag { + unsigned short 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; /* + * The file containing this font, if any. + */ + FILE *fp; + filepos pos; + /* + * Lengths of the unencrypted and encrypted portions of the font. + */ + long length1, length2; + /* * An array of pointers to the available glyph names, and their * corresponding character widths. These two arrays have * parallel indices. @@ -51,6 +90,15 @@ struct font_data_Tag { const char *const *glyphs; const int *widths; /* + * Glyph indices sorted into glyph-name order, for name-to-index + * mapping. + */ + unsigned short *glyphsbyname; + /* 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 * restrict myself to the BMP for the moment since I happen to @@ -59,6 +107,26 @@ struct font_data_Tag { */ unsigned short 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 * will track which glyphs go into which subfonts. Also here I @@ -123,6 +191,7 @@ enum { */ struct para_data_Tag { + para_data *next; /* * Data about the fonts used in this paragraph. Indices are the * FONT_* constants defined above. @@ -140,6 +209,28 @@ struct para_data_Tag { */ line_data *first; /* first line in paragraph */ line_data *last; /* last line in paragraph */ + /* + * Some paragraphs have associated graphics; currently this is + * nothing more complex than a single black rectangle. + */ + enum { + RECT_NONE, RECT_CHAPTER_UNDERLINE, RECT_RULE + } rect_type; + /* + * We left- and right-justify in special circumstances. + */ + enum { + JUST, LEFT, RIGHT + } justification; + /* + * For constructing the page outline. + */ + int outline_level; /* 0=title 1=C 2=H 3=S 4=S2... */ + wchar_t *outline_title; + /* + * For adding the page number of a contents entry afterwards. + */ + paragraph *contents_entry; }; struct line_data_Tag { @@ -166,6 +257,7 @@ struct line_data_Tag { word *end; int xpos; int hshortfall, nspaces; /* for justifying paragraphs */ + int real_shortfall; /* * Auxiliary text: a section number in a margin, or a list item * bullet or number. Also mention where to display this text @@ -192,9 +284,9 @@ struct line_data_Tag { /* * These fields are used in the page breaking algorithm. */ - int bestcost; - int vshortfall, text, space; - line_data *page_last; /* last line on a page starting here */ + int *bestcost; + int *vshortfall, *text, *space; + line_data **page_last; /* last line on a page starting here */ /* * After page breaking, we can assign an actual y-coordinate on * the page to each line. Also we store a pointer back to the @@ -237,6 +329,10 @@ struct page_data_Tag { rect *first_rect; rect *last_rect; /* + * The page number, as a string. + */ + wchar_t *number; + /* * This spare pointer field is for use by the client backends. */ void *spare; @@ -248,6 +344,7 @@ struct text_fragment_Tag { font_encoding *fe; int fontsize; char *text; + int width; }; struct xref_dest_Tag { @@ -269,14 +366,36 @@ struct rect_Tag { struct outline_element_Tag { int level; /* 0=title 1=C 2=H 3=S 4=S2... */ - paragraph *para; + para_data *pdata; }; /* + * Functions exported from bk_paper.c + */ +int kern_cmp(void *, void *); /* use when setting up kern_pairs */ +int lig_cmp(void *, void *); /* use when setting up ligatures */ +void font_index_glyphs(font_info *fi); +int find_glyph(font_info const *fi, char const *name); + + +/* * Functions and data exported from psdata.c. */ wchar_t ps_glyph_to_unicode(char const *glyph); extern const char *const ps_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); #endif