font.h

#ifndef MUPDF_PDF_FONT_H
#define MUPDF_PDF_FONT_H

/*
 * Font
 */

enum
{
	PDF_FD_FIXED_PITCH = 1 << 0,
	PDF_FD_SERIF = 1 << 1,
	PDF_FD_SYMBOLIC = 1 << 2,
	PDF_FD_SCRIPT = 1 << 3,
	PDF_FD_NONSYMBOLIC = 1 << 5,
	PDF_FD_ITALIC = 1 << 6,
	PDF_FD_ALL_CAP = 1 << 16,
	PDF_FD_SMALL_CAP = 1 << 17,
	PDF_FD_FORCE_BOLD = 1 << 18
};

void pdf_load_encoding(char **estrings, char *encoding);
int pdf_lookup_agl(char *name);
const char **pdf_lookup_agl_duplicates(int ucs);

extern const unsigned short pdf_doc_encoding[256];
extern const char * const pdf_mac_roman[256];
extern const char * const pdf_mac_expert[256];
extern const char * const pdf_win_ansi[256];
extern const char * const pdf_standard[256];

typedef struct pdf_font_desc_s pdf_font_desc;
typedef struct pdf_hmtx_s pdf_hmtx;
typedef struct pdf_vmtx_s pdf_vmtx;

struct pdf_hmtx_s
{
	unsigned short lo;
	unsigned short hi;
	int w;	/* type3 fonts can be big! */
};

struct pdf_vmtx_s
{
	unsigned short lo;
	unsigned short hi;
	short x;
	short y;
	short w;
};

struct pdf_font_desc_s
{
	fz_storable storable;
	unsigned int size;

	fz_font *font;

	/* FontDescriptor */
	int flags;
	float italic_angle;
	float ascent;
	float descent;
	float cap_height;
	float x_height;
	float missing_width;

	/* Encoding (CMap) */
	pdf_cmap *encoding;
	pdf_cmap *to_ttf_cmap;
	int cid_to_gid_len;
	unsigned short *cid_to_gid;

	/* ToUnicode */
	pdf_cmap *to_unicode;
	int cid_to_ucs_len;
	unsigned short *cid_to_ucs;

	/* Metrics (given in the PDF file) */
	int wmode;

	int hmtx_len, hmtx_cap;
	pdf_hmtx dhmtx;
	pdf_hmtx *hmtx;

	int vmtx_len, vmtx_cap;
	pdf_vmtx dvmtx;
	pdf_vmtx *vmtx;

	int is_embedded;
};

void pdf_set_font_wmode(fz_context *ctx, pdf_font_desc *font, int wmode);
void pdf_set_default_hmtx(fz_context *ctx, pdf_font_desc *font, int w);
void pdf_set_default_vmtx(fz_context *ctx, pdf_font_desc *font, int y, int w);
void pdf_add_hmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int w);
void pdf_add_vmtx(fz_context *ctx, pdf_font_desc *font, int lo, int hi, int x, int y, int w);
void pdf_end_hmtx(fz_context *ctx, pdf_font_desc *font);
void pdf_end_vmtx(fz_context *ctx, pdf_font_desc *font);
pdf_hmtx pdf_lookup_hmtx(fz_context *ctx, pdf_font_desc *font, int cid);
pdf_vmtx pdf_lookup_vmtx(fz_context *ctx, pdf_font_desc *font, int cid);

void pdf_load_to_unicode(fz_context *ctx, pdf_document *doc, pdf_font_desc *font, char **strings, char *collection, pdf_obj *cmapstm);

int pdf_font_cid_to_gid(fz_context *ctx, pdf_font_desc *fontdesc, int cid);

unsigned char *pdf_lookup_builtin_font(fz_context *ctx, const char *name, unsigned int *len);
unsigned char *pdf_lookup_substitute_font(fz_context *ctx, int mono, int serif, int bold, int italic, unsigned int *len);
unsigned char *pdf_lookup_substitute_cjk_font(fz_context *ctx, int ros, int serif, int wmode, unsigned int *len, int *index);

pdf_font_desc *pdf_load_type3_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *obj);
void pdf_load_type3_glyphs(fz_context *ctx, pdf_document *doc, pdf_font_desc *fontdesc, int nestedDepth);
pdf_font_desc *pdf_load_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *obj, int nestedDepth);
pdf_font_desc *pdf_load_hail_mary_font(fz_context *ctx, pdf_document *doc);

pdf_font_desc *pdf_new_font_desc(fz_context *ctx);
pdf_font_desc *pdf_keep_font(fz_context *ctx, pdf_font_desc *fontdesc);
void pdf_drop_font(fz_context *ctx, pdf_font_desc *font);

#ifndef NDEBUG
void pdf_print_font(fz_context *ctx, pdf_font_desc *fontdesc);
#endif

fz_rect *pdf_measure_text(fz_context *ctx, pdf_font_desc *fontdesc, unsigned char *buf, int len, fz_rect *rect);
float pdf_text_stride(fz_context *ctx, pdf_font_desc *fontdesc, float fontsize, unsigned char *buf, int len, float room, int *count);

void pdf_run_glyph(fz_context *ctx, pdf_document *doc, pdf_obj *resources, fz_buffer *contents, fz_device *dev, const fz_matrix *ctm, void *gstate, int nestedDepth);

#endif