eBookReaderSwitch/include/mupdf/pdf/font.h

#ifndef MUPDF_PDF_FONT_H
#define MUPDF_PDF_FONT_H

#include "mupdf/pdf/cmap.h"

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(const char **estrings, const char *encoding);

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;
	size_t 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;
	size_t cid_to_gid_len;
	unsigned short *cid_to_gid;

	/* ToUnicode */
	pdf_cmap *to_unicode;
	size_t 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, const char **strings, char *collection, pdf_obj *cmapstm);

int pdf_font_cid_to_gid(fz_context *ctx, pdf_font_desc *fontdesc, int cid);
const char *pdf_clean_font_name(const char *fontname);

const unsigned char *pdf_lookup_substitute_font(fz_context *ctx, int mono, int serif, int bold, int italic, int *len);

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);
pdf_font_desc *pdf_load_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *obj);
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);

void pdf_print_font(fz_context *ctx, fz_output *out, pdf_font_desc *fontdesc);

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

pdf_obj *pdf_add_simple_font(fz_context *ctx, pdf_document *doc, fz_font *font, int encoding);
pdf_obj *pdf_add_cid_font(fz_context *ctx, pdf_document *doc, fz_font *font);
pdf_obj *pdf_add_cjk_font(fz_context *ctx, pdf_document *doc, fz_font *font, int script, int wmode, int serif);

int pdf_font_writing_supported(fz_font *font);

#endif