--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/include/mupdf/pdf/font.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,168 @@
+// Copyright (C) 2004-2025 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#ifndef MUPDF_PDF_FONT_H
+#define MUPDF_PDF_FONT_H
+
+#include "mupdf/pdf/cmap.h"
+#include "mupdf/fitz/device.h"
+#include "mupdf/fitz/font.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
+{
+	unsigned short lo;
+	unsigned short hi;
+	int w;	/* type3 fonts can be big! */
+} pdf_hmtx;
+
+typedef struct
+{
+	unsigned short lo;
+	unsigned short hi;
+	short x;
+	short y;
+	short w;
+} pdf_vmtx;
+
+typedef struct
+{
+	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;
+	int t3loading;
+} pdf_font_desc;
+
+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, void *fill_gstate, void *stroke_gstate);
+
+pdf_obj *pdf_add_simple_font(fz_context *ctx, pdf_document *doc, fz_font *font, int encoding);
+
+/*
+	Creates CID font with Identity-H CMap and a ToUnicode CMap that
+	is created by using the TTF cmap table "backwards" to go from
+	the GID to a Unicode value.
+
+	We can possibly get width information that may have been embedded
+	in the PDF /W array (or W2 if vertical text)
+*/
+pdf_obj *pdf_add_cid_font(fz_context *ctx, pdf_document *doc, fz_font *font);
+
+/*
+	Add a non-embedded UTF16-encoded CID-font for the CJK scripts:
+	CNS1, GB1, Japan1, or Korea1
+*/
+pdf_obj *pdf_add_cjk_font(fz_context *ctx, pdf_document *doc, fz_font *font, int script, int wmode, int serif);
+
+/*
+	Add a substitute font for any script.
+*/
+pdf_obj *pdf_add_substitute_font(fz_context *ctx, pdf_document *doc, fz_font *font);
+
+int pdf_font_writing_supported(fz_context *ctx, fz_font *font);
+
+/*
+	Subset fonts by scanning the document to establish usage, and then
+	rewriting the font files.
+
+	Calling with pages_len == 0 means do the whole document.
+
+	EXPERIMENTAL AND SUBJECT TO CHANGE.
+*/
+void pdf_subset_fonts(fz_context *ctx, pdf_document *doc, int pages_len, const int *pages);
+
+#endif