--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/include/mupdf/pdf/resource.h	Mon Sep 15 11:44:09 2025 +0200
@@ -0,0 +1,144 @@
+// 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_RESOURCE_H
+#define MUPDF_PDF_RESOURCE_H
+
+#include "mupdf/fitz/font.h"
+#include "mupdf/fitz/image.h"
+#include "mupdf/fitz/shade.h"
+#include "mupdf/fitz/store.h"
+#include "mupdf/pdf/object.h"
+
+void pdf_store_item(fz_context *ctx, pdf_obj *key, void *val, size_t itemsize);
+void *pdf_find_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
+void pdf_remove_item(fz_context *ctx, fz_store_drop_fn *drop, pdf_obj *key);
+void pdf_empty_store(fz_context *ctx, pdf_document *doc);
+void pdf_purge_locals_from_store(fz_context *ctx, pdf_document *doc);
+void pdf_purge_object_from_store(fz_context *ctx, pdf_document *doc, int num);
+
+/*
+ * Structures used for managing resource locations and avoiding multiple
+ * occurrences when resources are added to the document. The search for existing
+ * resources will be performed when we are first trying to add an item. Object
+ * refs are stored in a fz_hash_table structure using a hash of the md5 sum of
+ * the data, enabling rapid lookup.
+ */
+
+enum { PDF_SIMPLE_FONT_RESOURCE=1, PDF_CID_FONT_RESOURCE=2, PDF_CJK_FONT_RESOURCE=3 };
+enum { PDF_SIMPLE_ENCODING_LATIN, PDF_SIMPLE_ENCODING_GREEK, PDF_SIMPLE_ENCODING_CYRILLIC };
+
+/* The contents of this structure are defined publicly just so we can
+ * define this on the stack. */
+typedef struct
+{
+	unsigned char digest[16];
+	int type;
+	int encoding;
+	int local_xref;
+} pdf_font_resource_key;
+
+typedef struct
+{
+	unsigned char digest[16];
+	int local_xref;
+} pdf_colorspace_resource_key;
+
+pdf_obj *pdf_find_font_resource(fz_context *ctx, pdf_document *doc, int type, int encoding, fz_font *item, pdf_font_resource_key *key);
+pdf_obj *pdf_insert_font_resource(fz_context *ctx, pdf_document *doc, pdf_font_resource_key *key, pdf_obj *obj);
+pdf_obj *pdf_find_colorspace_resource(fz_context *ctx, pdf_document *doc, fz_colorspace *item, pdf_colorspace_resource_key *key);
+pdf_obj *pdf_insert_colorspace_resource(fz_context *ctx, pdf_document *doc, pdf_colorspace_resource_key *key, pdf_obj *obj);
+void pdf_drop_resource_tables(fz_context *ctx, pdf_document *doc);
+void pdf_purge_local_resources(fz_context *ctx, pdf_document *doc);
+
+typedef struct pdf_function pdf_function;
+
+void pdf_eval_function(fz_context *ctx, pdf_function *func, const float *in, int inlen, float *out, int outlen);
+pdf_function *pdf_keep_function(fz_context *ctx, pdf_function *func);
+void pdf_drop_function(fz_context *ctx, pdf_function *func);
+size_t pdf_function_size(fz_context *ctx, pdf_function *func);
+pdf_function *pdf_load_function(fz_context *ctx, pdf_obj *ref, int in, int out);
+
+fz_colorspace *pdf_document_output_intent(fz_context *ctx, pdf_document *doc);
+fz_colorspace *pdf_load_colorspace(fz_context *ctx, pdf_obj *obj);
+int pdf_is_tint_colorspace(fz_context *ctx, fz_colorspace *cs);
+
+fz_shade *pdf_load_shading(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
+void pdf_sample_shade_function(fz_context *ctx, float *samples, int n, int funcs, pdf_function **func, float t0, float t1);
+
+/**
+	Function to recolor a single color from a shade.
+*/
+typedef void (pdf_recolor_vertex)(fz_context *ctx, void *opaque, fz_colorspace *dst_cs, float *d, fz_colorspace *src_cs, const float *src);
+
+/**
+	Function to handle recoloring a shade.
+
+	Called with src_cs from the shade. If no recoloring is required, return NULL. Otherwise
+	fill in *dst_cs, and return a vertex recolorer.
+*/
+typedef pdf_recolor_vertex *(pdf_shade_recolorer)(fz_context *ctx, void *opaque, fz_colorspace *src_cs, fz_colorspace **dst_cs);
+
+/**
+	Recolor a shade.
+*/
+pdf_obj *pdf_recolor_shade(fz_context *ctx, pdf_obj *shade, pdf_shade_recolorer *reshade, void *opaque);
+
+fz_image *pdf_load_inline_image(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *dict, fz_stream *file);
+int pdf_is_jpx_image(fz_context *ctx, pdf_obj *dict);
+
+fz_image *pdf_load_image(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
+
+pdf_obj *pdf_add_image(fz_context *ctx, pdf_document *doc, fz_image *image);
+
+pdf_obj *pdf_add_colorspace(fz_context *ctx, pdf_document *doc, fz_colorspace *cs);
+
+typedef struct
+{
+	fz_storable storable;
+	int ismask;
+	float xstep;
+	float ystep;
+	fz_matrix matrix;
+	fz_rect bbox;
+	pdf_document *document;
+	pdf_obj *resources;
+	pdf_obj *contents;
+	int id; /* unique ID for caching rendered tiles */
+} pdf_pattern;
+
+pdf_pattern *pdf_load_pattern(fz_context *ctx, pdf_document *doc, pdf_obj *obj);
+pdf_pattern *pdf_keep_pattern(fz_context *ctx, pdf_pattern *pat);
+void pdf_drop_pattern(fz_context *ctx, pdf_pattern *pat);
+
+pdf_obj *pdf_new_xobject(fz_context *ctx, pdf_document *doc, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *buffer);
+void pdf_update_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *xobj, fz_rect bbox, fz_matrix mat, pdf_obj *res, fz_buffer *buffer);
+
+pdf_obj *pdf_xobject_resources(fz_context *ctx, pdf_obj *xobj);
+fz_rect pdf_xobject_bbox(fz_context *ctx, pdf_obj *xobj);
+fz_matrix pdf_xobject_matrix(fz_context *ctx, pdf_obj *xobj);
+int pdf_xobject_isolated(fz_context *ctx, pdf_obj *xobj);
+int pdf_xobject_knockout(fz_context *ctx, pdf_obj *xobj);
+int pdf_xobject_transparency(fz_context *ctx, pdf_obj *xobj);
+fz_colorspace *pdf_xobject_colorspace(fz_context *ctx, pdf_obj *xobj);
+
+#endif