--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/source/pdf/pdf-xobject.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,133 @@
+// Copyright (C) 2004-2024 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.
+
+#include "mupdf/fitz.h"
+#include "mupdf/pdf.h"
+
+pdf_obj *
+pdf_xobject_resources(fz_context *ctx, pdf_obj *xobj)
+{
+	return pdf_dict_get(ctx, xobj, PDF_NAME(Resources));
+}
+
+fz_rect
+pdf_xobject_bbox(fz_context *ctx, pdf_obj *xobj)
+{
+	return pdf_dict_get_rect(ctx, xobj, PDF_NAME(BBox));
+}
+
+fz_matrix
+pdf_xobject_matrix(fz_context *ctx, pdf_obj *xobj)
+{
+	return pdf_dict_get_matrix(ctx, xobj, PDF_NAME(Matrix));
+}
+
+int pdf_xobject_isolated(fz_context *ctx, pdf_obj *xobj)
+{
+	pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
+	if (group)
+		return pdf_dict_get_bool(ctx, group, PDF_NAME(I));
+	return 0;
+}
+
+int pdf_xobject_knockout(fz_context *ctx, pdf_obj *xobj)
+{
+	pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
+	if (group)
+		return pdf_dict_get_bool(ctx, group, PDF_NAME(K));
+	return 0;
+}
+
+int pdf_xobject_transparency(fz_context *ctx, pdf_obj *xobj)
+{
+	pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
+	if (group)
+		if (pdf_name_eq(ctx, pdf_dict_get(ctx, group, PDF_NAME(S)), PDF_NAME(Transparency)))
+			return 1;
+	return 0;
+}
+
+fz_colorspace *
+pdf_xobject_colorspace(fz_context *ctx, pdf_obj *xobj)
+{
+	pdf_obj *group = pdf_dict_get(ctx, xobj, PDF_NAME(Group));
+	if (group)
+	{
+		pdf_obj *cs = pdf_dict_get(ctx, group, PDF_NAME(CS));
+		if (cs)
+		{
+			fz_colorspace *colorspace = NULL;
+			fz_try(ctx)
+				colorspace = pdf_load_colorspace(ctx, cs);
+			fz_catch(ctx)
+			{
+				fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
+				fz_rethrow_if(ctx, FZ_ERROR_SYSTEM);
+				fz_report_error(ctx);
+				fz_warn(ctx, "Ignoring XObject blending colorspace.");
+			}
+
+			if (!fz_is_valid_blend_colorspace(ctx, colorspace))
+			{
+				fz_warn(ctx, "Ignoring invalid XObject blending colorspace: %s.", fz_colorspace_name(ctx, colorspace));
+				fz_drop_colorspace(ctx, colorspace);
+				return NULL;
+			}
+			return colorspace;
+		}
+	}
+	return NULL;
+}
+
+pdf_obj *
+pdf_new_xobject(fz_context *ctx, pdf_document *doc, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *contents)
+{
+	pdf_obj *ind = NULL;
+	pdf_obj *form = pdf_new_dict(ctx, doc, 5);
+	fz_try(ctx)
+	{
+		pdf_dict_put(ctx, form, PDF_NAME(Type), PDF_NAME(XObject));
+		pdf_dict_put(ctx, form, PDF_NAME(Subtype), PDF_NAME(Form));
+		pdf_dict_put_rect(ctx, form, PDF_NAME(BBox), bbox);
+		pdf_dict_put_matrix(ctx, form, PDF_NAME(Matrix), matrix);
+		if (res)
+			pdf_dict_put(ctx, form, PDF_NAME(Resources), res);
+		ind = pdf_add_stream(ctx, doc, contents, form, 0);
+	}
+	fz_always(ctx)
+		pdf_drop_obj(ctx, form);
+	fz_catch(ctx)
+		fz_rethrow(ctx);
+	return ind;
+}
+
+void
+pdf_update_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *form, fz_rect bbox, fz_matrix matrix, pdf_obj *res, fz_buffer *contents)
+{
+	pdf_dict_put_rect(ctx, form, PDF_NAME(BBox), bbox);
+	pdf_dict_put_matrix(ctx, form, PDF_NAME(Matrix), matrix);
+	if (res)
+		pdf_dict_put(ctx, form, PDF_NAME(Resources), res);
+	else
+		pdf_dict_del(ctx, form, PDF_NAME(Resources));
+	pdf_update_stream(ctx, doc, form, contents, 0);
+}