--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/include/mupdf/fitz/separation.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,138 @@
+// Copyright (C) 2004-2021 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_FITZ_SEPARATION_H
+#define MUPDF_FITZ_SEPARATION_H
+
+#include "mupdf/fitz/system.h"
+#include "mupdf/fitz/context.h"
+#include "mupdf/fitz/color.h"
+
+/**
+	A fz_separation structure holds details of a set of separations
+	(such as might be used on within a page of the document).
+
+	The app might control the separations by enabling/disabling them,
+	and subsequent renders would take this into account.
+*/
+
+enum
+{
+	FZ_MAX_SEPARATIONS = 64
+};
+
+typedef struct fz_separations fz_separations;
+
+typedef enum
+{
+	/* "Composite" separations are rendered using process
+	 * colors using the equivalent colors */
+	FZ_SEPARATION_COMPOSITE = 0,
+	/* Spot colors are rendered into their own spot plane. */
+	FZ_SEPARATION_SPOT = 1,
+	/* Disabled colors are not rendered at all in the final
+	 * output. */
+	FZ_SEPARATION_DISABLED = 2
+} fz_separation_behavior;
+
+/**
+	Create a new separations structure (initially empty)
+*/
+fz_separations *fz_new_separations(fz_context *ctx, int controllable);
+
+/**
+	Increment the reference count for a separations structure.
+	Returns the same pointer.
+
+	Never throws exceptions.
+*/
+fz_separations *fz_keep_separations(fz_context *ctx, fz_separations *sep);
+
+/**
+	Decrement the reference count for a separations structure.
+	When the reference count hits zero, the separations structure
+	is freed.
+
+	Never throws exceptions.
+*/
+void fz_drop_separations(fz_context *ctx, fz_separations *sep);
+
+/**
+	Add a separation (null terminated name, colorspace)
+*/
+void fz_add_separation(fz_context *ctx, fz_separations *sep, const char *name, fz_colorspace *cs, int cs_channel);
+
+/**
+	Add a separation with equivalents (null terminated name,
+	colorspace)
+
+	(old, deprecated)
+*/
+void fz_add_separation_equivalents(fz_context *ctx, fz_separations *sep, uint32_t rgba, uint32_t cmyk, const char *name);
+
+/**
+	Control the rendering of a given separation.
+*/
+void fz_set_separation_behavior(fz_context *ctx, fz_separations *sep, int separation, fz_separation_behavior behavior);
+
+/**
+	Test for the current behavior of a separation.
+*/
+fz_separation_behavior fz_separation_current_behavior(fz_context *ctx, const fz_separations *sep, int separation);
+
+const char *fz_separation_name(fz_context *ctx, const fz_separations *sep, int separation);
+int fz_count_separations(fz_context *ctx, const fz_separations *sep);
+
+/**
+	Return the number of active separations.
+*/
+int fz_count_active_separations(fz_context *ctx, const fz_separations *seps);
+
+/**
+	Compare 2 separations structures (or NULLs).
+
+	Return 0 if identical, non-zero if not identical.
+*/
+int fz_compare_separations(fz_context *ctx, const fz_separations *sep1, const fz_separations *sep2);
+
+
+/**
+	Return a separations object with all the spots in the input
+	separations object that are set to composite, reset to be
+	enabled. If there ARE no spots in the object, this returns
+	NULL. If the object already has all its spots enabled, then
+	just returns another handle on the same object.
+*/
+fz_separations *fz_clone_separations_for_overprint(fz_context *ctx, fz_separations *seps);
+
+/**
+	Convert a color given in terms of one colorspace,
+	to a color in terms of another colorspace/separations.
+*/
+void fz_convert_separation_colors(fz_context *ctx, fz_colorspace *src_cs, const float *src_color, fz_separations *dst_seps, fz_colorspace *dst_cs, float *dst_color, fz_color_params color_params);
+
+/**
+	Get the equivalent separation color in a given colorspace.
+*/
+void fz_separation_equivalent(fz_context *ctx, const fz_separations *seps, int idx, fz_colorspace *dst_cs, float *dst_color, fz_colorspace *prf, fz_color_params color_params);
+
+#endif