--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/include/mupdf/fitz/band-writer.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,117 @@
+// 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_BAND_WRITER_H
+#define MUPDF_FITZ_BAND_WRITER_H
+
+#include "mupdf/fitz/system.h"
+#include "mupdf/fitz/context.h"
+#include "mupdf/fitz/output.h"
+#include "mupdf/fitz/color.h"
+#include "mupdf/fitz/separation.h"
+
+/**
+	fz_band_writer
+*/
+typedef struct fz_band_writer fz_band_writer;
+
+/**
+	Cause a band writer to write the header for
+	a banded image with the given properties/dimensions etc. This
+	also configures the bandwriter for the format of the data to be
+	passed in future calls.
+
+	w, h: Width and Height of the entire page.
+
+	n: Number of components (including spots and alphas).
+
+	alpha: Number of alpha components.
+
+	xres, yres: X and Y resolutions in dpi.
+
+	cs: Colorspace (NULL for bitmaps)
+
+	seps: Separation details (or NULL).
+*/
+void fz_write_header(fz_context *ctx, fz_band_writer *writer, int w, int h, int n, int alpha, int xres, int yres, int pagenum, fz_colorspace *cs, fz_separations *seps);
+
+/**
+	Cause a band writer to write the next band
+	of data for an image.
+
+	stride: The byte offset from the first byte of the data
+	for a pixel to the first byte of the data for the same pixel
+	on the row below.
+
+	band_height: The number of lines in this band.
+
+	samples: Pointer to first byte of the data.
+*/
+void fz_write_band(fz_context *ctx, fz_band_writer *writer, int stride, int band_height, const unsigned char *samples);
+
+/**
+	Finishes up the output and closes the band writer. After this
+	call no more headers or bands may be written.
+*/
+void fz_close_band_writer(fz_context *ctx, fz_band_writer *writer);
+
+/**
+	Drop the reference to the band writer, causing it to be
+	destroyed.
+
+	Never throws an exception.
+*/
+void fz_drop_band_writer(fz_context *ctx, fz_band_writer *writer);
+
+/* Implementation details: subject to change. */
+
+typedef void (fz_write_header_fn)(fz_context *ctx, fz_band_writer *writer, fz_colorspace *cs);
+typedef void (fz_write_band_fn)(fz_context *ctx, fz_band_writer *writer, int stride, int band_start, int band_height, const unsigned char *samples);
+typedef void (fz_write_trailer_fn)(fz_context *ctx, fz_band_writer *writer);
+typedef void (fz_close_band_writer_fn)(fz_context *ctx, fz_band_writer *writer);
+typedef void (fz_drop_band_writer_fn)(fz_context *ctx, fz_band_writer *writer);
+
+struct fz_band_writer
+{
+	fz_drop_band_writer_fn *drop;
+	fz_close_band_writer_fn *close;
+	fz_write_header_fn *header;
+	fz_write_band_fn *band;
+	fz_write_trailer_fn *trailer;
+	fz_output *out;
+	int w;
+	int h;
+	int n;
+	int s;
+	int alpha;
+	int xres;
+	int yres;
+	int pagenum;
+	int line;
+	fz_separations *seps;
+};
+
+fz_band_writer *fz_new_band_writer_of_size(fz_context *ctx, size_t size, fz_output *out);
+#define fz_new_band_writer(C,M,O) ((M *)Memento_label(fz_new_band_writer_of_size(ctx, sizeof(M), O), #M))
+
+
+#endif