deskew.h

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// 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.
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#ifndef MUPDF_FITZ_DESKEW_H
#define MUPDF_FITZ_DESKEW_H
 
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/context.h"
 
enum
{
    FZ_DESKEW_BORDER_INCREASE = 0,
    FZ_DESKEW_BORDER_MAINTAIN = 1,
    FZ_DESKEW_BORDER_DECREASE = 2
};
 
fz_pixmap *fz_deskew_pixmap(fz_context *ctx,
            fz_pixmap *src,
            double degrees,
            int border);
 
/* Skew detection */
 
double fz_detect_skew(fz_context *ctx, fz_pixmap *pixmap);
 
 
#endif /* MUPDF_FITZ_DESKEW_H */