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// Copyright © 2005-2007 Jens Gulden
// Copyright © 2011-2011 Diego Elio Pettenò
// SPDX-FileCopyrightText: 2005 The unpaper authors
//
// SPDX-License-Identifier: GPL-2.0-only
#pragma once
#include <libavutil/frame.h>
#include "constants.h"
/****************************************************************************
* image processing functions *
****************************************************************************/
/* --- deskewing ---------------------------------------------------------- */
float detectRotation(AVFrame *image, Mask mask);
void rotate(const float radians, AVFrame *source, AVFrame *target);
/* --- stretching / resizing / shifting ------------------------------------ */
void stretch(int w, int h, AVFrame **image);
void resize(int w, int h, AVFrame **image);
void shift(int shiftX, int shiftY, AVFrame **image);
/* --- mask-detection ----------------------------------------------------- */
void detectMasks(AVFrame *image);
void applyMasks(Mask *masks, const int maskCount,
AVFrame *image);
/* --- wiping ------------------------------------------------------------- */
void applyWipes(Mask *area, int areaCount,
AVFrame *image);
/* --- mirroring ---------------------------------------------------------- */
void mirror(int directions, AVFrame *image);
/* --- flip-rotating ------------------------------------------------------ */
void flipRotate(int direction, AVFrame **image);
/* --- blackfilter -------------------------------------------------------- */
void blackfilter(AVFrame *image);
/* --- noisefilter -------------------------------------------------------- */
int noisefilter(AVFrame *image);
/* --- blurfilter --------------------------------------------------------- */
int blurfilter(AVFrame *image);
/* --- grayfilter --------------------------------------------------------- */
int grayfilter(AVFrame *image);
/* --- border-detection --------------------------------------------------- */
void centerMask(AVFrame *image, int center[COORDINATES_COUNT],
Mask mask);
void alignMask(Mask mask, Mask outside, AVFrame *image);
void detectBorder(int border[EDGES_COUNT], Mask outsideMask,
AVFrame *image);
void borderToMask(int border[EDGES_COUNT], Mask mask,
AVFrame *image);
void applyBorder(int border[EDGES_COUNT], AVFrame *image);
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