transition.h

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// 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
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#ifndef MUPDF_FITZ_TRANSITION_H
#define MUPDF_FITZ_TRANSITION_H
 
#include "mupdf/fitz/system.h"
#include "mupdf/fitz/pixmap.h"
 
/* Transition support */
enum {
    FZ_TRANSITION_NONE = 0, /* aka 'R' or 'REPLACE' */
    FZ_TRANSITION_SPLIT,
    FZ_TRANSITION_BLINDS,
    FZ_TRANSITION_BOX,
    FZ_TRANSITION_WIPE,
    FZ_TRANSITION_DISSOLVE,
    FZ_TRANSITION_GLITTER,
    FZ_TRANSITION_FLY,
    FZ_TRANSITION_PUSH,
    FZ_TRANSITION_COVER,
    FZ_TRANSITION_UNCOVER,
    FZ_TRANSITION_FADE
};
 
typedef struct
{
    int type;
    float duration; /* Effect duration (seconds) */
 
    /* Parameters controlling the effect */
    int vertical; /* 0 or 1 */
    int outwards; /* 0 or 1 */
    int direction; /* Degrees */
    /* Potentially more to come */
 
    /* State variables for use of the transition code */
    int state0;
    int state1;
} fz_transition;

int fz_generate_transition(fz_context *ctx, fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time, fz_transition *trans);
 
#endif