77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
// Copyright (C) 2004-2021 Artifex Software, Inc.
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//
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// This file is part of MuPDF.
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//
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// MuPDF is free software: you can redistribute it and/or modify it under the
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// terms of the GNU Affero General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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// details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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//
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// Alternative licensing terms are available from the licensor.
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// For commercial licensing, see <https://www.artifex.com/> or contact
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// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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// CA 94129, USA, for further information.
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#ifndef MUPDF_FITZ_TRANSITION_H
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#define MUPDF_FITZ_TRANSITION_H
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#include "mupdf/fitz/system.h"
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#include "mupdf/fitz/pixmap.h"
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/* Transition support */
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enum {
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FZ_TRANSITION_NONE = 0, /* aka 'R' or 'REPLACE' */
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FZ_TRANSITION_SPLIT,
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FZ_TRANSITION_BLINDS,
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FZ_TRANSITION_BOX,
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FZ_TRANSITION_WIPE,
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FZ_TRANSITION_DISSOLVE,
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FZ_TRANSITION_GLITTER,
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FZ_TRANSITION_FLY,
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FZ_TRANSITION_PUSH,
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FZ_TRANSITION_COVER,
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FZ_TRANSITION_UNCOVER,
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FZ_TRANSITION_FADE
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};
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typedef struct
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{
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int type;
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float duration; /* Effect duration (seconds) */
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/* Parameters controlling the effect */
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int vertical; /* 0 or 1 */
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int outwards; /* 0 or 1 */
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int direction; /* Degrees */
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/* Potentially more to come */
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/* State variables for use of the transition code */
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int state0;
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int state1;
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} fz_transition;
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/**
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Generate a frame of a transition.
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tpix: Target pixmap
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opix: Old pixmap
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npix: New pixmap
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time: Position within the transition (0 to 256)
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trans: Transition details
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Returns 1 if successfully generated a frame.
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Note: Pixmaps must include alpha.
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*/
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int fz_generate_transition(fz_context *ctx, fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time, fz_transition *trans);
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#endif
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