/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


module com { module sun { module star { module rendering {

/* TODO: Have a property set here, to easily extend attributes? Think
   that's advisable, because animations change the most. Implement
   that with multiple inheritance interface types, please, not with
   service description.
*/

/** This interface defines an animation sequence.<p>

    This interface must be implemented by every animation object. It
    is used by the XCanvas interface to render generic
    animations.<p>

    @since OOo 2.0
 */
interface XAnimation : ::com::sun::star::uno::XInterface
{
    /** Render the animation content at time t into the specified
        canvas.<p>

        Note that it is perfectly legal to e.g. map t in a nonlinear
        fashion to internal frames, for example to achieve
        acceleration or deceleration effects. It is required that the
        render method has const semantics, i.e. when called with the
        same parameter set, identical output must be generated. This
        is because e.g. a Sprite might decide arbitrarily to render an
        animation once and cache the result, or repaint it via
        XAnimation::render every time.<p>

        The rendered content, although, must be exactly the same for
        identical viewState, canvas and t values. Or, for that
        matters, must call the same canvas methods in the same order
        with the same parameter sets, for identical viewState and t
        values. Furthermore, when viewState has the identity
        transformation set, rendered output must be contained in a
        rectangle with upper left corner at (0,0) and width and height
        given by the AnimationAttributes' untransformedSize
        member. Any content exceeding this box might get clipped off.<p>

        @param canvas
        The target canvas to render this animation to.

        @param viewState
        The view state to be used when rendering this animation to the
        target canvas. The view transformation matrix must not be
        singular.

        @param t
        Time instant for which animation content is requested. The
        range must always be [0,1], where 0 denotes the very beginning, and
        1 the end of the animation sequence.

        @throws com::sun::star::lang::IllegalArgumentException
        if one of the passed parameters does not lie in the specified,
        permissible range.
     */
    void                    render( [in] XCanvas canvas, [in] ViewState viewState, [in] double t )
        raises (com::sun::star::lang::IllegalArgumentException);


    /** Request the attribute information for this animation.<p>

        This method returns the AnimationAttributes
        structure, which defines more closely how to play this
        animation.<p>

        @returns the requested AnimationAttributes
        structure.
     */
    AnimationAttributes     getAnimationAttributes();
};

}; }; }; };

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
