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

/** Interface to control a sprite object.<p>

    This is the basic interface to control a sprite object on a
    XSpriteCanvas. Sprites are moving, back-buffered
    objects.<p>
 */
interface XSprite : ::com::sun::star::uno::XInterface
{
    /** Set overall transparency of the sprite.<p>

        This method is useful for e.g. fading in/out of animations.<p>

        Please note that if this sprite is not animated, the
        associated XSpriteCanvas does not update changed
        sprites automatically, but has to be told to do so via
        XSpriteCanvas::updateScreen().<p>

        @param nAlpha
        New global alpha value to composite this sprite with the
        background. Valid range is [0,1].

        @throws com::sun::star::lang::IllegalArgumentException
        if nAlpha is not within the permissible range.
     */
    void setAlpha( [in] double nAlpha )
        raises (com::sun::star::lang::IllegalArgumentException);


    /** Move sprite to the specified position.<p>

        The position specified here is first transformed by the
        combined view and render transformation. The resulting
        position is then used as the output position (also in device
        coordinates) of the rendered sprite content.<p>

        Please note that if this sprite is not animated, the
        associated XSpriteCanvas does not update changed sprites
        automatically, but has to be told to do so via
        XSpriteCanvas::updateScreen().<p>

        @param aNewPos
        The new position, in user coordinate space, to move the sprite to.

        @param aViewState
        The view state to be used when interpreting aNewPos.

        @param aRenderState
        The render state to be used when interpreting aNewPos.

        @throws com::sun::star::lang::IllegalArgumentException
        if one of the view and render state parameters are outside the
        specified range.
     */
    void move( [in] ::com::sun::star::geometry::RealPoint2D aNewPos, [in] ViewState aViewState, [in] RenderState aRenderState )
        raises (com::sun::star::lang::IllegalArgumentException);


    /** Apply a local transformation to the sprite.<p>

        The given transformation matrix locally transforms the sprite
        shape. If this transformation contains translational
        components, be aware that sprite content moved beyond the
        sprite area (a box from (0,0) to (spriteWidth,spriteHeight))
        might (but need not) be clipped. Use
        XSprite::move() to change the sprite location
        on screen. The canvas implementations are free, if they have a
        cached representation of the sprite at hand, to transform only
        this cached representation (e.g. a bitmap), instead of
        re-rendering the sprite from first principles. This is usually
        the case for an implementation of a XCustomSprite
        interface, since it typically has no other cached pictorial
        information at hand.<p>

        Please note that if this sprite is not animated, the
        associated XSpriteCanvas does not update changed
        sprites automatically, but has to be told to do so via
        XSpriteCanvas::updateScreen().<p>

        @param aTransformation
        The transformation to apply to the sprite shape.

        @throws com::sun::star::lang::IllegalArgumentException
        if the given transformation matrix is singular.
     */
    void transform( [in] com::sun::star::geometry::AffineMatrix2D aTransformation )
        raises (com::sun::star::lang::IllegalArgumentException);


    /** Apply a clipping to the shape output.<p>

        The given clip poly-polygon is always interpreted in device
        coordinate space. As the sprite has its own local coordinate
        system, with its origin on screen being equal to its current
        position, the clip poly-polygon's origin will always coincide
        with the sprite's origin. Furthermore, if any sprite
        transformation is set via transform(), the clip is subject to
        this transformation, too. The implementation is free, if it
        has a cached representation of the sprite at hand, to
        clip-output only this cached representation (e.g. a bitmap),
        instead of re-rendering the sprite from first principles. This
        is usually the case for an implementation of a
        XCustomSprite interface, since it typically has
        no other cached pictorial information at hand.<p>

        Please note that if this sprite is not animated, the
        associated XSpriteCanvas does not update changed
        sprites automatically, but has to be told to do so via
        XSpriteCanvas::updateScreen().<p>

        Specifying an empty interface denotes no clipping,
        i.e. everything contained in the sprite will be visible
        (subject to device-dependent constraints, of
        course). Specifying an empty XPolyPolygon2D, i.e. a
        poly-polygon containing zero polygons, or an XPolyPolygon2D
        with any number of empty sub-polygons, denotes the NULL
        clip. That means, nothing from the sprite will be visible.<p>

        @param aClip
        The clip poly-polygon to apply.
     */
    void clip( [in] XPolyPolygon2D aClip );


    /** Set sprite priority.<p>

        The sprite priority determines the order of rendering relative
        to all other sprites of the associated canvas. The higher the
        priority, the later will the sprite be rendered, or, in other
        words, the closer to the screen surface the sprite is shown.<p>

        @param nPriority
        New sprite priority value to serve as the sort key when
        determining sprite rendering order. Avoid NaNs and other
        irregular floating point values here, the order position for
        sprites with such a priority value is undefined.
     */
    void setPriority( [in] double nPriority );


    /** Make the sprite visible.<p>

        This method makes the sprite visible on the canvas it was
        created on.<p>
     */
    void show();


    /** Make the sprite invisible.<p>

        This method makes the sprite invisible.<p>
     */
    void hide();

};

}; }; }; };

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