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/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 * 
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#ifndef __com_sun_star_drawing_XSlideRenderer_idl__
#define __com_sun_star_drawing_XSlideRenderer_idl__

#ifndef __com_sun_star_awt_XBitmap_idl__
#include <com/sun/star/awt/XBitmap.idl>
#endif
#ifndef __com_sun_star_drawing_XDrawPage_idl__
#include <com/sun/star/drawing/XDrawPage.idl>
#endif
#ifndef __com_sun_star_rendering_XBitmap_idl__
#include <com/sun/star/rendering/XBitmap.idl>
#endif
#ifndef __com_sun_star_rendering_XSpriteCanvas_idl__
#include <com/sun/star/rendering/XSpriteCanvas.idl>
#endif


module com { module sun { module star { module drawing {

/** Create preview bitmaps for single slides.
*/
interface XSlideRenderer
{
    /** Create a preview for the given slide that has the same aspect ratio
        as the page and is as large as possible but not larger than the
        specified size.

        The reason for not using the given size directly as preview size and
        thus possibly changing the aspect ratio is that
        a) a different aspect ratio is not used often, and
        b) leaving the adaption of the actual preview size (according to the
        aspect ratio of the slide) to the slide renderer is more convenient
        to the caller than having to this himself.

        @param xSlide
            The slide for which a preview will be created.
        @param aMaximumPreviewPixelSize
            The maximum size of the preview measured in pixels.  When the
            aspect ratios of this size and of the given slide differ, then
            resulting preview will either have the width or the height of
            this size.
        @param nSuperSampleFactor
            When larger than the default 1 then internally a larger preview
            is created which, before it is returned, is scaled down to the
            requested size.  The intermediate size is nSuperSampleFactor
            times the original size.  Values larger than 1 result in higher
            memory consumption and longer runtime.
            This value is an attempt to provide some antialiasing and so to
            provide more readable slide previews.  May become obsolete in
            the future when true antialiasing suppport will be integrated.
    */
    com::sun::star::awt::XBitmap createPreview (
        [in] XDrawPage xSlide,
        [in] com::sun::star::awt::Size aMaximumPreviewPixelSize,
        [in] short nSuperSampleFactor);

    /** Exactly the same functionality as <member>createPreview()</member>,
        only a different return type:
        <type>com::sun::star::rendering::XBitmap</type> instead
        of <type>com::sun::star::awt::XBitmap</type>.
        @see createPreview
        @param xCanvas
            This canvas is used create a canvas specific bitmap.
    */
    com::sun::star::rendering::XBitmap createPreviewForCanvas (
        [in] XDrawPage xSlide,
        [in] com::sun::star::awt::Size aMaximumPreviewPixelSize,
        [in] short nSuperSampleFactor,
        [in] com::sun::star::rendering::XCanvas xCanvas);
    
    /** Return a size that has the given aspect ratio and shares either the
        width or the height with the given maximum size.
        @param nSlideAspectRatio
            The aspect ratio must not be 0.
        @param aMaximumPreviewPixelSize
            The maximum size of the returned preview size.
    */
    com::sun::star::awt::Size calculatePreviewSize (
        [in] double nSlideAspectRatio,
        [in] com::sun::star::awt::Size aMaximumPreviewPixelSize);
};

}; }; }; }; // ::com::sun::star::drawing

#endif