offapi/com/sun/star/drawing/XSlideRenderer.idl

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  19
  20
  21 module com { module sun { module star { module drawing {
  22
  23 /** Create preview bitmaps for single slides.
  24 */
  25 interface XSlideRenderer
  26 {
  27     /** Create a preview for the given slide that has the same aspect ratio
  28         as the page and is as large as possible but not larger than the
  29         specified size.
  30
  31         The reason for not using the given size directly as preview size and
  32         thus possibly changing the aspect ratio is that
  33         a) a different aspect ratio is not used often, and
  34         b) leaving the adaptation of the actual preview size (according to the
  35         aspect ratio of the slide) to the slide renderer is more convenient
  36         to the caller than having to this himself.
  37
  38         @param xSlide
  39             The slide for which a preview will be created.
  40         @param aMaximumPreviewPixelSize
  41             The maximum size of the preview measured in pixels.  When the
  42             aspect ratios of this size and of the given slide differ, then
  43             resulting preview will either have the width or the height of
  44             this size.
  45         @param nSuperSampleFactor
  46             When larger than the default 1 then internally a larger preview
  47             is created which, before it is returned, is scaled down to the
  48             requested size.  The intermediate size is nSuperSampleFactor
  49             times the original size.  Values larger than 1 result in higher
  50             memory consumption and longer runtime.
  51             This value is an attempt to provide some antialiasing and so to
  52             provide more readable slide previews.  May become obsolete in
  53             the future when true antialiasing support will be integrated.
  54     */
  55     com::sun::star::awt::XBitmap createPreview (
  56         [in] XDrawPage xSlide,
  57         [in] com::sun::star::awt::Size aMaximumPreviewPixelSize,
  58         [in] short nSuperSampleFactor);
  59
  60     /** Exactly the same functionality as createPreview(),
  61         only a different return type:
  62         com::sun::star::rendering::XBitmap instead
  63         of com::sun::star::awt::XBitmap.
  64         @see createPreview
  65         @param xSlide
  66             See description in #createPreview.
  67         @param aMaximumPreviewPixelSize
  68             See description in #createPreview.
  69         @param nSuperSampleFactor
  70             See description in #createPreview.
  71         @param xCanvas
  72             This canvas is used create a canvas specific bitmap.
  73     */
  74     com::sun::star::rendering::XBitmap createPreviewForCanvas (
  75         [in] XDrawPage xSlide,
  76         [in] com::sun::star::awt::Size aMaximumPreviewPixelSize,
  77         [in] short nSuperSampleFactor,
  78         [in] com::sun::star::rendering::XCanvas xCanvas);
  79
  80     /** Return a size that has the given aspect ratio and shares either the
  81         width or the height with the given maximum size.
  82         @param nSlideAspectRatio
  83             The aspect ratio must not be 0.
  84         @param aMaximumPreviewPixelSize
  85             The maximum size of the returned preview size.
  86     */
  87     com::sun::star::awt::Size calculatePreviewSize (
  88         [in] double nSlideAspectRatio,
  89         [in] com::sun::star::awt::Size aMaximumPreviewPixelSize);
  90 };
  91
  92 }; }; }; }; // ::com::sun::star::drawing
  93
  94 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */