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MicroStation Wiki PDF File Handling
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    PDF File Handling

      Product: MicroStation
      Version: N\A
      Environment: N\A
      Area: Installation
      Subarea: General

    Background

    Raster Manager is able to attach PDF file of any kind. The PDF file is rasterized prior to being displayed using the PDF Library SDK (Software Development Kit) from Adobe. This ensures that the PDF file appears as if it was open by Adobe Acrobat Reader.

    Rasterization

    The process of rasterizing a PDF for displaying as a raster is depicted below.

    Raster Manager - PDF Rasterization
    1. MicroStation makes a request to Raster Manager to display the PDF's raster data in the current view.
    2. Based on the physical units occupied by the PDF in the current view and the PDF 1:1 DPI,  Raster Manager determines the correct rasterization DPI. The DPI for the 1:1 resolution is approximately 96. So, for a standard 8.5 by 11 inches PDF, the size of the raster describing the 1:1 resolution will be approximately 791 x 1056 pixels. The rasterization DPI is variable, so that it increases when zooming in and decreases when zooming out the PDF.
    3. Adobe's PDF Library SDK reads the vector and raster data in the PDF file and creates an image representing this data.
    4. Adobe's PDF Library SDK returns the raster which is a representation of the raster and vector data in the area of the PDF file shown in the view.
    5. Raster Manager sends the raster generated by the PDF Library SDK to the proper MicroStation's view.

    IMPORTANT : Note that Raster Manager never decimates the raster data obtained from the PDF,  but changes the rasterization DPI specified to the PDF Library SDK. This ensures that vector data like thin lines don't disappear at lower resolutions.

     

     

     

     

     

      

    Layer Selection

    Some pages of a PDF can have multiple layers. With Raster Manager, it's possible to choose which layers are displayed via the Layer Display dialog. Element Info for the raster element > Display Print  > Layers.

    The Layer Display dialog simply lists the layers for the selected PDF page with an associated check box that's used to determine if the layer should be displayed or not.

    Raster Manager - Layer Display Dialog Box

    Annotation Visualization

    Some pages of a PDF can have annotations containing text, video, sound, and so forth. Raster Manager only supports those annotations containing text.

     Raster Manager - PDF Annotation Exploration

    The animated GIF at the left shows how to explore annotation found on a PDF's page.

    It this animated GIF the star represents an annotation. As you can see, when the cursor moves over the annotation, it gets highlighted.

    When left clicking the annotation a bubble box appears showing the text for the clicked annotation.

    Note that to be able to explore annotations you must first select the annotation exploration tool which can be located here: Raster Manager > Display > Annotations > Explore.

    See also

    Other language sources

      Original Author: Tim Hickman
    • Raster
    • File handling
    • Manager
    • PDF
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    • Tim Hickman Created by Tim Hickman
    • When: Fri, Sep 6 2013 1:34 PM
    • Andrew Bell Last revision by Bentley Colleague Andrew Bell
    • When: Mon, Jun 26 2017 12:24 AM
    • Revisions: 3
    • Comments: 0
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