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How to avoid outlines with transparent Impressario sprites - Support Center
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Support Center » Knowledgebase » INM Impressario for Authorware » How to avoid outlines with transparent Impressario sprites
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 How to avoid outlines with transparent Impressario sprites
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Impressario for AuthorwareAllDisplayAll

Summary

By using Authorware's Mode property, you can make an Impressario sprite transparent or semi-transparent so that underlying graphical elements and background images are visible through the PDF document.

When transparent documents, containing anti-aliased text and images, are displayed against a contrasting background color, there are often noticeable outlines left surrounding the text or graphics. This result is normal when using transparency with any bitmap whose background color is different from the color behind the object in Authorware.

Solution

There is a workaround solution. If you call the Impressario global method IMP_SetSmoothing() you can selectively turn on or off the anti-aliasing of text, bitmap images, or line art independently. This removes the outlines, but your text and line art will not be aliased.

Example:

   -- turn off aniti-aliasing before displaying transparent document
    IMP_SetSmoothing([#SmoothText:False, #SmoothLineArt:False, #SmoothImages:False])

   -- turn it back on before displaying an opaque document
    IMP_SetSmoothing([#SmoothText:True, #SmoothLineArt:True])

Notes

 This method is global, so the properties you set apply to all Impressario sprites on screen.



Article Details
Article ID: 31
Created On: 30 May 2006 03:37 PM

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