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Thread: Masks?

  1. Jul 11th, 2001, 11:32 AM #1
    Spie
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    Unhappy Masks?

    I need some help with masks. I want to make a sprite with transperent areas around it. I know how to make the mask, but I don't know how to make the picture transperent when the prgram is running. Please help
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  2. Jul 11th, 2001, 02:26 PM #2
    Arie
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    It's like this (simple):

    - Draw one picture (BMP) with a black (rgb(0,0,0)) background.
    - With the same pic you color all the not(BLACK) pixels
    in BLACK, and the original Background black, turn it to
    WHITE (rgb(255,255,255)).
    - When you have those two pics draw them with BitBlt like this:
    BitBlt TheOneWithBlackBack.hdc,...,vbSrcAnd
    BitBlt TheOneWithWhiteBack.hdc,...,vbSrcInvert


    When the black & the white backgrounds gets into a transparent back.
    That's all.

    Arie. (mag.up.co.il)
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  3. Jul 11th, 2001, 05:47 PM #3
    Sastraxi
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    There's a full bitblt tutorial here:
    http://vbden.tripod.com/articles/invmask.htm
    All contents of the above post that aren't somebody elses are mine, not the property of some media corporation.
    (Just a heads-up)
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