Transparent Blitting

This is a discussion on Transparent Blitting within the Windows Programming forums, part of the Platform Specific Boards category; I've completely forgotten how to blit to a dc using a mask... can someone please help me?! Things I need ...

  1. #1
    Registered User
    Join Date
    Aug 2001
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    Melbourne, Australia
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    Unhappy Transparent Blitting

    I've completely forgotten how to blit to a dc using a mask... can someone please help me?! Things I need to know:

    - Is the background of the main image black or white?
    - Is the background of the mask image black or white?
    - Required blitting operations in correct order.

    Thanks a million you guys (and girls) rule as always!

    -out-
    Jeff
    psychobrat at gmail

  2. #2
    Registered User dizolve's Avatar
    Join Date
    Dec 2002
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    68
    (From theForger)

    The background of the main image is black, the background of the mask is white.

    Code:
    SelectObject(hdcMem, g_hbmMask);
    BitBlt(hdc, 0, 0, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCAND);
    
    SelectObject(hdcMem, g_hbmBall);
    BitBlt(hdc, 0, bm.bmHeight, bm.bmWidth, bm.bmHeight, hdcMem, 0, 0, SRCPAINT);
    Hope this helps.

  3. #3
    Registered User
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    Aug 2001
    Location
    Melbourne, Australia
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    Talking

    Thanks heaps - that's exactly what i was after.

    YOU RULE!

    -out-
    PsychoBrat

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