90 Degree Rotation Blt

This is a discussion on 90 Degree Rotation Blt within the Windows Programming forums, part of the Platform Specific Boards category; I'm trying to do a 90 degree rotation blt, but I can't seem to get it working. HRESULT hr; RECT ...

  1. #1
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    Question 90 Degree Rotation Blt

    I'm trying to do a 90 degree rotation blt, but I can't seem to get it working.


    HRESULT hr;
    RECT scRect, destRect;
    DDBLTFX ddBltFX;

    scRect.left = (124*frame); //frame is a class member
    scRect.right = scRect.left + 124;
    scRect.top = (248*move); //move is a class member
    scRect.bottom = scRect.top + 248;

    destRect.left = 300;
    destRect.right = destRect.left + 124;
    destRect.top = 150;
    destRect.bottom = destRect.top + 248;

    ddBltFX.dwSize = sizeof( DDBLTFX );
    ddBltFX.dwDDFX = DDBLTFX_ROTATE90;
    ddBltFX.dwRotationAngle = 90;

    if(FAILED(hr = pDD7temp->Blt( &destRect, pDD7Surface, &scRect, DDBLT_KEYSRC | DDBLT_WAIT | DDBLT_DDFX, &ddBltFX)) )
    return;

    Does anyone have a simple walkthrough for rotation blts in DirectX7? Or maybe just an answer to my question?

    Thanks-
    Asmo1986

  2. #2
    Used Registerer jdinger's Avatar
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    http://www.leunen.com/cbuilder/rotbmp.html

    You should be able to adapt this by locking the surface and manipulating the pixels.

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