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Thread: image

  1. #1


    please tell me how to flip an image(JPEG file)? and also how to create a lumnance version of that image?

  2. #2
    Member Contributor
    Join Date
    Jan 2001

    Re: image

    flip an image? do you mean vertically and horizontally? or are you talking about something different?

  3. #3

    Re: image

    sorry, that i did not state it clearly. flip the image horizontally. thanks.

  4. #4

    Re: image

    is anyone able to help?? thanks.

  5. #5
    Senior Member OpenGL Pro
    Join Date
    Oct 2000
    Fargo, ND

    Re: image

    The hardest part of that will be reading in the raw data for the JPEG. There are libraries that can be used for this, though. (I'm not sure of any URLs offhand, I prefer to do my own image loading.)

    Once you have the raw data, you can flip it doing something like so... (pseudo-code)

    Code :
    for (int y=0; y<img.height;y++)
       for (int x=0;x<img.width/2;x++)
    Software Engineer and OpenGL enthusiast

  6. #6
    Senior Member OpenGL Guru zed's Avatar
    Join Date
    Nov 2010

    Re: image

    to flip use this when u rad the data in

    for (int y=0; y<img.height;y++)
    for (int x=0;x<img.width;x++)
    image [x + (imageheight-1-y)*imageheight ] = data

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