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ryan_rowell
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access photo aspect ratio (square, portrait, landscape)

Apr 2, 2012 11:52 AM

Tags: #lightroom #sdk #lua

I need to know what the aspect ratio of an image is so i can apply css properties to it depending on it being square, landscape, or portrait. is there a propery that will return this information?

827 Views   4 Replies   Latest reply: clvrmnky, Apr 8, 2012 12:41 PM
 
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  • Rob Cole
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    1. Rob Cole,
    Apr 2, 2012 1:00 PM   in reply to ryan_rowell
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    photo:getRawMetadata( 'croppedDimensions' )

     
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  • ryan_rowell
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    2. ryan_rowell,
    Apr 2, 2012 1:47 PM   in reply to Rob Cole
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    so?:

     

    local function whatOrientation ( imageID )

     

    local variableName = photo:getRawMetadata('croppedDimensions')

    local outPutName = nil

     

    if variableName.width > variableName.height then

         outPutName = "landscape"

    else

         outPutName = "portrait"

    end

     

    if variableName.width == variableName.height then

         outPutName = "square"

    end

     

    return outPutName

     

    end

     

     

    then use it in the galleryinfo.lrweb somewhow?

     

    I am beyond new to using lua, and have a 15 year ago background in C that was never continued so I am way out of practice.

     

    my goal is to set each thumbnail generated from the web gallery with a class selector for my css styles. I think what i am looking to do would be best setup in javascript but i would love if lightroom (lua in this case) can take some of the load off. so in the end i might have a gallery with 20 images, and 20 thumbnails, each thumbnail depending on its orientation I would set the selector when the gallery is generated.  Any theory where to start or where I should be calling this function.

     

    thanks again for responding,

     

    Ryan

     
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  • Rob Cole
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    3. Rob Cole,
    Apr 2, 2012 1:59 PM   in reply to ryan_rowell
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    Hi Ryan,

     

    I'm not familiar with Lr web gallerys, but I think you've got the idea aspect-ratio/orientation-wise.

     

    Rob

     
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  • clvrmnky
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    4. clvrmnky,
    Apr 8, 2012 12:41 PM   in reply to ryan_rowell
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    You probably want to have outputName set to something valid, unless the caller can handle nil. LrPhoto:getRawMetadata() can return nil, as well, so you might want to check for nil before trying to use it.

     

    Also, note that LrPhoto:getRawMetadata() will need to be called from within an LrTask, either one you create yourself, or one provided by the SDK context you are running this in.

     
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