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The Alpha Software Forum Participation Guidelines

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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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Rotate JPG

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    Rotate JPG

    Mike C has pointed me to SET_ROTATE() to get me started with rotating a jpg image... thanks Mike. I just want to make sure there's no simpler way... doesn't seem so. Looks like the SET_ROTATE() will rotate an image in memory, but I can't see how to display that image in my bitmap object.

    I go get an image filename and path and save it to a field in a table. I then load that image into a bitmap object on a form.

    I'd like to push a button an have that image rotated in the object.

    It seems the only way to do this is to read the image into a blob, rotate it, and write it out again to file, then load it in again to the object. Is this right?

    I've figure out the code, thanks to many posts with code here, but it takes seconds to do... which is a long time, it seems.

    Is there anything else?

    David

    #2
    Re: Rotate JPG

    Try another tact: find a freeware or shareware graphics editor, and rotate the image and save it. Then use that on your form. You can google for the editor and find one in 5-minutes, I think.
    Peter
    AlphaBase Solutions, LLC

    [email protected]
    https://www.alphabasesolutions.com


    Comment


      #3
      Re: Rotate JPG

      Yes... kinda tried that approach with Easy Thumbnails... you can actually shell out with command line switches to get stuff done... but I didn't want to shell out to another program AND you have to pay for a license if including in an app.

      I could get my users to rotate their own photos but just so nice to be able to do so easily within Alpha. My app is currently written in VB with 3rd party Activex controls for the image stuff and the command is just something like Bitmap1.rotate = 90 and the one screen object rotates... so nice.

      Getting Activex to work under A5 is even harder than getting a photo to rotate in XBasic... I've been at it off and on forever.

      I can get it to workwith blob.from_file and file.to_blob etc. - it just takes too long to process and then re-display. I'll keep looking.

      Thanks.

      Comment


        #4
        Re: Rotate JPG

        Look at ImageMagick, it's brilliant for command line image editing, free, and can read info from the file to automatically orient it the right way up etc. http://www.imagemagick.org/script/index.php

        Comment


          #5
          Re: Rotate JPG

          Excellent... I'll give that a try.... thanks.

          Comment

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