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Making an image load faster

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  • Making an image load faster

    I'm loading a 300k jpg image into the bitmap control.

    I'm loading it from the OnRowChange event of a browse and using an Action that sets the bitmap filename to the value of a field in the browse.

    It takes about 3 seconds to load. Is there any way to make the image "pop" without the 3 second delay... seems like a long time.

    David

  • #2
    Re: Making an image load faster

    try saving the .jpg as a .png and see if that makes it significantly smaller, and possibly thus faster.
    Cole Custom Programming - Terrell, Texas
    972 524 8714
    martin_w_cole@msn.com

    ____________________
    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

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    • #3
      Re: Making an image load faster

      One possible solution is to load it into BLOB variable, and cache the last n values that you need to display. If the value is not one of those that are current, then load it conditionally.
      Regards,

      Ira J. Perlow
      Computer Systems Design


      CSDA A5 Products
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      • #4
        Re: Making an image load faster

        Thanks Guys... I can't convert to PNG - images being loaded by app users. They download from cameras and I can't see them converting hundreds of images all the time. I'll try loading into a BLOB.

        David

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        • #5
          Re: Making an image load faster

          Presumably, you need to use a browse. Otherwise, another solution is to display multiple images in a webcontent supercontrol. This will be significantly faster.

          Comment


          • #6
            Re: Making an image load faster

            Looks like A5 can't handle processing images very quickly. I've got a table with the full path to jpg images. When I click on a browse row the image takes seconds to display instead of just popping up. To browse through a list of 10 or 20 images is agonizing. Coming from VB and Access I'm used to a pretty much instant display. Too bad.

            David

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            • #7
              Re: Making an image load faster

              David,

              A few suggestions have been made to speed up the loading process...have you tried them??

              An aside----I wonder if there is something else going on as it sure seems that in version 8 when I have an jpeg image in a browse and a separate image field that corresponds, the image displays instantly. I am using an image reference field however. Even have a 2.57 MB bitmap that displays instantly.
              Last edited by MikeC; 07-12-2008, 11:00 PM.
              Mike
              __________________________________________
              It is only when we forget all our learning that we begin to know.
              It's not what you look at that matters, it's what you see.
              Henry David Thoreau
              __________________________________________



              Comment


              • #8
                Re: Making an image load faster

                Yes... tried the BLOB route, but sometimes I'll have 60 images to load... it's going to put a drain on the system... and I don't want to start write code to track what's been cached and what hasn't. I didn't think I should have to jump through hoops to display an image in decent time.

                I tried the image reference field too... image still takes time to load... and they're only 300k. Not wanting it to do anything magical... just need it responsive.

                David

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                • #9
                  Re: Making an image load faster

                  I use to use the Pegasus ImagXpress control under VB and Access - very good. When Access 2007 came out MS improved the image control substantially - very fast, exposed the properties so I used that.

                  I'd like to see the Image control under A5 improved. I've managed to install ImagXpress in A5 and get it to work quite easily - and it's fast. The image displays as soon as a browse record is selected.

                  I'd prefer not to use 3rd party controls - too messy sometimes, but the A5 Image control isn't there yet.

                  David

                  Comment


                  • #10
                    Re: Making an image load faster

                    did you mean 60 browse records with 1 image each? surely not 60 per browse record.

                    what version of ImagXpress did you use, and how do you use it in Alpha?
                    Cole Custom Programming - Terrell, Texas
                    972 524 8714
                    martin_w_cole@msn.com

                    ____________________
                    "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

                    Comment


                    • #11
                      Re: Making an image load faster

                      Yes, 1 image per browse row... move up and down the browse row and the image attached to that record displays.

                      The version I'm using is older... Version 3.0... I believe version 6 or 7 is available. From a browse event...

                      frmClaims_Images_Adj:activex1.activex.filename = Tblclaimimages->imageloc

                      I need to name things properly, but just wanted to test. Rotate, and lots of other functions available.

                      If I recall, it doesn't print very well. For printing under VB and Access I used Pegasus ImagN - going to try that tonight. If the A5 Image control is slow loading on screen, then printing several pages of 4 to 6 images each will take too long.

                      Again, I'd prefer to use an A5 control... but it's just not fast enough.


                      David

                      Comment


                      • #12
                        Re: Making an image load faster

                        FWIW, I'm working on this in the same way. When I click from row to row on the browse, the pics with a lighter background load in less tha a second. The ones with a dark background take about twice as long.

                        Also, with the browse on the form, when in edit mode, design work is slower than a 7 year itch. Whit the browse removed, the design work appears to be normal.

                        I experimented with another form and found there was a slight delat when moving objects around. (not as bad as the 7 yrar itch) I removed the browse and object movement is instantaneous.


                        kenn
                        TYVM :) kenn

                        Knowing what you can achieve will not become reality until you imagine and explore.

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                        • #13
                          Re: Making an image load faster

                          I found response time to be "jagged" as well. I wasn't sure if it was the bitmap control or the browse. While in design mode cursor movement is hesitant... not smooth... and objects take a long time (relatively) to work with.

                          Instead of a bitmap control, try adding an Image Reference
                          field to your table (I think that's the name - not at my desk). It seems to load faster and has a built-in function to open a dialog to get an image. It stores just the path and filename of the image in the table. Good for adding one image at a time, but to add many at once I'm using xbasic.

                          Also, the image reference field works well in a report. I couldn't get the Bitmap image or the Pegasus ImageX controls to work for me.

                          David

                          Comment


                          • #14
                            Re: Making an image load faster

                            Hello David,

                            Mine is set for the image reference. I suspect it has more to do with the browse than the image field.

                            kenn
                            TYVM :) kenn

                            Knowing what you can achieve will not become reality until you imagine and explore.

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