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  1. Moodle
  2. MDL-37308

PNG Image conversion does not support transparency.

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    • MOODLE_24_STABLE, MOODLE_28_STABLE, MOODLE_29_STABLE, MOODLE_30_STABLE
    • MOODLE_29_STABLE, MOODLE_30_STABLE
    • MDL-37308-master
    • Hide

      Manual testing

      1. Create a database activity
      2. Add a picture field type. Specify the width and height for the list view.
      3. Save the template.
      4. Add some entries. Use the two png files attached to this issue. Also add a gif file with a transparency and a jpeg file (no transparency).
      5. Go to the list view.
        • Check that the background of each of the images is not black where it should be transparent.
      6. Click on the Fields tab and edit the picture field.
      7. Remove the values for the width and height settings for the list view.
      8. Go back to the list view.
        • Check that the background of each of the images is not black where it should be transparent.

      Unit test

      1. Run the unit test - lib/filestorage/tests/file_storage_test.php and ensure that there are no errors.
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      Manual testing Create a database activity Add a picture field type. Specify the width and height for the list view. Save the template. Add some entries. Use the two png files attached to this issue. Also add a gif file with a transparency and a jpeg file (no transparency). Go to the list view. Check that the background of each of the images is not black where it should be transparent. Click on the Fields tab and edit the picture field. Remove the values for the width and height settings for the list view. Go back to the list view. Check that the background of each of the images is not black where it should be transparent. Unit test Run the unit test - lib/filestorage/tests/file_storage_test.php and ensure that there are no errors.
    • Team '; drop tables Sprint 7, 3.1 Stable Sprint 1
    • Small

      The function convert_image() in /lib/filestorage/file_storage.php does not support PNG Image transparency and yet the function generate_image_thumbnail() in /lib/gdlib.php does. Could the two be 'refactored' to be consistent such that the former would use the latter if the GD2 library was installed?

      To put in context, this relates to some Grid course format work - https://moodle.org/mod/forum/discuss.php?d=218272#p952418

      I can work around this I think through employment of generate_image_thumbnail() and then save with the functions in /lib/filestorage/file_storage.php.

        1. greg.png
          greg.png
          34 kB
        2. greg-02.png
          greg-02.png
          0.3 kB

            jpataleta Jun Pataleta
            gb2048 Gareth J Barnard
            Adrian Greeve Adrian Greeve
            Dan Poltawski Dan Poltawski
            Ryan Wyllie Ryan Wyllie
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            3 Vote for this issue
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              Created:
              Updated:
              Resolved:

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