Pre-resize images

Osclass installations on modest hostings tend to provoke problems with PHP memory limit when the users try to upload images with big resolution (like those produced by modern phone devices). In most cases final images on your site won't have more than 640x480 pixels, so normally you have no real need to handle (and maybe permanently store in your server) such big images. This plugin will resize them to a much more manageable resolution on the client side, before they are sent to your server.



This way, to the user uploads are much faster, and to you as admin, it will save a lot of bandwidth and processing power.


As an added bonus, the plugin allows rearranging of images (the order in which they'll be shown in ad page), even when editing the ad (since v. 2.3.0).



By default the plugin sets the maximum resolution for pre-resizing to twice the max value set for "Normal size" in Admin Dashboard / Settings / Media (640x480 by default, so for pre-resizing it would be 1280). Until version 2.0.0 at this resolution some artifacts might be noticed in specififc circumstances. Now thanks to the introduction of Pica library for better resizing, 1280 is more than enough unless you have special needs and wanted to show really big images to your users.



This plugin should be compatible with any theme that includes Ajax Uploader for images ("Click or drop for upload images") using Osclass standard function ItemForm::ajax_photos().



Note: For this plugin to work, user browser must be fully HTML5 compliant. Old browsers such as IE9 and older will use the normal Ajax upload mechanism with no pre-resizing.



You'll need to slightly modify your theme, install the plugin and click on Configure (or Plugins / Pre-resize Images / Settings & Help) to change maximum resolution and see instructions.



Note: Currently this plugin replaces Fine Uploader module v. 3.8.0 bundled with Osclass with the latest v. 5.16.2, under MIT license.



Changelog:


Version: 2.3.1 (2018.09.22)

+ Now to reorder images the user must Click & Drag on the thumbnail itself. Behavior changed to fix a bug on mobile view when trying to delete the image.

+ Fixed a bug on Edit Ad when there is no limit for uploaded images.

+ Fixed some minor bugs.



Version: 2.3.0 (2018.07.18)

+ Full reordering of images on Edit ad (no distinction between already existing images and newly uploaded ones).

+ Upgrade to Fine Uploader 5.16.2

+ Fixed some minor bugs.


Version: 2.2.1 (2017.09.18)

+ Solved image orientation issues when using ImageMagick on browsers not supporting pre-resizing.

+ Solved occasional image corruption in Chrome on Android.

+ Fixed flickering on Drag & Drop in Firefox.



Version: 2.2.0 (2017.09.04)

+ Upgrade to Fine Uploader 5.15.0

+ Fixed Image Orientation bug when multiple images are being selected.

+ Optimization of scripts loading.

+ Several bugs fixed.



Version: 2.1.0 (2017.01.21)

+ Fixed Drag & Drop images on Microsoft IE 11 / Edge (Thanks to developerchris :)

+ Restored "Make Primary Image" buttons (only on Publish Ad).

+ Fixed bug on Edit Ad when Decent Mobile Theme plugin is used.



Version: 2.0.1 (2016.12.23)

+ Fixed bug provoking output error on installing and other circumnstances



Version: 2.0.0 (2016.12.14)

+ Upgrade to Fine Uploader 5.11.10 (MIT license).

+ Much better resizing of images by using Pica library (MIT license).

+ Now images to be uploaded are fully sortable by dragging thumbnails.

+ Support for Decent Mobile Theme plugin.

+ Added languages folder for translation of plugin specific strings.

+ Fixed a bug affecting proper rotation of images including EXIF orientation.

- Discarded embedding of original EXIF information of the images.



Version: 1.1.2 (2016.06.13)

+ Embed original EXIF information of the images to avoid occasional validation problems on server side.



Version: 1.1.1 (2016.03.15)

+ Improved Make Primary Image layout.

+ Full translation of Ajax Uploader elements.

+ Fixed minor bugs



Version: 1.1.0 (2016.02.17)

+ Fine Uploader 5.0.9 (licensed under GNU GPL v3). Thanks a lot to dev101 for his support. :)

+ Added feature Change Primary Image (publishing page only).

+ Compatibility with Minifyer plugin.

+ Minor cosmetic change.

+ jQuery optimization



Version: 1.0.1 (2016.02.12)

+ Fixed several issues when user tries to upload more images than the allowed number.

+ Added support for some themes not using the standard Ajax Uploader mechanism.

+ Added a Plugins submenu for those having problems with Configure link.

+ Changed name of jquery.fine-uploader.min.js script to jquery.fineuploader.min.js



Version: 1.0 (2016.01.25)

+ Initial release