Automatically generate and serve images for your visitor's viewport size without changing your theme!
This plugin provides a middleware that adds srcset and sizes attributes to all locally served images in your html
response.
It turns this
<img width="500" src="/storage/app/media/image.jpg">into this
<img width="500" src="/storage/app/media/image.jpg" srcset="/storage/temp/public/be7/4d6/0cc/image__400.jpg 400w, /storage/temp/public/be7/4d6/0cc/image__768.jpg 768w, /storage/temp/public/be7/4d6/0cc/image__1024.jpg 1024w" sizes="(max-width: 500px) 100vw, 500px">It automatically creates resized copies of the image and serves the most fitting one to your visitor.
All image copies are saved in your public temp path. Remote file systems are currently untested.
The images are generated on the first page load. Depending on the source image size this may take a few seconds. Subsequent page loads will be faster since the images are only resized once.
Three image sizes are created by default: 400, 768 and 1024 pixels.
You can change these values by changing the settings in the backend.
If you want to use an alternative src attribute you can change this via the backend settings page.
This is useful if you are using a plugin like jQuery.lazyLoad where the image
is initially linked via a data-original attribute.
If your plugin requires an alternative srcset attribute (like verlok/LazyLoad) this can also be specified via the backend settings.
If you want to add a class to every processed image you can configure this via the backend settings.
This is useful if you want to add Bootstrap's img-responsive class to all images on your website.
You can use the php artisan responsive-images:generate command to pre-generate responsive images. The command uses
October's pages.menuitem.* events to build a list of all available URLs and pre-generates all images used on these
pages.
I have tested this plugin on a page with 20 hd wallpapers from pixabay.
| Viewport width | Transferred file size |
|---|---|
| 1920 px | 21.8 MB |
| 1024 px | 3.1 MB |
| 768 px | 2.0 MB |
| 400 px | 0.8 MB |
If for any reason you want an img tag to be completely ignored by this plugin, simply
add the data-responsive="ignore" attribute to your tag:
<img src="dont-process-this.jpg" data-responsive="ignore" alt="">This plugin provides an option to automatically convert all images to the WebP image format if the visiting Browser signals support for it.
Be aware that each WebP image is created on-demand with the first page view that requests it.
This might lead to slow page load times for your first visitors. To prevent this, warm up
the image cache by visiting every page at least once (by using a linkchecker) or
use the php artisan responsive-images:generate -v console command.
To make use of this feature, enable it via October's backend settings. If you are using
Apache with .htaccess support, the plugin will serve WebP images to supported browsers
automatically.
If you do not use Apache, you have to configure your server to do the following:
- Check if
image/webpis present in theAcceptshttp header - Check if the requested image ends in
jp(e)gorpng - Check if the requested image + a
.webpexists - If it does, serve it
- If it does not, redirect the request to
plugins/offline/responsiveimages/webp.php?path=${REQUEST_URI}
The webp.php helper script will generate any missing WebP images so they can be served directly
on the next visit.
If you are using Apache with mod_rewrite enabled, you do not have to do anything manually.
The plugin will patch your .htaccess file if WebP support gets enabled.
If you are using Nginx to serve your October website, you have to modify your server configuration manually.
The following example should give you a good starting point.
user www-data;
http {
sendfile on;
tcp_nopush on;
tcp_nodelay on;
include /etc/nginx/mime.types;
default_type application/octet-stream;
gzip on;
gzip_disable "msie6";
map $http_accept $webp_suffix {
default "";
"~*webp" ".webp";
}
# ...
server {
charset utf-8;
listen 80;
server_name localhost;
root /var/www/html;
index index.php;
location ~ \.(jpe?g|png)$ {
add_header Vary Accept;
try_files $uri$webp_suffix $uri/ @router;
}
location @router {
rewrite ^(.*)$ /plugins/offline/responsiveimages/webp.php?path=$uri;
}
# ...
}
}Your mime.types file should additionally list the webp mime type:
image/webp webp;
We did not invest in the proper WebP detection configuration for other server software.
Based on the .htaccess example above and the webp-detect
repo you should be able to figure out what config is needed.
If you have a working example please add it via a PR to this README!
If your application directory is located in a special location, you can set the
RESPONSIVE_IMAGES_BASE_DIR environment variable to change the source path.
<IfModule mod_setenvif.c>
SetEnv RESPONSIVE_IMAGES_BASE_DIR /path/to/your/dir
</IfModule>
This feature has two components to it:
In the backend, the file upload widget is extended with a simple focus point selector.
To enable this extension simply set focuspoint: true to any fileupload widget in your
plugin's fields.yaml. This feature is off by default.
Once it is enabled you can click on an uploaded image to select the focus point.
fields:
images:
label: Images
mode: image
useCaption: true
thumbOptions:
mode: crop
extension: auto
span: full
type: fileupload
# Enable the focus point selector
focuspoint: true
You can use the new focus method on any File model to get the source to a focus point image.
The focus method has the exact same API as the thumb method, you can specify a height, width and a mode.
<img src="{{ image.focus(200, 300, 'auto') }}" alt="">This call will result in the following HTML:
<img src="/storage/temp/public/a9f/2bd/159/offline-focus_30_400_500_50_50_0_0_auto__400.jpg"
alt=""
class="focuspoint-image"
style="width: 100%; height: 100%; object-fit: cover; object-position: 30% 80%;">You can disable the injection of the inline styles via the plugin's backend settings.
If you want to use any of the existing focus point JS libraries you can also define a custom container
that will be place around the image. The focus coordinates can be injected as custom data-* attributes.
All of these settings are available on the plugin's backend settings page.
<div class="focuspoint-container" data-focus-x="50" data-focus-y="30">
<img src="/storage/temp/public/a9f/2bd/159/offline-focus_30_400_500_50_50_0_0_auto__400.jpg"
alt=""
class="focuspoint-image"
data-focus-x="50"
data-focus-y="30"
>
</div>Be aware that object-fit is not supported in IE without
using a polyfill.
This plugin registers a simple svg helper function that enables you to inline SVG images from your project.
<!-- search in theme directory -->
<div class="inline-svg-wrapper">
{{ svg('assets/icon.svg') }}
</div>
<!-- start with a / to search relative to the project's root -->
<div class="inline-svg-wrapper">
{{ svg('/plugins/vendor/plugin/assets/icon.svg') }}
</div>Aside from inlining the SVG itself the helper function will also pass any variables along to the SVG and parse it using October's Twig parser. This means you can easily create dynamic SVGs.
<!-- icon.svg -->
<svg fill="{{ fill }}" width="{{ width | default(800) }}"> ...<!-- You can pass variables along as a second parameter -->
<img src="{{ svg('/plugins/xy/assets/icon.svg', {fill: '#f00', width: '200'}) }}">It is very likely that there will be bugs with some specific html markup. If you encounter such a bug, please report it.
- Exclude/Include-Filters
- Maybe a component to enable the middleware only on some pages