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WOOF_Image :: picture_2x( Arguments $args )
The HTML based markup for picturefill.
A preset on the WOOF_Image::picture method to output markup for use with the picturefill responsive images library by Scott Jehl. This preset sets the 2x argument to true by default, which assumes that this image is the high resolution image which will be scaled down for a 1x image. This allows you to quickly output a high resolution image and have the 1x be based on this image scaled down. Note that if this image needs to be a specific width at both resolutions, you need to specify this in the “width” or “w” argument.
An arguments array or string which accepts the following possible parameters:
Note: See below this list for the meaning of the (DIM) and (FILE) placeholder values.
- min-WIDTH: (DIM) or (FILE) – outputs a min-width breakpoint where WIDTH is the desired min-width (without px prefix) e.g. min-400
- max-WIDTH: (DIM) or (FILE) – outputs a max-width breakpoint where WIDTH is the desired max-width e.g. min-400
- min-WIDTH1-max-WIDTH2: (DIM) or (FILE) – outputs a min-width and max-width breakpoint where WIDTH1 is the desired min-width and WIDTH2 is the desired max-width. e.g. min-480-max-768
- 2x: (DIM) or (FILE) or “true” – outputs a high resolution specification for the image – with no width breakpoints. If this argument is “true”, the method will assume that THIS image is the 2x size, and will output the standard size image as a 50%-resized version of this.
- 2x-min-WIDTH: (DIM) or (FILE) – outputs a min-width high-resolution breakpoint where WIDTH is the desired min-width (without px prefix) e.g. 2x-min-400
- 2x-max-WIDTH: (DIM) or (FILE) – outputs a max-width high-resolution breakpoint where WIDTH is the desired max-width (without px prefix) e.g. 2x-min-400
- 2x-min-WIDTH1-max-WIDTH2: (DIM) or (FILE) – outputs a min-width and max-width high resolution breakpoint where WIDTH1 is the desired min-width and WIDTH2 is the desired max-width. e.g. 2x-min-480-max-768.
- width: the width of the image, to add as a style attribute to the outer div. By default, picturefill will not add any widths or heights to the images, to allow them to be uses in responsive layouts. This can be an integer width, or set to “1x” to use the width of this image.
- w:An alias for “width”
The (DIM) placeholder above can be any of:
- WIDTHxHEIGHT: to resize and crop to a desired WIDTH and HEIGHT.
- WIDTHx?: to resize to a desired WIDTH and scale the height proportionally
- ?xHEIGHT: to resize to a desired HEIGHT and scale the width proportionally
The (FILE) placeholder above can be any of:
- An absolute URL – a URL including domain and protocol. e.g. http://domain.com/wp-content/themes/my-theme/image.jpg
- A root relative URL – A URL with leading slash, taken from the root of the current site e.g. /wp-content/themes/my-theme/image.jpg
- A file or path relative to THIS image – e.g. file.jpg will be regarded as a URL in the same directory as THIS image object, 2x/image.jpg will be taken as a folder in the same folder as this image.
- A suffix – if none of the above match, the string will be regarded as a suffix to add to the current image file name (just before the extension). For example, if you have a high resolution file in the same folder as this image, with the @2x suffix ( you could set “2x” => “@2x” )
- A WOOF_Image object – if you pass the args as an array, you can also pass a WOOF_Image object to use for the URL.
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