(mPDF >= 1.0)
img_dpi – Specify size conversion for images using pixels
Specify how to convert image sizes specified in "px" units (pixels). As a print medium, PDF documents do not have any inherent size for pixels. Width and height values of images set in pixels need to be converted to a real length. The dots-per-inch (dpi) affects the conversion from pixels for images; other objects using pixels as a length, are set by a separate variable dpi
Note: It is recommended that the values for dpi and img_dpi are the same.
Note: This variable can be changed in the configuration file config.php
INTEGER : set conversion for pixel - dots per inch
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