HHVM: Cannot load PDF files into EscposImage()

[mike42]

escpos-php uses file paths in the form foo.php[0] to seek pages from PDF files, and is affected by a compatibility issue between HHVM/Imagick. See facebook/hhvm#4771

The result is that under HHVM, multi-page PDF files cannot be loaded with this driver (EscposIMage::loadPDF will throw Exception: exception 'ImagickException' with message 'Invalid filename provided'). Four tests give errors or fails when loading PDF's in this way.

Affected users can work around the issue limit themselves to singe-page PDF's, or rasterizing their images on the command-line and printing from a series of PNG files.

• Rasterization can be done with convert.
• Single-page PDF's can be loaded via new EscposImage("foo.pdf"). A multi-page PDF can be split up into several single-page PDF's with pdftk or qpdf.

[mike42]

Attempted removing page-range feature, seems to be other issues with HHVM's Imagick, as the text is now being rasterized over a black background (black page except for images), while other environments render it on white.

See bf0175d - The output of print-from-pdf.php is attached in a zip file for later reference out.zip,

cat out.bin > /dev/usb/lp0