I use standard code for inserting images from s3 bucket to spreadsheet
$stamp = MemoryDrawing::fromString($stamp_file);
$stamp->setName('Stamp');
$stamp->setHeight(120);
$stamp->setCoordinates('A2');
$stamp->setWorksheet($sheet);
All the examples I found used jpg files, but I need a png. Problem is artefacts in transparency, like image below.
MemoryDrawing's default mime and renderer is PNG, and even if I explicitly specify it, then nothing will change.
How can I fix it?
Thank you in advance
