Imagick::getImageBackgroundColor
It seems that this method can return a zero-length string if faced with large-ish data. No exceptions are thrown.
<?php
$image = new Imagick();
if (!$image->newImage(1000,1,'white')) throw new Exception();
if (!$image->scaleImage(0,200)) throw new Exception();
print "Image size: {$image->getImageWidth()},{$image->getImageHeight()}\n";
if (!$image->setImageFormat("jpeg")) throw new Exception();
$a = $image->getImageBlob();
print "Rendered to ".strlen($a)." bytes\n";
?>
Restrict your output image size, or ensure that the blob you get back isn't empty. (Note that IM seems to be doing the work, it delays for some time. But there's no indication of any error anywhere.)
Imagick::getImageBlob
(PECL imagick 2.0.0)
Imagick::getImageBlob — Returns the image sequence as a blob
Description
string Imagick::getImageBlob
( void
)
Implements direct to memory image formats. It returns the image sequence as a string. The format of the image determines the format of the returned blob (GIF, JPEG, PNG, etc.). To return a different image format, use Imagick::setImageFormat().
Return Values
Returns a string containing the image.
Errors/Exceptions
Throws ImagickException on error.
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User Contributed Notes
Imagick::getImageBlob
Trevor
01-Dec-2011 03:41