PHP | Imagick setImageUnits() Function
The Imagick::setImageUnits() function is an inbuilt function in PHP which is used to set the units of resolution of a particular image.
Syntax:
bool Imagick::setImageUnits( $units )
Parameters: This function accepts single parameter $units which is used to specify the units to be set for image.
Resolution constants: The Imagick::setImageUnits() function set the Image Units, as described below:
- imagick::RESOLUTION_UNDEFINED(integer), unit = 0
- imagick::RESOLUTION_PIXELSPERINCH(integer), unit = 1
- imagick::RESOLUTION_PIXELSPERCENTIMETER(integer), unit = 2
Return Value: This function returns True on success.
Original Image:
Below programs illustrate the Imagick::setImageUnits() function in PHP:
Program 1:
php
<?php// PHP program to illustrate // seImageUnits function$image = new Imagick(// Use getImageUnits function$units = $image->getImageUnits();echo "units Before SetUnit = ";print_r($units);// set image unit = 1$image->setImageUnits(1);// Display the output$units = $image->getImageUnits();echo "</br>units After Set = ";print_r($units);?> |
Output:
units Before SetUnit = 2 units After Set = 1
Program 2:
php
<?php$i = new Imagick($r = $i->getImageResolution();$u = $i->getImageUnits();echo "print previous resolution = ";print_r($r);// print unitsecho "</br>Check units = ";print_r($u);// for units are based on below resolution//0=undefined, 1=pixelsperInch, 2=PixelsPerCentimeter// checking if units = 2// then set unit = 1if ($u == Imagick::RESOLUTION_PIXELSPERCENTIMETER) { $r[x] = (int)round($r[x] * 2); $r[y] = (int)round($r[y] * 2); $i->setImageUnits(Imagick::RESOLUTION_PIXELSPERINCH); $i->setImageResolution($r[x], $r[y]); //note that the number type is double again $r = $i->getImageResolution();}// print resolution afterecho "</br>resolution after ";print_r($r);$u = $i->getImageUnits();echo "</br>units After Set = ";print_r($u);?> |
Output:
print previous resolution = Array ( [x] => 37.8 [y] => 37.8 ) Check units = 2 resolution after Array ( [x] => 76 [y] => 76 ) units After Set = 1
Reference: http://php.net/manual/en/imagick.setimageunits.php
