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ImageSetAntialiasing
Last update:
May 18, 2026
Description
Switches antialiasing on or off in rendered graphics.
Returns
Nothing.
Category
Function syntax
ImageSetAntialiasing(image [, antialias])See also
History
ColdFusion (2018 release): Introduced named parameters.
ColdFusion (2016 release) Update 1: Accepts true/false for antialias.
ColdFusion 8: Added this function.
Parameters
Parameter | Description |
image | Required. The ColdFusion image on which this operation is performed. |
antialias | Optional. Antialiasing switch:
|
Usage
The ImageSetAntialiasing function is used to turn antialiasing on and off when drawing shapes and text in an image. Antialiasing is a technique used to soften jagged edges. Turn on antialiasing when using other image functions, such as ImageDrawRoundRect and ImageRotate, to improve the quality of the rendered image. Notice that antialiasing decreases performance.
Example
Example 1
<!--- Create a ColdFusion image from an existing JPEG file. --->
<cfset myImage=ImageNew("../cfdocs/images/artgallery/elecia02.jpg")>
<!--- Turn off antialiasing.--->
<cfset ImageSetAntialiasing(myImage,"off")>
<!--- Display the modified image in a browser. --->
<cfimage source="#myImage#" action="writeToBrowser">Example 2
<!--- Create a 200x200-pixel image. --->
<cfset myImage=ImageNew("",200,200)>
<!--- Set the drawing color for the image to blue. --->
<cfset ImageSetDrawingColor(myImage,"blue")>
<!--- Turn on antialiasing. --->
<cfset ImageSetAntialiasing(myImage,true)>
<!--- Draw a blue filled square with round corners of arcWidth=10 and arcHeight=2. --->
<cfset ImageDrawRoundRect(myImage,5,5,190,190,"yes",10,2)>
<!--- Rotate the image 30 degrees. --->
<cfset ImageRotate(myImage,30)>
<!--- Display the image in a browser. --->
<cfimage source="#myImage#" action="writeToBrowser">
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