PHP | imagetruecolortopalette() Function
The imagetruecolortopalette() function is an inbuilt function in PHP which is used to convert a true color image to a palette image.
Syntax:
bool imagetruecolortopalette( $image, $dither, $ncolors )
Parameters: This function accepts three parameters as mentioned above and described below:
- $image: It is returned by one of the image creation functions, such as imagecreatetruecolor(). It is used to create size of image.
- $dither: It is the boolean value which indicate the image is dither. If it is True then dithering will be used which will result in a more speckled image but with better color approximation.
- $ncolors: This parameter contains the set of maximum number of colors that should be retained in the palette.
Return Value: This function returns True on success or False on failure.
Below programs illustrates the imagetruecolortopalette() function in PHP:
Program 1:
<?php
$im = imagecreatetruecolor(400, 300);
$background_color = imagecolorallocate( $im , 0, 153, 0);
imagefill( $im , 0, 0, $background_color );
imagetruecolortopalette( $im , true, 255);
header( 'Content-type: image/png' );
imagepng( $im );
?>
|
Output:
Program 2:
<?php
$im = imagecreatefrompng(
imagetruecolortopalette( $im , false, 255);
header( 'Content-type: image/png' );
imagepng( $im );
?>
|
Output:
Reference: http://php.net/manual/en/function.imagetruecolortopalette.php
Last Updated :
26 Aug, 2019
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