The imagepalettetotruecolor() function is an inbuilt function in PHP which is used to convert an palette based image to true color.
Syntax:
bool imagepalettetotruecolor( resource $src )
Parameters: This function accepts a single parameter $src which holds the image to work on.
Return Value: This function returns TRUE if the conversion was complete, or if the source image already is a true color image, otherwise FALSE is returned.
Below given programs illustrate the imagepalettetotruecolor() function in PHP:
Program 1:
<?php // Create an image $image = imagecreate(700, 200);
echo '<b>Before conversion:</b> <br>' ;
// Check the image type check( $image );
echo '<b><br>After conversion:</b> <br>' ;
// Convert image to true color imagepalettetotruecolor( $image );
// Check the image type check( $image );
// Function for checking the image type function check( $image ) {
echo 'Type of image is ' . (imageistruecolor( $image )
? 'true color' : 'palette' );
} ?> |
Output:
Before conversion: Type of image is palette After conversion: Type of image is true color
Program 2:
<?php // Create an image of palette type $image = imagecreate(700, 200);
// Convert image to true color imagepalettetotruecolor( $image );
// Prepare red color $red = imagecolorallocate( $image , 0xFF, 0x00, 0x00);
// Add text to the image using a local font file imagefttext( $image , 100, 0, 0, 130, $red ,
'./RugeBoogie-Regular.ttf' , 'GeeksforGeeks' );
// Output to browser header( 'Content-type: image/png' );
imagepng( $image );
imagedestroy( $image );
?> |
Output:
Reference: https://www.php.net/manual/en/function.imagepalettetotruecolor.php