Makes the colors of the palette version of an image more closely match the true color version
Syntax
imagecolormatch(
GdImage $image1,
GdImage $image2
): boolParameters
image1A truecolor image object.
image2A palette image object pointing to an image that has the same size as image1.
Return
Returns true on success or false on failure.
Examples
1 · return
<? $width = 100; $height = 100; $image1 = imagecreatetruecolor($width, $height); $image2 = imagecreate($width, $height); $red = 255; $green = 255; $blue = 255; imagecolorallocate($image2, $red, $green, $blue); $return = imagecolormatch($image1, $image2); var_export($return); ?>
true
2 · base64
<?
$width = 100;
$height = 100;
$image1 = imagecreatetruecolor($width, $height);
ob_start();
imagepng($image1);
$output1 = ob_get_clean();
$image2 = imagecreate($width, $height);
$red = 255;
$green = 255;
$blue = 255;
imagecolorallocate($image2, $red, $green, $blue);
ob_start();
imagepng($image2);
$output2 = ob_get_clean();
imagecolormatch($image1, $image2);
ob_start();
imagepng($image2);
$output3 = ob_get_clean();
echo '<!doctype html>
<html>
<body>
<img src="data:image/png;base64,' . base64_encode($output1) . '"><br>
<img src="data:image/png;base64,' . base64_encode($output2) . '"><br>
<img src="data:image/png;base64,' . base64_encode($output3) . '">
</body>
</html>';
?><!doctype html>
<html>
<body>
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAANElEQVR4nO3BAQ0AAADCoPdPbQ43oAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAfgx1lAABqFDyOQAAAABJRU5ErkJggg=="><br>
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkAQMAAABKLAcXAAAAA1BMVEX///+nxBvIAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAFElEQVQ4jWNgGAWjYBSMglFATwAABXgAAfmlXscAAAAASUVORK5CYII="><br>
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkAQMAAABKLAcXAAAAA1BMVEUAAACnej3aAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAFElEQVQ4jWNgGAWjYBSMglFATwAABXgAAfmlXscAAAAASUVORK5CYII=">
</body>
</html>
