For those who are interested in creating pure CMYK images with Imagick, you can use the importImagePixels function as a workaround. A little demo :

$oImage = new Imagick();

$iWidth = 100;
$iHeight = 100;

$aCMYK = array();
for ($iX = 0; $iX < $iWidth; $iX++){
	for ($iY = 0; $iY < $iHeight; $iY++){
		$aCMYK[] = $iX / $iWidth * 255;
		$aCMYK[] = $iY / $iHeight * 255;
		$aCMYK[] = 0;
		$aCMYK[] = 0;
	}
}
$oImage->newImage($iWidth, $iHeight, 'transparent');
$oImage->importImagePixels(0, 0, $iWidth, $iHeight, "CMYK", Imagick::PIXEL_CHAR, $aCMYK);

$oImage->setImageFormat('jpg');
header("Content-Type: image/jpg");
echo $oImage;

Hi,

If you want a CMYK image you need to set the colorspace of the image to CMYK e.g.:

$im = new Imagick();
$im->newImage(500, 500, new ImagickPixel('rgba(255,255,255)'), 'png');
$im->setImageColorspace(Imagick::COLORSPACE_CMYK);




If that doesn't do what you want, please can you provide a complete example that produces an image, and describe how it doesn't meet your expectations?

$oImage = new Imagick();
$oImage->newImage(50, 50, 'transparent', 'jpg');
$oImage->setImageColorspace(Imagick::COLORSPACE_CMYK);
for ($i = 0; $i < 50; $i++){
	for ($j = 0; $j < 25; $j++){
		$oImage->importImagePixels($i, $j, 1, 1, "CMYK", Imagick::PIXEL_CHAR, array(255, 0, 0, 127));
	}
	for ($j = 25; $j < 50; $j++){
		$oDraw = new ImagickDraw();
		$oColor = new ImagickPixel("cmyk(100,0,0,50)");
		$oDraw->setFillColor($oColor);
		$oDraw->point($i, $j);
		$oImage->drawImage($oDraw);
	}
}

header("Content-Type: image/jpg");
echo $oImage;



Normally, the image should be completely painted in "dark cyan", with top and bottom parts in the same color.

Instead, the top part (importImagePixels) is correctly painted in dark cyan, but the bottom part (setFillColor) is painted in dark red.

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