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--TEST--
Imagick::setImageAlpha
--SKIPIF--
<?php
$imageMagickRequiredVersion=0x700;
require_once(dirname(__FILE__) . '/skipif.inc');
?>
--FILE--
<?php
require_once __DIR__ . "/../util/functions.php";
$imagick = new Imagick();
$imagick->newPseudoImage(256, 256, 'xc:purple');
$imagick->setImageAlpha(0.5);
$imagick->setImageFormat('png');
$imagick->writeImage(__DIR__ . "/setAlphaTest.png");
$pixelTypes = array(
Imagick::PIXEL_CHAR => array(128, 0, 128, 128),
Imagick::PIXEL_FLOAT => array(0.50196081399918, 0, 0.50196081399918, 0.5),
Imagick::PIXEL_DOUBLE => array(0.50196078431373, 0, 0.50196078431373, 0.5),
Imagick::PIXEL_SHORT => array(32896, 0, 32896, 32768),
);
function getColorError($type, $expected, $actual) {
if ($type == Imagick::PIXEL_CHAR ||
$type == Imagick::PIXEL_SHORT) {
$string = "Expected: " . $actual . "\n";
$string .= "Actual : " . $actual . "\n";
return $string;
}
if ($type == Imagick::PIXEL_FLOAT) {
return float_compare_32($expected, $actual);
}
if ($type == Imagick::PIXEL_DOUBLE) {
return float_compare($expected, $actual);
}
echo "Unknown type: $type \n";
exit(-1);
}
foreach ($pixelTypes as $pixelType => $expectedValues) {
$pixels = $imagick->exportImagePixels(0, 0, 1, 1, "RGBA", $pixelType);
$channelNames = ['R', 'G', 'B', 'A'];
// Loop over the colours
for ($channel = 0; $channel < 4; $channel++) {
$actual = $pixels[$channel];
$expected = $expectedValues[$channel];
if (abs($actual - $expected) > get_epsilon_for_off_by_half_errors()) {
$channelName = $channelNames[$channel];
echo "Pixel values appear incorrect for pixelType $pixelType channel:$channelName\n";
echo getColorError($pixelType, $expected, $actual);
break;
}
}
}
echo "Ok";
?>
--CLEAN--
<?php
$f = __DIR__ . '/setAlphaTest.png';
if (file_exists($f)) unlink($f);
?>
--EXPECTF--
Ok