PHP |想象一下 setImageDepth()函数
Imagick::setImageDepth()函数是PHP中的一个内置函数,用于设置特定图像的深度。
句法:
bool Imagick::setImageDepth( $depth )
参数:此函数接受单个参数$depth ,它是一个整数值,用于设置图像的深度。
返回值:此函数在成功时返回 true。
下面的程序说明了PHP中的Imagick::setImageDepth()函数:
原图:
方案一:
php
getImageDepth();
// Display the depth of image
echo "Previous Depth" . $res;
$image->setImageDepth(20);
$res = $image->getImageDepth();
echo "After Set Depth" . $res;
?>
php
setFillColor(new ImagickPixel('green'));
// Set the text font size
$draw->setFontSize(50);
$matrix = $im->queryFontMetrics($draw, $string);
$draw->annotation(0, 40, $string);
$im->newImage($matrix['textWidth'], $matrix['textHeight'],
new ImagickPixel('white'));
// Draw the image
$im->drawImage($draw);
$im->setImageFormat('jpeg');
$dpth = $im->getImageDepth();
// Display the depth of image
print("Previous Depth = " . $dpth);
$im->setImageDepth(20);
$dpthnew = $im->getImageDepth();
// Display the depth of image
print("Depth After Set = " . $dpthnew);
?>
输出:
Previous Depth 8
After Set Depth 20
原图:
方案二:
PHP
setFillColor(new ImagickPixel('green'));
// Set the text font size
$draw->setFontSize(50);
$matrix = $im->queryFontMetrics($draw, $string);
$draw->annotation(0, 40, $string);
$im->newImage($matrix['textWidth'], $matrix['textHeight'],
new ImagickPixel('white'));
// Draw the image
$im->drawImage($draw);
$im->setImageFormat('jpeg');
$dpth = $im->getImageDepth();
// Display the depth of image
print("Previous Depth = " . $dpth);
$im->setImageDepth(20);
$dpthnew = $im->getImageDepth();
// Display the depth of image
print("Depth After Set = " . $dpthnew);
?>
输出:
Previous Depth = 8
Depth After Set = 20
参考: http: PHP。 PHP