Imagick::tintImage

(PECL imagick 2.0.0)

Imagick::tintImage — Applies a color vector to each pixel in the image

说明

bool Imagick::tintImage ( mixed $tint , mixed $opacity )

Applies a color vector to each pixel in the image. The length of the vector is 0 for black and white and at its maximum for the midtones. The vector weighing function is f(x)=(1-(4.0*((x-0.5)*(x-0.5)))).

参数

tint
opacity

返回值

成功时返回 TRUE 。

错误／异常

错误时抛出 ImagickException。

更新日志

版本	说明
2.1.0	Now allows a string representing the color as the first parameter and a float representing the opacity value as the second parameter. Previous versions allow only an ImagickPixel objects.

范例

Example #1 Imagick::tintImage()

  <?php
 function  tintImage ( $r ,  $g ,  $b ,  $a ) {
     $a  =  $a  /  100 ;

     $imagick  = new \ Imagick ();
     $imagick -> newPseudoImage ( 400 ,  400 ,  'gradient:black-white' );

     $tint  = new \ ImagickPixel ( "rgb( $r ,  $g ,  $b )" );
     $opacity  = new \ ImagickPixel ( "rgb(128, 128, 128,  $a )" );
     $imagick -> tintImage ( $tint ,  $opacity );
     $imagick -> setImageFormat ( 'png' );
     header ( "Content-Type: image/png" );
    echo  $imagick -> getImageBlob ();
}

 ?>