ImagickDraw::affine()

(PECL imagick 2.0.0)

Adjusts the current affine transformation matrix

说明

ImagickDraw::affine(array $affine): bool

Warning

本函数还未编写文档，仅有参数列表。

Adjusts the current affine transformation matrix with the specified affine transformation matrix.

参数

$affine

Affine matrix parameters

返回值

没有返回值。

范例

Example #1 ImagickDraw::affine()

<?php
function affine($strokeColor, $fillColor, $backgroundColor) {
    $draw = new \ImagickDraw();
    $draw->setStrokeWidth(1);
    $draw->setStrokeOpacity(1);
    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);
    $draw->setStrokeWidth(2);
    $PI = 3.141592653589794;
    $angle = 60 * $PI / 360;
    //Scale the drawing co-ordinates.
    $affineScale = array("sx" => 1.75, "sy" => 1.75, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);
    //Shear the drawing co-ordinates.
    $affineShear = array("sx" => 1, "sy" => 1, "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0);
    //Rotate the drawing co-ordinates. The shear affine matrix
    //produces incorrectly scaled drawings.
    $affineRotate = array("sx" => cos($angle), "sy" => cos($angle), "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0,);
    //Translate (offset) the drawing
    $affineTranslate = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 30, "ty" => 30);
    //The identiy affine matrix
    $affineIdentity = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);
    $examples = [$affineScale, $affineShear, $affineRotate, $affineTranslate, $affineIdentity,];
    $count = 0;
    foreach ($examples as $example) {
        $draw->push();
        $draw->translate(($count % 2) * 250, intval($count / 2) * 250);
        $draw->translate(100, 100);
        $draw->affine($example);
        $draw->rectangle(-50, -50, 50, 50);
        $draw->pop();
        $count++;
    }
    //Create an image object which the draw commands can be rendered into
    $image = new \Imagick();
    $image->newImage(500, 750, $backgroundColor);
    $image->setImageFormat("png");
    //Render the draw commands in the ImagickDraw object 
    //into the image.
    $image->drawImage($draw);
    //Send the image to the browser
    header("Content-Type: image/png");
    echo $image->getImageBlob();
}
?>