ImageMagick ImagickKernel::fromMatrix

(PECL imagick >= 3.3.0)

ImagickKernel::fromMatrix — 설명


설명

public static ImagickKernel::fromMatrix(array $matrix, array $origin = ?): ImagickKernel

값의 2차원 행렬에서 커널을 만듭니다. 각 값은 부동 소수점(요소를 사용해야 하는 경우)이거나 요소를 건너뛰어야 하는 경우 'false'이어야 합니다. 두 차원 모두에서 크기가 홀수인 행렬의 경우 원점 픽셀은 기본적으로 커널의 중심이 됩니다. 다른 모든 커널 크기의 경우 원점 픽셀을 지정해야 합니다.


매개변수

matrix
A matrix (i.e. 2d array) of values that define the kernel. Each element should be either a float value, or FALSE if that element shouldn't be used by the kernel.
origin
Which element of the kernel should be used as the origin pixel. e.g. For a 3x3 matrix specifying the origin as [2, 2] would specify that the bottom right element should be the origin pixel.

반환 값

생성된 ImagickKernel.


Examples

예제 #1 ImagickKernel::fromMatrix()

                  
<?php

function renderKernel(ImagickKernel $imagickKernel) {
    $matrix = $imagickKernel->getMatrix();

    $imageMargin = 20;

    $tileSize = 20;
    $tileSpace = 4;
    $shadowSigma = 4;
    $shadowDropX = 20;
    $shadowDropY = 0;

    $radius = ($tileSize / 2) * 0.9;

    $rows = count($matrix);
    $columns = count($matrix[0]);

    $imagickDraw = new \ImagickDraw();

    $imagickDraw->setFillColor('#afafaf');
    $imagickDraw->setStrokeColor('none');

    $imagickDraw->translate($imageMargin, $imageMargin);
    $imagickDraw->push();

    ksort($matrix);

    foreach ($matrix as $row) {
        ksort($row);
        $imagickDraw->push();
        foreach ($row as $cell) {
            if ($cell !== false) {
                $color = intval(255 * $cell);
                $colorString = sprintf("rgb(%f, %f, %f)", $color, $color, $color);
                $imagickDraw->setFillColor($colorString);
                $imagickDraw->rectangle(0, 0, $tileSize, $tileSize);
            }
            $imagickDraw->translate(($tileSize + $tileSpace), 0);
        }
        $imagickDraw->pop();
        $imagickDraw->translate(0, ($tileSize + $tileSpace));
    }

    $imagickDraw->pop();

    $width = ($columns * $tileSize) + (($columns - 1) * $tileSpace);
    $height = ($rows * $tileSize) + (($rows - 1) * $tileSpace);

    $imagickDraw->push();
    $imagickDraw->translate($width/2 , $height/2);
    $imagickDraw->setFillColor('rgba(0, 0, 0, 0)');
    $imagickDraw->setStrokeColor('white');
    $imagickDraw->circle(0, 0, $radius - 1, 0);
    $imagickDraw->setStrokeColor('black');
    $imagickDraw->circle(0, 0, $radius, 0);
    $imagickDraw->pop();

    $canvasWidth = $width + (2 * $imageMargin);
    $canvasHeight = $height + (2 * $imageMargin);

    $kernel = new \Imagick();
    $kernel->newPseudoImage(
        $canvasWidth,
        $canvasHeight,
        'canvas:none'
    );

    $kernel->setImageFormat('png');
    $kernel->drawImage($imagickDraw);

    /* create drop shadow on it's own layer */
    $canvas = $kernel->clone();
    $canvas->setImageBackgroundColor(new \ImagickPixel('rgb(0, 0, 0)'));
    $canvas->shadowImage(100, $shadowSigma, $shadowDropX, $shadowDropY);

    $canvas->setImagePage($canvasWidth, $canvasHeight, -5, -5);
    $canvas->cropImage($canvasWidth, $canvasHeight, 0, 0);

    /* composite original text_layer onto shadow_layer */
    $canvas->compositeImage($kernel, \Imagick::COMPOSITE_OVER, 0, 0);
    $canvas->setImageFormat('png');

    return $canvas;
}

function createFromMatrix() {
    $matrix = [
        [0.5, 0, 0.2],
        [0, 1, 0],
        [0.9, 0, false],
    ];

    $kernel = \ImagickKernel::fromMatrix($matrix);

    return $kernel;
}

function fromMatrix() {
    $kernel = createFromMatrix();
    $imagick = renderKernel($kernel);

    header("Content-Type: image/png");
    echo $imagick->getImageBlob();
}

?>