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PHP Manual :: ImagickKernel::fromMatrix



ImagickKernel::fromBuiltIn || ImagickKernel::getMatrix || ImagickKernel || PHP Manual

(PECL imagick >= 3.3.0)

ImagickKernel::fromMatrixDescription

Description

public static ImagickKernel ImagickKernel::fromMatrix ( array $matrix [, array $origin ] )

Create a kernel from an 2d matrix of values. Each value should either be a float (if the element should be used) or 'false' if the element should be skipped. For matrices that are odd sizes in both dimensions the the origin pixel will default to the centre of the kernel. For all other kernel sizes the origin pixel must be specified.

Parameters

array

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.

array

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.

Return Values

The generated ImagickKernel.

Examples

Example #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);
                
$imagickDraw->rectangle(00$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/$height/2);
    
$imagickDraw->setFillColor('rgba(0, 0, 0, 0)');
    
$imagickDraw->setStrokeColor('white');
    
$imagickDraw->circle(00$radius 10);
    
$imagickDraw->setStrokeColor('black');
    
$imagickDraw->circle(00$radius0);
    
$imagickDraw->pop();

    
$canvasWidth $width + ($imageMargin); 
    
$canvasHeight $height + ($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$canvasHeight00);
    
    
/* composite original text_layer onto shadow_layer */
    
$canvas->compositeImage($kernel, \Imagick::COMPOSITE_OVER00);
    
$canvas->setImageFormat('png');

    return 
$canvas;
}

function 
createFromMatrix() {
    
$matrix = [
        [
0.500.2],
        [
010],
        [
0.90false],
    ];

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

    return 
$kernel;
}
    
function 
fromMatrix() {
    
$kernel createFromMatrix();
    
$imagick renderKernel($kernel);

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

?>



ImagickKernel::fromBuiltIn || ImagickKernel::getMatrix || ImagickKernel || PHP Manual
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