PHP
Image/ImageMagick

ImagickKernel::fromBuiltIn

ImagickKernel::fromBuiltIn

(PECL imagick >= 3.3.0)

ImagickKernel::fromBuiltIn — Description

Description

public static ImagickKernel ImagickKernel::fromBuiltin ( string $kernelType , string $kernelString )

Create a kernel from a builtin in kernel. See http://www.imagemagick.org/Usage/morphology/#kernel for examples. Currently the 'rotation' symbols are not supported. Example: $diamondKernel = ImagickKernel::fromBuiltIn(\Imagick::KERNEL_DIAMOND, "2"

Parameters

kerneltype

The type of kernel to build e.g. \Imagick::KERNEL_DIAMOND

kernelString

A string that describes the parameters e.g. "4,2.5"

Return Values

Examples

Example #1 ImagickKernel::fromBuiltin()

<?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 $canvas; } function createFromBuiltin($kernelType, $kernelFirstTerm, $kernelSecondTerm, $kernelThirdTerm) {     $string = '';     if ($kernelFirstTerm != false && strlen(trim($kernelFirstTerm)) != 0) {         $string .= $kernelFirstTerm;         if ($kernelSecondTerm != false && strlen(trim($kernelSecondTerm)) != 0) {             $string .= ','.$kernelSecondTerm;             if ($kernelThirdTerm != false && strlen(trim($kernelThirdTerm)) != 0) {                 $string .= ','.$kernelThirdTerm;             }         }     }     $kernel = ImagickKernel::fromBuiltIn(         $kernelType,         $string          return $kernel; }      function fromBuiltin($kernelType, $kernelFirstTerm, $kernelSecondTerm, $kernelThirdTerm) {     $diamondKernel = createFromBuiltin($kernelType, $kernelFirstTerm, $kernelSecondTerm, $kernelThirdTerm     $imagick = renderKernel($diamondKernel     header("Content-Type: image/png"     echo $imagick->getImageBlob( } fromBuiltin(\Imagick::KERNEL_DIAMOND, 2, false, false ?>

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