imagick.shadow.inc in Imagick 7

File

effects/imagick.shadow.inc

<?php

/**
 * Genrates a shadow around an image
 *
 * @param $image
 *   An image object. The $image->resource value will be modified by this call.
 * @param $color
 *   The color of the shadow.
 * @param $opacity
 *   The opacity of the shadow.
 * @param $sigma
 *   The sigma of the shadow.
 * @param $x
 *   The angle of the shadow.
 * @param $y
 *   The angle of the shadow.
 * @return
 *   TRUE or FALSE, based on success.
 */
function image_imagick_shadow(stdClass $image, $color, $opacity, $sigma, $x, $y) {
  $color = empty($color) ? 'none' : $color;
  $shadow = clone $image->resource;
  $shadow
    ->setImageBackgroundColor(new ImagickPixel($color));
  $shadow
    ->shadowImage($opacity, $sigma, $x, $y);
  $shadow
    ->compositeImage($image->resource, Imagick::COMPOSITE_OVER, $x + $sigma * 2, $y + $sigma * 2);

  // Reset image dimensions
  $dimensions = $shadow
    ->getImageGeometry();
  $shadow
    ->setImagePage($dimensions['width'], $dimensions['height'], 0, 0);
  $image->info['width'] = $dimensions['width'];
  $image->info['height'] = $dimensions['height'];
  $image->resource = $shadow;
  return $image->resource;
}

/**
 * @param $dimensions
 *   Dimensions to be modified - an array with components width and height, in
 *   pixels.
 * @param $data
 */
function imagick_shadow_dimensions(array &$dimensions, array $data) {
  if (!empty($dimensions['width']) && !empty($dimensions['height'])) {

    // Image will increase 4px
    $dimensions['width'] += $data['sigma'] * 4;
    $dimensions['height'] += $data['sigma'] * 4;
  }
}

/**
 * Implements the imagick shadow effect.
 *
 * @param $image
 *   An image object
 * @param array $data
 *   The data passed from the form
 */
function imagick_shadow($image, $data = array()) {
  image_toolkit_invoke('shadow', $image, $data);
}

/**
 * Settings form for the imagick shadow effect.
 *
 * @param $action
 *   The saved action form parameters.
 */
function imagick_shadow_form($data) {
  $data = array_merge(imagick_shadow_defaults(), (array) $data);
  $form['color'] = array(
    '#type' => 'textfield',
    '#title' => t('Color of the shadow'),
    '#default_value' => $data['color'],
    '#size' => 7,
    '#colorpicker' => TRUE,
  );
  $form['opacity'] = array(
    '#type' => 'textfield',
    '#title' => t('Opacity'),
    '#description' => t('The opacity of the shadow'),
    '#default_value' => $data['opacity'],
    '#size' => 3,
  );
  $form['sigma'] = array(
    '#type' => 'textfield',
    '#title' => t('Sigma'),
    '#description' => t('The sigma of the shadow'),
    '#default_value' => $data['sigma'],
    '#size' => 3,
  );
  $form['x'] = array(
    '#type' => 'textfield',
    '#title' => t('X'),
    '#description' => t('The X value of the shadow'),
    '#default_value' => $data['x'],
    '#size' => 3,
  );
  $form['y'] = array(
    '#type' => 'textfield',
    '#title' => t('Y'),
    '#description' => t('The Y value of the shadow'),
    '#default_value' => $data['y'],
    '#size' => 3,
  );
  return $form;
}

/**
 * Returns the default settings of this effect.
 */
function imagick_shadow_defaults() {
  return array(
    'color' => '#454545',
    'opacity' => '100',
    'sigma' => '25',
    'x' => '0',
    'y' => '0',
  );
}

Functions

Name	Description
image_imagick_shadow	Genrates a shadow around an image
imagick_shadow	Implements the imagick shadow effect.
imagick_shadow_defaults	Returns the default settings of this effect.
imagick_shadow_dimensions
imagick_shadow_form	Settings form for the imagick shadow effect.