function canvasactions_definecanvas_image in ImageCache Actions 5.2

Same name and namespace in other branches

1. 5.3 canvasactions.inc \canvasactions_definecanvas_image()
2. 6.2 canvasactions/canvasactions.inc \canvasactions_definecanvas_image()
3. 6 canvasactions.inc \canvasactions_definecanvas_image()

Implementation of hook_image()

Creates a solid background canvas

Process the imagecache action on the passed image

Parameters

$image: array defining an image file, including :

$image- >source as the filename,

$image->info array

$image->resource handle on the image object

File

./canvasactions.inc, line 140

Code

function canvasactions_definecanvas_image(&$image, $action = array()) {

  // May be given either exact or relative dimensions.
  if ($action['exact']['width'] || $action['exact']['width']) {

    // Allows only one dimension to be used if the other is unset.
    if (!$action['exact']['width']) {
      $action['exact']['width'] = $image->info['width'];
    }
    if (!$action['exact']['height']) {
      $action['exact']['height'] = $image->info['height'];
    }
    $targetsize['width'] = _imagecache_percent_filter($action['exact']['width'], $image->info['width']);
    $targetsize['height'] = _imagecache_percent_filter($action['exact']['height'], $image->info['height']);
    $targetsize['left'] = _imagecache_keyword_filter($action['exact']['xpos'], $targetsize['width'], $image->info['width']);
    $targetsize['top'] = _imagecache_keyword_filter($action['exact']['ypos'], $targetsize['height'], $image->info['height']);
  }
  else {

    // calculate relative size
    $targetsize['width'] = $image->info['width'] + $action['relative']['leftdiff'] + $action['relative']['rightdiff'];
    $targetsize['height'] = $image->info['height'] + $action['relative']['topdiff'] + $action['relative']['bottomdiff'];
    $targetsize['left'] = $action['relative']['leftdiff'];
    $targetsize['top'] = $action['relative']['topdiff'];
  }
  $newcanvas = imagecreatetruecolor($targetsize['width'], $targetsize['height']);
  $RGB = $action['RGB'];

  // convert from hex (as it is stored in the UI)
  if ($RGB['HEX'] && ($deduced = hex_to_rgb($RGB['HEX']))) {
    $RGB = array_merge($RGB, $deduced);
  }
  if ($RGB['red'] || $RGB['green'] || $RGB['blue']) {

    // one may be zero...
    $background = imagecolorallocate($newcanvas, $RGB['red'], $RGB['green'], $RGB['blue']);
  }
  else {

    // No color, attempt transparency, assume white
    $background = imagecolorallocatealpha($newcanvas, 255, 255, 255, 127);
    imagesavealpha($newcanvas, TRUE);
    imagealphablending($newcanvas, false);
    imagesavealpha($image->resource, TRUE);
  }
  imagefilledrectangle($newcanvas, 0, 0, $targetsize['width'], $targetsize['height'], $background);
  if ($action['under']) {
    require_once 'watermark.inc';
    $watermark = new watermark();
    $image->resource = $watermark
      ->create_watermark($newcanvas, $image->resource, $targetsize['left'], $targetsize['top'], 100);
    imagesavealpha($image->resource, TRUE);
  }
  else {
    $image->resource = $newcanvas;
  }
  $image->info['width'] = $targetsize['width'];
  $image->info['height'] = $targetsize['height'];
  return TRUE;
}