function imageapi_gd_image_definecanvas in ImageCache Actions 6

Same name and namespace in other branches

1. 6.2 canvasactions/canvasactions.inc \imageapi_gd_image_definecanvas()

Draw a color (or transparency) behind an image

$targetsize is an array expected to contain a width,height and a left,top offset.

File

./canvasactions.inc, line 255

Helper functions for the text2canvas action for imagecache

Code

function imageapi_gd_image_definecanvas(&$image, $action = array()) {
  $targetsize = $action['targetsize'];
  $RGB = $action['RGB'];
  $newcanvas = imagecreatetruecolor($targetsize['width'], $targetsize['height']);
  if ($RGB['HEX']) {
    $background = imagecolorallocate($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);

  #  imagealphablending($newcanvas, TRUE);
  if ($action['under']) {
    $canvas_object = (object) array(
      'resource' => $newcanvas,
      'info' => array(
        'width' => $targetsize['width'],
        'height' => $targetsize['height'],
        'mime_type' => $image->info['mime_type'],
        'extension' => $image->info['extension'],
      ),
      'toolkit' => $image->toolkit,
    );
    imageapi_image_overlay($canvas_object, $image, $targetsize['left'], $targetsize['top'], 100, TRUE);
  }
  else {
    $image->resource = $newcanvas;
  }
  return TRUE;
}