public function MediaWatermark::addWatermark in Media watermark 7

Function to add watermark.

Parameters

object $main_img_obj: image object to add watermark

object $watermark_img_obj: watermark image object

object $watermark: watermark position object

Return value

mixed return resource of image with watermark already add

File

includes/media_watermark.inc, line 26

Media watermark class.

Class

MediaWatermark

Custom watermark class.

Code

public function addWatermark($main_img_obj, $watermark_img_obj, $watermark, $ext) {
  $main_img_obj_w = imagesx($main_img_obj);
  $main_img_obj_h = imagesy($main_img_obj);
  $watermark_img_obj_w = imagesx($watermark_img_obj);
  $watermark_img_obj_h = imagesy($watermark_img_obj);
  $vm = $watermark->ver_margin;
  $hm = $watermark->hor_margin;
  switch ($watermark->hor_position) {
    case 'left':
      $margin_x = $hm;
      break;
    case 'middle':

      // Determine center position coordinates.
      $margin_x = floor($main_img_obj_w / 2 - $watermark_img_obj_w / 2) + $hm;
      break;
    case 'right':
      $margin_x = $main_img_obj_w - $watermark_img_obj_w + $hm;
      break;
  }
  switch ($watermark->ver_position) {
    case 'top':
      $margin_y = $vm;
      break;
    case 'center':
      $margin_y = floor($main_img_obj_h / 2 - $watermark_img_obj_h / 2) + $hm;
      break;
    case 'bottom':
      $margin_y = $main_img_obj_h - $watermark_img_obj_h + $vm;
      break;
  }

  // Set the margins for stamp and get the height/width of the stamp image.
  $sx = imagesx($watermark_img_obj);
  $sy = imagesy($watermark_img_obj);
  imagecopy($main_img_obj, $watermark_img_obj, $margin_x, $margin_y, 0, 0, $sx, $sy);
  imagejpeg($main_img_obj);
  return $main_img_obj;
}