function _textimage_background_image_resize in Textimage 7.3

Recalculate background image size.

When wrapper overflows the original image, and autoextent is set on.

2 calls to _textimage_background_image_resize()

textimage_text_effect in effects/textimage_text.inc

Implements 'textimage_text' image effect callback.

textimage_text_effect_dimensions in effects/textimage_text.inc

Implements 'textimage_text' image dimensions callback.

File

effects/textimage_text.inc, line 1020

Implementation of the 'textimage_text' image effect.

Code

function _textimage_background_image_resize($image, $wrapper, $data, &$image_new, &$frame = NULL) {
  $resized = FALSE;

  // Background image dimensions.
  $image_width = $image->info['width'];
  $image_height = $image->info['height'];

  // Wrapper image dimensions.
  $wrapper_width = $wrapper->info['width'];
  $wrapper_height = $wrapper->info['height'];

  // Determine wrapper offset, based on placement option.
  // This is just taking into account the image and wrapper dimensions;
  // additional offset explicitly specified is considered later.
  $x_offset = ceil(image_filter_keyword($data['layout']['x_pos'], $image_width, $wrapper_width));
  $y_offset = ceil(image_filter_keyword($data['layout']['y_pos'], $image_height, $wrapper_height));

  // The position of the wrapper, once offset as per explicit
  // input. Width and height are not relevant for the algorithm,
  // but would be determined as follows:
  // Width:
  //  if ($wrapper_width < $image_width) then
  //  $wrapper_width + abs($data['layout']['x_offset']) else
  //  $wrapper_width
  // Height:
  //  if ($wrapper_height < $image_height) then
  //  $wrapper_height + abs($data['layout']['y_offset']) else
  //  $wrapper_height
  $offset_wrapper = array(
    'xpos' => $x_offset + $data['layout']['x_offset'],
    'ypos' => $y_offset + $data['layout']['y_offset'],
  );

  // If offset wrapper overflows to the left, background image
  // will be shifted to the right.
  if ($offset_wrapper['xpos'] < 0) {
    $image_new['width'] = $image_width - $offset_wrapper['xpos'];
    $image_new['xpos'] = -$offset_wrapper['xpos'];
    $offset_wrapper['xpos'] = 0;
    if (isset($frame)) {
      $frame['left'] = $image_new['width'] - $image_width;
    }
    $resized = TRUE;
  }

  // If offset wrapper overflows to the top, background image
  // will be shifted to the bottom.
  if ($offset_wrapper['ypos'] < 0) {
    $image_new['height'] = $image_height - $offset_wrapper['ypos'];
    $image_new['ypos'] = -$offset_wrapper['ypos'];
    $offset_wrapper['ypos'] = 0;
    if (isset($frame)) {
      $frame['top'] = $image_new['height'] - $image_height;
    }
    $resized = TRUE;
  }

  // If offset wrapper overflows to the right, background image
  // will be extended to the right.
  if ($offset_wrapper['xpos'] + $wrapper_width > $image_new['width']) {
    $tmp = $image_new['width'];
    $image_new['width'] = $offset_wrapper['xpos'] + $wrapper_width;
    if (isset($frame)) {
      $frame['right'] = $image_new['width'] - $tmp;
    }
    $resized = TRUE;
  }

  // If offset wrapper overflows to the bottom, background image
  // will be extended to the bottom.
  if ($offset_wrapper['ypos'] + $wrapper_height > $image_new['height']) {
    $tmp = $image_new['height'];
    $image_new['height'] = $offset_wrapper['ypos'] + $wrapper_height;
    if (isset($frame)) {
      $frame['bottom'] = $image_new['height'] - $tmp;
    }
    $resized = TRUE;
  }
  return array(
    $resized,
    $offset_wrapper,
  );
}