function image_get_derivative_sizes in Image 6

Same name and namespace in other branches

1. 5.2 image.module \image_get_derivative_sizes()
2. 5 image.module \image_get_derivative_sizes()

Determine which sizes of derivative images need to be built for this image.

Parameters

$image_path: String file path to the image.

Return value

Returns a subset of image_get_sizes()'s results depending on what derivative images are needed.

4 calls to image_get_derivative_sizes()

image_insert in ./image.module

Implementation of hook_insert().

image_update in ./image.module

Implementation of hook_update().

_image_build_derivatives in ./image.module

Generate image derivatives.

_image_build_derivatives_if_needed in ./image.module

Rebuild derivatives if needed. Helper function for image_load().

File

./image.module, line 800

Code

function image_get_derivative_sizes($image_path) {
  $sizes = array();

  // Can't do much if we can't read the image.
  if (!($image_info = image_get_info($image_path))) {
    return $sizes;
  }
  $all_sizes = image_get_sizes(NULL, $image_info['height'] / $image_info['width']);
  foreach ($all_sizes as $key => $size) {

    // We don't want to include the original.
    if ($key == IMAGE_ORIGINAL) {
      continue;
    }

    // If the original isn't bigger than the requested size then there's no
    // need to resize it.
    if ($image_info['width'] > $size['width'] || $image_info['height'] > $size['height']) {
      $sizes[$key] = $size;
    }
  }
  return $sizes;
}