ppapi/api/dev/ppb_resource_array_dev.idl

   1 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2  * Use of this source code is governed by a BSD-style license that can be
   3  * found in the LICENSE file.
   4  */
   5
   6 /**
   7  * This file defines the <code>PPB_ResourceArray_Dev</code> interface.
   8  */
   9
  10 [generate_thunk]
  11
  12 label Chrome {
  13   M18 = 0.1
  14 };
  15
  16 /**
  17  * A resource array holds a list of resources and retains a reference to each of
  18  * them.
  19  */
  20 interface PPB_ResourceArray_Dev {
  21   /**
  22    * Creates a resource array.
  23    * Note: It will add a reference to each of the elements.
  24    *
  25    * @param[in] elements <code>PP_Resource</code>s to be stored in the created
  26    * resource array.
  27    * @param[in] size The number of elements.
  28    *
  29    * @return A <code>PP_Resource</code> corresponding to a resource array if
  30    * successful; 0 if failed.
  31    */
  32   PP_Resource Create([in] PP_Instance instance,
  33                      [in, size_as=size] PP_Resource[] elements,
  34                      [in] uint32_t size);
  35
  36   /**
  37    * Determines if the provided resource is a resource array.
  38    *
  39    * @param[in] resource A <code>PP_Resource</code> corresponding to a generic
  40    * resource.
  41    *
  42    * @return A <code>PP_Bool</code> that is <code>PP_TRUE</code> if the given
  43    * resource is a resource array, otherwise <code>PP_FALSE</code>.
  44    */
  45   PP_Bool IsResourceArray([in] PP_Resource resource);
  46
  47   /**
  48    * Gets the array size.
  49    *
  50    * @param[in] resource_array The resource array.
  51    *
  52    * @return How many elements are there in the array.
  53    */
  54   uint32_t GetSize([in] PP_Resource resource_array);
  55
  56   /**
  57    * Gets the element at the specified position.
  58    * Note: It doesn't add a reference to the returned resource for the caller.
  59    *
  60    * @param[in] resource_array The resource array.
  61    * @param[in] index An integer indicating a position in the array.
  62    *
  63    * @return A <code>PP_Resource</code>. Returns 0 if the index is out of range.
  64    */
  65   PP_Resource GetAt(
  66       [in] PP_Resource resource_array,
  67       [in] uint32_t index);
  68 };