Reinforce API description

Change-Id: I19147d1cc937af2a714504039ae27af9cbfd59be
Signed-off-by: Minje Ahn <minje.ahn@samsung.com>

diff --git a/include/thumbnail_util.h b/include/thumbnail_util.h
index 1773eee..429b657 100755 (executable)
--- a/include/thumbnail_util.h
+++ b/include/thumbnail_util.h
@@ -193,6 +193,7 @@ int thumbnail_util_destroy(thumbnail_h thumb) TIZEN_DEPRECATED_API;
  * @remarks http://tizen.org/privilege/mediastorage is needed if input or output path points to media storage. \n
  *          http://tizen.org/privilege/externalstorage is needed if input or output path points to external storage. \n
  *          The width and height of the thumbnail to be generated cannot exceed 2000. \n
+ *          The width and height of the thumbnail to be generated cannot exceed the original resolution. \n
  *
  * @param[in] path       The path of the original media file
  * @param[in] width      The width of the thumbnail
@@ -220,6 +221,7 @@ int thumbnail_util_extract_to_file(const char *path, unsigned int width, unsigne
  * @remarks http://tizen.org/privilege/mediastorage is needed if input or output path points to media storage. \n
  *          http://tizen.org/privilege/externalstorage is needed if input or output path points to external storage. \n
  *          The width and height of the thumbnail to be generated cannot exceed 2000. \n
+ *          The width and height of the thumbnail to be generated cannot exceed the original resolution. \n
  *          In the case of video file, color space of the generated thumbnail is RGB. \n
  *          In the case of image file, color space of the generated thumbnail is BGRA. \n
  *          The @a thumb_buffer should be released using free().