Updating documentation

ppapi/c/pp_rect.h

 /* Copyright (c) 2010 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef PPAPI_C_PP_RECT_H_
 #define PPAPI_C_PP_RECT_H_
 
 /**
  * @file
- * Defines the API ...
+ * This file defines the APIs for creating a 2 dimensional rectangle.
  */
 
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/c/pp_stdint.h"
 
 /**
  * @addtogroup Structs
  * @{
  */
+
+/**
+ * The PP_Rect struct contains the size and location of a 2D rectangle.
+ */
 struct PP_Rect {
+
+  /**
+   * This value represents the x and y coordinates of upper-left corner of the

[dmichael(do not use this one), 2011/02/03 18:15:11]

'of upper-left'
->
'of the upper-left'

[jond, 2011/02/03 20:58:14]

Done.

+   * rectangle.
+   */
   struct PP_Point point;
+
+  /** This value represents the width and height of the rectangle. */
   struct PP_Size size;
 };
 PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_Rect, 16);
 /**
  * @}
  */
 
 /**
  * @addtogroup Functions
  * @{
  */
+
+/**
+ * PP_MakeRectFromXYWH() creates a PP_Rect given x and y coordinates and width
+ * and height dimensions as int32_t values.
+ * @param[in] x An int32_t value representing a horizontal coordinate of a
+ * point, starting with 0 as the left-most coordinate.
+ * @param[in] y An int32_t value representing a vertical coordinate of a point,
+ * starting with 0 as the top-most coordinate.
+ * @param[in] w An int32_t value representing a width.
+ * @param[in] h An int32_t value representing a height.
+ * @return A PP_Rect structure.
+ */
 PP_INLINE struct PP_Rect PP_MakeRectFromXYWH(int32_t x, int32_t y,
                                              int32_t w, int32_t h) {
   struct PP_Rect ret;
   ret.point.x = x;
   ret.point.y = y;
   ret.size.width = w;
   ret.size.height = h;
   return ret;
 }
 /**
  * @}
  */
 #endif  /* PPAPI_C_PP_RECT_H_ */