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_Buffer_Dev</code> interface. 8 */ 9 10 label Chrome { 11 M14 = 0.4 12 }; 13 14 interface PPB_Buffer_Dev { 15 /** 16 * Allocates a buffer of the given size in bytes. The return value will have 17 * a non-zero ID on success, or zero on failure. Failure means the module 18 * handle was invalid. The buffer will be initialized to contain zeroes. 19 */ 20 PP_Resource Create( 21 [in] PP_Instance instance, 22 [in] uint32_t size_in_bytes); 23 24 /** 25 * Returns PP_TRUE if the given resource is a Buffer. Returns PP_FALSE if the 26 * resource is invalid or some type other than a Buffer. 27 */ 28 PP_Bool IsBuffer( 29 [in] PP_Resource resource); 30 31 /** 32 * Gets the size of the buffer. Returns PP_TRUE on success, PP_FALSE 33 * if the resource is not a buffer. On failure, |*size_in_bytes| is not set. 34 */ 35 PP_Bool Describe( 36 [in] PP_Resource resource, 37 [out] uint32_t size_in_bytes); 38 39 /** 40 * Maps this buffer into the plugin address space and returns a pointer to 41 * the beginning of the data. 42 */ 43 mem_t Map( 44 [in] PP_Resource resource); 45 46 /** 47 * Unmaps this buffer. 48 */ 49 void Unmap( 50 [in] PP_Resource resource); 51 }; 52
