1 /* 2 * Copyright 2009, The Android Open Source Project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef WebCore_SharedBufferStream_DEFINED 27 #define WebCore_SharedBufferStream_DEFINED 28 29 #include "SkStream.h" 30 #include "SharedBuffer.h" 31 32 namespace WebCore { 33 34 /** Subclass of SkStream that wrapps a webcore SharedBuffer object. To 35 allow this object to be deleted from any thread, the impl will ensure 36 that we unref the SharedBuffer object from the correct webcore thread. 37 */ 38 class SharedBufferStream : public SkMemoryStream { 39 public: 40 SharedBufferStream(SharedBuffer* buffer); 41 virtual ~SharedBufferStream(); 42 43 private: 44 // don't allow this to change our data. should not get called, but we 45 // override here just to be sure setMemory(const void * data,size_t length,bool copyData)46 virtual void setMemory(const void* data, size_t length, bool copyData) { 47 sk_throw(); 48 } 49 50 // we share ownership of this with webkit 51 SharedBuffer* fBuffer; 52 }; 53 } 54 55 #endif 56