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# include/cinder/Buffer.h

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    00001 /*
    00002  Copyright (c) 2010, The Barbarian Group
    00003  All rights reserved.
    00004
    00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
    00006  the following conditions are met:
    00007
    00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
    00009     the following disclaimer.
    00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
    00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
    00012
    00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
    00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
    00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
    00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
    00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    00020  POSSIBILITY OF SUCH DAMAGE.
    00021 */
    00022
    00023 #pragma once
    00024
    00025 #include "cinder/Cinder.h"
    00026
    00027 #define DEFAULT_COMPRESSION_LEVEL 6
    00028
    00029 namespace cinder {
    00030
    00031 class Buffer {
    00032  private:
    00033     struct Obj {
    00034         Obj( void * aBuffer, size_t aSize, bool aOwnsData );
    00035         ~Obj();
    00036
    00037         void    * mData;
    00038         size_t  mAllocatedSize;
    00039         size_t  mDataSize;
    00040         bool    mOwnsData;
    00041     };
    00042
    00043  public:
    00044     Buffer() {}
    00045     Buffer( void * aBuffer, size_t aSize );
    00046     Buffer( size_t size );
    00047
    00048     size_t getAllocatedSize() const { return mObj->mAllocatedSize; }
    00049     size_t getDataSize() const { return mObj->mDataSize; }
    00050     void setDataSize( size_t aSize ) { mObj->mDataSize = aSize; }
    00051
    00052     void * getData() { return mObj->mData; }
    00053     const void * getData() const { return mObj->mData; }
    00054
    00056     shared_ptr<uint8_t> convertToSharedPtr();
    00057
    00058     void resize( size_t newSize );
    00059
    00060     void copyFrom( const void * aData, size_t length );
    00061     //TODO: copy from region of another buffer
    00062
    00063   private:
    00064     shared_ptr<Obj>     mObj;
    00065
    00066   public:
    00068
    00069     typedef shared_ptr<Obj> Buffer::*unspecified_bool_type;
    00070     operator unspecified_bool_type() { return ( mObj.get() == 0 ) ? 0 : &Buffer::mObj; }
    00071     void reset() { mObj.reset(); }
    00073 };
    00074
    00075 Buffer compressBuffer( const Buffer &aBuffer, int8_t compressionLevel = DEFAULT_COMPRESSION_LEVEL, bool resizeResult = true );
    00076 Buffer decompressBuffer( const Buffer &aBuffer, bool resizeResult = true );
    00077
    00078 } //namespace