1 /* 2 * Copyright (C) 2008 Apple Inc. All rights reserved. 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "config.h" 30 #include "core/html/ImageData.h" 31 32 namespace WebCore { 33 34 PassRefPtr<ImageData> ImageData::create(const IntSize& size) 35 { 36 Checked<int, RecordOverflow> dataSize = 4; 37 dataSize *= size.width(); 38 dataSize *= size.height(); 39 if (dataSize.hasOverflowed()) 40 return 0; 41 42 return adoptRef(new ImageData(size)); 43 } 44 45 PassRefPtr<ImageData> ImageData::create(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray) 46 { 47 Checked<int, RecordOverflow> dataSize = 4; 48 dataSize *= size.width(); 49 dataSize *= size.height(); 50 if (dataSize.hasOverflowed()) 51 return 0; 52 53 if (dataSize.unsafeGet() < 0 54 || static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length()) 55 return 0; 56 57 return adoptRef(new ImageData(size, byteArray)); 58 } 59 60 ImageData::ImageData(const IntSize& size) 61 : m_size(size) 62 , m_data(Uint8ClampedArray::createUninitialized(size.width() * size.height() * 4)) 63 { 64 ScriptWrappable::init(this); 65 } 66 67 ImageData::ImageData(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray) 68 : m_size(size) 69 , m_data(byteArray) 70 { 71 ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length()); 72 ScriptWrappable::init(this); 73 } 74 75 } 76 77
