/* * Copyright (C) 2008 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "ImageData.h" namespace WebCore { PassRefPtr<ImageData> ImageData::create(const IntSize& size) { Checked<int, RecordOverflow> dataSize = 4; dataSize *= size.width(); dataSize *= size.height(); if (dataSize.hasOverflowed()) return 0; return adoptRef(new ImageData(size)); } PassRefPtr<ImageData> ImageData::create(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray) { Checked<int, RecordOverflow> dataSize = 4; dataSize *= size.width(); dataSize *= size.height(); if (dataSize.hasOverflowed()) return 0; if (dataSize.unsafeGet() < 0 || static_cast<unsigned>(dataSize.unsafeGet()) > byteArray->length()) return 0; return adoptRef(new ImageData(size, byteArray)); } ImageData::ImageData(const IntSize& size) : m_size(size) , m_data(Uint8ClampedArray::createUninitialized(size.width() * size.height() * 4)) { } ImageData::ImageData(const IntSize& size, PassRefPtr<Uint8ClampedArray> byteArray) : m_size(size) , m_data(byteArray) { ASSERT_WITH_SECURITY_IMPLICATION(static_cast<unsigned>(size.width() * size.height() * 4) <= m_data->length()); } }