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/*
* Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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 "ImageSource.h"
#include "ImageDecoderQt.h"
namespace WebCore {
NativeImagePtr ImageSource::createFrameAtIndex(size_t index)
{
return m_decoder ? m_decoder->imageAtIndex(index) : 0;
}
float ImageSource::frameDurationAtIndex(size_t index)
{
if (!m_decoder)
return 0;
// Many annoying ads specify a 0 duration to make an image flash as quickly
// as possible. We follow WinIE's behavior and use a duration of 100 ms
// for any frames that specify a duration of <= 50 ms. See
// <http://bugs.webkit.org/show_bug.cgi?id=14413> or Radar 4051389 for
// more.
const float duration = m_decoder->duration(index) / 1000.0f;
return (duration < 0.051f) ? 0.100f : duration;
}
bool ImageSource::frameHasAlphaAtIndex(size_t index)
{
return frameIsCompleteAtIndex(index) && m_decoder->supportsAlpha() &&
m_decoder->imageAtIndex(index)->hasAlphaChannel();
}
bool ImageSource::frameIsCompleteAtIndex(size_t index)
{
return m_decoder && m_decoder->imageAtIndex(index);
}
}
// vim: ts=4 sw=4 et
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