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198 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2005-06-14
* Description : digiKam 8/16 bits image management API.
* Data management.
*
* SPDX-FileCopyrightText: 2005-2025 by Gilles Caulier <caulier dot gilles at gmail dot com>
* SPDX-FileCopyrightText: 2006-2013 by Marcel Wiesweg <marcel dot wiesweg at gmx dot de>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#include "dimg_p.h"
namespace Digikam
{
DImg& DImg::operator=(const DImg& image)
{
m_priv = image.m_priv;
return *this;
}
bool DImg::operator==(const DImg& image) const
{
return (m_priv == image.m_priv);
}
void DImg::reset()
{
m_priv = new Private;
}
void DImg::detach()
{
// are we being shared?
if (m_priv->ref == 1)
{
return;
}
QExplicitlySharedDataPointer<Private> old(m_priv);
m_priv = new Private;
copyImageData(old);
copyMetaData(old);
if (old->data)
{
size_t size = allocateData();<--- Shadow variable
memcpy(m_priv->data, old->data, size);
}
}
void DImg::putImageData(uint width, uint height, bool sixteenBit, bool alpha, uchar* const data, bool copyData)
{
// set image data, metadata is untouched
bool null = (width == 0) || (height == 0);
// allocateData, or code below will set null to false
setImageData(true, width, height, sixteenBit, alpha);
// replace data
delete [] m_priv->data;
m_priv->data = nullptr;
if (null)
{
// image is null - no data
return;
}
else if (copyData)
{
size_t size = allocateData();<--- Shadow variable
// cppcheck-suppress knownConditionTrueFalse
if (m_priv->data && data)
{
memcpy(m_priv->data, data, size);
}
}
else
{
if (data)
{
m_priv->data = data;
m_priv->null = false;
}
else
{
allocateData();
}
}
}
void DImg::putImageData(uchar* const data, bool copyData)
{
if (!data)
{
delete [] m_priv->data;
m_priv->data = nullptr;
m_priv->null = true;
}
else if (copyData)
{
memcpy(m_priv->data, data, numBytes());
}
else
{
m_priv->data = data;
}
}
void DImg::resetMetaData()
{
m_priv->attributes.clear();
m_priv->embeddedText.clear();
m_priv->metaData = MetaEngineData();
}
uchar* DImg::stripImageData()
{
uchar* const data = m_priv->data;
m_priv->data = nullptr;
m_priv->null = true;
return data;
}
void DImg::copyMetaData(const QExplicitlySharedDataPointer<Private>& src)
{
m_priv->metaData = src->metaData;
m_priv->attributes = src->attributes;
m_priv->embeddedText = src->embeddedText;
m_priv->iccProfile = src->iccProfile;
m_priv->imageHistory = src->imageHistory;
// FIXME: what about sharing and deleting lanczos_func?
}
void DImg::copyImageData(const QExplicitlySharedDataPointer<Private>& src)
{
setImageData(src->null, src->width, src->height, src->sixteenBit, src->alpha);
}
size_t DImg::allocateData() const
{
quint64 size = (quint64)m_priv->width *<--- Shadow variable
(quint64)m_priv->height *
(quint64)(m_priv->sixteenBit ? 8 : 4);
if (size >= std::numeric_limits<size_t>::max())
{
m_priv->null = true;
return 0;
}
m_priv->data = DImgLoader::new_failureTolerant(size);
if (!m_priv->data)
{
m_priv->null = true;
return 0;
}
m_priv->null = false;
return size;
}
void DImg::setImageDimension(uint width, uint height)
{
m_priv->width = width;
m_priv->height = height;
}
void DImg::setImageData(bool null, uint width, uint height, bool sixteenBit, bool alpha)
{
m_priv->null = null;
m_priv->width = width;
m_priv->height = height;
m_priv->alpha = alpha;
m_priv->sixteenBit = sixteenBit;
}
} // namespace Digikam
|