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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2007-02-03
* Description : Loading parameters for multithreaded loading
*
* Copyright (C) 2006-2007 by Marcel Wiesweg <marcel.wiesweg@gmx.de>
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ============================================================ */
// Local includes.
#include "loadingdescription.h"
namespace Digikam
{
bool LoadingDescription::PreviewParameters::operator==(const PreviewParameters &other) const
{
return isPreview == other.isPreview
&& size == other.size
&& exifRotate == other.exifRotate;
}
LoadingDescription::LoadingDescription(const TQString &filePath)
: filePath(filePath)
{
rawDecodingSettings = DRawDecoding();
}
LoadingDescription::LoadingDescription(const TQString &filePath, DRawDecoding settings)
: filePath(filePath), rawDecodingSettings(settings)
{
}
LoadingDescription::LoadingDescription(const TQString &filePath, int size, bool exifRotate)
: filePath(filePath)
{
rawDecodingSettings = DRawDecoding();
previewParameters.isPreview = false;
previewParameters.size = size;
previewParameters.exifRotate = exifRotate;
}
TQString LoadingDescription::cacheKey() const
{
// Here we have the knowledge which LoadingDescriptions / RawFileDecodingSettings
// must be cached separately.
// Current assumption:
// Eight-bit images are needed for LightTable, and if 16-bit is enabled,
// 16-bit half size images for the histogram sidebar,
// and 16-bit full size images for the image editor.
// Use previewParameters.size, not isPreview - if it is 0, full loading is used.
TQString suffix = rawDecodingSettings.sixteenBitsImage ? "-16" : "-8";
if (rawDecodingSettings.halfSizeColorImage)
return filePath + suffix + "-halfSizeColorImage";
else if (previewParameters.size)
return filePath + suffix + "-previewImage";
else
return filePath + suffix;
}
TQStringList LoadingDescription::lookupCacheKeys() const
{
// Build a hierarchy which cache entries may be used for this LoadingDescription.
// Typically, the first is the best, but an actual loading operation may use a
// lower-quality loading and will effectively only add the last entry of the
// list to the cache, although it can accept the first if already available.
// Sixteen-bit images cannot be used used instead of eight-bit ones because
// color management is needed to display them.
TQString suffix = rawDecodingSettings.sixteenBitsImage ? "-16" : "-8";
TQStringList keys;
keys.append(filePath + suffix);
if (rawDecodingSettings.halfSizeColorImage)
keys.append(filePath + suffix + "-halfSizeColorImage");
if (previewParameters.size)
keys.append(filePath + suffix + "-previewImage");
return keys;
}
bool LoadingDescription::isReducedVersion() const
{
// return true if this loads anything but the full version
return rawDecodingSettings.halfSizeColorImage
|| previewParameters.isPreview;
}
bool LoadingDescription::operator==(const LoadingDescription &other) const
{
return filePath == other.filePath &&
rawDecodingSettings == other.rawDecodingSettings &&
previewParameters == other.previewParameters;
}
bool LoadingDescription::equalsIgnoreReducedVersion(const LoadingDescription &other) const
{
return filePath == other.filePath;
}
bool LoadingDescription::equalsOrBetterThan(const LoadingDescription &other) const
{
// This method is similar to operator==. But it returns true as well if other
// Loads a "better" version than this.
// Preview parameters must have the same size, or other has no size restriction.
// All raw decoding settings must be equal, only the half size parameter is allowed to vary.
DRawDecoding fullSize = other.rawDecodingSettings;
fullSize.halfSizeColorImage = false;
return filePath == other.filePath &&
(
rawDecodingSettings == other.rawDecodingSettings ||
rawDecodingSettings == fullSize
) &&
(
(previewParameters.size == other.previewParameters.size) ||
other.previewParameters.size
);
}
TQStringList LoadingDescription::possibleCacheKeys(const TQString &filePath)
{
TQStringList keys;
keys.append(filePath + "-16");
keys.append(filePath + "-16-halfSizeColorImage");
keys.append(filePath + "-16-previewImage");
keys.append(filePath + "-8");
keys.append(filePath + "-8-halfSizeColorImage");
keys.append(filePath + "-8-previewImage");
return keys;
}
} // namespace Digikam
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