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/**
* @file llimageworker.cpp
* @brief Base class for images.
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llimageworker.h"
#include "llimagedxt.h"
//----------------------------------------------------------------------------
//static
LLWorkerThread* LLImageWorker::sWorkerThread = NULL;
S32 LLImageWorker::sCount = 0;
//static
void LLImageWorker::initImageWorker(LLWorkerThread* workerthread)
{
sWorkerThread = workerthread;
}
//static
void LLImageWorker::cleanupImageWorker()
{
}
//----------------------------------------------------------------------------
LLImageWorker::LLImageWorker(LLImageFormatted* image, U32 priority,
S32 discard,
LLPointer<LLResponder> responder)
: LLWorkerClass(sWorkerThread, "Image"),
mFormattedImage(image),
mDecodedType(-1),
mDiscardLevel(discard),
mPriority(priority),
mResponder(responder)
{
++sCount;
}
LLImageWorker::~LLImageWorker()
{
mDecodedImage = NULL;
mFormattedImage = NULL;
--sCount;
}
//----------------------------------------------------------------------------
//virtual, main thread
void LLImageWorker::startWork(S32 param)
{
llassert_always(mDecodedImage.isNull());
mDecodedType = -1;
}
bool LLImageWorker::doWork(S32 param)
{
bool decoded = false;
if(mDecodedImage.isNull())
{
if (!mFormattedImage->updateData())
{
mDecodedType = -2; // failed
return true;
}
if (mDiscardLevel >= 0)
{
mFormattedImage->setDiscardLevel(mDiscardLevel);
}
if (!(mFormattedImage->getWidth() * mFormattedImage->getHeight() * mFormattedImage->getComponents()))
{
decoded = true; // failed
}
else
{
mDecodedImage = new LLImageRaw(); // allow possibly smaller size set during decoding
}
}
if (!decoded)
{
if (param == 0)
{
// Decode primary channels
decoded = mFormattedImage->decode(mDecodedImage, .1f); // 1ms
}
else
{
// Decode aux channel
decoded = mFormattedImage->decodeChannels(mDecodedImage, .1f, param, param); // 1ms
}
}
if (decoded)
{
// Call the callback immediately; endWork doesn't get called until ckeckWork
if (mResponder.notNull())
{
bool success = (!wasAborted() && mDecodedImage.notNull() && mDecodedImage->getDataSize() != 0);
mResponder->completed(success);
}
}
return decoded;
}
void LLImageWorker::endWork(S32 param, bool aborted)
{
if (mDecodedType != -2)
{
mDecodedType = aborted ? -2 : param;
}
}
//----------------------------------------------------------------------------
BOOL LLImageWorker::requestDecodedAuxData(LLPointer<LLImageRaw>& raw, S32 channel, S32 discard)
{
// For most codecs, only mDiscardLevel data is available.
// (see LLImageDXT for exception)
if (discard >= 0 && discard != mFormattedImage->getDiscardLevel())
{
llerrs << "Request for invalid discard level" << llendl;
}
checkWork();
if (mDecodedType == -2)
{
return TRUE; // aborted, done
}
if (mDecodedType != channel)
{
if (!haveWork())
{
addWork(channel, mPriority);
}
return FALSE;
}
else
{
llassert_always(!haveWork());
llassert_always(mDecodedType == channel);
raw = mDecodedImage; // smart pointer acquires ownership of data
mDecodedImage = NULL;
return TRUE;
}
}
BOOL LLImageWorker::requestDecodedData(LLPointer<LLImageRaw>& raw, S32 discard)
{
if (mFormattedImage->getCodec() == IMG_CODEC_DXT)
{
// special case
LLImageDXT* imagedxt = (LLImageDXT*)((LLImageFormatted*)mFormattedImage);
return imagedxt->getMipData(raw, discard);
}
else
{
return requestDecodedAuxData(raw, 0, discard);
}
}
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