344 lines
9.7 KiB
C++
344 lines
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#include "SlsGenericPageCache.hxx"
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#include "SlsQueueProcessor.hxx"
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#include "SlsRequestPriorityClass.hxx"
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#include "SlsRequestFactory.hxx"
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#include "cache/SlsPageCacheManager.hxx"
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#include "model/SlideSorterModel.hxx"
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#include "model/SlsPageDescriptor.hxx"
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#include "controller/SlideSorterController.hxx"
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namespace sd { namespace slidesorter { namespace cache {
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GenericPageCache::GenericPageCache (
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const Size& rPreviewSize,
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const bool bDoSuperSampling,
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const SharedCacheContext& rpCacheContext)
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: mpBitmapCache(),
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maRequestQueue(rpCacheContext),
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mpQueueProcessor(),
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mpCacheContext(rpCacheContext),
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maPreviewSize(rPreviewSize),
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mbDoSuperSampling(bDoSuperSampling)
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{
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// A large size may indicate an error of the caller. After all we
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// are creating previews.
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DBG_ASSERT (maPreviewSize.Width()<1000 && maPreviewSize.Height()<1000,
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"GenericPageCache<>::GetPreviewBitmap(): bitmap requested with large width. "
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"This may indicate an error.");
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}
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GenericPageCache::~GenericPageCache (void)
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{
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if (mpQueueProcessor.get() != NULL)
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mpQueueProcessor->Stop();
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maRequestQueue.Clear();
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if (mpQueueProcessor.get() != NULL)
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mpQueueProcessor->Terminate();
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mpQueueProcessor.reset();
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if (mpBitmapCache.get() != NULL)
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PageCacheManager::Instance()->ReleaseCache(mpBitmapCache);
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mpBitmapCache.reset();
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}
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void GenericPageCache::ProvideCacheAndProcessor (void)
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{
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if (mpBitmapCache.get() == NULL)
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mpBitmapCache = PageCacheManager::Instance()->GetCache(
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mpCacheContext->GetModel(),
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maPreviewSize);
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if (mpQueueProcessor.get() == NULL)
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mpQueueProcessor.reset(new QueueProcessor(
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maRequestQueue,
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mpBitmapCache,
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maPreviewSize,
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mbDoSuperSampling,
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mpCacheContext));
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}
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void GenericPageCache::ChangePreviewSize (
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const Size& rPreviewSize,
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const bool bDoSuperSampling)
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{
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if (rPreviewSize!=maPreviewSize || bDoSuperSampling!=mbDoSuperSampling)
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{
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// A large size may indicate an error of the caller. After all we
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// are creating previews.
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DBG_ASSERT (maPreviewSize.Width()<1000 && maPreviewSize.Height()<1000,
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"GenericPageCache<>::GetPreviewBitmap(): bitmap requested with large width. "
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"This may indicate an error.");
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if (mpBitmapCache.get() != NULL)
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{
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mpBitmapCache = PageCacheManager::Instance()->ChangeSize(
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mpBitmapCache, maPreviewSize, rPreviewSize);
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if (mpQueueProcessor.get() != NULL)
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{
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mpQueueProcessor->SetPreviewSize(rPreviewSize, bDoSuperSampling);
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mpQueueProcessor->SetBitmapCache(mpBitmapCache);
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}
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}
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maPreviewSize = rPreviewSize;
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mbDoSuperSampling = bDoSuperSampling;
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}
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}
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Bitmap GenericPageCache::GetPreviewBitmap (
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const CacheKey aKey,
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const bool bResize)
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{
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OSL_ASSERT(aKey != NULL);
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Bitmap aPreview;
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bool bMayBeUpToDate = true;
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ProvideCacheAndProcessor();
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const SdrPage* pPage = mpCacheContext->GetPage(aKey);
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if (mpBitmapCache->HasBitmap(pPage))
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{
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aPreview = mpBitmapCache->GetBitmap(pPage);
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const Size aBitmapSize (aPreview.GetSizePixel());
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if (aBitmapSize != maPreviewSize)
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{
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// Scale the bitmap to the desired size when that is possible,
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// i.e. the bitmap is not empty.
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if (bResize && aBitmapSize.Width()>0 && aBitmapSize.Height()>0)
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{
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aPreview.Scale(maPreviewSize, BMP_SCALE_FAST);
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}
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bMayBeUpToDate = false;
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}
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else
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bMayBeUpToDate = true;
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}
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else
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bMayBeUpToDate = false;
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// Request the creation of a correctly sized preview bitmap. We do this
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// even when the size of the bitmap in the cache is correct because its
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// content may be not up-to-date anymore.
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RequestPreviewBitmap(aKey, bMayBeUpToDate);
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return aPreview;
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}
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Bitmap GenericPageCache::GetMarkedPreviewBitmap (
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const CacheKey aKey,
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const bool bResize)
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{
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OSL_ASSERT(aKey != NULL);
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ProvideCacheAndProcessor();
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const SdrPage* pPage = mpCacheContext->GetPage(aKey);
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Bitmap aMarkedPreview (mpBitmapCache->GetMarkedBitmap(pPage));
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const Size aBitmapSize (aMarkedPreview.GetSizePixel());
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if (bResize && aBitmapSize != maPreviewSize)
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{
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// Scale the bitmap to the desired size when that is possible,
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// i.e. the bitmap is not empty.
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if (aBitmapSize.Width()>0 && aBitmapSize.Height()>0)
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{
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aMarkedPreview.Scale(maPreviewSize, BMP_SCALE_FAST);
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}
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}
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return aMarkedPreview;
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}
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void GenericPageCache::SetMarkedPreviewBitmap (
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const CacheKey aKey,
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const Bitmap& rMarkedBitmap)
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{
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OSL_ASSERT(aKey != NULL);
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ProvideCacheAndProcessor();
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const SdrPage* pPage = mpCacheContext->GetPage(aKey);
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mpBitmapCache->SetMarkedBitmap(pPage, rMarkedBitmap);
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}
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void GenericPageCache::RequestPreviewBitmap (
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const CacheKey aKey,
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const bool bMayBeUpToDate)
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{
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OSL_ASSERT(aKey != NULL);
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const SdrPage* pPage = mpCacheContext->GetPage(aKey);
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ProvideCacheAndProcessor();
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// Determine if the available bitmap is up to date.
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bool bIsUpToDate = false;
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if (bMayBeUpToDate)
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bIsUpToDate = mpBitmapCache->BitmapIsUpToDate (pPage);
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if (bIsUpToDate)
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{
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const Bitmap aPreview (mpBitmapCache->GetBitmap(pPage));
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if (aPreview.IsEmpty() || aPreview.GetSizePixel()!=maPreviewSize)
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bIsUpToDate = false;
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}
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if ( ! bIsUpToDate)
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{
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// No, the bitmap is not up-to-date. Request a new one.
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RequestPriorityClass ePriorityClass (NOT_VISIBLE);
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if (mpCacheContext->IsVisible(aKey))
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{
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if (mpBitmapCache->HasBitmap(pPage))
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ePriorityClass = VISIBLE_OUTDATED_PREVIEW;
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else
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ePriorityClass = VISIBLE_NO_PREVIEW;
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}
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maRequestQueue.AddRequest(aKey, ePriorityClass);
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mpQueueProcessor->Start(ePriorityClass);
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}
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}
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bool GenericPageCache::InvalidatePreviewBitmap (const CacheKey aKey)
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{
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// Invalidate the page in all caches that reference it, not just this one.
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::boost::shared_ptr<cache::PageCacheManager> pCacheManager (
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cache::PageCacheManager::Instance());
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if (pCacheManager)
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return pCacheManager->InvalidatePreviewBitmap(
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mpCacheContext->GetModel(),
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aKey);
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else if (mpBitmapCache.get() != NULL)
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return mpBitmapCache->InvalidateBitmap(mpCacheContext->GetPage(aKey));
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else
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return false;
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}
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void GenericPageCache::InvalidateCache (const bool bUpdateCache)
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{
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if (mpBitmapCache)
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{
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// When the cache is being invalidated then it makes no sense to
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// continue creating preview bitmaps. However, this may be
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// re-started below.
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mpQueueProcessor->Stop();
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maRequestQueue.Clear();
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// Mark the previews in the cache as not being up-to-date anymore.
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// Depending on the given bUpdateCache flag we start to create new
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// preview bitmaps.
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mpBitmapCache->InvalidateCache();
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if (bUpdateCache)
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RequestFactory()(maRequestQueue, mpCacheContext);
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}
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}
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void GenericPageCache::SetPreciousFlag (
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const CacheKey aKey,
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const bool bIsPrecious)
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{
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ProvideCacheAndProcessor();
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// Change the request priority class according to the new precious flag.
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if (bIsPrecious)
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{
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if (mpBitmapCache->HasBitmap(mpCacheContext->GetPage(aKey)))
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maRequestQueue.ChangeClass(aKey,VISIBLE_OUTDATED_PREVIEW);
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else
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maRequestQueue.ChangeClass(aKey,VISIBLE_NO_PREVIEW);
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}
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else
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{
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if (mpBitmapCache->IsFull())
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{
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// When the bitmap cache is full then requests for slides that
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// are not visible are removed.
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maRequestQueue.RemoveRequest(aKey);
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}
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else
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maRequestQueue.ChangeClass(aKey,NOT_VISIBLE);
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}
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mpBitmapCache->SetPrecious(mpCacheContext->GetPage(aKey), bIsPrecious);
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}
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void GenericPageCache::Pause (void)
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{
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ProvideCacheAndProcessor();
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if (mpQueueProcessor.get() != NULL)
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mpQueueProcessor->Pause();
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}
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void GenericPageCache::Resume (void)
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{
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ProvideCacheAndProcessor();
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if (mpQueueProcessor.get() != NULL)
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mpQueueProcessor->Resume();
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}
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} } } // end of namespace ::sd::slidesorter::cache
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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