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Diffstat (limited to 'sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx')
-rw-r--r-- | sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx | 491 |
1 files changed, 491 insertions, 0 deletions
diff --git a/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx b/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx new file mode 100644 index 000000000..b41bbe307 --- /dev/null +++ b/sd/source/ui/slidesorter/view/SlsLayeredDevice.cxx @@ -0,0 +1,491 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include "SlsLayeredDevice.hxx" +#include <Window.hxx> + +#include <vcl/virdev.hxx> +#include <sal/log.hxx> +#include <o3tl/safeint.hxx> +#include <osl/diagnose.h> + +#include <tools/gen.hxx> +#include <tools/fract.hxx> + +#include <functional> + +namespace sd::slidesorter::view { + +namespace { +const sal_Int32 gnMaximumLayerCount = 8; + +class LayerInvalidator : public ILayerInvalidator +{ +public: + LayerInvalidator ( + const std::shared_ptr<LayeredDevice>& rpLayeredDevice, + sd::Window *pTargetWindow, + const int nLayer) + : mpLayeredDevice(rpLayeredDevice), + mpTargetWindow(pTargetWindow), + mnLayer(nLayer) + { + } + + virtual void Invalidate (const ::tools::Rectangle& rInvalidationBox) override + { + mpLayeredDevice->Invalidate(rInvalidationBox, mnLayer); + mpTargetWindow->Invalidate(rInvalidationBox); + } + +private: + const std::shared_ptr<LayeredDevice> mpLayeredDevice; + VclPtr<sd::Window> mpTargetWindow; + const int mnLayer; +}; + +void DeviceCopy ( + vcl::RenderContext& rTargetDevice, + vcl::RenderContext const & rSourceDevice, + const ::tools::Rectangle& rBox) +{ + rTargetDevice.DrawOutDev( + rBox.TopLeft(), + rBox.GetSize(), + rBox.TopLeft(), + rBox.GetSize(), + rSourceDevice); +} + +void ForAllRectangles (const vcl::Region& rRegion, const std::function<void (const ::tools::Rectangle&)>& aFunction) +{ + OSL_ASSERT(aFunction); + RectangleVector aRectangles; + rRegion.GetRegionRectangles(aRectangles); + + if(aRectangles.empty()) + { + aFunction(::tools::Rectangle()); + } + else + { + for(const auto& rRect : aRectangles) + { + aFunction(rRect); + } + + //Region aMutableRegionCopy (rRegion); + //RegionHandle aHandle(aMutableRegionCopy.BeginEnumRects()); + //Rectangle aBox; + //while (aMutableRegionCopy.GetEnumRects(aHandle, aBox)) + // aFunction(aBox); + //aMutableRegionCopy.EndEnumRects(aHandle); + } +} + +class Layer +{ +public: + Layer(); + Layer(const Layer&) = delete; + Layer& operator=(const Layer&) = delete; + + void Initialize (sd::Window *pTargetWindow); + void InvalidateRectangle (const ::tools::Rectangle& rInvalidationBox); + void InvalidateRegion (const vcl::Region& rInvalidationRegion); + void Validate (const MapMode& rMapMode); + void Repaint ( + OutputDevice& rTargetDevice, + const ::tools::Rectangle& rRepaintRectangle); + void Resize (const Size& rSize); + void AddPainter (const SharedILayerPainter& rpPainter); + void RemovePainter (const SharedILayerPainter& rpPainter); + bool HasPainter() const; + void Dispose(); + +private: + ScopedVclPtr<VirtualDevice> mpLayerDevice; + ::std::vector<SharedILayerPainter> maPainters; + vcl::Region maInvalidationRegion; + + void ValidateRectangle (const ::tools::Rectangle& rBox); +}; +typedef std::shared_ptr<Layer> SharedLayer; + +} // end of anonymous namespace + +class LayeredDevice::LayerContainer +{ +public: + LayerContainer() {} + + bool empty() const { return mvLayers.empty(); } + + size_t size() const { return mvLayers.size(); } + + const SharedLayer& back() const { return mvLayers.back(); } + + ::std::vector<SharedLayer>::const_iterator begin() const { return mvLayers.begin(); } + ::std::vector<SharedLayer>::const_iterator end() const { return mvLayers.end(); } + + void clear() { mvLayers.clear(); } + + void pop_back() { mvLayers.pop_back(); } + + void resize(size_t n) { mvLayers.resize(n); } + + SharedLayer& operator[](size_t i) { return mvLayers[i]; } + +private: + ::std::vector<SharedLayer> mvLayers; +}; + +//===== LayeredDevice ========================================================= + +LayeredDevice::LayeredDevice (const VclPtr<sd::Window>& pTargetWindow) + : mpTargetWindow(pTargetWindow), + mpLayers(new LayerContainer()), + mpBackBuffer(VclPtr<VirtualDevice>::Create(*mpTargetWindow->GetOutDev())), + maSavedMapMode(pTargetWindow->GetMapMode()) +{ + mpBackBuffer->SetOutputSizePixel(mpTargetWindow->GetSizePixel()); +} + +LayeredDevice::~LayeredDevice() +{ +} + +void LayeredDevice::Invalidate ( + const ::tools::Rectangle& rInvalidationArea, + const sal_Int32 nLayer) +{ + if (nLayer<0 || o3tl::make_unsigned(nLayer)>=mpLayers->size()) + { + OSL_ASSERT(nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size()); + return; + } + + (*mpLayers)[nLayer]->InvalidateRectangle(rInvalidationArea); +} + +void LayeredDevice::InvalidateAllLayers (const ::tools::Rectangle& rInvalidationArea) +{ + for (size_t nLayer=0; nLayer<mpLayers->size(); ++nLayer) + (*mpLayers)[nLayer]->InvalidateRectangle(rInvalidationArea); +} + +void LayeredDevice::InvalidateAllLayers (const vcl::Region& rInvalidationRegion) +{ + for (size_t nLayer=0; nLayer<mpLayers->size(); ++nLayer) + (*mpLayers)[nLayer]->InvalidateRegion(rInvalidationRegion); +} + +void LayeredDevice::RegisterPainter ( + const SharedILayerPainter& rpPainter, + const sal_Int32 nLayer) +{ + OSL_ASSERT(mpLayers); + if ( ! rpPainter) + { + OSL_ASSERT(rpPainter); + return; + } + if (nLayer<0 || nLayer>=gnMaximumLayerCount) + { + OSL_ASSERT(nLayer>=0 && nLayer<gnMaximumLayerCount); + return; + } + + // Provide the layers. + if (o3tl::make_unsigned(nLayer) >= mpLayers->size()) + { + const sal_Int32 nOldLayerCount (mpLayers->size()); + mpLayers->resize(nLayer+1); + + for (size_t nIndex=nOldLayerCount; nIndex<mpLayers->size(); ++nIndex) + (*mpLayers)[nIndex] = std::make_shared<Layer>(); + } + + (*mpLayers)[nLayer]->AddPainter(rpPainter); + if (nLayer == 0) + (*mpLayers)[nLayer]->Initialize(mpTargetWindow); + + rpPainter->SetLayerInvalidator( + std::make_shared<LayerInvalidator>(shared_from_this(),mpTargetWindow,nLayer)); +} + +void LayeredDevice::RemovePainter ( + const SharedILayerPainter& rpPainter, + const sal_Int32 nLayer) +{ + if ( ! rpPainter) + { + OSL_ASSERT(rpPainter); + return; + } + if (nLayer<0 || o3tl::make_unsigned(nLayer)>=mpLayers->size()) + { + OSL_ASSERT(nLayer>=0 && o3tl::make_unsigned(nLayer)<mpLayers->size()); + return; + } + + rpPainter->SetLayerInvalidator(SharedILayerInvalidator()); + + (*mpLayers)[nLayer]->RemovePainter(rpPainter); + + // Remove top most layers that do not contain any painters. + while ( ! mpLayers->empty() && ! mpLayers->back()->HasPainter()) + mpLayers->pop_back(); +} + +void LayeredDevice::Repaint (const vcl::Region& rRepaintRegion) +{ + // Validate the contents of all layers (that have their own devices.) + for (auto const& it : *mpLayers) + { + it->Validate(mpTargetWindow->GetMapMode()); + } + + ForAllRectangles(rRepaintRegion, + [this] (::tools::Rectangle const& r) { this->RepaintRectangle(r); }); +} + +void LayeredDevice::RepaintRectangle (const ::tools::Rectangle& rRepaintRectangle) +{ + if (mpLayers->empty()) + return; + else if (mpLayers->size() == 1) + { + // Just copy the main layer into the target device. + (*mpLayers)[0]->Repaint(*mpTargetWindow->GetOutDev(), rRepaintRectangle); + } + else + { + // Paint all layers first into the back buffer (to avoid flickering + // due to synchronous paints) and then copy that into the target + // device. + mpBackBuffer->SetMapMode(mpTargetWindow->GetMapMode()); + for (auto const& it : *mpLayers) + { + it->Repaint(*mpBackBuffer, rRepaintRectangle); + } + DeviceCopy(*mpTargetWindow->GetOutDev(), *mpBackBuffer, rRepaintRectangle); + } +} + +void LayeredDevice::Resize() +{ + const Size aSize (mpTargetWindow->GetSizePixel()); + mpBackBuffer->SetOutputSizePixel(aSize); + for (auto const& it : *mpLayers) + { + it->Resize(aSize); + } +} + +void LayeredDevice::Dispose() +{ + for (auto const& it : *mpLayers) + { + it->Dispose(); + } + mpLayers->clear(); +} + +bool LayeredDevice::HandleMapModeChange() +{ + const MapMode& rMapMode (mpTargetWindow->GetMapMode()); + if (maSavedMapMode == rMapMode) + return false; + + const ::tools::Rectangle aLogicWindowBox ( + mpTargetWindow->PixelToLogic(::tools::Rectangle(Point(0,0), mpTargetWindow->GetSizePixel()))); + if (maSavedMapMode.GetScaleX() != rMapMode.GetScaleX() + || maSavedMapMode.GetScaleY() != rMapMode.GetScaleY() + || maSavedMapMode.GetMapUnit() != rMapMode.GetMapUnit()) + { + // When the scale has changed then we have to paint everything. + InvalidateAllLayers(aLogicWindowBox); + } + else if (maSavedMapMode.GetOrigin() != rMapMode.GetOrigin()) + { + // Window has been scrolled. Adapt contents of backbuffers and + // layer devices. + const Point aDelta (rMapMode.GetOrigin() - maSavedMapMode.GetOrigin()); + mpBackBuffer->CopyArea( + aLogicWindowBox.TopLeft(), + mpTargetWindow->PixelToLogic(Point(0,0), maSavedMapMode), + aLogicWindowBox.GetSize()); + + // Invalidate the area(s) that have been exposed. + const ::tools::Rectangle aWindowBox (Point(0,0), mpTargetWindow->GetSizePixel()); + if (aDelta.Y() < 0) + InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle( + aWindowBox.Left(), + aWindowBox.Bottom()+aDelta.Y(), + aWindowBox.Right(), + aWindowBox.Bottom()))); + else if (aDelta.Y() > 0) + InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle( + aWindowBox.Left(), + aWindowBox.Top(), + aWindowBox.Right(), + aWindowBox.Top()+aDelta.Y()))); + if (aDelta.X() < 0) + InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle( + aWindowBox.Right()+aDelta.X(), + aWindowBox.Top(), + aWindowBox.Right(), + aWindowBox.Bottom()))); + else if (aDelta.X() > 0) + InvalidateAllLayers(mpTargetWindow->PixelToLogic(::tools::Rectangle( + aWindowBox.Left(), + aWindowBox.Top(), + aWindowBox.Left()+aDelta.X(), + aWindowBox.Bottom()))); + } + else + { + // Can this happen? Lets trigger a warning when it does. + OSL_ASSERT(false); + } + + maSavedMapMode = rMapMode; + + return true; +} + +//===== Layer ================================================================= + +Layer::Layer() +{ +} + +void Layer::Initialize (sd::Window *pTargetWindow) +{ +#if 0 + (void)pTargetWindow; +#else + if ( ! mpLayerDevice) + { + mpLayerDevice.disposeAndReset(VclPtr<VirtualDevice>::Create(*pTargetWindow->GetOutDev())); + mpLayerDevice->SetOutputSizePixel(pTargetWindow->GetSizePixel()); + } +#endif +} + +void Layer::InvalidateRectangle (const ::tools::Rectangle& rInvalidationBox) +{ + maInvalidationRegion.Union(rInvalidationBox); +} + +void Layer::InvalidateRegion (const vcl::Region& rInvalidationRegion) +{ + maInvalidationRegion.Union(rInvalidationRegion); +} + +void Layer::Validate (const MapMode& rMapMode) +{ + if (mpLayerDevice && ! maInvalidationRegion.IsEmpty()) + { + vcl::Region aRegion (maInvalidationRegion); + maInvalidationRegion.SetEmpty(); + + mpLayerDevice->SetMapMode(rMapMode); + ForAllRectangles( + aRegion, + [this] (::tools::Rectangle const& r) { return this->ValidateRectangle(r); }); + } +} + +void Layer::ValidateRectangle (const ::tools::Rectangle& rBox) +{ + if ( ! mpLayerDevice) + return; + const vcl::Region aSavedClipRegion (mpLayerDevice->GetClipRegion()); + mpLayerDevice->IntersectClipRegion(rBox); + + for (const auto& rxPainter : maPainters) + { + rxPainter->Paint(*mpLayerDevice, rBox); + } + + mpLayerDevice->SetClipRegion(aSavedClipRegion); +} + +void Layer::Repaint ( + OutputDevice& rTargetDevice, + const ::tools::Rectangle& rRepaintRectangle) +{ + if (mpLayerDevice) + { + DeviceCopy(rTargetDevice, *mpLayerDevice, rRepaintRectangle); + } + else + { + for (auto const& it : maPainters) + { + it->Paint(rTargetDevice, rRepaintRectangle); + } + } +} + +void Layer::Resize (const Size& rSize) +{ + if (mpLayerDevice) + { + mpLayerDevice->SetOutputSizePixel(rSize); + maInvalidationRegion = ::tools::Rectangle(Point(0,0), rSize); + } +} + +void Layer::AddPainter (const SharedILayerPainter& rpPainter) +{ + OSL_ASSERT(::std::find(maPainters.begin(), maPainters.end(), rpPainter) == maPainters.end()); + + maPainters.push_back(rpPainter); +} + +void Layer::RemovePainter (const SharedILayerPainter& rpPainter) +{ + const ::std::vector<SharedILayerPainter>::iterator iPainter ( + ::std::find(maPainters.begin(), maPainters.end(), rpPainter)); + if (iPainter != maPainters.end()) + { + maPainters.erase(iPainter); + } + else + { + SAL_WARN("sd", "LayeredDevice::RemovePainter called for painter that is not registered"); + } +} + +bool Layer::HasPainter() const +{ + return !maPainters.empty(); +} + +void Layer::Dispose() +{ + maPainters.clear(); +} + +} // end of namespace ::sd::slidesorter::view + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |