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| -rw-r--r-- | canvas/inc/base/canvascustomspritebase.hxx | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/canvas/inc/base/canvascustomspritebase.hxx b/canvas/inc/base/canvascustomspritebase.hxx new file mode 100644 index 000000000..c47f232e0 --- /dev/null +++ b/canvas/inc/base/canvascustomspritebase.hxx @@ -0,0 +1,261 @@ +/* -*- 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 . + */ + +#pragma once + +#include <com/sun/star/rendering/XCanvas.hpp> + +#include <basegfx/point/b2dpoint.hxx> +#include <basegfx/vector/b2dvector.hxx> +#include <basegfx/range/b2drange.hxx> +#include <base/integerbitmapbase.hxx> +#include <base/bitmapcanvasbase.hxx> + +namespace com::sun::star::rendering { class XPolyPolygon2D; } + +namespace canvas +{ + /** Helper template to handle XCustomSprite method forwarding to + CanvasCustomSpriteHelper + + Use this helper to handle the XCustomSprite part of your + implementation. + + @tpl Base + Base class to use, most probably one of the + WeakComponentImplHelperN templates with the appropriate + interfaces. At least XCustomSprite and Sprite should be among + them (why else would you use this template, then?). Base class + must have a Base( const Mutex& ) constructor (like the + WeakComponentImplHelperN templates have). + + @tpl SpriteHelper + Sprite helper implementation for the backend in question + + @tpl CanvasHelper + Canvas helper implementation for the backend in question + + @tpl Mutex + Lock strategy to use. Defaults to using the + BaseMutex-provided lock. Every time one of the methods is + entered, an object of type Mutex is created with m_aMutex as + the sole parameter, and destroyed again when the method scope + is left. + + @tpl UnambiguousBase + Optional unambiguous base class for XInterface of Base. It's + sometimes necessary to specify this parameter, e.g. if Base + derives from multiple UNO interface (were each provides its + own version of XInterface, making the conversion ambiguous) + + @see CanvasCustomSpriteHelper for further contractual + requirements towards the SpriteHelper type, and some examples. + */ + template< class Base, + class SpriteHelper, + class CanvasHelper, + class Mutex=::osl::MutexGuard, + class UnambiguousBase = css::uno::XInterface > class CanvasCustomSpriteBase : + public IntegerBitmapBase< BitmapCanvasBase2<Base, CanvasHelper, Mutex, UnambiguousBase> > + { + public: + typedef IntegerBitmapBase< BitmapCanvasBase2<Base, CanvasHelper, Mutex, UnambiguousBase> > BaseType; + + CanvasCustomSpriteBase() : + maSpriteHelper() + { + } + + /** Object is being disposed. + + Called from the cppu helper base, to notify disposal of + this object. Already releases all internal references. + + @derive when overriding this method in derived classes, + <em>always</em> call the base class' method! + */ + virtual void disposeThis() override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.disposing(); + + // pass on to base class + BaseType::disposeThis(); + } + + // XCanvas: selectively override base's methods here, for opacity tracking + virtual void SAL_CALL clear() override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.clearingContent( this ); + + // and forward to base class, which handles the actual rendering + return BaseType::clear(); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + drawBitmap( const css::uno::Reference< css::rendering::XBitmap >& xBitmap, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState ) override + { + tools::verifyArgs(xBitmap, viewState, renderState, + OSL_THIS_FUNC, + static_cast< typename BaseType::UnambiguousBaseType* >(this)); + + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.checkDrawBitmap( this, xBitmap, viewState, renderState ); + + // and forward to base class, which handles the actual rendering + return BaseType::drawBitmap( xBitmap, + viewState, + renderState ); + } + + // TODO(F3): If somebody uses the XIntegerBitmap methods to + // clear pixel (setting alpha != 1.0 there), or a compositing + // mode results in similar alpha, maSpriteHelper might + // erroneously report fully opaque sprites. Effectively, all + // render methods must be overridden here; or better, + // functionality provided at the baseclass. + + // XSprite + virtual void SAL_CALL setAlpha( double alpha ) override + { + tools::verifyRange( alpha, 0.0, 1.0 ); + + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.setAlpha( this, alpha ); + } + + virtual void SAL_CALL move( const css::geometry::RealPoint2D& aNewPos, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState ) override + { + tools::verifyArgs(aNewPos, viewState, renderState, + OSL_THIS_FUNC, + static_cast< typename BaseType::UnambiguousBaseType* >(this)); + + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.move( this, aNewPos, viewState, renderState ); + } + + virtual void SAL_CALL transform( const css::geometry::AffineMatrix2D& aTransformation ) override + { + tools::verifyArgs(aTransformation, + OSL_THIS_FUNC, + static_cast< typename BaseType::UnambiguousBaseType* >(this)); + + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.transform( this, aTransformation ); + } + + virtual void SAL_CALL clip( const css::uno::Reference< css::rendering::XPolyPolygon2D >& aClip ) override + { + // NULL xClip explicitly allowed here (to clear clipping) + + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.clip( this, aClip ); + } + + virtual void SAL_CALL setPriority( double nPriority ) override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.setPriority( this, nPriority ); + } + + virtual void SAL_CALL show() override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.show( this ); + } + + virtual void SAL_CALL hide() override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + maSpriteHelper.hide( this ); + } + + // XCustomSprite + virtual css::uno::Reference< css::rendering::XCanvas > SAL_CALL + getContentCanvas() override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return this; + } + + // Sprite + virtual bool isAreaUpdateOpaque( const ::basegfx::B2DRange& rUpdateArea ) const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return maSpriteHelper.isAreaUpdateOpaque( rUpdateArea ); + } + + virtual bool isContentChanged() const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return BaseType::mbSurfaceDirty; + } + + virtual ::basegfx::B2DPoint getPosPixel() const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return maSpriteHelper.getPosPixel(); + } + + virtual ::basegfx::B2DVector getSizePixel() const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return maSpriteHelper.getSizePixel(); + } + + virtual ::basegfx::B2DRange getUpdateArea() const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return maSpriteHelper.getUpdateArea(); + } + + virtual double getPriority() const override + { + typename BaseType::MutexType aGuard( BaseType::m_aMutex ); + + return maSpriteHelper.getPriority(); + } + + protected: + SpriteHelper maSpriteHelper; + }; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |