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Diffstat (limited to 'canvas/inc/base/canvasbase.hxx')
| -rw-r--r-- | canvas/inc/base/canvasbase.hxx | 450 |
1 files changed, 450 insertions, 0 deletions
diff --git a/canvas/inc/base/canvasbase.hxx b/canvas/inc/base/canvasbase.hxx new file mode 100644 index 000000000..24737f784 --- /dev/null +++ b/canvas/inc/base/canvasbase.hxx @@ -0,0 +1,450 @@ +/* -*- 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/uno/Reference.hxx> +#include <com/sun/star/uno/Sequence.hxx> +#include <com/sun/star/rendering/TextDirection.hpp> +#include <osl/mutex.hxx> +#include <verifyinput.hxx> + +namespace com::sun::star::beans { struct PropertyValue; } +namespace com::sun::star::geometry { class XMapping2D; } +namespace com::sun::star::rendering { class XBitmap; } +namespace com::sun::star::rendering { class XCachedPrimitive; } +namespace com::sun::star::rendering { class XCanvasFont; } +namespace com::sun::star::rendering { class XGraphicDevice; } +namespace com::sun::star::rendering { class XPolyPolygon2D; } +namespace com::sun::star::rendering { class XTextLayout; } +namespace com::sun::star::rendering { struct FontInfo; } +namespace com::sun::star::rendering { struct StringContext; } + + +namespace canvas +{ + /** Helper template to handle XCanvas method forwarding to CanvasHelper + + Use this helper to handle the XCanvas part of your + implementation. In theory, we could have provided CanvasHelper + and CanvasBase as a single template, but that would duplicate + a lot of code now residing in CanvasHelper only. + + This template basically interposes itself between the full + interface you implement (i.e. not restricted to XCanvas. The + problem with UNO partial interface implementation actually is, + that you cannot do it the plain way, since deriving from a + common base subclass always introduces the whole set of pure + virtuals, that your baseclass helper just overridden) and your + implementation class. You then only have to implement the + functionality <em>besides</em> XCanvas. + + <pre> + Example: + typedef ::cppu::WeakComponentImplHelper < css::rendering::XSpriteCanvas, + css::lang::XInitialization, + css::lang::XServiceInfo, + css::lang::XServiceName > CanvasBase_Base; + typedef ::canvas::internal::CanvasBase< CanvasBase_Base, CanvasHelper > ExampleCanvas_Base; + + class ExampleCanvas : public ExampleCanvas_Base, + public SpriteSurface, + public RepaintTarget + { + }; + </pre> + + @tpl Base + Base class to use, most probably the + WeakComponentImplHelper template with the appropriate + interfaces. At least XCanvas should be among them (why else + would you use this template, then?). Base class must have an + Base( const Mutex& ) constructor (like the + WeakComponentImplHelper template has). As the very least, + the base class must be derived from uno::XInterface, as some + error reporting mechanisms rely on that. + + @tpl CanvasHelper + Canvas helper implementation for the backend in question. This + object will be held as a member of this template class, and + basically gets forwarded all XCanvas API calls. Furthermore, + every time the canvas API semantically changes the content of + the canvas, CanvasHelper::modifying() will get called + (<em>before</em> the actual modification takes place). + + @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) + */ + template< class Base, + class CanvasHelper, + class Mutex=::osl::MutexGuard, + class UnambiguousBase=css::uno::XInterface > class CanvasBase : + public Base + { + public: + typedef Base BaseType; + typedef Mutex MutexType; + typedef UnambiguousBase UnambiguousBaseType; + + /** Create CanvasBase + */ + CanvasBase() : + maCanvasHelper(), + mbSurfaceDirty( true ) + { + } + + virtual void disposeThis() override + { + MutexType aGuard( BaseType::m_aMutex ); + + maCanvasHelper.disposing(); + + // pass on to base class + BaseType::disposeThis(); + } + + // XCanvas + virtual void SAL_CALL clear() override + { + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + maCanvasHelper.clear(); + } + + virtual void SAL_CALL drawPoint(const css::geometry::RealPoint2D& aPoint, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState) override + { + tools::verifyArgs(aPoint, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + } + + virtual void SAL_CALL drawLine(const css::geometry::RealPoint2D& aStartPoint, + const css::geometry::RealPoint2D& aEndPoint, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState) override + { + tools::verifyArgs(aStartPoint, aEndPoint, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + maCanvasHelper.drawLine( this, aStartPoint, aEndPoint, viewState, renderState ); + } + + virtual void SAL_CALL drawBezier( const css::geometry::RealBezierSegment2D& aBezierSegment, + const css::geometry::RealPoint2D& aEndPoint, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState ) override + { + tools::verifyArgs(aBezierSegment, aEndPoint, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + maCanvasHelper.drawBezier( this, aBezierSegment, aEndPoint, viewState, renderState ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + drawPolyPolygon(const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.drawPolyPolygon( this, xPolyPolygon, viewState, renderState ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + strokePolyPolygon(const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::rendering::StrokeAttributes& strokeAttributes) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, strokeAttributes, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.strokePolyPolygon( this, xPolyPolygon, viewState, renderState, strokeAttributes ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + strokeTexturedPolyPolygon( const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::uno::Sequence< css::rendering::Texture >& textures, + const css::rendering::StrokeAttributes& strokeAttributes ) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, strokeAttributes, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.strokeTexturedPolyPolygon( this, xPolyPolygon, viewState, renderState, textures, strokeAttributes ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + strokeTextureMappedPolyPolygon( const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::uno::Sequence< css::rendering::Texture >& textures, + const css::uno::Reference< css::geometry::XMapping2D >& xMapping, + const css::rendering::StrokeAttributes& strokeAttributes ) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, textures, xMapping, strokeAttributes, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.strokeTextureMappedPolyPolygon( this, xPolyPolygon, viewState, renderState, textures, xMapping, strokeAttributes ); + } + + virtual css::uno::Reference< css::rendering::XPolyPolygon2D > SAL_CALL + queryStrokeShapes( const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::rendering::StrokeAttributes& strokeAttributes ) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, strokeAttributes, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.queryStrokeShapes( this, xPolyPolygon, viewState, renderState, strokeAttributes ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + fillPolyPolygon(const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.fillPolyPolygon( this, xPolyPolygon, viewState, renderState ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + fillTexturedPolyPolygon(const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::uno::Sequence< css::rendering::Texture >& textures) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, textures, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.fillTexturedPolyPolygon( this, xPolyPolygon, viewState, renderState, textures ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + fillTextureMappedPolyPolygon( const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + const css::uno::Sequence< css::rendering::Texture >& textures, + const css::uno::Reference< css::geometry::XMapping2D >& xMapping ) override + { + tools::verifyArgs(xPolyPolygon, viewState, renderState, textures, xMapping, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.fillTextureMappedPolyPolygon( this, xPolyPolygon, viewState, renderState, textures, xMapping ); + } + + + virtual css::uno::Reference< css::rendering::XCanvasFont > SAL_CALL + createFont( const css::rendering::FontRequest& fontRequest, + const css::uno::Sequence< css::beans::PropertyValue >& extraFontProperties, + const css::geometry::Matrix2D& fontMatrix ) override + { + tools::verifyArgs(fontRequest, + // dummy, to keep argPos in sync + fontRequest, + fontMatrix, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + return maCanvasHelper.createFont( this, fontRequest, extraFontProperties, fontMatrix ); + } + + + virtual css::uno::Sequence< css::rendering::FontInfo > SAL_CALL + queryAvailableFonts( const css::rendering::FontInfo& aFilter, + const css::uno::Sequence< css::beans::PropertyValue >& aFontProperties ) override + { + tools::verifyArgs(aFilter, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + return maCanvasHelper.queryAvailableFonts( this, aFilter, aFontProperties ); + } + + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + drawText(const css::rendering::StringContext& text, + const css::uno::Reference< css::rendering::XCanvasFont >& xFont, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState, + sal_Int8 textDirection) override + { + tools::verifyArgs(xFont, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + tools::verifyRange( textDirection, + css::rendering::TextDirection::WEAK_LEFT_TO_RIGHT, + css::rendering::TextDirection::STRONG_RIGHT_TO_LEFT ); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.drawText( this, text, xFont, viewState, renderState, textDirection ); + } + + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + drawTextLayout(const css::uno::Reference< css::rendering::XTextLayout >& laidOutText, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState) override + { + tools::verifyArgs(laidOutText, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.drawTextLayout( this, laidOutText, viewState, renderState ); + } + + + 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, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.drawBitmap( this, xBitmap, viewState, renderState ); + } + + virtual css::uno::Reference< css::rendering::XCachedPrimitive > SAL_CALL + drawBitmapModulated( const css::uno::Reference< css::rendering::XBitmap >& xBitmap, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState ) override + { + tools::verifyArgs(xBitmap, viewState, renderState, + __func__, + static_cast< UnambiguousBaseType* >(this)); + + MutexType aGuard( BaseType::m_aMutex ); + + mbSurfaceDirty = true; + + return maCanvasHelper.drawBitmapModulated( this, xBitmap, viewState, renderState ); + } + + virtual css::uno::Reference< css::rendering::XGraphicDevice > SAL_CALL + getDevice() override + { + MutexType aGuard( BaseType::m_aMutex ); + + return maCanvasHelper.getDevice(); + } + + protected: + ~CanvasBase() {} // we're a ref-counted UNO class. _We_ destroy ourselves. + + CanvasHelper maCanvasHelper; + mutable bool mbSurfaceDirty; + + private: + CanvasBase( const CanvasBase& ) = delete; + CanvasBase& operator=( const CanvasBase& ) = delete; + }; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |