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| -rw-r--r-- | cppcanvas/source/inc/implrenderer.hxx | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/cppcanvas/source/inc/implrenderer.hxx b/cppcanvas/source/inc/implrenderer.hxx new file mode 100644 index 000000000..44a168ee9 --- /dev/null +++ b/cppcanvas/source/inc/implrenderer.hxx @@ -0,0 +1,246 @@ +/* -*- 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 <sal/config.h> + +#include <sal/types.h> +#include <o3tl/span.hxx> +#include <tools/stream.hxx> +#include <utility> +#include <vcl/metaactiontypes.hxx> +#include <cppcanvas/renderer.hxx> +#include <cppcanvas/canvas.hxx> + +#include "canvasgraphichelper.hxx" +#include "action.hxx" +#include "outdevstate.hxx" + +#include <osl/diagnose.h> + +#include <memory> +#include <vector> + +class GDIMetaFile; +class VirtualDevice; +class Gradient; +namespace tools { class Rectangle; } +namespace vcl { class Font; } +namespace tools { class PolyPolygon; } +class Point; +class MetaCommentAction; + +namespace basegfx { + class B2DPolyPolygon; + class B2DPolygon; +} + +namespace cppcanvas::internal + { + struct OutDevState; + struct ActionFactoryParameters; + struct XForm; + + // state stack of OutputDevice, to correctly handle + // push/pop actions + class VectorOfOutDevStates + { + public: + OutDevState& getState(); + const OutDevState& getState() const; + void pushState(vcl::PushFlags nFlags); + void popState(); + void clearStateStack(); + private: + std::vector< OutDevState > m_aStates; + }; + + // EMF+ + // Transformation matrix (used for Affine Transformation) + // [ eM11, eM12, eDx ] + // [ eM21, eM22, eDy ] + // [ 0, 0, 1 ] + // that consists of a linear map (eM11, eM12, eM21, eM22) + // More info: https://en.wikipedia.org/wiki/Linear_map + // followed by a translation (eDx, eDy) + + struct XForm + { + float eM11; // M1,1 value in the matrix. Increases or decreases the size of the pixels horizontally. + float eM12; // M1,2 value in the matrix. This effectively angles the X axis up or down. + float eM21; // M2,1 value in the matrix. This effectively angles the Y axis left or right. + float eM22; // M2,2 value in the matrix. Increases or decreases the size of the pixels vertically. + float eDx; // Delta x (Dx) value in the matrix. Moves the whole coordinate system horizontally. + float eDy; // Delta y (Dy) value in the matrix. Moves the whole coordinate system vertically. + XForm() + { + SetIdentity (); + } + + void SetIdentity () + { + eM11 = eM22 = 1.0f; + eDx = eDy = eM12 = eM21 = 0.0f; + } + + friend SvStream& ReadXForm( SvStream& rIn, XForm& rXForm ) + { + if ( sizeof( float ) != 4 ) + { + OSL_FAIL( "EnhWMFReader::sizeof( float ) != 4" ); + rXForm = XForm(); + } + else + { + rIn.ReadFloat( rXForm.eM11 ).ReadFloat( rXForm.eM12 ).ReadFloat( rXForm.eM21 ).ReadFloat( rXForm.eM22 ) + .ReadFloat( rXForm.eDx ).ReadFloat( rXForm.eDy ); + } + return rIn; + } + }; + + // EMF+ + + class ImplRenderer : public virtual Renderer, protected CanvasGraphicHelper + { + public: + ImplRenderer( const CanvasSharedPtr& rCanvas, + const GDIMetaFile& rMtf, + const Parameters& rParms ); + + virtual ~ImplRenderer() override; + + virtual bool draw() const override; + virtual bool drawSubset( sal_Int32 nStartIndex, + sal_Int32 nEndIndex ) const override; + virtual ::basegfx::B2DRange getSubsetArea( sal_Int32 nStartIndex, + sal_Int32 nEndIndex ) const override; + + + // element of the Renderer's action vector. Need to be + // public, since some functors need it, too. + struct MtfAction + { + MtfAction( std::shared_ptr<Action> xAction, + sal_Int32 nOrigIndex ) : + mpAction(std::move( xAction )), + mnOrigIndex( nOrigIndex ) + { + } + + std::shared_ptr<Action> mpAction; + sal_Int32 mnOrigIndex; + }; + + // prefetched and prepared canvas actions + // (externally not visible) + typedef std::vector< MtfAction > ActionVector; + + private: + ImplRenderer(const ImplRenderer&) = delete; + ImplRenderer& operator=( const ImplRenderer& ) = delete; + + static void updateClipping( const ::basegfx::B2DPolyPolygon& rClipPoly, + const ActionFactoryParameters& rParms, + bool bIntersect ); + + static void updateClipping( const ::tools::Rectangle& rClipRect, + const ActionFactoryParameters& rParms, + bool bIntersect ); + + static css::uno::Reference< + css::rendering::XCanvasFont > createFont( double& o_rFontRotation, + const vcl::Font& rFont, + const ActionFactoryParameters& rParms ); + void createActions( GDIMetaFile& rMtf, + const ActionFactoryParameters& rParms, + bool bSubsettableActions ); + bool createFillAndStroke( const ::basegfx::B2DPolyPolygon& rPolyPoly, + const ActionFactoryParameters& rParms ); + bool createFillAndStroke( const ::basegfx::B2DPolygon& rPoly, + const ActionFactoryParameters& rParms ); + static void skipContent( GDIMetaFile& rMtf, + const char* pCommentString, + sal_Int32& io_rCurrActionIndex ); + + static bool isActionContained( GDIMetaFile& rMtf, + const char* pCommentString, + MetaActionType nType ); + + void createGradientAction( const ::tools::PolyPolygon& rPoly, + const ::Gradient& rGradient, + const ActionFactoryParameters& rParms, + bool bIsPolygonRectangle, + bool bSubsettableActions ); + + void createTextAction( const ::Point& rStartPoint, + const OUString& rString, + int nIndex, + int nLength, + o3tl::span<const sal_Int32> pCharWidths, + const ActionFactoryParameters& rParms, + bool bSubsettable ); + + bool getSubsetIndices( sal_Int32& io_rStartIndex, + sal_Int32& io_rEndIndex, + ActionVector::const_iterator& o_rRangeBegin, + ActionVector::const_iterator& o_rRangeEnd ) const; + + ActionVector maActions; + + /* EMF+ */ + XForm aBaseTransform; + /* EMF+ emf header info */ + sal_Int32 nFrameLeft; + sal_Int32 nFrameTop; + sal_Int32 nFrameRight; + sal_Int32 nFrameBottom; + sal_Int32 nPixX; + sal_Int32 nPixY; + sal_Int32 nMmX; + sal_Int32 nMmY; + }; + + + /// Common parameters when creating actions + struct ActionFactoryParameters + { + ActionFactoryParameters( VectorOfOutDevStates& rStates, + const CanvasSharedPtr& rCanvas, + ::VirtualDevice& rVDev, + const Renderer::Parameters& rParms, + sal_Int32& io_rCurrActionIndex ) : + mrStates(rStates), + mrCanvas(rCanvas), + mrVDev(rVDev), + mrParms(rParms), + mrCurrActionIndex(io_rCurrActionIndex) + {} + + VectorOfOutDevStates& mrStates; + const CanvasSharedPtr& mrCanvas; + ::VirtualDevice& mrVDev; + const Renderer::Parameters& mrParms; + sal_Int32& mrCurrActionIndex; + }; + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |