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| -rw-r--r-- | cppcanvas/source/mtfrenderer/mtftools.hxx | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/cppcanvas/source/mtfrenderer/mtftools.hxx b/cppcanvas/source/mtfrenderer/mtftools.hxx new file mode 100644 index 000000000..13970a518 --- /dev/null +++ b/cppcanvas/source/mtfrenderer/mtftools.hxx @@ -0,0 +1,212 @@ +/* -*- 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 <action.hxx> +#include <cppcanvas/canvas.hxx> + + +class VirtualDevice; +class Size; + +namespace basegfx +{ + class B2DVector; + class B2DPoint; +} +namespace com::sun::star::rendering +{ + struct RenderState; +} + + +namespace cppcanvas +{ + namespace internal + { + struct OutDevState; + } + + namespace tools + { + /** Init render state from OutDevState + + This method initializes the given render state object, + sets up the transformation and the clip from the + OutDevState. + */ + void initRenderState( css::rendering::RenderState& renderState, + const ::cppcanvas::internal::OutDevState& outdevState ); + + /** Calc output offset relative to baseline + + The XCanvas API always renders text relative to its + baseline. This method calculates an offset in logical + coordinates, depending on the OutDevState's + textReferencePoint and the font currently set, to offset + the text from the baseline. + + @param outdevState + State to take textReferencePoint from + + @param rVDev + VDev to obtain font metrics from. + */ + ::Size getBaselineOffset( const ::cppcanvas::internal::OutDevState& outdevState, + const VirtualDevice& rVDev ); + + /** Construct a matrix that converts from logical to pixel + coordinate system. + + This method calculates a matrix that approximates the + VirtualDevice's LogicToPixel conversion (disregarding any + offset components, thus the 'linear' in the method name - + the returned matrix is guaranteed to be linear). + + @param o_rMatrix + This matrix will receive the calculated transform, and is + also returned from this method. + + @return the calculated transformation matrix. + */ + ::basegfx::B2DHomMatrix& calcLogic2PixelLinearTransform( ::basegfx::B2DHomMatrix& o_rMatrix, + const VirtualDevice& rVDev ); + + /** Construct a matrix that converts from logical to pixel + coordinate system. + + This method calculates a matrix that approximates the + VirtualDevice's LogicToPixel conversion. + + @param o_rMatrix + This matrix will receive the calculated transform, and is + also returned from this method. + + @return the calculated transformation matrix. + */ + ::basegfx::B2DHomMatrix& calcLogic2PixelAffineTransform( ::basegfx::B2DHomMatrix& o_rMatrix, + const VirtualDevice& rVDev ); + + /** This method modifies the clip, to cancel the given + transformation. + + As the clip is relative to the render state + transformation, offsetting or scaling the render state + must modify the clip, to keep it at the same position + relative to the primitive at hand + + @param o_rRenderState + Render state to change the clip in + + @param rOutdevState + Input state. Is used to retrieve the original clip from + + @param rOffset + The clip is offsetted by the negative of this value. + + @param pScaling + The clip is inversely scaled by this value (if given) + + @param pRotation + The clip is inversely rotated by this value (if given) + + @return true, if the clip has changed, false if not + */ + bool modifyClip( css::rendering::RenderState& o_rRenderState, + const struct ::cppcanvas::internal::OutDevState& rOutdevState, + const CanvasSharedPtr& rCanvas, + const ::basegfx::B2DPoint& rOffset, + const ::basegfx::B2DVector* pScaling, + const double* pRotation ); + + struct TextLineInfo + { + TextLineInfo( const double& rLineHeight, + const double& rOverlineHeight, + const double& rOverlineOffset, + const double& rUnderlineOffset, + const double& rStrikeoutOffset, + sal_Int8 nOverlineStyle, + sal_Int8 nUnderlineStyle, + sal_Int8 nStrikeoutStyle ) : + mnLineHeight( rLineHeight ), + mnOverlineHeight( rOverlineHeight ), + mnOverlineOffset( rOverlineOffset ), + mnUnderlineOffset( rUnderlineOffset ), + mnStrikeoutOffset( rStrikeoutOffset ), + mnOverlineStyle( nOverlineStyle ), + mnUnderlineStyle( nUnderlineStyle ), + mnStrikeoutStyle( nStrikeoutStyle ) + { + } + + double mnLineHeight; + double mnOverlineHeight; + double mnOverlineOffset; + double mnUnderlineOffset; + double mnStrikeoutOffset; + sal_Int8 mnOverlineStyle; + sal_Int8 mnUnderlineStyle; + sal_Int8 mnStrikeoutStyle; + }; + + /** Transform given bounds to device coordinate system. + */ + ::basegfx::B2DRange calcDevicePixelBounds( const ::basegfx::B2DRange& rBounds, + const css::rendering::ViewState& viewState, + const css::rendering::RenderState& renderState ); + + /** Generate text underline/strikeout info struct from OutDev + state. + */ + TextLineInfo createTextLineInfo( const ::VirtualDevice& rVDev, + const ::cppcanvas::internal::OutDevState& rState ); + + /** Create a poly-polygon representing the given combination + of overline, strikeout and underline. + + @param rStartOffset + Offset in X direction, where the underline starts + + @param rLineWidth + Width of the line of text to overline/strikeout/underline + + @param rTextLineInfo + Common info needed for overline/strikeout/underline generation + */ + ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const double& rStartOffset, + const double& rLineWidth, + const TextLineInfo& rTextLineInfo ); + + ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const ::basegfx::B2DPoint& rStartPos, + const double& rLineWidth, + const TextLineInfo& rTextLineInfo ); + + void createTextLinesPolyPolygon( const double& rStartOffset, + const double& rLineWidth, + const TextLineInfo& rTextLineInfo, + ::basegfx::B2DPolyPolygon& rOverlinePolyPoly, + ::basegfx::B2DPolyPolygon& rUnderlinePolyPoly, + ::basegfx::B2DPolyPolygon& rStrikeoutPolyPoly ); + + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |