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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef _CPPCANVAS_RENDERER_MTFTOOLS_HXX
21 : #define _CPPCANVAS_RENDERER_MTFTOOLS_HXX
22 :
23 : #include <action.hxx>
24 : #include <cppcanvas/canvas.hxx>
25 :
26 :
27 : class VirtualDevice;
28 : class Size;
29 :
30 : namespace basegfx
31 : {
32 : class B2DVector;
33 : class B2DPoint;
34 : }
35 : namespace com { namespace sun { namespace star { namespace rendering
36 : {
37 : struct RenderState;
38 : } } } }
39 :
40 :
41 : namespace cppcanvas
42 : {
43 : namespace internal
44 : {
45 : struct OutDevState;
46 : }
47 :
48 : namespace tools
49 : {
50 : /** Init render state from OutDevState
51 :
52 : This method initializes the given render state object,
53 : sets up the transformation and the clip from the
54 : OutDevState.
55 : */
56 : void initRenderState( ::com::sun::star::rendering::RenderState& renderState,
57 : const ::cppcanvas::internal::OutDevState& outdevState );
58 :
59 : /** Calc output offset relative to baseline
60 :
61 : The XCanvas API always renders text relative to its
62 : baseline. This method calculates an offset in logical
63 : coordinates, depending on the OutDevState's
64 : textReferencePoint and the font currently set, to offset
65 : the text from the baseline.
66 :
67 : @param outdevState
68 : State to take textReferencePoint from
69 :
70 : @param rVDev
71 : VDev to obtain font metrics from.
72 : */
73 : ::Size getBaselineOffset( const ::cppcanvas::internal::OutDevState& outdevState,
74 : const VirtualDevice& rVDev );
75 :
76 : /** Construct a matrix that converts from logical to pixel
77 : coordinate system.
78 :
79 : This method calculates a matrix that approximates the
80 : VirtualDevice's LogicToPixel conversion (disregarding any
81 : offset components, thus the 'linear' in the method name -
82 : the returned matrix is guaranteed to be linear).
83 :
84 : @param o_rMatrix
85 : This matrix will receive the calculated transform, and is
86 : also returned from this method.
87 :
88 : @return the calculated transformation matrix.
89 : */
90 : ::basegfx::B2DHomMatrix& calcLogic2PixelLinearTransform( ::basegfx::B2DHomMatrix& o_rMatrix,
91 : const VirtualDevice& rVDev );
92 :
93 : /** Construct a matrix that converts from logical to pixel
94 : coordinate system.
95 :
96 : This method calculates a matrix that approximates the
97 : VirtualDevice's LogicToPixel conversion.
98 :
99 : @param o_rMatrix
100 : This matrix will receive the calculated transform, and is
101 : also returned from this method.
102 :
103 : @return the calculated transformation matrix.
104 : */
105 : ::basegfx::B2DHomMatrix& calcLogic2PixelAffineTransform( ::basegfx::B2DHomMatrix& o_rMatrix,
106 : const VirtualDevice& rVDev );
107 :
108 : /** This method modifies the clip, to cancel the given
109 : transformation.
110 :
111 : As the clip is relative to the render state
112 : transformation, offsetting or scaling the render state
113 : must modify the clip, to keep it at the same position
114 : relative to the primitive at hand
115 :
116 : @param o_rRenderState
117 : Render state to change the clip in
118 :
119 : @param rOutdevState
120 : Input state. Is used to retrieve the original clip from
121 :
122 : @param rOffset
123 : The clip is offsetted by the negative of this value.
124 :
125 : @param pScaling
126 : The clip is inversely scaled by this value (if given)
127 :
128 : @param pRotation
129 : The clip is inversely rotated by this value (if given)
130 :
131 : @return true, if the clip has changed, false if not
132 : */
133 : bool modifyClip( ::com::sun::star::rendering::RenderState& o_rRenderState,
134 : const struct ::cppcanvas::internal::OutDevState& rOutdevState,
135 : const CanvasSharedPtr& rCanvas,
136 : const ::basegfx::B2DPoint& rOffset,
137 : const ::basegfx::B2DVector* pScaling,
138 : const double* pRotation );
139 :
140 : struct TextLineInfo
141 : {
142 0 : TextLineInfo( const double& rLineHeight,
143 : const double& rOverlineHeight,
144 : const double& rOverlineOffset,
145 : const double& rUnderlineOffset,
146 : const double& rStrikeoutOffset,
147 : sal_Int8 nOverlineStyle,
148 : sal_Int8 nUnderlineStyle,
149 : sal_Int8 nStrikeoutStyle ) :
150 : mnLineHeight( rLineHeight ),
151 : mnOverlineHeight( rOverlineHeight ),
152 : mnOverlineOffset( rOverlineOffset ),
153 : mnUnderlineOffset( rUnderlineOffset ),
154 : mnStrikeoutOffset( rStrikeoutOffset ),
155 : mnOverlineStyle( nOverlineStyle ),
156 : mnUnderlineStyle( nUnderlineStyle ),
157 0 : mnStrikeoutStyle( nStrikeoutStyle )
158 : {
159 0 : }
160 :
161 : double mnLineHeight;
162 : double mnOverlineHeight;
163 : double mnOverlineOffset;
164 : double mnUnderlineOffset;
165 : double mnStrikeoutOffset;
166 : sal_Int8 mnOverlineStyle;
167 : sal_Int8 mnUnderlineStyle;
168 : sal_Int8 mnStrikeoutStyle;
169 : };
170 :
171 : /** Transform given bounds to device coordinate system.
172 : */
173 : ::basegfx::B2DRange calcDevicePixelBounds( const ::basegfx::B2DRange& rBounds,
174 : const ::com::sun::star::rendering::ViewState& viewState,
175 : const ::com::sun::star::rendering::RenderState& renderState );
176 :
177 : /** Generate text underline/strikeout info struct from OutDev
178 : state.
179 : */
180 : TextLineInfo createTextLineInfo( const ::VirtualDevice& rVDev,
181 : const ::cppcanvas::internal::OutDevState& rState );
182 :
183 : /** Create a poly-polygon representing the given combination
184 : of overline, strikeout and underline.
185 :
186 : @param rStartOffset
187 : Offset in X direction, where the underline starts
188 :
189 : @param rLineWidth
190 : Width of the line of text to overline/strikeout/underline
191 :
192 : @param rTextLineInfo
193 : Common info needed for overline/strikeout/underline generation
194 : */
195 : ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const double& rStartOffset,
196 : const double& rLineWidth,
197 : const TextLineInfo& rTextLineInfo );
198 :
199 : ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const ::basegfx::B2DPoint rStartPos,
200 : const double& rLineWidth,
201 : const TextLineInfo& rTextLineInfo );
202 : }
203 : }
204 :
205 : #endif /* _CPPCANVAS_RENDERER_MTFTOOLS_HXX */
206 :
207 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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