summaryrefslogtreecommitdiff
path: root/vcl/source/outdev/polyline.cxx
blob: d0900c10da33c9b141fbaf60c0970882b76e7000 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
/* -*- 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 .
 */

#include <cassert>

#include <sal/types.h>

#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/polygon/b2dlinegeometry.hxx>
#include <vcl/gdimtf.hxx>
#include <vcl/metaact.hxx>
#include <vcl/outdev.hxx>
#include <vcl/virdev.hxx>

#include <salgdi.hxx>

void OutputDevice::DrawPolyLine( const tools::Polygon& rPoly )
{
    assert(!is_double_buffered_window());

    if( mpMetaFile )
        mpMetaFile->AddAction( new MetaPolyLineAction( rPoly ) );

    sal_uInt16 nPoints = rPoly.GetSize();

    if ( !IsDeviceOutputNecessary() || !mbLineColor || (nPoints < 2) || ImplIsRecordLayout() )
        return;

    // we need a graphics
    if ( !mpGraphics && !AcquireGraphics() )
        return;

    if ( mbInitClipRegion )
        InitClipRegion();

    if ( mbOutputClipped )
        return;

    if ( mbInitLineColor )
        InitLineColor();

    // use b2dpolygon drawing if possible
    if(DrawPolyLineDirectInternal(
        basegfx::B2DHomMatrix(),
        rPoly.getB2DPolygon()))
    {
        return;
    }

    const basegfx::B2DPolygon aB2DPolyLine(rPoly.getB2DPolygon());
    const basegfx::B2DHomMatrix aTransform(ImplGetDeviceTransformation());
    const bool bPixelSnapHairline(mnAntialiasing & AntialiasingFlags::PixelSnapHairline);

    if(mpGraphics->DrawPolyLine(
        aTransform,
        aB2DPolyLine,
        0.0,
        0.0, // tdf#124848 hairline
        nullptr, // MM01
        basegfx::B2DLineJoin::NONE,
        css::drawing::LineCap_BUTT,
        basegfx::deg2rad(15.0) /*default fMiterMinimumAngle, not used*/,
        bPixelSnapHairline,
        this))
    {
        return;
    }

    tools::Polygon aPoly = ImplLogicToDevicePixel( rPoly );
    SalPoint* pPtAry = reinterpret_cast<SalPoint*>(aPoly.GetPointAry());

    // #100127# Forward beziers to sal, if any
    if( aPoly.HasFlags() )
    {
        const PolyFlags* pFlgAry = aPoly.GetConstFlagAry();
        if( !mpGraphics->DrawPolyLineBezier( nPoints, pPtAry, pFlgAry, this ) )
        {
            aPoly = tools::Polygon::SubdivideBezier(aPoly);
            pPtAry = reinterpret_cast<SalPoint*>(aPoly.GetPointAry());
            mpGraphics->DrawPolyLine( aPoly.GetSize(), pPtAry, this );
        }
    }
    else
    {
        mpGraphics->DrawPolyLine( nPoints, pPtAry, this );
    }

    if( mpAlphaVDev )
        mpAlphaVDev->DrawPolyLine( rPoly );
}

void OutputDevice::DrawPolyLine( const tools::Polygon& rPoly, const LineInfo& rLineInfo )
{
    assert(!is_double_buffered_window());

    if ( rLineInfo.IsDefault() )
    {
        DrawPolyLine( rPoly );
        return;
    }

    // #i101491#
    // Try direct Fallback to B2D-Version of DrawPolyLine
    if(LineStyle::Solid == rLineInfo.GetStyle())
    {
        DrawPolyLine(
            rPoly.getB2DPolygon(),
            static_cast< double >(rLineInfo.GetWidth()),
            rLineInfo.GetLineJoin(),
            rLineInfo.GetLineCap(),
            basegfx::deg2rad(15.0) /* default fMiterMinimumAngle, value not available in LineInfo */);
        return;
    }

    if ( mpMetaFile )
        mpMetaFile->AddAction( new MetaPolyLineAction( rPoly, rLineInfo ) );

    drawPolyLine(rPoly, rLineInfo);
}

void OutputDevice::DrawPolyLine( const basegfx::B2DPolygon& rB2DPolygon,
                                 double fLineWidth,
                                 basegfx::B2DLineJoin eLineJoin,
                                 css::drawing::LineCap eLineCap,
                                 double fMiterMinimumAngle)
{
    assert(!is_double_buffered_window());

    if( mpMetaFile )
    {
        LineInfo aLineInfo;
        if( fLineWidth != 0.0 )
            aLineInfo.SetWidth( static_cast<tools::Long>(fLineWidth+0.5) );

        const tools::Polygon aToolsPolygon( rB2DPolygon );
        mpMetaFile->AddAction( new MetaPolyLineAction( aToolsPolygon, aLineInfo ) );
    }

    // Do not paint empty PolyPolygons
    if(!rB2DPolygon.count() || !IsDeviceOutputNecessary())
        return;

    // we need a graphics
    if( !mpGraphics && !AcquireGraphics() )
        return;

    if( mbInitClipRegion )
        InitClipRegion();

    if( mbOutputClipped )
        return;

    if( mbInitLineColor )
        InitLineColor();

    // use b2dpolygon drawing if possible
    if(DrawPolyLineDirectInternal(
        basegfx::B2DHomMatrix(),
        rB2DPolygon,
        fLineWidth,
        0.0,
        nullptr, // MM01
        eLineJoin,
        eLineCap,
        fMiterMinimumAngle))
    {
        return;
    }

    // #i101491#
    // no output yet; fallback to geometry decomposition and use filled polygon paint
    // when line is fat and not too complex. ImplDrawPolyPolygonWithB2DPolyPolygon
    // will do internal needed AA checks etc.
    if(fLineWidth >= 2.5 &&
       rB2DPolygon.count() &&
       rB2DPolygon.count() <= 1000)
    {
        const double fHalfLineWidth((fLineWidth * 0.5) + 0.5);
        const basegfx::B2DPolyPolygon aAreaPolyPolygon(
                basegfx::utils::createAreaGeometry( rB2DPolygon,
                                                    fHalfLineWidth,
                                                    eLineJoin,
                                                    eLineCap,
                                                    fMiterMinimumAngle));
        const Color aOldLineColor(maLineColor);
        const Color aOldFillColor(maFillColor);

        SetLineColor();
        InitLineColor();
        SetFillColor(aOldLineColor);
        InitFillColor();

        // draw using a loop; else the topology will paint a PolyPolygon
        for(auto const& rPolygon : aAreaPolyPolygon)
        {
            ImplDrawPolyPolygonWithB2DPolyPolygon(
                basegfx::B2DPolyPolygon(rPolygon));
        }

        SetLineColor(aOldLineColor);
        InitLineColor();
        SetFillColor(aOldFillColor);
        InitFillColor();

        // when AA it is necessary to also paint the filled polygon's outline
        // to avoid optical gaps
        for(auto const& rPolygon : aAreaPolyPolygon)
        {
            (void)DrawPolyLineDirectInternal(
                basegfx::B2DHomMatrix(),
                rPolygon);
        }
    }
    else
    {
        // fallback to old polygon drawing if needed
        const tools::Polygon aToolsPolygon( rB2DPolygon );
        LineInfo aLineInfo;
        if( fLineWidth != 0.0 )
            aLineInfo.SetWidth( static_cast<tools::Long>(fLineWidth+0.5) );

        drawPolyLine( aToolsPolygon, aLineInfo );
    }
}

void OutputDevice::drawPolyLine(const tools::Polygon& rPoly, const LineInfo& rLineInfo)
{
    sal_uInt16 nPoints(rPoly.GetSize());

    if ( !IsDeviceOutputNecessary() || !mbLineColor || ( nPoints < 2 ) || ( LineStyle::NONE == rLineInfo.GetStyle() ) || ImplIsRecordLayout() )
        return;

    tools::Polygon aPoly = ImplLogicToDevicePixel( rPoly );

    // we need a graphics
    if ( !mpGraphics && !AcquireGraphics() )
        return;

    if ( mbInitClipRegion )
        InitClipRegion();

    if ( mbOutputClipped )
        return;

    if ( mbInitLineColor )
        InitLineColor();

    const LineInfo aInfo( ImplLogicToDevicePixel( rLineInfo ) );
    const bool bDashUsed(LineStyle::Dash == aInfo.GetStyle());
    const bool bLineWidthUsed(aInfo.GetWidth() > 1);

    if(bDashUsed || bLineWidthUsed)
    {
        drawLine ( basegfx::B2DPolyPolygon(aPoly.getB2DPolygon()), aInfo );
    }
    else
    {
        // #100127# the subdivision HAS to be done here since only a pointer
        // to an array of points is given to the DrawPolyLine method, there is
        // NO way to find out there that it's a curve.
        if( aPoly.HasFlags() )
        {
            aPoly = tools::Polygon::SubdivideBezier( aPoly );
            nPoints = aPoly.GetSize();
        }

        mpGraphics->DrawPolyLine(nPoints, reinterpret_cast<SalPoint*>(aPoly.GetPointAry()), this);
    }

    if( mpAlphaVDev )
        mpAlphaVDev->DrawPolyLine( rPoly, rLineInfo );
}

bool OutputDevice::DrawPolyLineDirect(
    const basegfx::B2DHomMatrix& rObjectTransform,
    const basegfx::B2DPolygon& rB2DPolygon,
    double fLineWidth,
    double fTransparency,
    const std::vector< double >* pStroke, // MM01
    basegfx::B2DLineJoin eLineJoin,
    css::drawing::LineCap eLineCap,
    double fMiterMinimumAngle)
{
    if(DrawPolyLineDirectInternal(rObjectTransform, rB2DPolygon, fLineWidth, fTransparency,
        pStroke, eLineJoin, eLineCap, fMiterMinimumAngle))
    {
        // Worked, add metafile action (if recorded). This is done only here,
        // because this function is public, other OutDev functions already add metafile
        // actions, so they call the internal function directly.
        if( mpMetaFile )
        {
            LineInfo aLineInfo;
            if( fLineWidth != 0.0 )
                aLineInfo.SetWidth( static_cast<tools::Long>(fLineWidth+0.5) );
            // Transport known information, might be needed
            aLineInfo.SetLineJoin(eLineJoin);
            aLineInfo.SetLineCap(eLineCap);
            // MiterMinimumAngle does not exist yet in LineInfo
            const tools::Polygon aToolsPolygon( rB2DPolygon );
            mpMetaFile->AddAction( new MetaPolyLineAction( aToolsPolygon, aLineInfo ) );
        }
        return true;
    }
    return false;
}

bool OutputDevice::DrawPolyLineDirectInternal(
    const basegfx::B2DHomMatrix& rObjectTransform,
    const basegfx::B2DPolygon& rB2DPolygon,
    double fLineWidth,
    double fTransparency,
    const std::vector< double >* pStroke, // MM01
    basegfx::B2DLineJoin eLineJoin,
    css::drawing::LineCap eLineCap,
    double fMiterMinimumAngle)
{
    assert(!is_double_buffered_window());

    // AW: Do NOT paint empty PolyPolygons
    if(!rB2DPolygon.count())
        return true;

    // we need a graphics
    if( !mpGraphics && !AcquireGraphics() )
        return false;

    if( mbInitClipRegion )
        InitClipRegion();

    if( mbOutputClipped )
        return true;

    if( mbInitLineColor )
        InitLineColor();

    const bool bTryB2d(mpGraphics->supportsOperation(OutDevSupportType::B2DDraw) &&
                      RasterOp::OverPaint == GetRasterOp() &&
                      IsLineColor());

    if(bTryB2d)
    {
        // combine rObjectTransform with WorldToDevice
        const basegfx::B2DHomMatrix aTransform(ImplGetDeviceTransformation() * rObjectTransform);
        const bool bPixelSnapHairline((mnAntialiasing & AntialiasingFlags::PixelSnapHairline) && rB2DPolygon.count() < 1000);

        const double fAdjustedTransparency = mpAlphaVDev ? 0 : fTransparency;
        // draw the polyline
        bool bDrawSuccess = mpGraphics->DrawPolyLine(
            aTransform,
            rB2DPolygon,
            fAdjustedTransparency,
            fLineWidth, // tdf#124848 use LineWidth direct, do not try to solve for zero-case (aka hairline)
            pStroke, // MM01
            eLineJoin,
            eLineCap,
            fMiterMinimumAngle,
            bPixelSnapHairline,
            this);

        if( bDrawSuccess )
        {
            if (mpAlphaVDev)
                mpAlphaVDev->DrawPolyLineDirect(rObjectTransform, rB2DPolygon, fLineWidth,
                                                fTransparency, pStroke, eLineJoin, eLineCap,
                                                fMiterMinimumAngle);

            return true;
        }
    }
    return false;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */