Line data Source code
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 : #include <drawinglayer/tools/converters.hxx>
21 : #include <drawinglayer/geometry/viewinformation2d.hxx>
22 : #include <drawinglayer/processor2d/vclpixelprocessor2d.hxx>
23 : #include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx>
24 : #include <basegfx/matrix/b2dhommatrixtools.hxx>
25 : #include <drawinglayer/primitive2d/transformprimitive2d.hxx>
26 : #include <vcl/virdev.hxx>
27 :
28 : #ifdef DBG_UTIL
29 : #include <tools/stream.hxx>
30 : #endif
31 :
32 : //////////////////////////////////////////////////////////////////////////////
33 :
34 : namespace drawinglayer
35 : {
36 : namespace tools
37 : {
38 0 : BitmapEx DRAWINGLAYER_DLLPUBLIC convertToBitmapEx(
39 : const drawinglayer::primitive2d::Primitive2DSequence& rSeq,
40 : const geometry::ViewInformation2D& rViewInformation2D,
41 : sal_uInt32 nDiscreteWidth,
42 : sal_uInt32 nDiscreteHeight,
43 : sal_uInt32 nMaxQuadratPixels)
44 : {
45 0 : BitmapEx aRetval;
46 :
47 0 : if(rSeq.hasElements() && nDiscreteWidth && nDiscreteHeight)
48 : {
49 : // get destination size in pixels
50 0 : const MapMode aMapModePixel(MAP_PIXEL);
51 0 : const sal_uInt32 nViewVisibleArea(nDiscreteWidth * nDiscreteHeight);
52 0 : double fReduceFactor(1.0);
53 0 : drawinglayer::primitive2d::Primitive2DSequence aSequence(rSeq);
54 :
55 0 : if(nViewVisibleArea > nMaxQuadratPixels)
56 : {
57 : // reduce render size
58 0 : fReduceFactor = sqrt((double)nMaxQuadratPixels / (double)nViewVisibleArea);
59 0 : nDiscreteWidth = basegfx::fround((double)nDiscreteWidth * fReduceFactor);
60 0 : nDiscreteHeight = basegfx::fround((double)nDiscreteHeight * fReduceFactor);
61 :
62 : const drawinglayer::primitive2d::Primitive2DReference aEmbed(
63 : new drawinglayer::primitive2d::TransformPrimitive2D(
64 : basegfx::tools::createScaleB2DHomMatrix(fReduceFactor, fReduceFactor),
65 0 : rSeq));
66 :
67 0 : aSequence = drawinglayer::primitive2d::Primitive2DSequence(&aEmbed, 1);
68 : }
69 :
70 0 : const Point aEmptyPoint;
71 0 : const Size aSizePixel(nDiscreteWidth, nDiscreteHeight);
72 0 : geometry::ViewInformation2D aViewInformation2D(rViewInformation2D);
73 0 : VirtualDevice maContent;
74 :
75 : // prepare vdev
76 0 : maContent.SetOutputSizePixel(aSizePixel, false);
77 0 : maContent.SetMapMode(aMapModePixel);
78 0 : maContent.SetAntialiasing(true);
79 :
80 : // set to all white
81 0 : maContent.SetBackground(Wallpaper(Color(COL_WHITE)));
82 0 : maContent.Erase();
83 :
84 : // create processor
85 0 : processor2d::VclPixelProcessor2D aContentProcessor(aViewInformation2D, maContent);
86 :
87 : // render content
88 0 : aContentProcessor.process(aSequence);
89 :
90 : // get content
91 0 : maContent.EnableMapMode(false);
92 0 : const Bitmap aContent(maContent.GetBitmap(aEmptyPoint, aSizePixel));
93 :
94 : // prepare for mask creation
95 0 : maContent.SetMapMode(aMapModePixel);
96 0 : maContent.SetAntialiasing(true);
97 :
98 : // set alpha to all white (fully transparent)
99 0 : maContent.Erase();
100 :
101 : // embed primitives to paint them black
102 : const primitive2d::Primitive2DReference xRef(
103 : new primitive2d::ModifiedColorPrimitive2D(
104 : aSequence,
105 : basegfx::BColorModifier(
106 : basegfx::BColor(0.0, 0.0, 0.0),
107 : 0.5,
108 0 : basegfx::BCOLORMODIFYMODE_REPLACE)));
109 0 : const primitive2d::Primitive2DSequence xSeq(&xRef, 1);
110 :
111 : // render
112 0 : aContentProcessor.process(xSeq);
113 :
114 : // get alpha cahannel from vdev
115 0 : maContent.EnableMapMode(false);
116 0 : const AlphaMask aAlphaMask(maContent.GetBitmap(aEmptyPoint, aSizePixel));
117 :
118 : // create BitmapEx result
119 0 : aRetval = BitmapEx(aContent, aAlphaMask);
120 : }
121 :
122 : #ifdef DBG_UTIL
123 : static bool bDoSaveForVisualControl(false);
124 : if(bDoSaveForVisualControl)
125 : {
126 : SvFileStream aNew(rtl::OUString("c:\\test.png"), STREAM_WRITE|STREAM_TRUNC);
127 : aNew << aRetval;
128 : }
129 : #endif
130 :
131 0 : return aRetval;
132 : }
133 :
134 : } // end of namespace tools
135 : } // end of namespace drawinglayer
136 :
137 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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