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21 
22 // MARKER(update_precomp.py): autogen include statement, do not remove
23 #include "precompiled_drawinglayer.hxx"
24 
25 #include <drawinglayer/tools/converters.hxx>
26 #include <drawinglayer/geometry/viewinformation2d.hxx>
27 #include <drawinglayer/processor2d/vclpixelprocessor2d.hxx>
28 #include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx>
29 #include <basegfx/matrix/b2dhommatrixtools.hxx>
30 #include <drawinglayer/primitive2d/transformprimitive2d.hxx>
31 #include <vcl/virdev.hxx>
32 
33 #ifdef DBG_UTIL
34 #include <tools/stream.hxx>
35 #include <vcl/pngwrite.hxx>
36 #endif
37 
38 //////////////////////////////////////////////////////////////////////////////
39 
40 namespace drawinglayer
41 {
42     namespace tools
43     {
44         BitmapEx DRAWINGLAYER_DLLPUBLIC convertToBitmapEx(
45             const drawinglayer::primitive2d::Primitive2DSequence& rSeq,
46             const geometry::ViewInformation2D& rViewInformation2D,
47             sal_uInt32 nDiscreteWidth,
48             sal_uInt32 nDiscreteHeight,
49             sal_uInt32 nMaxQuadratPixels)
50         {
51             BitmapEx aRetval;
52 
53             if(rSeq.hasElements() && nDiscreteWidth && nDiscreteHeight)
54             {
55                 // get destination size in pixels
56                 const MapMode aMapModePixel(MAP_PIXEL);
57                 const sal_uInt32 nViewVisibleArea(nDiscreteWidth * nDiscreteHeight);
58                 double fReduceFactor(1.0);
59                 drawinglayer::primitive2d::Primitive2DSequence aSequence(rSeq);
60 
61                 if(nViewVisibleArea > nMaxQuadratPixels)
62                 {
63                     // reduce render size
64                     fReduceFactor = sqrt((double)nMaxQuadratPixels / (double)nViewVisibleArea);
65                     nDiscreteWidth = basegfx::fround((double)nDiscreteWidth * fReduceFactor);
66                     nDiscreteHeight = basegfx::fround((double)nDiscreteHeight * fReduceFactor);
67 
68                     const drawinglayer::primitive2d::Primitive2DReference aEmbed(
69                         new drawinglayer::primitive2d::TransformPrimitive2D(
70                             basegfx::tools::createScaleB2DHomMatrix(fReduceFactor, fReduceFactor),
71                             rSeq));
72 
73                     aSequence = drawinglayer::primitive2d::Primitive2DSequence(&aEmbed, 1);
74                 }
75 
76                 const Point aEmptyPoint;
77                 const Size aSizePixel(nDiscreteWidth, nDiscreteHeight);
78                 geometry::ViewInformation2D aViewInformation2D(rViewInformation2D);
79                 VirtualDevice maContent;
80 
81                 // prepare vdev
82                 maContent.SetOutputSizePixel(aSizePixel, false);
83                 maContent.SetMapMode(aMapModePixel);
84                 maContent.SetAntialiasing(true);
85 
86                 // set to all white
87                 maContent.SetBackground(Wallpaper(Color(COL_WHITE)));
88                 maContent.Erase();
89 
90                 // create processor
91                 processor2d::VclPixelProcessor2D aContentProcessor(aViewInformation2D, maContent);
92 
93                 // render content
94                 aContentProcessor.process(aSequence);
95 
96                 // get content
97                 maContent.EnableMapMode(false);
98                 const Bitmap aContent(maContent.GetBitmap(aEmptyPoint, aSizePixel));
99 
100                 // prepare for mask creation
101                 maContent.SetMapMode(aMapModePixel);
102                 maContent.SetAntialiasing(true);
103 
104                 // set alpha to all white (fully transparent)
105                 maContent.Erase();
106 
107                 // embed primitives to paint them black
108                 const primitive2d::Primitive2DReference xRef(
109                     new primitive2d::ModifiedColorPrimitive2D(
110                         aSequence,
111                         basegfx::BColorModifier(
112                             basegfx::BColor(0.0, 0.0, 0.0),
113                             0.5,
114                             basegfx::BCOLORMODIFYMODE_REPLACE)));
115                 const primitive2d::Primitive2DSequence xSeq(&xRef, 1);
116 
117                 // render
118                 aContentProcessor.process(xSeq);
119 
120                 // get alpha cahannel from vdev
121                 maContent.EnableMapMode(false);
122                 const AlphaMask aAlphaMask(maContent.GetBitmap(aEmptyPoint, aSizePixel));
123 
124                 // create BitmapEx result
125                 aRetval = BitmapEx(aContent, aAlphaMask);
126             }
127 
128 #ifdef DBG_UTIL
129             static bool bDoSaveForVisualControl(false);
130             if(bDoSaveForVisualControl)
131             {
132                 SvFileStream aNew((const String&)String(ByteString( "c:\\test.png" ), RTL_TEXTENCODING_UTF8), STREAM_WRITE|STREAM_TRUNC);
133                 ::vcl::PNGWriter aPNGWriter(aRetval);
134                 aPNGWriter.Write(aNew);
135             }
136 #endif
137 
138             return aRetval;
139         }
140 
141     } // end of namespace tools
142 } // end of namespace drawinglayer
143 
144 //////////////////////////////////////////////////////////////////////////////
145 // eof
146