svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.symbology / org.gvsig.symbology.lib / org.gvsig.symbology.lib.impl / src / main / java / org / gvsig / svgsupport / DefaultSVGRenderer.java @ 43156
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1 | 43156 | jjdelcerro | package org.gvsig.svgsupport; |
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2 | |||
3 | import java.awt.Graphics2D; |
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4 | import java.awt.RenderingHints; |
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5 | import java.awt.geom.AffineTransform; |
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6 | import java.awt.geom.Rectangle2D; |
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7 | import java.io.File; |
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8 | import java.io.IOException; |
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9 | import java.net.URISyntaxException; |
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10 | import java.net.URL; |
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11 | import org.apache.batik.bridge.BridgeContext; |
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12 | import org.apache.batik.bridge.DocumentLoader; |
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13 | import org.apache.batik.bridge.GVTBuilder; |
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14 | import org.apache.batik.bridge.UserAgentAdapter; |
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15 | import org.apache.batik.bridge.ViewBox; |
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16 | import org.apache.batik.dom.svg.SVGOMDocument; |
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17 | import org.apache.batik.gvt.GraphicsNode; |
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18 | import org.apache.batik.gvt.renderer.StaticRenderer; |
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19 | import org.w3c.dom.Document; |
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20 | import org.w3c.dom.Element; |
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21 | |||
22 | public class DefaultSVGRenderer implements SVGRenderer { |
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23 | |||
24 | private final GVTBuilder gvtBuilder = new GVTBuilder(); |
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25 | private final UserAgentAdapter userAgent; |
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26 | private final DocumentLoader loader; |
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27 | private final StaticRenderer renderer = new StaticRenderer(); |
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28 | private GraphicsNode gvtRoot;
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29 | private final BridgeContext ctx; |
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30 | private Element elt; |
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31 | private URL source; |
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32 | |||
33 | private static RenderingHints defaultRenderingHints = null; |
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34 | |||
35 | public DefaultSVGRenderer() {
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36 | userAgent = new UserAgentAdapter();
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37 | loader = new DocumentLoader(userAgent);
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38 | ctx = new BridgeContext(userAgent, loader);
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39 | renderer.setDoubleBuffered(true);
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40 | } |
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41 | |||
42 | @Override
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43 | public Rectangle2D getBounds() { |
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44 | Rectangle2D bounds = gvtRoot.getBounds();
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45 | return bounds;
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46 | } |
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47 | |||
48 | @Override
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49 | public void drawInsideRectangle(Graphics2D g, |
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50 | Rectangle2D rect,
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51 | boolean keepAspectRatio) {
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52 | if (keepAspectRatio) {
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53 | AffineTransform ataux = null; |
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54 | if (elt.hasAttribute("viewBox")) { |
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55 | |||
56 | try {
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57 | ataux |
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58 | = ViewBox.getViewTransform(null,
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59 | elt, |
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60 | (float) rect.getWidth(),
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61 | (float) rect.getHeight(),
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62 | ctx); |
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63 | } catch (NullPointerException e) { |
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64 | |||
65 | } |
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66 | } |
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67 | if( ataux == null ) { |
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68 | Rectangle2D bounds = gvtRoot.getBounds();
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69 | |||
70 | ataux = getNoRotationTransform( |
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71 | bounds, |
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72 | new Rectangle2D.Double( |
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73 | rect.getX(), |
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74 | rect.getY(), |
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75 | rect.getWidth(), |
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76 | rect.getHeight()), |
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77 | true
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78 | ); |
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79 | } |
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80 | RenderingHints renderingHints = new RenderingHints(null); |
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81 | renderingHints.putAll(getDefaultRenderingHints()); |
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82 | g.setRenderingHints(renderingHints); |
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83 | gvtRoot.setTransform(ataux); |
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84 | gvtRoot.paint(g); |
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85 | |||
86 | } else {
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87 | |||
88 | Rectangle2D bounds = gvtRoot.getBounds();
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89 | AffineTransform ataux = getNoRotationTransform(
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90 | bounds, |
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91 | new Rectangle2D.Double( |
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92 | rect.getX(), |
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93 | rect.getY(), |
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94 | rect.getWidth(), |
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95 | rect.getHeight() |
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96 | ), |
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97 | false
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98 | ); |
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99 | |||
100 | RenderingHints renderingHints = new RenderingHints(null); |
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101 | renderingHints.putAll(getDefaultRenderingHints()); |
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102 | g.setRenderingHints(renderingHints); |
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103 | gvtRoot.setTransform(ataux); |
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104 | gvtRoot.paint(g); |
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105 | } |
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106 | } |
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107 | |||
108 | @Override
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109 | public void setSource(URL url) throws IOException { |
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110 | |||
111 | source = url; |
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112 | Document svgDoc;
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113 | try {
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114 | svgDoc = loader.loadDocument(url.toURI().toString()); |
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115 | } catch (URISyntaxException e) { |
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116 | throw new IOException(e); |
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117 | } |
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118 | gvtRoot = gvtBuilder.build(ctx, svgDoc); |
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119 | renderer.setTree(gvtRoot); |
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120 | elt = ((SVGOMDocument) svgDoc).getRootElement(); |
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121 | } |
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122 | |||
123 | |||
124 | @Override
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125 | public URL getSource() { |
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126 | return this.source; |
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127 | } |
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128 | |||
129 | private AffineTransform getNoRotationTransform( |
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130 | Rectangle2D from_rect,
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131 | Rectangle2D to_rect,
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132 | boolean keep_aspect) {
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133 | |||
134 | double scalex = to_rect.getWidth() / from_rect.getWidth();
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135 | double scaley = to_rect.getHeight() / from_rect.getHeight();
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136 | |||
137 | if (keep_aspect) {
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138 | // force min value for both
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139 | scalex = Math.min(scalex, scaley);
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140 | scaley = scalex; |
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141 | } |
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142 | |||
143 | double from_new_center_x = scalex * from_rect.getCenterX();
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144 | double from_new_center_y = scaley * from_rect.getCenterY();
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145 | |||
146 | double offx = to_rect.getCenterX() - from_new_center_x;
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147 | double offy = to_rect.getCenterY() - from_new_center_y;
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148 | |||
149 | AffineTransform resp
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150 | = AffineTransform.getTranslateInstance(offx, offy);
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151 | |||
152 | // this composition is equivalent to:
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153 | // first scale, then move
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154 | resp.concatenate( |
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155 | AffineTransform.getScaleInstance(scalex, scaley));
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156 | return resp;
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157 | } |
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158 | |||
159 | private RenderingHints getDefaultRenderingHints() { |
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160 | if (defaultRenderingHints == null) { |
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161 | defaultRenderingHints = new RenderingHints(null); |
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162 | defaultRenderingHints.put(RenderingHints.KEY_ANTIALIASING,
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163 | RenderingHints.VALUE_ANTIALIAS_ON);
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164 | |||
165 | defaultRenderingHints.put(RenderingHints.KEY_INTERPOLATION,
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166 | RenderingHints.VALUE_INTERPOLATION_BILINEAR);
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167 | } |
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168 | return defaultRenderingHints;
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169 | } |
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170 | |||
171 | @Override
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172 | public void setSource(File f) throws IOException { |
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173 | setSource(f.toURI().toURL()); |
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174 | } |
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175 | } |