1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.mappaint;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Dimension;
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7 | import java.awt.Graphics2D;
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8 | import java.awt.Point;
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9 | import java.awt.image.BufferedImage;
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10 | import java.io.File;
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11 | import java.io.IOException;
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12 | import java.util.Collection;
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13 | import java.util.HashMap;
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14 | import java.util.Map;
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15 | import java.util.Optional;
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16 |
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17 | import javax.imageio.ImageIO;
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18 |
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19 | import org.openstreetmap.josm.Main;
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20 | import org.openstreetmap.josm.data.Bounds;
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21 | import org.openstreetmap.josm.data.ProjectionBounds;
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22 | import org.openstreetmap.josm.data.osm.DataSet;
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23 | import org.openstreetmap.josm.data.osm.visitor.paint.PaintColors;
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24 | import org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer;
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25 | import org.openstreetmap.josm.data.preferences.sources.SourceEntry;
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26 | import org.openstreetmap.josm.data.preferences.sources.SourceType;
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27 | import org.openstreetmap.josm.data.projection.Projection;
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28 | import org.openstreetmap.josm.gui.NavigatableComponent;
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29 | import org.openstreetmap.josm.gui.mappaint.mapcss.MapCSSStyleSource;
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30 | import org.openstreetmap.josm.io.IllegalDataException;
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31 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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32 | import org.openstreetmap.josm.tools.Logging;
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33 |
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34 | /**
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35 | * Class to render osm data to a file.
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36 | * @since 12963
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37 | */
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38 | public class RenderingHelper {
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39 |
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40 | private final DataSet ds;
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41 | private final Bounds bounds;
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42 | private final ProjectionBounds projBounds;
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43 | private final double scale;
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44 | private final Collection<StyleData> styles;
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45 | private String outputFile;
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46 |
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47 | /**
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48 | * Data class to save style settings along with the corresponding style URL.
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49 | */
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50 | public static class StyleData {
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51 | public String styleUrl;
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52 | public Map<String, String> settings = new HashMap<>();
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53 | }
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54 |
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55 | /**
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56 | * Construct a new {@code RenderingHelper}.
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57 | * @param ds the dataset to render
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58 | * @param bounds the bounds of the are to render
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59 | * @param scale the scale to render at (east/north units per pixel)
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60 | * @param styles the styles to use for rendering
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61 | */
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62 | public RenderingHelper(DataSet ds, Bounds bounds, double scale, Collection<StyleData> styles) {
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63 | CheckParameterUtil.ensureParameterNotNull(ds, "ds");
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64 | CheckParameterUtil.ensureParameterNotNull(bounds, "bounds");
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65 | CheckParameterUtil.ensureParameterNotNull(styles, "styles");
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66 | this.ds = ds;
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67 | this.bounds = bounds;
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68 | this.scale = scale;
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69 | this.styles = styles;
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70 | Projection proj = Main.getProjection();
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71 | projBounds = new ProjectionBounds();
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72 | projBounds.extend(proj.latlon2eastNorth(bounds.getMin()));
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73 | projBounds.extend(proj.latlon2eastNorth(bounds.getMax()));
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74 | }
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75 |
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76 | /**
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77 | * Set the output file for rendering.
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78 | *
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79 | * Default is {@code out.png}.
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80 | * @param outputFile the output file for rendering
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81 | */
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82 | public void setOutputFile(String outputFile) {
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83 | this.outputFile = outputFile;
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84 | }
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85 |
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86 | Dimension getImageSize() {
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87 | double widthEn = projBounds.maxEast - projBounds.minEast;
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88 | double heightEn = projBounds.maxNorth - projBounds.minNorth;
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89 | int widthPx = (int) Math.round(widthEn / scale);
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90 | int heightPx = (int) Math.round(heightEn / scale);
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91 | return new Dimension(widthPx, heightPx);
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92 | }
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93 |
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94 | /**
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95 | * Invoke the renderer.
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96 | *
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97 | * @throws IOException in case of an IOException
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98 | * @throws IllegalDataException when illegal data is encountered (style has errors, etc.)
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99 | */
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100 | public void render() throws IOException, IllegalDataException {
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101 | // load the styles
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102 | MapCSSStyleSource.STYLE_SOURCE_LOCK.writeLock().lock();
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103 | try {
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104 | MapPaintStyles.getStyles().clear();
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105 | for (StyleData sd : styles) {
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106 | SourceEntry se = new SourceEntry(SourceType.MAP_PAINT_STYLE, sd.styleUrl,
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107 | "cliRenderingStyle", "cli rendering style '" + sd.styleUrl + "'", true /* active */);
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108 | StyleSource source = MapPaintStyles.addStyle(se);
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109 | if (!source.getErrors().isEmpty()) {
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110 | throw new IllegalDataException("Failed to load style file. Errors: " + source.getErrors());
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111 | }
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112 | for (String key : sd.settings.keySet()) {
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113 | StyleSetting.BooleanStyleSetting match = source.settings.stream()
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114 | .filter(s -> s instanceof StyleSetting.BooleanStyleSetting)
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115 | .map(s -> (StyleSetting.BooleanStyleSetting) s)
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116 | .filter(bs -> bs.prefKey.endsWith(":" + key))
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117 | .findFirst().orElse(null);
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118 | if (match == null) {
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119 | Logging.warn(tr("Style setting not found: ''{0}''", key));
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120 | } else {
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121 | boolean value = Boolean.parseBoolean(sd.settings.get(key));
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122 | Logging.trace("setting applied: ''{0}:{1}''", key, value);
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123 | match.setValue(value);
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124 | }
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125 | }
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126 | if (!sd.settings.isEmpty()) {
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127 | source.loadStyleSource(); // reload to apply settings
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128 | }
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129 | }
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130 | } finally {
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131 | MapCSSStyleSource.STYLE_SOURCE_LOCK.writeLock().unlock();
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132 | }
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133 |
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134 | Dimension imgDimPx = getImageSize();
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135 | NavigatableComponent nc = new NavigatableComponent() {
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136 | {
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137 | setBounds(0, 0, imgDimPx.width, imgDimPx.height);
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138 | updateLocationState();
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139 | }
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140 |
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141 | @Override
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142 | protected boolean isVisibleOnScreen() {
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143 | return true;
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144 | }
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145 |
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146 | @Override
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147 | public Point getLocationOnScreen() {
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148 | return new Point(0, 0);
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149 | }
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150 | };
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151 | nc.zoomTo(projBounds.getCenter(), scale);
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152 |
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153 | // render the data
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154 | BufferedImage image = new BufferedImage(imgDimPx.width, imgDimPx.height, BufferedImage.TYPE_INT_ARGB);
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155 | Graphics2D g = image.createGraphics();
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156 | g.setColor(PaintColors.getBackgroundColor());
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157 | g.fillRect(0, 0, imgDimPx.width, imgDimPx.height);
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158 | new StyledMapRenderer(g, nc, false).render(ds, false, bounds);
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159 |
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160 | // write to file
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161 | String output = Optional.ofNullable(outputFile).orElse("out.png");
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162 | ImageIO.write(image, "png", new File(output));
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163 | }
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164 |
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165 | }
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