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 java.awt.Graphics;
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5 | import java.awt.Image;
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6 | import java.awt.Rectangle;
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7 | import java.awt.image.BufferedImage;
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8 | import java.util.Objects;
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9 |
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10 | import javax.swing.ImageIcon;
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11 |
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12 | import org.openstreetmap.josm.Main;
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13 | import org.openstreetmap.josm.gui.mappaint.BoxTextElemStyle.BoxProvider;
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14 | import org.openstreetmap.josm.gui.mappaint.BoxTextElemStyle.BoxProviderResult;
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15 | import org.openstreetmap.josm.gui.util.GuiHelper;
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16 | import org.openstreetmap.josm.tools.ImageProvider;
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17 | import org.openstreetmap.josm.tools.ImageProvider.ImageCallback;
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18 | import org.openstreetmap.josm.tools.Utils;
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19 |
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20 | /**
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21 | * An image that will be displayed on the map.
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22 | */
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23 | public class MapImage {
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24 |
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25 | private static final int MAX_SIZE = 48;
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26 |
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27 | /**
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28 | * ImageIcon can change while the image is loading.
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29 | */
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30 | private BufferedImage img;
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31 |
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32 | public int alpha = 255;
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33 | public String name;
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34 | public StyleSource source;
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35 | public boolean autoRescale;
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36 | public int width = -1;
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37 | public int height = -1;
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38 | public int offsetX;
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39 | public int offsetY;
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40 |
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41 | private boolean temporary;
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42 | private BufferedImage disabledImgCache;
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43 |
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44 | public MapImage(String name, StyleSource source) {
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45 | this(name, source, true);
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46 | }
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47 |
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48 | public MapImage(String name, StyleSource source, boolean autoRescale) {
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49 | this.name = name;
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50 | this.source = source;
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51 | this.autoRescale = autoRescale;
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52 | }
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53 |
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54 | /**
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55 | * Get the image associated with this MapImage object.
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56 | *
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57 | * @param disabled {@code} true to request disabled version, {@code false} for the standard version
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58 | * @return the image
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59 | */
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60 | public BufferedImage getImage(boolean disabled) {
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61 | if (disabled) {
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62 | return getDisabled();
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63 | } else {
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64 | return getImage();
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65 | }
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66 | }
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67 |
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68 | private BufferedImage getDisabled() {
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69 | if (disabledImgCache != null)
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70 | return disabledImgCache;
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71 | if (img == null)
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72 | getImage(); // fix #7498 ?
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73 | Image disImg = GuiHelper.getDisabledImage(img);
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74 | if (disImg instanceof BufferedImage) {
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75 | disabledImgCache = (BufferedImage) disImg;
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76 | } else {
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77 | disabledImgCache = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);
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78 | Graphics g = disabledImgCache.getGraphics();
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79 | g.drawImage(disImg, 0, 0, null);
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80 | g.dispose();
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81 | }
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82 | return disabledImgCache;
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83 | }
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84 |
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85 | private BufferedImage getImage() {
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86 | if (img != null)
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87 | return img;
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88 | temporary = false;
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89 | new ImageProvider(name)
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90 | .setDirs(MapPaintStyles.getIconSourceDirs(source))
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91 | .setId("mappaint."+source.getPrefName())
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92 | .setArchive(source.zipIcons)
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93 | .setInArchiveDir(source.getZipEntryDirName())
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94 | .setWidth(width)
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95 | .setHeight(height)
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96 | .setOptional(true)
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97 | .getInBackground(new ImageCallback() {
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98 | @Override
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99 | public void finished(ImageIcon result) {
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100 | synchronized (MapImage.this) {
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101 | if (result == null) {
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102 | ImageIcon noIcon = MapPaintStyles.getNoIcon_Icon(source);
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103 | img = noIcon == null ? null : (BufferedImage) noIcon.getImage();
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104 | } else {
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105 | img = (BufferedImage) rescale(result.getImage());
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106 | }
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107 | if (temporary) {
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108 | disabledImgCache = null;
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109 | Main.map.mapView.preferenceChanged(null); // otherwise repaint is ignored, because layer hasn't changed
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110 | Main.map.mapView.repaint();
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111 | }
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112 | temporary = false;
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113 | }
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114 | }
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115 | }
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116 | );
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117 | synchronized (this) {
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118 | if (img == null) {
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119 | img = (BufferedImage) ImageProvider.get("clock").getImage();
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120 | temporary = true;
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121 | }
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122 | }
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123 | return img;
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124 | }
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125 |
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126 | public int getWidth() {
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127 | return getImage().getWidth(null);
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128 | }
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129 |
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130 | public int getHeight() {
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131 | return getImage().getHeight(null);
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132 | }
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133 |
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134 | public float getAlphaFloat() {
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135 | return Utils.color_int2float(alpha);
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136 | }
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137 |
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138 | /**
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139 | * Determines if image is not completely loaded and {@code getImage()} returns a temporary image.
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140 | * @return {@code true} if image is not completely loaded and getImage() returns a temporary image
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141 | */
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142 | public boolean isTemporary() {
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143 | return temporary;
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144 | }
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145 |
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146 | protected class MapImageBoxProvider implements BoxProvider {
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147 | @Override
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148 | public BoxProviderResult get() {
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149 | return new BoxProviderResult(box(), temporary);
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150 | }
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151 |
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152 | private Rectangle box() {
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153 | int w = getWidth(), h = getHeight();
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154 | if (mustRescale(getImage())) {
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155 | w = 16;
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156 | h = 16;
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157 | }
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158 | return new Rectangle(-w/2, -h/2, w, h);
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159 | }
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160 |
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161 | private MapImage getParent() {
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162 | return MapImage.this;
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163 | }
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164 |
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165 | @Override
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166 | public int hashCode() {
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167 | return MapImage.this.hashCode();
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168 | }
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169 |
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170 | @Override
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171 | public boolean equals(Object obj) {
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172 | if (!(obj instanceof BoxProvider))
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173 | return false;
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174 | if (obj instanceof MapImageBoxProvider) {
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175 | MapImageBoxProvider other = (MapImageBoxProvider) obj;
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176 | return MapImage.this.equals(other.getParent());
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177 | } else if (temporary) {
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178 | return false;
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179 | } else {
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180 | final BoxProvider other = (BoxProvider) obj;
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181 | BoxProviderResult resultOther = other.get();
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182 | if (resultOther.isTemporary()) return false;
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183 | return box().equals(resultOther.getBox());
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184 | }
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185 | }
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186 | }
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187 |
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188 | public BoxProvider getBoxProvider() {
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189 | return new MapImageBoxProvider();
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190 | }
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191 |
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192 | /**
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193 | * Rescale excessively large images.
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194 | * @param image the unscaled image
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195 | * @return The scaled down version to 16x16 pixels if the image height and width exceeds 48 pixels and no size has been explicitely specified
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196 | */
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197 | private Image rescale(Image image) {
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198 | if (image == null) return null;
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199 | // Scale down large (.svg) images to 16x16 pixels if no size is explicitely specified
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200 | if (mustRescale(image)) {
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201 | return ImageProvider.createBoundedImage(image, 16);
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202 | } else {
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203 | return image;
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204 | }
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205 | }
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206 |
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207 | private boolean mustRescale(Image image) {
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208 | return autoRescale && width == -1 && image.getWidth(null) > MAX_SIZE
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209 | && height == -1 && image.getHeight(null) > MAX_SIZE;
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210 | }
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211 |
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212 | @Override
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213 | public boolean equals(Object obj) {
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214 | if (obj == null || getClass() != obj.getClass())
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215 | return false;
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216 | final MapImage other = (MapImage) obj;
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217 | // img changes when image is fully loaded and can't be used for equality check.
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218 | return alpha == other.alpha &&
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219 | Objects.equals(name, other.name) &&
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220 | Objects.equals(source, other.source) &&
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221 | autoRescale == other.autoRescale &&
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222 | width == other.width &&
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223 | height == other.height;
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224 | }
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225 |
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226 | @Override
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227 | public int hashCode() {
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228 | int hash = 7;
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229 | hash = 67 * hash + alpha;
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230 | hash = 67 * hash + name.hashCode();
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231 | hash = 67 * hash + source.hashCode();
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232 | hash = 67 * hash + (autoRescale ? 1 : 0);
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233 | hash = 67 * hash + width;
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234 | hash = 67 * hash + height;
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235 | return hash;
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236 | }
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237 |
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238 | @Override
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239 | public String toString() {
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240 | return name;
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241 | }
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242 | }
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