1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools;
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3 |
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4 | import java.awt.Dimension;
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5 | import java.awt.Image;
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6 | import java.awt.image.BufferedImage;
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7 | import java.io.IOException;
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8 | import java.io.UncheckedIOException;
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9 | import java.util.List;
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10 | import java.util.Locale;
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11 | import java.util.Objects;
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12 | import java.util.function.Supplier;
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13 |
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14 | import javax.swing.AbstractAction;
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15 | import javax.swing.Action;
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16 | import javax.swing.Icon;
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17 | import javax.swing.ImageIcon;
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18 | import javax.swing.JPanel;
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19 | import javax.swing.UIManager;
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20 |
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21 | import org.apache.commons.jcs3.access.behavior.ICacheAccess;
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22 | import org.openstreetmap.josm.data.cache.BufferedImageCacheEntry;
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23 | import org.openstreetmap.josm.data.cache.JCSCacheManager;
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24 |
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25 | import com.kitfox.svg.SVGDiagram;
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26 |
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27 | /**
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28 | * Holds data for one particular image.
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29 | * It can be backed by a svg or raster image.
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30 | *
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31 | * In the first case, <code>svg</code> is not <code>null</code> and in the latter case,
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32 | * <code>baseImage</code> is not <code>null</code>.
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33 | * @since 4271
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34 | */
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35 | public class ImageResource {
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36 |
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37 | /**
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38 | * Caches the image data for resized versions of the same image.
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39 | * Depending on {@link JCSCacheManager#USE_IMAGE_RESOURCE_CACHE}, a combined memory/disk, or an in-memory-cache is used.
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40 | */
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41 | private static final ICacheAccess<String, BufferedImageCacheEntry> imgCache = JCSCacheManager.getImageResourceCache();
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42 |
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43 | private final String cacheKey;
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44 | /**
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45 | * SVG diagram information in case of SVG vector image.
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46 | */
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47 | private SVGDiagram svg;
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48 | /**
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49 | * Supplier for SVG diagram information in case of possibly cached SVG vector image.
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50 | */
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51 | private Supplier<SVGDiagram> svgSupplier;
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52 | /**
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53 | * Use this dimension to request original file dimension.
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54 | */
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55 | public static final Dimension DEFAULT_DIMENSION = new Dimension(-1, -1);
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56 | /**
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57 | * ordered list of overlay images
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58 | */
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59 | protected List<ImageOverlay> overlayInfo;
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60 | /**
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61 | * <code>true</code> if icon must be grayed out
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62 | */
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63 | protected boolean isDisabled;
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64 | /**
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65 | * The base raster image for the final output
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66 | */
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67 | private Image baseImage;
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68 |
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69 | /**
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70 | * Constructs a new {@code ImageResource} from an image.
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71 | * @param cacheKey the caching identifier of the image
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72 | * @param img the image
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73 | */
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74 | public ImageResource(String cacheKey, Image img) {
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75 | this.cacheKey = Objects.requireNonNull(cacheKey);
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76 | this.baseImage = Objects.requireNonNull(img);
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77 | }
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78 |
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79 | /**
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80 | * Constructs a new {@code ImageResource} from SVG data.
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81 | * @param cacheKey the caching identifier of the image
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82 | * @param svg SVG data
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83 | */
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84 | public ImageResource(String cacheKey, SVGDiagram svg) {
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85 | this.cacheKey = Objects.requireNonNull(cacheKey);
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86 | this.svg = Objects.requireNonNull(svg);
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87 | }
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88 |
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89 | public ImageResource(String cacheKey, Supplier<SVGDiagram> svgSupplier) {
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90 | this.cacheKey = Objects.requireNonNull(cacheKey);
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91 | this.svgSupplier = Objects.requireNonNull(svgSupplier);
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92 | }
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93 |
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94 | /**
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95 | * Constructs a new {@code ImageResource} from another one and sets overlays.
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96 | * @param res the existing resource
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97 | * @param overlayInfo the overlay to apply
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98 | * @since 8095
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99 | */
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100 | public ImageResource(ImageResource res, List<ImageOverlay> overlayInfo) {
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101 | this.cacheKey = res.cacheKey;
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102 | this.svg = res.svg;
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103 | this.svgSupplier = res.svgSupplier;
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104 | this.baseImage = res.baseImage;
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105 | this.overlayInfo = overlayInfo;
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106 | }
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107 |
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108 | /**
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109 | * Set, if image must be filtered to grayscale so it will look like disabled icon.
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110 | *
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111 | * @param disabled true, if image must be grayed out for disabled state
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112 | * @return the current object, for convenience
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113 | * @since 10428
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114 | */
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115 | public ImageResource setDisabled(boolean disabled) {
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116 | this.isDisabled = disabled;
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117 | return this;
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118 | }
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119 |
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120 | /**
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121 | * Set both icons of an Action
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122 | * @param a The action for the icons
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123 | * @since 10369
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124 | */
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125 | public void attachImageIcon(AbstractAction a) {
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126 | Dimension iconDimension = ImageProvider.ImageSizes.SMALLICON.getImageDimension();
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127 | ImageIcon icon = getImageIcon(iconDimension);
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128 | a.putValue(Action.SMALL_ICON, icon);
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129 |
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130 | iconDimension = ImageProvider.ImageSizes.LARGEICON.getImageDimension();
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131 | icon = getImageIcon(iconDimension);
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132 | a.putValue(Action.LARGE_ICON_KEY, icon);
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133 | }
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134 |
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135 | /**
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136 | * Set both icons of an Action
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137 | * @param a The action for the icons
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138 | * @param attachImageResource Adds an resource named "ImageResource" if <code>true</code>
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139 | * @since 10369
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140 | */
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141 | public void attachImageIcon(AbstractAction a, boolean attachImageResource) {
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142 | attachImageIcon(a);
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143 | if (attachImageResource) {
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144 | a.putValue("ImageResource", this);
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145 | }
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146 | }
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147 |
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148 | /**
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149 | * Returns the image icon at default dimension.
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150 | * @return the image icon at default dimension
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151 | */
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152 | public ImageIcon getImageIcon() {
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153 | return getImageIcon(DEFAULT_DIMENSION);
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154 | }
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155 |
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156 | /**
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157 | * Get an ImageIcon object for the image of this resource.
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158 | * <p>
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159 | * Will return a multi-resolution image by default (if possible).
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160 | * @param dim The requested dimensions. Use (-1,-1) for the original size and (width, -1)
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161 | * to set the width, but otherwise scale the image proportionally.
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162 | * @return ImageIcon object for the image of this resource, scaled according to dim
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163 | * @see #getImageIconBounded(java.awt.Dimension)
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164 | */
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165 | public ImageIcon getImageIcon(Dimension dim) {
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166 | return getImageIcon(dim, true, null);
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167 | }
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168 |
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169 | /**
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170 | * Get an ImageIcon object for the image of this resource.
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171 | * @param dim The requested dimensions. Use (-1,-1) for the original size and (width, -1)
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172 | * to set the width, but otherwise scale the image proportionally.
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173 | * @param multiResolution If true, return a multi-resolution image
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174 | * (java.awt.image.MultiResolutionImage in Java 9), otherwise a plain {@link BufferedImage}.
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175 | * When running Java 8, this flag has no effect and a plain image will be returned in any case.
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176 | * @param resizeMode how to size/resize the image
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177 | * @return ImageIcon object for the image of this resource, scaled according to dim
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178 | * @since 12722
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179 | */
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180 | ImageIcon getImageIcon(Dimension dim, boolean multiResolution, ImageResizeMode resizeMode) {
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181 | return getImageIconAlreadyScaled(GuiSizesHelper.getDimensionDpiAdjusted(dim), multiResolution, false, resizeMode);
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182 | }
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183 |
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184 | private BufferedImage getImageFromCache(String cacheKey) {
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185 | try {
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186 | BufferedImageCacheEntry image = imgCache.get(cacheKey);
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187 | if (image == null || image.getImage() == null) {
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188 | return null;
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189 | }
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190 | Logging.trace("{0} is in cache :-)", cacheKey);
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191 | return image.getImage();
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192 | } catch (IOException e) {
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193 | throw new UncheckedIOException(e);
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194 | }
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195 | }
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196 |
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197 | /**
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198 | * Get an ImageIcon object for the image of this resource. A potential UI scaling is assumed
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199 | * to be already taken care of, so dim is already scaled accordingly.
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200 | * @param dim The requested dimensions. Use (-1,-1) for the original size and (width, -1)
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201 | * to set the width, but otherwise scale the image proportionally.
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202 | * @param multiResolution If true, return a multi-resolution image
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203 | * (java.awt.image.MultiResolutionImage in Java 9), otherwise a plain {@link BufferedImage}.
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204 | * When running Java 8, this flag has no effect and a plain image will be returned in any case.
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205 | * @param highResolution whether the high resolution variant should be used for overlays
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206 | * @param resizeMode how to size/resize the image
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207 | * @return ImageIcon object for the image of this resource, scaled according to dim
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208 | */
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209 | ImageIcon getImageIconAlreadyScaled(Dimension dim, boolean multiResolution, boolean highResolution, ImageResizeMode resizeMode) {
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210 | CheckParameterUtil.ensureThat((dim.width > 0 || dim.width == -1) && (dim.height > 0 || dim.height == -1),
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211 | () -> dim + " is invalid");
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212 |
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213 | if (resizeMode == null && svg != null) {
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214 | // upscale SVG icons
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215 | resizeMode = ImageResizeMode.AUTO;
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216 | } else if (resizeMode == null) {
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217 | resizeMode = ImageResizeMode.BOUNDED;
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218 | }
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219 | final String cacheKey = String.format(Locale.ROOT, "%s--%s--%d--%d",
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220 | this.cacheKey, resizeMode.name(), dim.width, dim.height);
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221 | BufferedImage img = getImageFromCache(cacheKey);
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222 | if (img == null) {
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223 | if (svgSupplier != null) {
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224 | svg = svgSupplier.get();
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225 | Logging.trace("{0} is not in cache :-(", cacheKey);
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226 | svgSupplier = null;
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227 | }
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228 | if (svg != null) {
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229 | img = ImageProvider.createImageFromSvg(svg, dim, resizeMode);
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230 | if (img == null) {
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231 | return null;
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232 | }
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233 | } else {
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234 | if (baseImage == null) throw new AssertionError();
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235 | ImageIcon icon = new ImageIcon(baseImage);
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236 | img = resizeMode.createBufferedImage(dim, new Dimension(icon.getIconWidth(), icon.getIconHeight()),
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237 | null, icon.getImage());
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238 | }
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239 | if (overlayInfo != null) {
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240 | for (ImageOverlay o : overlayInfo) {
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241 | o.process(img, highResolution);
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242 | }
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243 | }
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244 | if (isDisabled) {
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245 | //Use default Swing functionality to make icon look disabled by applying grayscaling filter.
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246 | Icon disabledIcon = UIManager.getLookAndFeel().getDisabledIcon(null, new ImageIcon(img));
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247 | if (disabledIcon == null) {
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248 | return null;
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249 | }
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250 |
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251 | //Convert Icon to ImageIcon with BufferedImage inside
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252 | img = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
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253 | disabledIcon.paintIcon(new JPanel(), img.getGraphics(), 0, 0);
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254 | }
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255 | if (img == null) {
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256 | return null;
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257 | }
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258 | BufferedImageCacheEntry cacheEntry = BufferedImageCacheEntry.pngEncoded(img);
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259 | Logging.trace("Storing {0} ({1} bytes) in cache...", cacheKey, cacheEntry.getContent().length);
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260 | imgCache.put(cacheKey, cacheEntry);
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261 | }
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262 |
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263 | if (!multiResolution)
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264 | return new ImageIcon(img);
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265 | else {
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266 | try {
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267 | Image mrImg = HiDPISupport.getMultiResolutionImage(img, this, resizeMode);
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268 | return new ImageIcon(mrImg);
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269 | } catch (NoClassDefFoundError e) {
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270 | Logging.trace(e);
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271 | return new ImageIcon(img);
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272 | }
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273 | }
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274 | }
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275 |
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276 | /**
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277 | * Get image icon with a certain maximum size. The image is scaled down
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278 | * to fit maximum dimensions. (Keeps aspect ratio)
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279 | * <p>
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280 | * Will return a multi-resolution image by default (if possible).
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281 | *
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282 | * @param maxSize The maximum size. One of the dimensions (width or height) can be -1,
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283 | * which means it is not bounded.
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284 | * @return ImageIcon object for the image of this resource, scaled down if needed, according to maxSize
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285 | */
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286 | public ImageIcon getImageIconBounded(Dimension maxSize) {
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287 | return getImageIcon(maxSize, true, ImageResizeMode.BOUNDED);
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288 | }
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289 |
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290 | /**
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291 | * Returns an {@link ImageIcon} for the given map image, at the specified size.
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292 | * Uses a cache to improve performance.
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293 | * @param iconSize size in pixels
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294 | * @return an {@code ImageIcon} for the given map image, at the specified size
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295 | */
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296 | public ImageIcon getPaddedIcon(Dimension iconSize) {
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297 | return getImageIcon(iconSize, true, ImageResizeMode.PADDED);
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298 | }
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299 |
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300 | static String statistics() {
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301 | return String.format("ImageResource cache: [%s]", imgCache.getStatistics());
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302 | }
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303 |
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304 | @Override
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305 | public String toString() {
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306 | return "ImageResource ["
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307 | + (svg != null ? "svg=" + svg : "")
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308 | + (baseImage != null ? "baseImage=" + baseImage : "") + ']';
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309 | }
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310 | }
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