[3719] | 1 | // License: GPL. For details, see LICENSE file.
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[3715] | 2 | package org.openstreetmap.josm.data.imagery;
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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.Color;
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| 7 | import java.awt.Font;
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| 8 | import java.awt.Graphics;
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| 9 | import java.awt.Image;
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| 10 | import java.awt.Transparency;
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| 11 | import java.awt.image.BufferedImage;
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| 12 | import java.io.IOException;
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| 13 | import java.io.ObjectInputStream;
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| 14 | import java.io.ObjectOutputStream;
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| 15 | import java.io.Serializable;
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| 16 | import java.lang.ref.SoftReference;
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| 17 |
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| 18 | import javax.imageio.ImageIO;
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| 19 |
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| 20 | import org.openstreetmap.josm.data.coor.EastNorth;
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| 21 | import org.openstreetmap.josm.gui.NavigatableComponent;
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| 22 | import org.openstreetmap.josm.gui.layer.ImageryLayer;
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| 23 | import org.openstreetmap.josm.gui.layer.WMSLayer;
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| 24 |
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| 25 | public class GeorefImage implements Serializable {
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| 26 | private static final long serialVersionUID = 1L;
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| 27 |
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[4065] | 28 | public enum State { IMAGE, NOT_IN_CACHE, FAILED, PARTLY_IN_CACHE}
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[3715] | 29 |
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| 30 | private WMSLayer layer;
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| 31 | private State state;
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| 32 |
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| 33 | private BufferedImage image;
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| 34 | private SoftReference<BufferedImage> reImg;
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| 35 | private int xIndex;
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| 36 | private int yIndex;
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| 37 |
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| 38 | private static final Color transparentColor = new Color(0,0,0,0);
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| 39 | private Color fadeColor = transparentColor;
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| 40 |
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| 41 | public EastNorth getMin() {
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| 42 | return layer.getEastNorth(xIndex, yIndex);
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| 43 | }
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| 44 |
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| 45 | public EastNorth getMax() {
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| 46 | return layer.getEastNorth(xIndex+1, yIndex+1);
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| 47 | }
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| 48 |
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| 49 |
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| 50 | public GeorefImage(WMSLayer layer) {
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| 51 | this.layer = layer;
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| 52 | }
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| 53 |
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| 54 | public void changePosition(int xIndex, int yIndex) {
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| 55 | if (!equalPosition(xIndex, yIndex)) {
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| 56 | this.xIndex = xIndex;
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| 57 | this.yIndex = yIndex;
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| 58 | this.image = null;
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| 59 | flushedResizedCachedInstance();
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| 60 | }
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| 61 | }
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| 62 |
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| 63 | public boolean equalPosition(int xIndex, int yIndex) {
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| 64 | return this.xIndex == xIndex && this.yIndex == yIndex;
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| 65 | }
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| 66 |
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| 67 | public void changeImage(State state, BufferedImage image) {
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| 68 | flushedResizedCachedInstance();
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| 69 | this.image = image;
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| 70 | this.state = state;
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| 71 |
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| 72 | switch (state) {
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| 73 | case FAILED:
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| 74 | {
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| 75 | BufferedImage img = createImage();
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| 76 | layer.drawErrorTile(img);
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| 77 | this.image = img;
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| 78 | break;
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| 79 | }
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| 80 | case NOT_IN_CACHE:
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| 81 | {
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| 82 | BufferedImage img = createImage();
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| 83 | Graphics g = img.getGraphics();
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| 84 | g.setColor(Color.GRAY);
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| 85 | g.fillRect(0, 0, img.getWidth(), img.getHeight());
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| 86 | Font font = g.getFont();
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| 87 | Font tempFont = font.deriveFont(Font.PLAIN).deriveFont(36.0f);
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| 88 | g.setFont(tempFont);
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| 89 | g.setColor(Color.BLACK);
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[3808] | 90 | String text = tr("Not in cache");
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| 91 | g.drawString(text, (img.getWidth() - g.getFontMetrics().stringWidth(text)) / 2, img.getHeight()/2);
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[3715] | 92 | g.setFont(font);
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| 93 | this.image = img;
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| 94 | break;
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| 95 | }
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| 96 | default:
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[4014] | 97 | if (this.image != null) {
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| 98 | this.image = layer.sharpenImage(this.image);
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| 99 | }
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[3715] | 100 | break;
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| 101 | }
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| 102 | }
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| 103 |
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| 104 | private BufferedImage createImage() {
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[3808] | 105 | return new BufferedImage(layer.getImageSize(), layer.getImageSize(), BufferedImage.TYPE_INT_RGB);
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[3715] | 106 | }
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| 107 |
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| 108 | public boolean paint(Graphics g, NavigatableComponent nc, int xIndex, int yIndex, int leftEdge, int bottomEdge) {
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| 109 | if (image == null)
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| 110 | return false;
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| 111 |
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| 112 | if(!(this.xIndex == xIndex && this.yIndex == yIndex))
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| 113 | return false;
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| 114 |
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| 115 | int left = layer.getImageX(xIndex);
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| 116 | int bottom = layer.getImageY(yIndex);
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| 117 | int width = layer.getImageWidth(xIndex);
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| 118 | int height = layer.getImageHeight(yIndex);
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| 119 |
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| 120 | int x = left - leftEdge;
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| 121 | int y = nc.getHeight() - (bottom - bottomEdge) - height;
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| 122 |
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| 123 | // This happens if you zoom outside the world
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| 124 | if(width == 0 || height == 0)
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| 125 | return false;
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| 126 |
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| 127 | // TODO: implement per-layer fade color
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| 128 | Color newFadeColor;
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| 129 | if (ImageryLayer.PROP_FADE_AMOUNT.get() == 0) {
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| 130 | newFadeColor = transparentColor;
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| 131 | } else {
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| 132 | newFadeColor = ImageryLayer.getFadeColorWithAlpha();
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| 133 | }
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| 134 |
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| 135 | BufferedImage img = reImg == null?null:reImg.get();
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| 136 | if(img != null && img.getWidth() == width && img.getHeight() == height && fadeColor.equals(newFadeColor)) {
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| 137 | g.drawImage(img, x, y, null);
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| 138 | return true;
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| 139 | }
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| 140 |
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| 141 | fadeColor = newFadeColor;
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| 142 |
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| 143 | boolean alphaChannel = WMSLayer.PROP_ALPHA_CHANNEL.get() && getImage().getTransparency() != Transparency.OPAQUE;
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| 144 |
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| 145 | try {
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| 146 | if(img != null) {
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| 147 | img.flush();
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| 148 | }
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| 149 | long freeMem = Runtime.getRuntime().maxMemory() - Runtime.getRuntime().totalMemory();
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| 150 | //System.out.println("Free Memory: "+ (freeMem/1024/1024) +" MB");
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| 151 | // Notice that this value can get negative due to integer overflows
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| 152 | //System.out.println("Img Size: "+ (width*height*3/1024/1024) +" MB");
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| 153 |
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| 154 | int multipl = alphaChannel ? 4 : 3;
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| 155 | // This happens when requesting images while zoomed out and then zooming in
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| 156 | // Storing images this large in memory will certainly hang up JOSM. Luckily
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| 157 | // traditional rendering is as fast at these zoom levels, so it's no loss.
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| 158 | // Also prevent caching if we're out of memory soon
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| 159 | if(width > 2000 || height > 2000 || width*height*multipl > freeMem) {
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| 160 | fallbackDraw(g, getImage(), x, y, width, height, alphaChannel);
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| 161 | } else {
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| 162 | // We haven't got a saved resized copy, so resize and cache it
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| 163 | img = new BufferedImage(width, height, alphaChannel?BufferedImage.TYPE_INT_ARGB:BufferedImage.TYPE_3BYTE_BGR);
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| 164 | img.getGraphics().drawImage(getImage(),
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| 165 | 0, 0, width, height, // dest
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| 166 | 0, 0, getImage().getWidth(null), getImage().getHeight(null), // src
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| 167 | null);
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| 168 | if (!alphaChannel) {
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| 169 | drawFadeRect(img.getGraphics(), 0, 0, width, height);
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| 170 | }
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| 171 | img.getGraphics().dispose();
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| 172 | g.drawImage(img, x, y, null);
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| 173 | reImg = new SoftReference<BufferedImage>(img);
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| 174 | }
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| 175 | } catch(Exception e) {
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| 176 | fallbackDraw(g, getImage(), x, y, width, height, alphaChannel);
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| 177 | }
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| 178 | return true;
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| 179 | }
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| 180 |
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| 181 | private void fallbackDraw(Graphics g, Image img, int x, int y, int width, int height, boolean alphaChannel) {
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| 182 | flushedResizedCachedInstance();
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| 183 | g.drawImage(
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| 184 | img, x, y, x + width, y + height,
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| 185 | 0, 0, img.getWidth(null), img.getHeight(null),
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| 186 | null);
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| 187 | if (!alphaChannel) { //FIXME: fading for layers with alpha channel currently is not supported
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| 188 | drawFadeRect(g, x, y, width, height);
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| 189 | }
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| 190 | }
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| 191 |
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| 192 | private void drawFadeRect(Graphics g, int x, int y, int width, int height) {
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| 193 | if (fadeColor != transparentColor) {
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| 194 | g.setColor(fadeColor);
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| 195 | g.fillRect(x, y, width, height);
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| 196 | }
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| 197 | }
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| 198 |
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| 199 | private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
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| 200 | state = (State) in.readObject();
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| 201 | boolean hasImage = in.readBoolean();
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| 202 | if (hasImage) {
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| 203 | image = (ImageIO.read(ImageIO.createImageInputStream(in)));
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| 204 | } else {
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| 205 | in.readObject(); // read null from input stream
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| 206 | image = null;
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| 207 | }
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| 208 | }
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| 209 |
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| 210 | private void writeObject(ObjectOutputStream out) throws IOException {
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| 211 | out.writeObject(state);
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| 212 | if(getImage() == null) {
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| 213 | out.writeBoolean(false);
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| 214 | out.writeObject(null);
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| 215 | } else {
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| 216 | out.writeBoolean(true);
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| 217 | ImageIO.write(getImage(), "png", ImageIO.createImageOutputStream(out));
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| 218 | }
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| 219 | }
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| 220 |
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| 221 | public void flushedResizedCachedInstance() {
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| 222 | if (reImg != null) {
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| 223 | BufferedImage img = reImg.get();
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| 224 | if (img != null) {
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| 225 | img.flush();
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| 226 | }
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| 227 | }
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| 228 | reImg = null;
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| 229 | }
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| 230 |
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| 231 |
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| 232 | public BufferedImage getImage() {
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| 233 | return image;
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| 234 | }
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| 235 |
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| 236 | public State getState() {
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| 237 | return state;
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| 238 | }
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| 239 |
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| 240 | public int getXIndex() {
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| 241 | return xIndex;
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| 242 | }
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| 243 |
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| 244 | public int getYIndex() {
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| 245 | return yIndex;
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| 246 | }
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| 247 |
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| 248 | public void setLayer(WMSLayer layer) {
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| 249 | this.layer = layer;
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| 250 | }
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| 251 | }
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