1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.layer.imagery;
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3 |
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4 | import java.awt.Rectangle;
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5 | import java.awt.RenderingHints;
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6 | import java.awt.geom.Point2D;
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7 | import java.awt.geom.Rectangle2D;
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8 | import java.awt.image.BufferedImage;
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9 | import java.awt.image.BufferedImageOp;
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10 | import java.awt.image.ColorModel;
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11 | import java.awt.image.DataBuffer;
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12 | import java.awt.image.DataBufferByte;
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13 |
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14 | import org.openstreetmap.josm.Main;
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15 | import org.openstreetmap.josm.gui.layer.ImageProcessor;
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16 |
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17 | /**
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18 | * Adds or removes the colorfulness of the image.
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19 | *
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20 | * @author Michael Zangl
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21 | * @since 10547
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22 | */
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23 | public class ColorfulImageProcessor implements ImageProcessor {
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24 | private ColorfulFilter op;
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25 | private double colorfulness = 1;
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26 |
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27 | /**
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28 | * Gets the colorfulness value.
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29 | * @return The value
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30 | */
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31 | public double getColorfulness() {
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32 | return colorfulness;
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33 | }
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34 |
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35 | /**
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36 | * Sets the colorfulness value. Clamps it to 0+
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37 | * @param colorfulness The value
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38 | */
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39 | public void setColorfulness(double colorfulness) {
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40 | if (colorfulness < 0) {
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41 | this.colorfulness = 0;
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42 | } else {
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43 | this.colorfulness = colorfulness;
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44 | }
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45 |
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46 | if (this.colorfulness < .95 || this.colorfulness > 1.05) {
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47 | op = new ColorfulFilter(this.colorfulness);
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48 | } else {
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49 | op = null;
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50 | }
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51 | }
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52 |
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53 | @Override
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54 | public BufferedImage process(BufferedImage image) {
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55 | if (op != null) {
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56 | return op.filter(image, null);
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57 | } else {
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58 | return image;
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59 | }
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60 | }
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61 |
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62 | @Override
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63 | public String toString() {
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64 | return "ColorfulImageProcessor [colorfulness=" + colorfulness + ']';
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65 | }
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66 |
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67 | static class ColorfulFilter implements BufferedImageOp {
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68 | private final double colorfulness;
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69 |
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70 | /**
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71 | * Create a new colorful filter.
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72 | * @param colorfulness The colorfulness as defined in the {@link ColorfulImageProcessor} class.
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73 | */
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74 | ColorfulFilter(double colorfulness) {
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75 | this.colorfulness = colorfulness;
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76 | }
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77 |
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78 | @Override
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79 | public BufferedImage filter(BufferedImage src, BufferedImage dest) {
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80 | if (src.getWidth() == 0 || src.getHeight() == 0) {
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81 | return src;
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82 | }
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83 |
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84 | if (dest == null) {
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85 | dest = createCompatibleDestImage(src, null);
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86 | }
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87 | DataBuffer srcBuffer = src.getRaster().getDataBuffer();
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88 | DataBuffer destBuffer = dest.getRaster().getDataBuffer();
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89 | if (!(srcBuffer instanceof DataBufferByte) || !(destBuffer instanceof DataBufferByte)) {
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90 | Main.trace("Cannot apply color filter: Images do not use DataBufferByte.");
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91 | return src;
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92 | }
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93 |
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94 | int type = src.getType();
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95 | if (type != dest.getType()) {
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96 | Main.trace("Cannot apply color filter: Src / Dest differ in type (" + type + '/' + dest.getType() + ')');
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97 | return src;
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98 | }
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99 | int redOffset, greenOffset, blueOffset, alphaOffset = 0;
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100 | switch (type) {
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101 | case BufferedImage.TYPE_3BYTE_BGR:
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102 | blueOffset = 0;
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103 | greenOffset = 1;
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104 | redOffset = 2;
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105 | break;
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106 | case BufferedImage.TYPE_4BYTE_ABGR:
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107 | case BufferedImage.TYPE_4BYTE_ABGR_PRE:
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108 | blueOffset = 1;
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109 | greenOffset = 2;
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110 | redOffset = 3;
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111 | break;
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112 | case BufferedImage.TYPE_INT_ARGB:
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113 | case BufferedImage.TYPE_INT_ARGB_PRE:
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114 | redOffset = 0;
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115 | greenOffset = 1;
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116 | blueOffset = 2;
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117 | alphaOffset = 3;
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118 | break;
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119 | default:
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120 | Main.trace("Cannot apply color filter: Source image is of wrong type (" + type + ").");
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121 | return src;
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122 | }
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123 | doFilter((DataBufferByte) srcBuffer, (DataBufferByte) destBuffer, redOffset, greenOffset, blueOffset,
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124 | alphaOffset, src.getAlphaRaster() != null);
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125 | return dest;
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126 | }
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127 |
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128 | private void doFilter(DataBufferByte src, DataBufferByte dest, int redOffset, int greenOffset, int blueOffset,
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129 | int alphaOffset, boolean hasAlpha) {
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130 | byte[] srcPixels = src.getData();
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131 | byte[] destPixels = dest.getData();
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132 | if (srcPixels.length != destPixels.length) {
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133 | Main.trace("Cannot apply color filter: Source/Dest lengths differ.");
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134 | return;
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135 | }
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136 | int entries = hasAlpha ? 4 : 3;
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137 | for (int i = 0; i < srcPixels.length; i += entries) {
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138 | int r = srcPixels[i + redOffset] & 0xff;
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139 | int g = srcPixels[i + greenOffset] & 0xff;
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140 | int b = srcPixels[i + blueOffset] & 0xff;
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141 | double luminosity = r * .21d + g * .72d + b * .07d;
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142 | destPixels[i + redOffset] = mix(r, luminosity);
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143 | destPixels[i + greenOffset] = mix(g, luminosity);
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144 | destPixels[i + blueOffset] = mix(b, luminosity);
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145 | if (hasAlpha) {
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146 | destPixels[i + alphaOffset] = srcPixels[i + alphaOffset];
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147 | }
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148 | }
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149 | }
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150 |
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151 | private byte mix(int color, double luminosity) {
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152 | int val = (int) (colorfulness * color + (1 - colorfulness) * luminosity);
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153 | if (val < 0) {
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154 | return 0;
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155 | } else if (val > 0xff) {
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156 | return (byte) 0xff;
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157 | } else {
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158 | return (byte) val;
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159 | }
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160 | }
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161 |
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162 | @Override
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163 | public Rectangle2D getBounds2D(BufferedImage src) {
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164 | return new Rectangle(src.getWidth(), src.getHeight());
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165 | }
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166 |
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167 | @Override
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168 | public BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel destCM) {
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169 | return new BufferedImage(src.getWidth(), src.getHeight(), src.getType());
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170 | }
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171 |
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172 | @Override
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173 | public Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
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174 | return (Point2D) srcPt.clone();
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175 | }
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176 |
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177 | @Override
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178 | public RenderingHints getRenderingHints() {
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179 | return null;
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180 | }
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181 | }
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182 | }
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