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annotate dwt/graphics/RGB.d @ 37:642f460a0908

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Fixed a lot of compile errors, a "hello world" app compiles now
author Jacob Carlborg <doob@me.com> <jacob.carlborg@gmail.com>
date Fri, 10 Oct 2008 12:29:48 +0200
parents db5a898b2119
children d8635bb48c7c
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *
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11 * Port to the D programming language:
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12 * Jacob Carlborg <jacob.carlborg@gmail.com>
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13 *******************************************************************************/
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14 module dwt.graphics.RGB;
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17 import dwt.DWT;
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18 import dwt.internal.SerializableCompatibility;
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20 import tango.text.convert.Format;
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21 import dwt.dwthelper.utils;
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0
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23 /**
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24 * Instances of this class are descriptions of colors in
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25 * terms of the primary additive color model (red, green and
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26 * blue). A color may be described in terms of the relative
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27 * intensities of these three primary colors. The brightness
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28 * of each color is specified by a value in the range 0 to 255,
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29 * where 0 indicates no color (blackness) and 255 indicates
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30 * maximum intensity.
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31 * <p>
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32 * The hashCode() method in this class uses the values of the public
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33 * fields to compute the hash value. When storing instances of the
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34 * class in hashed collections, do not modify these fields after the
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35 * object has been inserted.
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36 * </p>
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37 * <p>
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38 * Application code does <em>not</em> need to explicitly release the
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39 * resources managed by each instance when those instances are no longer
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40 * required, and thus no <code>dispose()</code> method is provided.
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41 * </p>
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42 *
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43 * @see Color
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44 */
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45
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46 public final class RGB : SerializableCompatibility {
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47
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48 /**
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49 * the red component of the RGB
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50 */
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51 public int red;
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52
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53 /**
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54 * the green component of the RGB
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55 */
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56 public int green;
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57
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58 /**
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59 * the blue component of the RGB
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60 */
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61 public int blue;
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62
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63 static const long serialVersionUID = 3258415023461249074L;
0
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64
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65 /**
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66 * Constructs an instance of this class with the given
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67 * red, green and blue values.
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68 *
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69 * @param red the red component of the new instance
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70 * @param green the green component of the new instance
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71 * @param blue the blue component of the new instance
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72 *
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73 * @exception IllegalArgumentException <ul>
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74 * <li>ERROR_INVALID_ARGUMENT - if the red, green or blue argument is not between 0 and 255</li>
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75 * </ul>
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76 */
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77 public this(int red, int green, int blue) {
0
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78 if ((red > 255) || (red < 0) ||
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79 (green > 255) || (green < 0) ||
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80 (blue > 255) || (blue < 0))
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81 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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82 this.red = red;
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83 this.green = green;
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84 this.blue = blue;
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85 }
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86
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87 /**
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88 * Constructs an instance of this class with the given
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89 * hue, saturation, and brightness.
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90 *
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91 * @param hue the hue value for the HSB color (from 0 to 360)
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92 * @param saturation the saturation value for the HSB color (from 0 to 1)
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93 * @param brightness the brightness value for the HSB color (from 0 to 1)
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94 *
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95 * @exception IllegalArgumentException <ul>
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96 * <li>ERROR_INVALID_ARGUMENT - if the hue is not between 0 and 360 or
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97 * the saturation or brightness is not between 0 and 1</li>
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98 * </ul>
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99 *
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100 * @since 3.2
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101 */
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102 public this(float hue, float saturation, float brightness) {
0
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103 if (hue < 0 || hue > 360 || saturation < 0 || saturation > 1 ||
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104 brightness < 0 || brightness > 1) {
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105 DWT.error(DWT.ERROR_INVALID_ARGUMENT);
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106 }
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107 float r, g, b;
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108 if (saturation is 0) {
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109 r = g = b = brightness;
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110 } else {
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111 if (hue is 360) hue = 0;
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112 hue /= 60;
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113 int i = cast(int)hue;
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114 float f = hue - i;
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115 float p = brightness * (1 - saturation);
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116 float q = brightness * (1 - saturation * f);
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117 float t = brightness * (1 - saturation * (1 - f));
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118 switch(i) {
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119 case 0:
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120 r = brightness;
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121 g = t;
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122 b = p;
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123 break;
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124 case 1:
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125 r = q;
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126 g = brightness;
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127 b = p;
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128 break;
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129 case 2:
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130 r = p;
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131 g = brightness;
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132 b = t;
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133 break;
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134 case 3:
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135 r = p;
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136 g = q;
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137 b = brightness;
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138 break;
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139 case 4:
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140 r = t;
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141 g = p;
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142 b = brightness;
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143 break;
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144 case 5:
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145 default:
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146 r = brightness;
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147 g = p;
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148 b = q;
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149 break;
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150 }
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151 }
7
e831403a80a9 Add 'cast' to casts
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152 red = cast(int)(r * 255 + 0.5);
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153 green = cast(int)(g * 255 + 0.5);
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154 blue = cast(int)(b * 255 + 0.5);
0
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155 }
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156
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157 /**
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158 * Returns the hue, saturation, and brightness of the color.
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159 *
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160 * @return color space values in float format (hue, saturation, brightness)
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161 *
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162 * @since 3.2
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163 */
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164 public float[] getHSB() {
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165 float r = red / 255f;
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166 float g = green / 255f;
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167 float b = blue / 255f;
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168 float max = Math.max(Math.max(r, g), b);
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169 float min = Math.min(Math.min(r, g), b);
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170 float delta = max - min;
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171 float hue = 0;
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172 float brightness = max;
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173 float saturation = max is 0 ? 0 : (max - min) / max;
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174 if (delta !is 0) {
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175 if (r is max) {
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176 hue = (g - b) / delta;
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177 } else {
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178 if (g is max) {
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179 hue = 2 + (b - r) / delta;
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180 } else {
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181 hue = 4 + (r - g) / delta;
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182 }
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183 }
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184 hue *= 60;
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185 if (hue < 0) hue += 360;
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186 }
37
642f460a0908 Fixed a lot of compile errors, a "hello world" app compiles now
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187 return [hue, saturation, brightness];
0
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188 }
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189
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190 /**
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191 * Compares the argument to the receiver, and returns true
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192 * if they represent the <em>same</em> object using a class
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193 * specific comparison.
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194 *
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195 * @param object the object to compare with this object
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196 * @return <code>true</code> if the object is the same as this object and <code>false</code> otherwise
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197 *
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198 * @see #hashCode()
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199 */
36
db5a898b2119 Fixed a lot of compile errors
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200 public int opEquals(Object object) {
0
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201 if (object is this) return true;
8
a9ab4c738ed8 Fix: instanceof
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202 if (!( null !is cast(RGB)object )) return false;
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e831403a80a9 Add 'cast' to casts
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203 RGB rgb = cast(RGB)object;
0
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204 return (rgb.red is this.red) && (rgb.green is this.green) && (rgb.blue is this.blue);
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205 }
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206
29
d408fc12b991 Ported dwt.graphics.Color and RGB
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207 alias opEquals equals;
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208
0
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209 /**
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210 * Returns an integer hash code for the receiver. Any two
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211 * objects that return <code>true</code> when passed to
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212 * <code>equals</code> must return the same value for this
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213 * method.
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214 *
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215 * @return the receiver's hash
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216 *
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217 * @see #equals(Object)
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218 */
29
d408fc12b991 Ported dwt.graphics.Color and RGB
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diff changeset
219 public hash_t toHash() {
0
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220 return (blue << 16) | (green << 8) | red;
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221 }
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222
29
d408fc12b991 Ported dwt.graphics.Color and RGB
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223 alias toHash hashCode;
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224
0
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225 /**
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226 * Returns a string containing a concise, human-readable
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227 * description of the receiver.
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228 *
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229 * @return a string representation of the <code>RGB</code>
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230 */
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231 public String toString() {
36
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diff changeset
232 return Format("RGB {{}{}{}{}{}{}" , red , ", " , green , ", " , blue , "}"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
0
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233 }
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234
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235 }