1 /* |
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.java2d.jules; |
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27 |
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28 import java.awt.*; |
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29 import java.awt.geom.*; |
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30 import sun.awt.X11GraphicsEnvironment; |
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31 import sun.java2d.pipe.*; |
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32 import sun.java2d.xr.*; |
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33 |
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34 public class JulesPathBuf { |
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35 static final double[] emptyDash = new double[0]; |
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36 |
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37 private static final byte CAIRO_PATH_OP_MOVE_TO = 0; |
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38 private static final byte CAIRO_PATH_OP_LINE_TO = 1; |
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39 private static final byte CAIRO_PATH_OP_CURVE_TO = 2; |
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40 private static final byte CAIRO_PATH_OP_CLOSE_PATH = 3; |
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41 |
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42 private static final int CAIRO_FILL_RULE_WINDING = 0; |
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43 private static final int CAIRO_FILL_RULE_EVEN_ODD = 1; |
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44 |
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45 GrowablePointArray points = new GrowablePointArray(128); |
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46 GrowableByteArray ops = new GrowableByteArray(1, 128); |
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47 int[] xTrapArray = new int[512]; |
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48 |
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49 private static final boolean isCairoAvailable; |
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50 |
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51 static { |
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52 isCairoAvailable = |
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53 java.security.AccessController.doPrivileged( |
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54 new java.security.PrivilegedAction<Boolean>() { |
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55 public Boolean run() { |
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56 boolean loadSuccess = false; |
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57 if (X11GraphicsEnvironment.isXRenderAvailable()) { |
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58 try { |
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59 System.loadLibrary("jules"); |
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60 loadSuccess = true; |
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61 if (X11GraphicsEnvironment.isXRenderVerbose()) { |
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62 System.out.println( |
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63 "Xrender: INFO: Jules library loaded"); |
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64 } |
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65 } catch (UnsatisfiedLinkError ex) { |
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66 loadSuccess = false; |
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67 if (X11GraphicsEnvironment.isXRenderVerbose()) { |
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68 System.out.println( |
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69 "Xrender: INFO: Jules library not installed."); |
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70 } |
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71 } |
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72 } |
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73 return Boolean.valueOf(loadSuccess); |
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74 } |
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75 }); |
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76 } |
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77 |
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78 public static boolean isCairoAvailable() { |
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79 return isCairoAvailable; |
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80 } |
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81 |
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82 public TrapezoidList tesselateFill(Shape s, AffineTransform at, Region clip) { |
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83 int windingRule = convertPathData(s, at); |
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84 xTrapArray[0] = 0; |
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85 |
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86 xTrapArray = tesselateFillNative(points.getArray(), ops.getArray(), |
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87 points.getSize(), ops.getSize(), |
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88 xTrapArray, xTrapArray.length, |
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89 getCairoWindingRule(windingRule), |
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90 clip.getLoX(), clip.getLoY(), |
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91 clip.getHiX(), clip.getHiY()); |
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92 |
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93 return new TrapezoidList(xTrapArray); |
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94 } |
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95 |
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96 public TrapezoidList tesselateStroke(Shape s, BasicStroke bs, boolean thin, |
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97 boolean adjust, boolean antialias, |
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98 AffineTransform at, Region clip) { |
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99 |
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100 float lw; |
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101 if (thin) { |
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102 if (antialias) { |
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103 lw = 0.5f; |
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104 } else { |
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105 lw = 1.0f; |
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106 } |
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107 } else { |
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108 lw = bs.getLineWidth(); |
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109 } |
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110 |
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111 convertPathData(s, at); |
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112 |
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113 double[] dashArray = floatToDoubleArray(bs.getDashArray()); |
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114 xTrapArray[0] = 0; |
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115 |
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116 xTrapArray = |
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117 tesselateStrokeNative(points.getArray(), ops.getArray(), |
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118 points.getSize(), ops.getSize(), |
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119 xTrapArray, xTrapArray.length, lw, |
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120 bs.getEndCap(), bs.getLineJoin(), |
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121 bs.getMiterLimit(), dashArray, |
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122 dashArray.length, bs.getDashPhase(), |
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123 1, 0, 0, 0, 1, 0, |
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124 clip.getLoX(), clip.getLoY(), |
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125 clip.getHiX(), clip.getHiY()); |
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126 |
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127 return new TrapezoidList(xTrapArray); |
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128 } |
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129 |
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130 protected double[] floatToDoubleArray(float[] dashArrayFloat) { |
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131 double[] dashArrayDouble = emptyDash; |
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132 if (dashArrayFloat != null) { |
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133 dashArrayDouble = new double[dashArrayFloat.length]; |
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134 |
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135 for (int i = 0; i < dashArrayFloat.length; i++) { |
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136 dashArrayDouble[i] = dashArrayFloat[i]; |
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137 } |
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138 } |
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139 |
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140 return dashArrayDouble; |
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141 } |
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142 |
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143 protected int convertPathData(Shape s, AffineTransform at) { |
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144 PathIterator pi = s.getPathIterator(at); |
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145 |
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146 double[] coords = new double[6]; |
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147 double currX = 0; |
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148 double currY = 0; |
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149 |
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150 while (!pi.isDone()) { |
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151 int curOp = pi.currentSegment(coords); |
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152 |
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153 int pointIndex; |
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154 switch (curOp) { |
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155 |
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156 case PathIterator.SEG_MOVETO: |
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157 ops.addByte(CAIRO_PATH_OP_MOVE_TO); |
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158 pointIndex = points.getNextIndex(); |
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159 points.setX(pointIndex, DoubleToCairoFixed(coords[0])); |
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160 points.setY(pointIndex, DoubleToCairoFixed(coords[1])); |
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161 currX = coords[0]; |
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162 currY = coords[1]; |
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163 break; |
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164 |
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165 case PathIterator.SEG_LINETO: |
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166 ops.addByte(CAIRO_PATH_OP_LINE_TO); |
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167 pointIndex = points.getNextIndex(); |
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168 points.setX(pointIndex, DoubleToCairoFixed(coords[0])); |
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169 points.setY(pointIndex, DoubleToCairoFixed(coords[1])); |
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170 currX = coords[0]; |
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171 currY = coords[1]; |
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172 break; |
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173 |
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174 /** |
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175 * q0 = p0 |
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176 * q1 = (p0+2*p1)/3 |
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177 * q2 = (p2+2*p1)/3 |
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178 * q3 = p2 |
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179 */ |
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180 case PathIterator.SEG_QUADTO: |
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181 double x1 = coords[0]; |
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182 double y1 = coords[1]; |
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183 double x2, y2; |
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184 double x3 = coords[2]; |
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185 double y3 = coords[3]; |
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186 |
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187 x2 = x1 + (x3 - x1) / 3; |
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188 y2 = y1 + (y3 - y1) / 3; |
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189 x1 = currX + 2 * (x1 - currX) / 3; |
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190 y1 =currY + 2 * (y1 - currY) / 3; |
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191 |
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192 ops.addByte(CAIRO_PATH_OP_CURVE_TO); |
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193 pointIndex = points.getNextIndex(); |
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194 points.setX(pointIndex, DoubleToCairoFixed(x1)); |
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195 points.setY(pointIndex, DoubleToCairoFixed(y1)); |
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196 pointIndex = points.getNextIndex(); |
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197 points.setX(pointIndex, DoubleToCairoFixed(x2)); |
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198 points.setY(pointIndex, DoubleToCairoFixed(y2)); |
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199 pointIndex = points.getNextIndex(); |
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200 points.setX(pointIndex, DoubleToCairoFixed(x3)); |
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201 points.setY(pointIndex, DoubleToCairoFixed(y3)); |
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202 currX = x3; |
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203 currY = y3; |
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204 break; |
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205 |
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206 case PathIterator.SEG_CUBICTO: |
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207 ops.addByte(CAIRO_PATH_OP_CURVE_TO); |
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208 pointIndex = points.getNextIndex(); |
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209 points.setX(pointIndex, DoubleToCairoFixed(coords[0])); |
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210 points.setY(pointIndex, DoubleToCairoFixed(coords[1])); |
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211 pointIndex = points.getNextIndex(); |
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212 points.setX(pointIndex, DoubleToCairoFixed(coords[2])); |
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213 points.setY(pointIndex, DoubleToCairoFixed(coords[3])); |
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214 pointIndex = points.getNextIndex(); |
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215 points.setX(pointIndex, DoubleToCairoFixed(coords[4])); |
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216 points.setY(pointIndex, DoubleToCairoFixed(coords[5])); |
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217 currX = coords[4]; |
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218 currY = coords[5]; |
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219 break; |
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220 |
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221 case PathIterator.SEG_CLOSE: |
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222 ops.addByte(CAIRO_PATH_OP_CLOSE_PATH); |
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223 break; |
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224 } |
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225 |
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226 pi.next(); |
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227 } |
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228 |
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229 return pi.getWindingRule(); |
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230 } |
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231 |
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232 private static native int[] |
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233 tesselateStrokeNative(int[] pointArray, byte[] ops, |
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234 int pointCnt, int opCnt, |
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235 int[] xTrapArray, int xTrapArrayLength, |
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236 double lineWidth, int lineCap, int lineJoin, |
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237 double miterLimit, double[] dashArray, |
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238 int dashCnt, double offset, |
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239 double m00, double m01, double m02, |
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240 double m10, double m11, double m12, |
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241 int clipLowX, int clipLowY, |
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242 int clipWidth, int clipHeight); |
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243 |
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244 private static native int[] |
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245 tesselateFillNative(int[] pointArray, byte[] ops, int pointCnt, |
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246 int opCnt, int[] xTrapArray, int xTrapArrayLength, |
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247 int windingRule, int clipLowX, int clipLowY, int clipWidth, int clipHeight); |
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248 |
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249 public void clear() { |
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250 points.clear(); |
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251 ops.clear(); |
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252 xTrapArray[0] = 0; |
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253 } |
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254 |
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255 private static int DoubleToCairoFixed(double dbl) { |
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256 return (int) (dbl * 256); |
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257 } |
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258 |
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259 private static int getCairoWindingRule(int j2dWindingRule) { |
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260 switch(j2dWindingRule) { |
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261 case PathIterator.WIND_EVEN_ODD: |
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262 return CAIRO_FILL_RULE_EVEN_ODD; |
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263 |
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264 case PathIterator.WIND_NON_ZERO: |
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265 return CAIRO_FILL_RULE_WINDING; |
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266 |
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267 default: |
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268 throw new IllegalArgumentException("Illegal Java2D winding rule specified"); |
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269 } |
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270 } |
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271 } |
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