Mercurial > MadButterfly

annotate nodejs/svg.js @ 703:3457519e3b9c

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Add rect and matrix support. The test.svg can be rendered almost correctly now.
author wycc
date Fri, 13 Aug 2010 08:16:18 +0800
parents 492da72e6537
children d950487bd9f9
rev   line source
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1 var libxml = require('libxmljs');
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2 var sys=require('sys');
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3 var mbfly = require("mbfly");
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4 var mb_rt = new mbfly.mb_rt(":0.0", 720,480);
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5 var ldr = mbfly.img_ldr_new(".");
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6
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7 function MB_loadSVG(mb_rt,root,filename) {
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8 var doc = libxml.parseXmlFile(filename);
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9 var nodes = doc.root().childNodes();
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10 var coord = mb_rt.coord_new(root);
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11 var k;
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12
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13 for(k in nodes) {
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14 var n = nodes[k].name();
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15 if (n == "defs") {
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16 _MB_parseDefs(root,nodes[k]);
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17 } else if (n == "g") {
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18 _MB_parseGroup(root,'root_coord',nodes[k]);
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19 }
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20 }
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21 }
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22
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23 function getInteger(n,name)
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24 {
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25 if (n == null) return 0;
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26 var a = n.attr(name);
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27 if (a==null) return 0;
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28 return parseInt(a.value());
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29 }
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30 function parsePointSize(s)
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31 {
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32 var fs=0;
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33 var i;
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34
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35 for(i=0;i<s.length;i++) {
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36 if (s[i]<'0' || s[i] > '9') break;
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37 fs = fs*10 + (s[i]-'0');
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38 }
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39 return fs;
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40
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41 }
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42
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43
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44 function parseColor(c)
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45 {
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46 if (c[0] == '#') {
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47 return parseInt(c.substring(1,3),16)<<16 | parseInt(c.substring(3,5),16)<<8 | parseInt(c.substring(5,7),16);
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48 }
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49 }
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50 function parseTextStyle(style,n)
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51 {
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52 var attr;
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53 if (n) {
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54 attr = n.attr('style');
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55 } else {
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56 attr = null;
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57 }
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58 if (attr == null) {
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59 return;
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60 }
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61 var f = attr.value().split(';');
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62
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63 for(i in f) {
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64 var kv = f[i].split(':');
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65 if (kv[0] == 'font-size') {
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66 style.fs = parsePointSize(kv[1]);
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67 } else if (kv[0] == "font-style") {
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68 } else if (kv[0] == "font-weight") {
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69 } else if (kv[0] == "fill") {
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70 style.color = parseColor(kv[1]);
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71 } else if (kv[0] == "fill-opacity") {
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72 } else if (kv[0] == "stroke-opacity") {
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73 } else if (kv[0] == "stroke") {
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74 } else if (kv[0] == "stroke-width") {
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75 } else if (kv[0] == "stroke-linecap") {
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76 } else if (kv[0] == "stroke-linejoin") {
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77 } else if (kv[0] == "stroke-lineopacity") {
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78 } else if (kv[0] == "font-family") {
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79 style.family = kv[1];
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80 } else if (kv[0] == "font-stretch") {
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81 } else if (kv[0] == "font-variant") {
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82 } else if (kv[0] == "text-anchor") {
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83 } else if (kv[0] == "text-align") {
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84 } else if (kv[0] == "writing-mode") {
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85 } else if (kv[0] == "line-height") {
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86 } else {
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87 sys.puts("Unknown style: "+kv[0]);
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88 }
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89 }
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90 }
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91
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92 function _MB_parseTSpan(coord, n,style)
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93 {
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94 var x = getInteger(n,'x');
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95 var y = getInteger(n,'y');
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96 var tcoord = mb_rt.coord_new(coord);
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97 var nodes = n.childNodes();
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98 var k;
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99
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100 sys.puts(n.text());
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101 var obj = mb_rt.stext_new(n.text(),x,y);
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102 parseTextStyle(style,n);
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103 style.paint = mb_rt.paint_color_new(1,1,1,1);
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104 style.face=mb_rt.font_face_query(style.family, 2, 100);
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105 obj.set_style([[20,style.face,style.fs]]);
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106 style.paint.fill(obj);
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107 tcoord.add_shape(obj);
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108 for(k in nodes) {
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109 var name = nodes[k].name();
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110 if (name == "tspan") {
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111 _MB_parseTSpan(tcoord,nodes[k]);
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112 } else {
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113 }
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114 }
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115 }
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116
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117 function _MB_parseText(coord,id, n)
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118 {
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119 var x = getInteger(n,'x');
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120 var y = getInteger(n,'y');
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121 var tcoord = mb_rt.coord_new(coord);
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122 var style = new Object();
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123 style.fs = 20;
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124 style.family = 'courier';
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125 parseTextStyle(style,n);
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126 var nodes = n.childNodes();
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127 var k;
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128 for(k in nodes) {
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129 var n = nodes[k].name();
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130 if (n == "tspan") {
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131 _MB_parseTSpan(tcoord,nodes[k],style);
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132 } else {
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133 }
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134 }
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135
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136
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137 }
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138
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139
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140 function parseTransform(coord, s)
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141 {
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142 var off = s.indexOf('translate');
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143 if (off != -1) {
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144 var ss = s.substring(off+9);
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145 for(i=0;i<ss.length;i++) {
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146 if (ss[i] == '(') break;
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147 }
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148 ss = ss.substring(i+1);
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149 for(i=0;i<ss.length;i++) {
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150 if (ss[i] == ')') {
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151 ss = ss.substring(0,i);
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152 break;
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153 }
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154 }
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155 var f = ss.split(',');
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156 var x,y;
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157 x = parseInt(f[0]);
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158 y = parseInt(f[1]);
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159 coord[2] = x;
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160 coord[5] = y;
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161 }
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162 off = s.indexOf('matrix');
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163 if (off != -1) {
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164 sys.puts("matrix");
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165 var end = s.indexOf(')');
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166 var m = s.substring(7,end);
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167 var fields = m.split(',');
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168 coord[0] = parseFloat(fields[0]);
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169 coord[1] = parseFloat(fields[1]);
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170 coord[2] = parseFloat(fields[4]);
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171 coord[3] = parseFloat(fields[2]);
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172 coord[4] = parseFloat(fields[3]);
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173 coord[5] = parseFloat(fields[5]);
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174 }
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175 }
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176
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177 function _MB_parseRect(coord, id, n)
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178 {
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179 var x = getInteger(n,'x');
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180 var y = getInteger(n,'y');
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181 var w = getInteger(n,'width');
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182 var h = getInteger(n,'height');
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183 var paint;
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184
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185 var style = n.attr('style');
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186
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187 if (style==null) {
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188 paint = mb_rt.paint_color_new(0,0,0,0.1);
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189 } else {
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190 var items = style.value().split(';');
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191 var fill = '';
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192 var alpha;
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193 for(i in items) {
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194 sys.puts(items[i]);
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195 var f = items[i].split(':');
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196 if (f[0] == 'opacity') {
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197 alpha = f[1];
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198 } else if (f[0] == 'fill') {
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199 fill = f[1];
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200 } else if (f[0] == 'fill-opacity') {
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201 } else if (f[0] == 'stroke') {
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202 } else if (f[0] == 'stroken-width') {
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203 } else if (f[0] == 'stroke-opacity') {
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204 }
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205 }
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206 sys.puts("fill="+fill);
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207 if (fill[0]=='#') {
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208 var r,g,b;
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209 r = parseInt(fill.substring(1,3),16)/256;
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210 g = parseInt(fill.substring(3,5),16)/256;
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211 b = parseInt(fill.substring(5,7),16)/256;
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212 sys.puts("r="+r+" g="+g+" b="+b+" a="+alpha);
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213
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214 paint = mb_rt.paint_color_new(r,g,b,parseFloat(alpha));
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215 } else {
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216 paint = mb_rt.paint_color_new(0,0,0,1);
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217 }
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218 }
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219 var rect = mb_rt.rect_new(x,y,w,h,10, 10);
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220 sys.puts("rect x="+x+" y="+y+" w="+w+" h="+h);
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221 paint.fill(rect);
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222 coord.add_shape(rect);
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223 }
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224
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225 function _MB_parseGroup(root, group_id, n)
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226 {
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227 var k;
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228 var nodes = n.childNodes();
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229 var coord = mb_rt.coord_new(root);
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230 // Parse the transform and style here
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231 var trans = n.attr('transform');
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232 if (trans!=null) {
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233 parseTransform(coord, trans.value());
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234 }
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235
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236 for(k in nodes) {
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237 var n = nodes[k].name();
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238 var attr = nodes[k].attr('id');
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239 var id;
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240 if (attr) {
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241 id = attr.value();
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242 }
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243 if (n == "g") {
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244 _MB_parseGroup(coord, id, nodes[k]);
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245 } else if (n == "text") {
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246 _MB_parseText(coord, id, nodes[k]);
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247 } else if (n == "rect") {
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248 _MB_parseRect(coord, id, nodes[k]);
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249 } else if (n == "image") {
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250 _MB_parseImage(coord, id, nodes[k]);
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251 }
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252 }
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253
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254 }
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255
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256 function _MB_parseImage(coord,id, n)
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257 {
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258 sys.puts("---> image");
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259 var ref = n.attr('href').value();
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260
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261 if (ref == null) return;
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262 sys.puts(ref);
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263 if (ref.substr(0,7) == "file://") {
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264 ref = ref.substring(7);
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265 } else if (ref.substr(0,5)=="file:") {
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266 ref = ref.substring(5);
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267 } else {
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268 return;
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269 }
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270 sys.puts("Load image "+ref);
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271 var w;
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272 var h;
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273 var x,y;
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274
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275 w = n.attr("width");
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276 if (w == null) return;
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277 w = parseInt(w.value());
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278 h = n.attr("height");
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279 if (h == null) return;
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280 h = parseInt(h.value());
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281 x = n.attr("x");
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282 if (x == null) return;
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283 x = parseInt(x.value());
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284 y = n.attr("y");
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285 if (y == null) return;
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286 y = parseInt(y.value());
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287 sys.puts("x="+x+",y="+y+",w="+w+",h="+h);
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288 var img = mb_rt.image_new(x,y,w,h);
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289 var img_data = ldr.load(ref);
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290 sys.puts(img_data);
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291 var paint = mb_rt.paint_image_new(img_data);
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292 paint.fill(img);
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293 coord.add_shape(img);
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294 }
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295
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296 function _MB_parseDefs(root,n)
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297 {
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298 var k;
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299 var nodes = n.childNodes();
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300
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301 for(k in nodes) {
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302 var name = nodes[k].name();
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303 if (name == "linearGradient") {
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304 //_MB_parseLinearGradient(root,nodes[k]);
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305 }
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306 }
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307 }
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308
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309
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310 MB_loadSVG(mb_rt,mb_rt.root,"test.svg");
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311 mb_rt.redraw_all();