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22 | "use strict";
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23 |
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24 | Object.defineProperty(exports, "__esModule", {
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25 | value: true
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26 | });
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27 | exports.Pattern = void 0;
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28 | exports.getTilingPatternIR = getTilingPatternIR;
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29 |
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30 | var _util = require("../shared/util.js");
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31 |
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32 | var _base_stream = require("./base_stream.js");
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33 |
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34 | var _colorspace = require("./colorspace.js");
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35 |
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36 | var _core_utils = require("./core_utils.js");
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37 |
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38 | const ShadingType = {
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39 | FUNCTION_BASED: 1,
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40 | AXIAL: 2,
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41 | RADIAL: 3,
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42 | FREE_FORM_MESH: 4,
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43 | LATTICE_FORM_MESH: 5,
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44 | COONS_PATCH_MESH: 6,
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45 | TENSOR_PATCH_MESH: 7
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46 | };
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47 |
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48 | class Pattern {
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49 | constructor() {
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50 | (0, _util.unreachable)("Cannot initialize Pattern.");
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51 | }
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52 |
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53 | static parseShading(shading, xref, res, handler, pdfFunctionFactory, localColorSpaceCache) {
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54 | const dict = shading instanceof _base_stream.BaseStream ? shading.dict : shading;
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55 | const type = dict.get("ShadingType");
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56 |
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57 | try {
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58 | switch (type) {
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59 | case ShadingType.AXIAL:
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60 | case ShadingType.RADIAL:
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61 | return new RadialAxialShading(dict, xref, res, pdfFunctionFactory, localColorSpaceCache);
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62 |
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63 | case ShadingType.FREE_FORM_MESH:
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64 | case ShadingType.LATTICE_FORM_MESH:
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65 | case ShadingType.COONS_PATCH_MESH:
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66 | case ShadingType.TENSOR_PATCH_MESH:
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67 | return new MeshShading(shading, xref, res, pdfFunctionFactory, localColorSpaceCache);
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68 |
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69 | default:
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70 | throw new _util.FormatError("Unsupported ShadingType: " + type);
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71 | }
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72 | } catch (ex) {
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73 | if (ex instanceof _core_utils.MissingDataException) {
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74 | throw ex;
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75 | }
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76 |
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77 | handler.send("UnsupportedFeature", {
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78 | featureId: _util.UNSUPPORTED_FEATURES.shadingPattern
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79 | });
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80 | (0, _util.warn)(ex);
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81 | return new DummyShading();
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82 | }
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83 | }
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84 |
|
85 | }
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86 |
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87 | exports.Pattern = Pattern;
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88 |
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89 | class BaseShading {
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90 | static get SMALL_NUMBER() {
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91 | return (0, _util.shadow)(this, "SMALL_NUMBER", 1e-6);
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92 | }
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93 |
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94 | constructor() {
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95 | if (this.constructor === BaseShading) {
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96 | (0, _util.unreachable)("Cannot initialize BaseShading.");
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97 | }
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98 | }
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99 |
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100 | getIR() {
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101 | (0, _util.unreachable)("Abstract method `getIR` called.");
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102 | }
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103 |
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104 | }
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105 |
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106 | class RadialAxialShading extends BaseShading {
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107 | constructor(dict, xref, resources, pdfFunctionFactory, localColorSpaceCache) {
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108 | super();
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109 | this.coordsArr = dict.getArray("Coords");
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110 | this.shadingType = dict.get("ShadingType");
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111 |
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112 | const cs = _colorspace.ColorSpace.parse({
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113 | cs: dict.getRaw("CS") || dict.getRaw("ColorSpace"),
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114 | xref,
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115 | resources,
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116 | pdfFunctionFactory,
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117 | localColorSpaceCache
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118 | });
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119 |
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120 | const bbox = dict.getArray("BBox");
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121 |
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122 | if (Array.isArray(bbox) && bbox.length === 4) {
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123 | this.bbox = _util.Util.normalizeRect(bbox);
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124 | } else {
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125 | this.bbox = null;
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126 | }
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127 |
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128 | let t0 = 0.0,
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129 | t1 = 1.0;
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130 |
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131 | if (dict.has("Domain")) {
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132 | const domainArr = dict.getArray("Domain");
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133 | t0 = domainArr[0];
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134 | t1 = domainArr[1];
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135 | }
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136 |
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137 | let extendStart = false,
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138 | extendEnd = false;
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139 |
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140 | if (dict.has("Extend")) {
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141 | const extendArr = dict.getArray("Extend");
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142 | extendStart = extendArr[0];
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143 | extendEnd = extendArr[1];
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144 | }
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145 |
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146 | if (this.shadingType === ShadingType.RADIAL && (!extendStart || !extendEnd)) {
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147 | const [x1, y1, r1, x2, y2, r2] = this.coordsArr;
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148 | const distance = Math.hypot(x1 - x2, y1 - y2);
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149 |
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150 | if (r1 <= r2 + distance && r2 <= r1 + distance) {
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151 | (0, _util.warn)("Unsupported radial gradient.");
|
152 | }
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153 | }
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154 |
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155 | this.extendStart = extendStart;
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156 | this.extendEnd = extendEnd;
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157 | const fnObj = dict.getRaw("Function");
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158 | const fn = pdfFunctionFactory.createFromArray(fnObj);
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159 | const NUMBER_OF_SAMPLES = 10;
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160 | const step = (t1 - t0) / NUMBER_OF_SAMPLES;
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161 | const colorStops = this.colorStops = [];
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162 |
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163 | if (t0 >= t1 || step <= 0) {
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164 | (0, _util.info)("Bad shading domain.");
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165 | return;
|
166 | }
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167 |
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168 | const color = new Float32Array(cs.numComps),
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169 | ratio = new Float32Array(1);
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170 | let rgbColor;
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171 |
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172 | for (let i = 0; i <= NUMBER_OF_SAMPLES; i++) {
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173 | ratio[0] = t0 + i * step;
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174 | fn(ratio, 0, color, 0);
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175 | rgbColor = cs.getRgb(color, 0);
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176 |
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177 | const cssColor = _util.Util.makeHexColor(rgbColor[0], rgbColor[1], rgbColor[2]);
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178 |
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179 | colorStops.push([i / NUMBER_OF_SAMPLES, cssColor]);
|
180 | }
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181 |
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182 | let background = "transparent";
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183 |
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184 | if (dict.has("Background")) {
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185 | rgbColor = cs.getRgb(dict.get("Background"), 0);
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186 | background = _util.Util.makeHexColor(rgbColor[0], rgbColor[1], rgbColor[2]);
|
187 | }
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188 |
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189 | if (!extendStart) {
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190 | colorStops.unshift([0, background]);
|
191 | colorStops[1][0] += BaseShading.SMALL_NUMBER;
|
192 | }
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193 |
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194 | if (!extendEnd) {
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195 | colorStops.at(-1)[0] -= BaseShading.SMALL_NUMBER;
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196 | colorStops.push([1, background]);
|
197 | }
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198 |
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199 | this.colorStops = colorStops;
|
200 | }
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201 |
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202 | getIR() {
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203 | const coordsArr = this.coordsArr;
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204 | const shadingType = this.shadingType;
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205 | let type, p0, p1, r0, r1;
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206 |
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207 | if (shadingType === ShadingType.AXIAL) {
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208 | p0 = [coordsArr[0], coordsArr[1]];
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209 | p1 = [coordsArr[2], coordsArr[3]];
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210 | r0 = null;
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211 | r1 = null;
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212 | type = "axial";
|
213 | } else if (shadingType === ShadingType.RADIAL) {
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214 | p0 = [coordsArr[0], coordsArr[1]];
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215 | p1 = [coordsArr[3], coordsArr[4]];
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216 | r0 = coordsArr[2];
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217 | r1 = coordsArr[5];
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218 | type = "radial";
|
219 | } else {
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220 | (0, _util.unreachable)(`getPattern type unknown: ${shadingType}`);
|
221 | }
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222 |
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223 | return ["RadialAxial", type, this.bbox, this.colorStops, p0, p1, r0, r1];
|
224 | }
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225 |
|
226 | }
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227 |
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228 | class MeshStreamReader {
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229 | constructor(stream, context) {
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230 | this.stream = stream;
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231 | this.context = context;
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232 | this.buffer = 0;
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233 | this.bufferLength = 0;
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234 | const numComps = context.numComps;
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235 | this.tmpCompsBuf = new Float32Array(numComps);
|
236 | const csNumComps = context.colorSpace.numComps;
|
237 | this.tmpCsCompsBuf = context.colorFn ? new Float32Array(csNumComps) : this.tmpCompsBuf;
|
238 | }
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239 |
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240 | get hasData() {
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241 | if (this.stream.end) {
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242 | return this.stream.pos < this.stream.end;
|
243 | }
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244 |
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245 | if (this.bufferLength > 0) {
|
246 | return true;
|
247 | }
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248 |
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249 | const nextByte = this.stream.getByte();
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250 |
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251 | if (nextByte < 0) {
|
252 | return false;
|
253 | }
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254 |
|
255 | this.buffer = nextByte;
|
256 | this.bufferLength = 8;
|
257 | return true;
|
258 | }
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259 |
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260 | readBits(n) {
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261 | let buffer = this.buffer;
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262 | let bufferLength = this.bufferLength;
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263 |
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264 | if (n === 32) {
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265 | if (bufferLength === 0) {
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266 | return (this.stream.getByte() << 24 | this.stream.getByte() << 16 | this.stream.getByte() << 8 | this.stream.getByte()) >>> 0;
|
267 | }
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268 |
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269 | buffer = buffer << 24 | this.stream.getByte() << 16 | this.stream.getByte() << 8 | this.stream.getByte();
|
270 | const nextByte = this.stream.getByte();
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271 | this.buffer = nextByte & (1 << bufferLength) - 1;
|
272 | return (buffer << 8 - bufferLength | (nextByte & 0xff) >> bufferLength) >>> 0;
|
273 | }
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274 |
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275 | if (n === 8 && bufferLength === 0) {
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276 | return this.stream.getByte();
|
277 | }
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278 |
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279 | while (bufferLength < n) {
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280 | buffer = buffer << 8 | this.stream.getByte();
|
281 | bufferLength += 8;
|
282 | }
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283 |
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284 | bufferLength -= n;
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285 | this.bufferLength = bufferLength;
|
286 | this.buffer = buffer & (1 << bufferLength) - 1;
|
287 | return buffer >> bufferLength;
|
288 | }
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289 |
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290 | align() {
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291 | this.buffer = 0;
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292 | this.bufferLength = 0;
|
293 | }
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294 |
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295 | readFlag() {
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296 | return this.readBits(this.context.bitsPerFlag);
|
297 | }
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298 |
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299 | readCoordinate() {
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300 | const bitsPerCoordinate = this.context.bitsPerCoordinate;
|
301 | const xi = this.readBits(bitsPerCoordinate);
|
302 | const yi = this.readBits(bitsPerCoordinate);
|
303 | const decode = this.context.decode;
|
304 | const scale = bitsPerCoordinate < 32 ? 1 / ((1 << bitsPerCoordinate) - 1) : 2.3283064365386963e-10;
|
305 | return [xi * scale * (decode[1] - decode[0]) + decode[0], yi * scale * (decode[3] - decode[2]) + decode[2]];
|
306 | }
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307 |
|
308 | readComponents() {
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309 | const numComps = this.context.numComps;
|
310 | const bitsPerComponent = this.context.bitsPerComponent;
|
311 | const scale = bitsPerComponent < 32 ? 1 / ((1 << bitsPerComponent) - 1) : 2.3283064365386963e-10;
|
312 | const decode = this.context.decode;
|
313 | const components = this.tmpCompsBuf;
|
314 |
|
315 | for (let i = 0, j = 4; i < numComps; i++, j += 2) {
|
316 | const ci = this.readBits(bitsPerComponent);
|
317 | components[i] = ci * scale * (decode[j + 1] - decode[j]) + decode[j];
|
318 | }
|
319 |
|
320 | const color = this.tmpCsCompsBuf;
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321 |
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322 | if (this.context.colorFn) {
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323 | this.context.colorFn(components, 0, color, 0);
|
324 | }
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325 |
|
326 | return this.context.colorSpace.getRgb(color, 0);
|
327 | }
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328 |
|
329 | }
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330 |
|
331 | const getB = function getBClosure() {
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332 | function buildB(count) {
|
333 | const lut = [];
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334 |
|
335 | for (let i = 0; i <= count; i++) {
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336 | const t = i / count,
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337 | t_ = 1 - t;
|
338 | lut.push(new Float32Array([t_ * t_ * t_, 3 * t * t_ * t_, 3 * t * t * t_, t * t * t]));
|
339 | }
|
340 |
|
341 | return lut;
|
342 | }
|
343 |
|
344 | const cache = [];
|
345 | return function (count) {
|
346 | if (!cache[count]) {
|
347 | cache[count] = buildB(count);
|
348 | }
|
349 |
|
350 | return cache[count];
|
351 | };
|
352 | }();
|
353 |
|
354 | class MeshShading extends BaseShading {
|
355 | static get MIN_SPLIT_PATCH_CHUNKS_AMOUNT() {
|
356 | return (0, _util.shadow)(this, "MIN_SPLIT_PATCH_CHUNKS_AMOUNT", 3);
|
357 | }
|
358 |
|
359 | static get MAX_SPLIT_PATCH_CHUNKS_AMOUNT() {
|
360 | return (0, _util.shadow)(this, "MAX_SPLIT_PATCH_CHUNKS_AMOUNT", 20);
|
361 | }
|
362 |
|
363 | static get TRIANGLE_DENSITY() {
|
364 | return (0, _util.shadow)(this, "TRIANGLE_DENSITY", 20);
|
365 | }
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366 |
|
367 | constructor(stream, xref, resources, pdfFunctionFactory, localColorSpaceCache) {
|
368 | super();
|
369 |
|
370 | if (!(stream instanceof _base_stream.BaseStream)) {
|
371 | throw new _util.FormatError("Mesh data is not a stream");
|
372 | }
|
373 |
|
374 | const dict = stream.dict;
|
375 | this.shadingType = dict.get("ShadingType");
|
376 | const bbox = dict.getArray("BBox");
|
377 |
|
378 | if (Array.isArray(bbox) && bbox.length === 4) {
|
379 | this.bbox = _util.Util.normalizeRect(bbox);
|
380 | } else {
|
381 | this.bbox = null;
|
382 | }
|
383 |
|
384 | const cs = _colorspace.ColorSpace.parse({
|
385 | cs: dict.getRaw("CS") || dict.getRaw("ColorSpace"),
|
386 | xref,
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387 | resources,
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388 | pdfFunctionFactory,
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389 | localColorSpaceCache
|
390 | });
|
391 |
|
392 | this.background = dict.has("Background") ? cs.getRgb(dict.get("Background"), 0) : null;
|
393 | const fnObj = dict.getRaw("Function");
|
394 | const fn = fnObj ? pdfFunctionFactory.createFromArray(fnObj) : null;
|
395 | this.coords = [];
|
396 | this.colors = [];
|
397 | this.figures = [];
|
398 | const decodeContext = {
|
399 | bitsPerCoordinate: dict.get("BitsPerCoordinate"),
|
400 | bitsPerComponent: dict.get("BitsPerComponent"),
|
401 | bitsPerFlag: dict.get("BitsPerFlag"),
|
402 | decode: dict.getArray("Decode"),
|
403 | colorFn: fn,
|
404 | colorSpace: cs,
|
405 | numComps: fn ? 1 : cs.numComps
|
406 | };
|
407 | const reader = new MeshStreamReader(stream, decodeContext);
|
408 | let patchMesh = false;
|
409 |
|
410 | switch (this.shadingType) {
|
411 | case ShadingType.FREE_FORM_MESH:
|
412 | this._decodeType4Shading(reader);
|
413 |
|
414 | break;
|
415 |
|
416 | case ShadingType.LATTICE_FORM_MESH:
|
417 | const verticesPerRow = dict.get("VerticesPerRow") | 0;
|
418 |
|
419 | if (verticesPerRow < 2) {
|
420 | throw new _util.FormatError("Invalid VerticesPerRow");
|
421 | }
|
422 |
|
423 | this._decodeType5Shading(reader, verticesPerRow);
|
424 |
|
425 | break;
|
426 |
|
427 | case ShadingType.COONS_PATCH_MESH:
|
428 | this._decodeType6Shading(reader);
|
429 |
|
430 | patchMesh = true;
|
431 | break;
|
432 |
|
433 | case ShadingType.TENSOR_PATCH_MESH:
|
434 | this._decodeType7Shading(reader);
|
435 |
|
436 | patchMesh = true;
|
437 | break;
|
438 |
|
439 | default:
|
440 | (0, _util.unreachable)("Unsupported mesh type.");
|
441 | break;
|
442 | }
|
443 |
|
444 | if (patchMesh) {
|
445 | this._updateBounds();
|
446 |
|
447 | for (let i = 0, ii = this.figures.length; i < ii; i++) {
|
448 | this._buildFigureFromPatch(i);
|
449 | }
|
450 | }
|
451 |
|
452 | this._updateBounds();
|
453 |
|
454 | this._packData();
|
455 | }
|
456 |
|
457 | _decodeType4Shading(reader) {
|
458 | const coords = this.coords;
|
459 | const colors = this.colors;
|
460 | const operators = [];
|
461 | const ps = [];
|
462 | let verticesLeft = 0;
|
463 |
|
464 | while (reader.hasData) {
|
465 | const f = reader.readFlag();
|
466 | const coord = reader.readCoordinate();
|
467 | const color = reader.readComponents();
|
468 |
|
469 | if (verticesLeft === 0) {
|
470 | if (!(0 <= f && f <= 2)) {
|
471 | throw new _util.FormatError("Unknown type4 flag");
|
472 | }
|
473 |
|
474 | switch (f) {
|
475 | case 0:
|
476 | verticesLeft = 3;
|
477 | break;
|
478 |
|
479 | case 1:
|
480 | ps.push(ps.at(-2), ps.at(-1));
|
481 | verticesLeft = 1;
|
482 | break;
|
483 |
|
484 | case 2:
|
485 | ps.push(ps.at(-3), ps.at(-1));
|
486 | verticesLeft = 1;
|
487 | break;
|
488 | }
|
489 |
|
490 | operators.push(f);
|
491 | }
|
492 |
|
493 | ps.push(coords.length);
|
494 | coords.push(coord);
|
495 | colors.push(color);
|
496 | verticesLeft--;
|
497 | reader.align();
|
498 | }
|
499 |
|
500 | this.figures.push({
|
501 | type: "triangles",
|
502 | coords: new Int32Array(ps),
|
503 | colors: new Int32Array(ps)
|
504 | });
|
505 | }
|
506 |
|
507 | _decodeType5Shading(reader, verticesPerRow) {
|
508 | const coords = this.coords;
|
509 | const colors = this.colors;
|
510 | const ps = [];
|
511 |
|
512 | while (reader.hasData) {
|
513 | const coord = reader.readCoordinate();
|
514 | const color = reader.readComponents();
|
515 | ps.push(coords.length);
|
516 | coords.push(coord);
|
517 | colors.push(color);
|
518 | }
|
519 |
|
520 | this.figures.push({
|
521 | type: "lattice",
|
522 | coords: new Int32Array(ps),
|
523 | colors: new Int32Array(ps),
|
524 | verticesPerRow
|
525 | });
|
526 | }
|
527 |
|
528 | _decodeType6Shading(reader) {
|
529 | const coords = this.coords;
|
530 | const colors = this.colors;
|
531 | const ps = new Int32Array(16);
|
532 | const cs = new Int32Array(4);
|
533 |
|
534 | while (reader.hasData) {
|
535 | const f = reader.readFlag();
|
536 |
|
537 | if (!(0 <= f && f <= 3)) {
|
538 | throw new _util.FormatError("Unknown type6 flag");
|
539 | }
|
540 |
|
541 | const pi = coords.length;
|
542 |
|
543 | for (let i = 0, ii = f !== 0 ? 8 : 12; i < ii; i++) {
|
544 | coords.push(reader.readCoordinate());
|
545 | }
|
546 |
|
547 | const ci = colors.length;
|
548 |
|
549 | for (let i = 0, ii = f !== 0 ? 2 : 4; i < ii; i++) {
|
550 | colors.push(reader.readComponents());
|
551 | }
|
552 |
|
553 | let tmp1, tmp2, tmp3, tmp4;
|
554 |
|
555 | switch (f) {
|
556 | case 0:
|
557 | ps[12] = pi + 3;
|
558 | ps[13] = pi + 4;
|
559 | ps[14] = pi + 5;
|
560 | ps[15] = pi + 6;
|
561 | ps[8] = pi + 2;
|
562 | ps[11] = pi + 7;
|
563 | ps[4] = pi + 1;
|
564 | ps[7] = pi + 8;
|
565 | ps[0] = pi;
|
566 | ps[1] = pi + 11;
|
567 | ps[2] = pi + 10;
|
568 | ps[3] = pi + 9;
|
569 | cs[2] = ci + 1;
|
570 | cs[3] = ci + 2;
|
571 | cs[0] = ci;
|
572 | cs[1] = ci + 3;
|
573 | break;
|
574 |
|
575 | case 1:
|
576 | tmp1 = ps[12];
|
577 | tmp2 = ps[13];
|
578 | tmp3 = ps[14];
|
579 | tmp4 = ps[15];
|
580 | ps[12] = tmp4;
|
581 | ps[13] = pi + 0;
|
582 | ps[14] = pi + 1;
|
583 | ps[15] = pi + 2;
|
584 | ps[8] = tmp3;
|
585 | ps[11] = pi + 3;
|
586 | ps[4] = tmp2;
|
587 | ps[7] = pi + 4;
|
588 | ps[0] = tmp1;
|
589 | ps[1] = pi + 7;
|
590 | ps[2] = pi + 6;
|
591 | ps[3] = pi + 5;
|
592 | tmp1 = cs[2];
|
593 | tmp2 = cs[3];
|
594 | cs[2] = tmp2;
|
595 | cs[3] = ci;
|
596 | cs[0] = tmp1;
|
597 | cs[1] = ci + 1;
|
598 | break;
|
599 |
|
600 | case 2:
|
601 | tmp1 = ps[15];
|
602 | tmp2 = ps[11];
|
603 | ps[12] = ps[3];
|
604 | ps[13] = pi + 0;
|
605 | ps[14] = pi + 1;
|
606 | ps[15] = pi + 2;
|
607 | ps[8] = ps[7];
|
608 | ps[11] = pi + 3;
|
609 | ps[4] = tmp2;
|
610 | ps[7] = pi + 4;
|
611 | ps[0] = tmp1;
|
612 | ps[1] = pi + 7;
|
613 | ps[2] = pi + 6;
|
614 | ps[3] = pi + 5;
|
615 | tmp1 = cs[3];
|
616 | cs[2] = cs[1];
|
617 | cs[3] = ci;
|
618 | cs[0] = tmp1;
|
619 | cs[1] = ci + 1;
|
620 | break;
|
621 |
|
622 | case 3:
|
623 | ps[12] = ps[0];
|
624 | ps[13] = pi + 0;
|
625 | ps[14] = pi + 1;
|
626 | ps[15] = pi + 2;
|
627 | ps[8] = ps[1];
|
628 | ps[11] = pi + 3;
|
629 | ps[4] = ps[2];
|
630 | ps[7] = pi + 4;
|
631 | ps[0] = ps[3];
|
632 | ps[1] = pi + 7;
|
633 | ps[2] = pi + 6;
|
634 | ps[3] = pi + 5;
|
635 | cs[2] = cs[0];
|
636 | cs[3] = ci;
|
637 | cs[0] = cs[1];
|
638 | cs[1] = ci + 1;
|
639 | break;
|
640 | }
|
641 |
|
642 | ps[5] = coords.length;
|
643 | coords.push([(-4 * coords[ps[0]][0] - coords[ps[15]][0] + 6 * (coords[ps[4]][0] + coords[ps[1]][0]) - 2 * (coords[ps[12]][0] + coords[ps[3]][0]) + 3 * (coords[ps[13]][0] + coords[ps[7]][0])) / 9, (-4 * coords[ps[0]][1] - coords[ps[15]][1] + 6 * (coords[ps[4]][1] + coords[ps[1]][1]) - 2 * (coords[ps[12]][1] + coords[ps[3]][1]) + 3 * (coords[ps[13]][1] + coords[ps[7]][1])) / 9]);
|
644 | ps[6] = coords.length;
|
645 | coords.push([(-4 * coords[ps[3]][0] - coords[ps[12]][0] + 6 * (coords[ps[2]][0] + coords[ps[7]][0]) - 2 * (coords[ps[0]][0] + coords[ps[15]][0]) + 3 * (coords[ps[4]][0] + coords[ps[14]][0])) / 9, (-4 * coords[ps[3]][1] - coords[ps[12]][1] + 6 * (coords[ps[2]][1] + coords[ps[7]][1]) - 2 * (coords[ps[0]][1] + coords[ps[15]][1]) + 3 * (coords[ps[4]][1] + coords[ps[14]][1])) / 9]);
|
646 | ps[9] = coords.length;
|
647 | coords.push([(-4 * coords[ps[12]][0] - coords[ps[3]][0] + 6 * (coords[ps[8]][0] + coords[ps[13]][0]) - 2 * (coords[ps[0]][0] + coords[ps[15]][0]) + 3 * (coords[ps[11]][0] + coords[ps[1]][0])) / 9, (-4 * coords[ps[12]][1] - coords[ps[3]][1] + 6 * (coords[ps[8]][1] + coords[ps[13]][1]) - 2 * (coords[ps[0]][1] + coords[ps[15]][1]) + 3 * (coords[ps[11]][1] + coords[ps[1]][1])) / 9]);
|
648 | ps[10] = coords.length;
|
649 | coords.push([(-4 * coords[ps[15]][0] - coords[ps[0]][0] + 6 * (coords[ps[11]][0] + coords[ps[14]][0]) - 2 * (coords[ps[12]][0] + coords[ps[3]][0]) + 3 * (coords[ps[2]][0] + coords[ps[8]][0])) / 9, (-4 * coords[ps[15]][1] - coords[ps[0]][1] + 6 * (coords[ps[11]][1] + coords[ps[14]][1]) - 2 * (coords[ps[12]][1] + coords[ps[3]][1]) + 3 * (coords[ps[2]][1] + coords[ps[8]][1])) / 9]);
|
650 | this.figures.push({
|
651 | type: "patch",
|
652 | coords: new Int32Array(ps),
|
653 | colors: new Int32Array(cs)
|
654 | });
|
655 | }
|
656 | }
|
657 |
|
658 | _decodeType7Shading(reader) {
|
659 | const coords = this.coords;
|
660 | const colors = this.colors;
|
661 | const ps = new Int32Array(16);
|
662 | const cs = new Int32Array(4);
|
663 |
|
664 | while (reader.hasData) {
|
665 | const f = reader.readFlag();
|
666 |
|
667 | if (!(0 <= f && f <= 3)) {
|
668 | throw new _util.FormatError("Unknown type7 flag");
|
669 | }
|
670 |
|
671 | const pi = coords.length;
|
672 |
|
673 | for (let i = 0, ii = f !== 0 ? 12 : 16; i < ii; i++) {
|
674 | coords.push(reader.readCoordinate());
|
675 | }
|
676 |
|
677 | const ci = colors.length;
|
678 |
|
679 | for (let i = 0, ii = f !== 0 ? 2 : 4; i < ii; i++) {
|
680 | colors.push(reader.readComponents());
|
681 | }
|
682 |
|
683 | let tmp1, tmp2, tmp3, tmp4;
|
684 |
|
685 | switch (f) {
|
686 | case 0:
|
687 | ps[12] = pi + 3;
|
688 | ps[13] = pi + 4;
|
689 | ps[14] = pi + 5;
|
690 | ps[15] = pi + 6;
|
691 | ps[8] = pi + 2;
|
692 | ps[9] = pi + 13;
|
693 | ps[10] = pi + 14;
|
694 | ps[11] = pi + 7;
|
695 | ps[4] = pi + 1;
|
696 | ps[5] = pi + 12;
|
697 | ps[6] = pi + 15;
|
698 | ps[7] = pi + 8;
|
699 | ps[0] = pi;
|
700 | ps[1] = pi + 11;
|
701 | ps[2] = pi + 10;
|
702 | ps[3] = pi + 9;
|
703 | cs[2] = ci + 1;
|
704 | cs[3] = ci + 2;
|
705 | cs[0] = ci;
|
706 | cs[1] = ci + 3;
|
707 | break;
|
708 |
|
709 | case 1:
|
710 | tmp1 = ps[12];
|
711 | tmp2 = ps[13];
|
712 | tmp3 = ps[14];
|
713 | tmp4 = ps[15];
|
714 | ps[12] = tmp4;
|
715 | ps[13] = pi + 0;
|
716 | ps[14] = pi + 1;
|
717 | ps[15] = pi + 2;
|
718 | ps[8] = tmp3;
|
719 | ps[9] = pi + 9;
|
720 | ps[10] = pi + 10;
|
721 | ps[11] = pi + 3;
|
722 | ps[4] = tmp2;
|
723 | ps[5] = pi + 8;
|
724 | ps[6] = pi + 11;
|
725 | ps[7] = pi + 4;
|
726 | ps[0] = tmp1;
|
727 | ps[1] = pi + 7;
|
728 | ps[2] = pi + 6;
|
729 | ps[3] = pi + 5;
|
730 | tmp1 = cs[2];
|
731 | tmp2 = cs[3];
|
732 | cs[2] = tmp2;
|
733 | cs[3] = ci;
|
734 | cs[0] = tmp1;
|
735 | cs[1] = ci + 1;
|
736 | break;
|
737 |
|
738 | case 2:
|
739 | tmp1 = ps[15];
|
740 | tmp2 = ps[11];
|
741 | ps[12] = ps[3];
|
742 | ps[13] = pi + 0;
|
743 | ps[14] = pi + 1;
|
744 | ps[15] = pi + 2;
|
745 | ps[8] = ps[7];
|
746 | ps[9] = pi + 9;
|
747 | ps[10] = pi + 10;
|
748 | ps[11] = pi + 3;
|
749 | ps[4] = tmp2;
|
750 | ps[5] = pi + 8;
|
751 | ps[6] = pi + 11;
|
752 | ps[7] = pi + 4;
|
753 | ps[0] = tmp1;
|
754 | ps[1] = pi + 7;
|
755 | ps[2] = pi + 6;
|
756 | ps[3] = pi + 5;
|
757 | tmp1 = cs[3];
|
758 | cs[2] = cs[1];
|
759 | cs[3] = ci;
|
760 | cs[0] = tmp1;
|
761 | cs[1] = ci + 1;
|
762 | break;
|
763 |
|
764 | case 3:
|
765 | ps[12] = ps[0];
|
766 | ps[13] = pi + 0;
|
767 | ps[14] = pi + 1;
|
768 | ps[15] = pi + 2;
|
769 | ps[8] = ps[1];
|
770 | ps[9] = pi + 9;
|
771 | ps[10] = pi + 10;
|
772 | ps[11] = pi + 3;
|
773 | ps[4] = ps[2];
|
774 | ps[5] = pi + 8;
|
775 | ps[6] = pi + 11;
|
776 | ps[7] = pi + 4;
|
777 | ps[0] = ps[3];
|
778 | ps[1] = pi + 7;
|
779 | ps[2] = pi + 6;
|
780 | ps[3] = pi + 5;
|
781 | cs[2] = cs[0];
|
782 | cs[3] = ci;
|
783 | cs[0] = cs[1];
|
784 | cs[1] = ci + 1;
|
785 | break;
|
786 | }
|
787 |
|
788 | this.figures.push({
|
789 | type: "patch",
|
790 | coords: new Int32Array(ps),
|
791 | colors: new Int32Array(cs)
|
792 | });
|
793 | }
|
794 | }
|
795 |
|
796 | _buildFigureFromPatch(index) {
|
797 | const figure = this.figures[index];
|
798 | (0, _util.assert)(figure.type === "patch", "Unexpected patch mesh figure");
|
799 | const coords = this.coords,
|
800 | colors = this.colors;
|
801 | const pi = figure.coords;
|
802 | const ci = figure.colors;
|
803 | const figureMinX = Math.min(coords[pi[0]][0], coords[pi[3]][0], coords[pi[12]][0], coords[pi[15]][0]);
|
804 | const figureMinY = Math.min(coords[pi[0]][1], coords[pi[3]][1], coords[pi[12]][1], coords[pi[15]][1]);
|
805 | const figureMaxX = Math.max(coords[pi[0]][0], coords[pi[3]][0], coords[pi[12]][0], coords[pi[15]][0]);
|
806 | const figureMaxY = Math.max(coords[pi[0]][1], coords[pi[3]][1], coords[pi[12]][1], coords[pi[15]][1]);
|
807 | let splitXBy = Math.ceil((figureMaxX - figureMinX) * MeshShading.TRIANGLE_DENSITY / (this.bounds[2] - this.bounds[0]));
|
808 | splitXBy = Math.max(MeshShading.MIN_SPLIT_PATCH_CHUNKS_AMOUNT, Math.min(MeshShading.MAX_SPLIT_PATCH_CHUNKS_AMOUNT, splitXBy));
|
809 | let splitYBy = Math.ceil((figureMaxY - figureMinY) * MeshShading.TRIANGLE_DENSITY / (this.bounds[3] - this.bounds[1]));
|
810 | splitYBy = Math.max(MeshShading.MIN_SPLIT_PATCH_CHUNKS_AMOUNT, Math.min(MeshShading.MAX_SPLIT_PATCH_CHUNKS_AMOUNT, splitYBy));
|
811 | const verticesPerRow = splitXBy + 1;
|
812 | const figureCoords = new Int32Array((splitYBy + 1) * verticesPerRow);
|
813 | const figureColors = new Int32Array((splitYBy + 1) * verticesPerRow);
|
814 | let k = 0;
|
815 | const cl = new Uint8Array(3),
|
816 | cr = new Uint8Array(3);
|
817 | const c0 = colors[ci[0]],
|
818 | c1 = colors[ci[1]],
|
819 | c2 = colors[ci[2]],
|
820 | c3 = colors[ci[3]];
|
821 | const bRow = getB(splitYBy),
|
822 | bCol = getB(splitXBy);
|
823 |
|
824 | for (let row = 0; row <= splitYBy; row++) {
|
825 | cl[0] = (c0[0] * (splitYBy - row) + c2[0] * row) / splitYBy | 0;
|
826 | cl[1] = (c0[1] * (splitYBy - row) + c2[1] * row) / splitYBy | 0;
|
827 | cl[2] = (c0[2] * (splitYBy - row) + c2[2] * row) / splitYBy | 0;
|
828 | cr[0] = (c1[0] * (splitYBy - row) + c3[0] * row) / splitYBy | 0;
|
829 | cr[1] = (c1[1] * (splitYBy - row) + c3[1] * row) / splitYBy | 0;
|
830 | cr[2] = (c1[2] * (splitYBy - row) + c3[2] * row) / splitYBy | 0;
|
831 |
|
832 | for (let col = 0; col <= splitXBy; col++, k++) {
|
833 | if ((row === 0 || row === splitYBy) && (col === 0 || col === splitXBy)) {
|
834 | continue;
|
835 | }
|
836 |
|
837 | let x = 0,
|
838 | y = 0;
|
839 | let q = 0;
|
840 |
|
841 | for (let i = 0; i <= 3; i++) {
|
842 | for (let j = 0; j <= 3; j++, q++) {
|
843 | const m = bRow[row][i] * bCol[col][j];
|
844 | x += coords[pi[q]][0] * m;
|
845 | y += coords[pi[q]][1] * m;
|
846 | }
|
847 | }
|
848 |
|
849 | figureCoords[k] = coords.length;
|
850 | coords.push([x, y]);
|
851 | figureColors[k] = colors.length;
|
852 | const newColor = new Uint8Array(3);
|
853 | newColor[0] = (cl[0] * (splitXBy - col) + cr[0] * col) / splitXBy | 0;
|
854 | newColor[1] = (cl[1] * (splitXBy - col) + cr[1] * col) / splitXBy | 0;
|
855 | newColor[2] = (cl[2] * (splitXBy - col) + cr[2] * col) / splitXBy | 0;
|
856 | colors.push(newColor);
|
857 | }
|
858 | }
|
859 |
|
860 | figureCoords[0] = pi[0];
|
861 | figureColors[0] = ci[0];
|
862 | figureCoords[splitXBy] = pi[3];
|
863 | figureColors[splitXBy] = ci[1];
|
864 | figureCoords[verticesPerRow * splitYBy] = pi[12];
|
865 | figureColors[verticesPerRow * splitYBy] = ci[2];
|
866 | figureCoords[verticesPerRow * splitYBy + splitXBy] = pi[15];
|
867 | figureColors[verticesPerRow * splitYBy + splitXBy] = ci[3];
|
868 | this.figures[index] = {
|
869 | type: "lattice",
|
870 | coords: figureCoords,
|
871 | colors: figureColors,
|
872 | verticesPerRow
|
873 | };
|
874 | }
|
875 |
|
876 | _updateBounds() {
|
877 | let minX = this.coords[0][0],
|
878 | minY = this.coords[0][1],
|
879 | maxX = minX,
|
880 | maxY = minY;
|
881 |
|
882 | for (let i = 1, ii = this.coords.length; i < ii; i++) {
|
883 | const x = this.coords[i][0],
|
884 | y = this.coords[i][1];
|
885 | minX = minX > x ? x : minX;
|
886 | minY = minY > y ? y : minY;
|
887 | maxX = maxX < x ? x : maxX;
|
888 | maxY = maxY < y ? y : maxY;
|
889 | }
|
890 |
|
891 | this.bounds = [minX, minY, maxX, maxY];
|
892 | }
|
893 |
|
894 | _packData() {
|
895 | let i, ii, j, jj;
|
896 | const coords = this.coords;
|
897 | const coordsPacked = new Float32Array(coords.length * 2);
|
898 |
|
899 | for (i = 0, j = 0, ii = coords.length; i < ii; i++) {
|
900 | const xy = coords[i];
|
901 | coordsPacked[j++] = xy[0];
|
902 | coordsPacked[j++] = xy[1];
|
903 | }
|
904 |
|
905 | this.coords = coordsPacked;
|
906 | const colors = this.colors;
|
907 | const colorsPacked = new Uint8Array(colors.length * 3);
|
908 |
|
909 | for (i = 0, j = 0, ii = colors.length; i < ii; i++) {
|
910 | const c = colors[i];
|
911 | colorsPacked[j++] = c[0];
|
912 | colorsPacked[j++] = c[1];
|
913 | colorsPacked[j++] = c[2];
|
914 | }
|
915 |
|
916 | this.colors = colorsPacked;
|
917 | const figures = this.figures;
|
918 |
|
919 | for (i = 0, ii = figures.length; i < ii; i++) {
|
920 | const figure = figures[i],
|
921 | ps = figure.coords,
|
922 | cs = figure.colors;
|
923 |
|
924 | for (j = 0, jj = ps.length; j < jj; j++) {
|
925 | ps[j] *= 2;
|
926 | cs[j] *= 3;
|
927 | }
|
928 | }
|
929 | }
|
930 |
|
931 | getIR() {
|
932 | return ["Mesh", this.shadingType, this.coords, this.colors, this.figures, this.bounds, this.bbox, this.background];
|
933 | }
|
934 |
|
935 | }
|
936 |
|
937 | class DummyShading extends BaseShading {
|
938 | getIR() {
|
939 | return ["Dummy"];
|
940 | }
|
941 |
|
942 | }
|
943 |
|
944 | function getTilingPatternIR(operatorList, dict, color) {
|
945 | const matrix = dict.getArray("Matrix");
|
946 |
|
947 | const bbox = _util.Util.normalizeRect(dict.getArray("BBox"));
|
948 |
|
949 | const xstep = dict.get("XStep");
|
950 | const ystep = dict.get("YStep");
|
951 | const paintType = dict.get("PaintType");
|
952 | const tilingType = dict.get("TilingType");
|
953 |
|
954 | if (bbox[2] - bbox[0] === 0 || bbox[3] - bbox[1] === 0) {
|
955 | throw new _util.FormatError(`Invalid getTilingPatternIR /BBox array: [${bbox}].`);
|
956 | }
|
957 |
|
958 | return ["TilingPattern", color, operatorList, matrix, bbox, xstep, ystep, paintType, tilingType];
|
959 | } |
\ | No newline at end of file |