959 lines
27 KiB
JavaScript
959 lines
27 KiB
JavaScript
/**
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* @licstart The following is the entire license notice for the
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* JavaScript code in this page
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*
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* Copyright 2022 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @licend The above is the entire license notice for the
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* JavaScript code in this page
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*/
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.Pattern = void 0;
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exports.getTilingPatternIR = getTilingPatternIR;
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var _util = require("../shared/util.js");
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var _base_stream = require("./base_stream.js");
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var _colorspace = require("./colorspace.js");
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var _core_utils = require("./core_utils.js");
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const ShadingType = {
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FUNCTION_BASED: 1,
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AXIAL: 2,
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RADIAL: 3,
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FREE_FORM_MESH: 4,
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LATTICE_FORM_MESH: 5,
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COONS_PATCH_MESH: 6,
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TENSOR_PATCH_MESH: 7
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};
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class Pattern {
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constructor() {
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(0, _util.unreachable)("Cannot initialize Pattern.");
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}
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static parseShading(shading, xref, res, handler, pdfFunctionFactory, localColorSpaceCache) {
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const dict = shading instanceof _base_stream.BaseStream ? shading.dict : shading;
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const type = dict.get("ShadingType");
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try {
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switch (type) {
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case ShadingType.AXIAL:
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case ShadingType.RADIAL:
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return new RadialAxialShading(dict, xref, res, pdfFunctionFactory, localColorSpaceCache);
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case ShadingType.FREE_FORM_MESH:
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case ShadingType.LATTICE_FORM_MESH:
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case ShadingType.COONS_PATCH_MESH:
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case ShadingType.TENSOR_PATCH_MESH:
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return new MeshShading(shading, xref, res, pdfFunctionFactory, localColorSpaceCache);
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default:
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throw new _util.FormatError("Unsupported ShadingType: " + type);
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}
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} catch (ex) {
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if (ex instanceof _core_utils.MissingDataException) {
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throw ex;
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}
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handler.send("UnsupportedFeature", {
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featureId: _util.UNSUPPORTED_FEATURES.shadingPattern
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});
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(0, _util.warn)(ex);
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return new DummyShading();
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}
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}
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}
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exports.Pattern = Pattern;
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class BaseShading {
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static get SMALL_NUMBER() {
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return (0, _util.shadow)(this, "SMALL_NUMBER", 1e-6);
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}
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constructor() {
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if (this.constructor === BaseShading) {
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(0, _util.unreachable)("Cannot initialize BaseShading.");
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}
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}
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getIR() {
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(0, _util.unreachable)("Abstract method `getIR` called.");
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}
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}
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class RadialAxialShading extends BaseShading {
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constructor(dict, xref, resources, pdfFunctionFactory, localColorSpaceCache) {
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super();
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this.coordsArr = dict.getArray("Coords");
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this.shadingType = dict.get("ShadingType");
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const cs = _colorspace.ColorSpace.parse({
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cs: dict.getRaw("CS") || dict.getRaw("ColorSpace"),
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xref,
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resources,
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pdfFunctionFactory,
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localColorSpaceCache
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});
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const bbox = dict.getArray("BBox");
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if (Array.isArray(bbox) && bbox.length === 4) {
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this.bbox = _util.Util.normalizeRect(bbox);
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} else {
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this.bbox = null;
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}
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let t0 = 0.0,
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t1 = 1.0;
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if (dict.has("Domain")) {
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const domainArr = dict.getArray("Domain");
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t0 = domainArr[0];
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t1 = domainArr[1];
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}
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let extendStart = false,
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extendEnd = false;
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if (dict.has("Extend")) {
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const extendArr = dict.getArray("Extend");
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extendStart = extendArr[0];
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extendEnd = extendArr[1];
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}
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if (this.shadingType === ShadingType.RADIAL && (!extendStart || !extendEnd)) {
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const [x1, y1, r1, x2, y2, r2] = this.coordsArr;
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const distance = Math.hypot(x1 - x2, y1 - y2);
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if (r1 <= r2 + distance && r2 <= r1 + distance) {
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(0, _util.warn)("Unsupported radial gradient.");
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}
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}
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this.extendStart = extendStart;
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this.extendEnd = extendEnd;
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const fnObj = dict.getRaw("Function");
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const fn = pdfFunctionFactory.createFromArray(fnObj);
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const NUMBER_OF_SAMPLES = 10;
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const step = (t1 - t0) / NUMBER_OF_SAMPLES;
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const colorStops = this.colorStops = [];
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if (t0 >= t1 || step <= 0) {
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(0, _util.info)("Bad shading domain.");
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return;
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}
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const color = new Float32Array(cs.numComps),
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ratio = new Float32Array(1);
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let rgbColor;
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for (let i = 0; i <= NUMBER_OF_SAMPLES; i++) {
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ratio[0] = t0 + i * step;
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fn(ratio, 0, color, 0);
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rgbColor = cs.getRgb(color, 0);
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const cssColor = _util.Util.makeHexColor(rgbColor[0], rgbColor[1], rgbColor[2]);
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colorStops.push([i / NUMBER_OF_SAMPLES, cssColor]);
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}
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let background = "transparent";
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if (dict.has("Background")) {
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rgbColor = cs.getRgb(dict.get("Background"), 0);
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background = _util.Util.makeHexColor(rgbColor[0], rgbColor[1], rgbColor[2]);
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}
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if (!extendStart) {
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colorStops.unshift([0, background]);
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colorStops[1][0] += BaseShading.SMALL_NUMBER;
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}
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if (!extendEnd) {
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colorStops.at(-1)[0] -= BaseShading.SMALL_NUMBER;
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colorStops.push([1, background]);
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}
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this.colorStops = colorStops;
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}
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getIR() {
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const coordsArr = this.coordsArr;
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const shadingType = this.shadingType;
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let type, p0, p1, r0, r1;
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if (shadingType === ShadingType.AXIAL) {
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p0 = [coordsArr[0], coordsArr[1]];
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p1 = [coordsArr[2], coordsArr[3]];
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r0 = null;
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r1 = null;
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type = "axial";
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} else if (shadingType === ShadingType.RADIAL) {
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p0 = [coordsArr[0], coordsArr[1]];
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p1 = [coordsArr[3], coordsArr[4]];
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r0 = coordsArr[2];
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r1 = coordsArr[5];
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type = "radial";
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} else {
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(0, _util.unreachable)(`getPattern type unknown: ${shadingType}`);
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}
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return ["RadialAxial", type, this.bbox, this.colorStops, p0, p1, r0, r1];
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}
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}
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class MeshStreamReader {
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constructor(stream, context) {
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this.stream = stream;
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this.context = context;
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this.buffer = 0;
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this.bufferLength = 0;
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const numComps = context.numComps;
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this.tmpCompsBuf = new Float32Array(numComps);
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const csNumComps = context.colorSpace.numComps;
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this.tmpCsCompsBuf = context.colorFn ? new Float32Array(csNumComps) : this.tmpCompsBuf;
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}
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get hasData() {
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if (this.stream.end) {
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return this.stream.pos < this.stream.end;
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}
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if (this.bufferLength > 0) {
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return true;
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}
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const nextByte = this.stream.getByte();
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if (nextByte < 0) {
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return false;
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}
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this.buffer = nextByte;
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this.bufferLength = 8;
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return true;
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}
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readBits(n) {
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let buffer = this.buffer;
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let bufferLength = this.bufferLength;
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if (n === 32) {
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if (bufferLength === 0) {
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return (this.stream.getByte() << 24 | this.stream.getByte() << 16 | this.stream.getByte() << 8 | this.stream.getByte()) >>> 0;
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}
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buffer = buffer << 24 | this.stream.getByte() << 16 | this.stream.getByte() << 8 | this.stream.getByte();
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const nextByte = this.stream.getByte();
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this.buffer = nextByte & (1 << bufferLength) - 1;
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return (buffer << 8 - bufferLength | (nextByte & 0xff) >> bufferLength) >>> 0;
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}
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if (n === 8 && bufferLength === 0) {
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return this.stream.getByte();
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}
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while (bufferLength < n) {
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buffer = buffer << 8 | this.stream.getByte();
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bufferLength += 8;
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}
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bufferLength -= n;
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this.bufferLength = bufferLength;
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this.buffer = buffer & (1 << bufferLength) - 1;
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return buffer >> bufferLength;
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}
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align() {
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this.buffer = 0;
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this.bufferLength = 0;
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}
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readFlag() {
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return this.readBits(this.context.bitsPerFlag);
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}
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readCoordinate() {
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const bitsPerCoordinate = this.context.bitsPerCoordinate;
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const xi = this.readBits(bitsPerCoordinate);
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const yi = this.readBits(bitsPerCoordinate);
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const decode = this.context.decode;
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const scale = bitsPerCoordinate < 32 ? 1 / ((1 << bitsPerCoordinate) - 1) : 2.3283064365386963e-10;
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return [xi * scale * (decode[1] - decode[0]) + decode[0], yi * scale * (decode[3] - decode[2]) + decode[2]];
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}
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readComponents() {
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const numComps = this.context.numComps;
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const bitsPerComponent = this.context.bitsPerComponent;
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const scale = bitsPerComponent < 32 ? 1 / ((1 << bitsPerComponent) - 1) : 2.3283064365386963e-10;
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const decode = this.context.decode;
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const components = this.tmpCompsBuf;
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for (let i = 0, j = 4; i < numComps; i++, j += 2) {
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const ci = this.readBits(bitsPerComponent);
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components[i] = ci * scale * (decode[j + 1] - decode[j]) + decode[j];
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}
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const color = this.tmpCsCompsBuf;
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if (this.context.colorFn) {
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this.context.colorFn(components, 0, color, 0);
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}
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return this.context.colorSpace.getRgb(color, 0);
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}
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}
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const getB = function getBClosure() {
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function buildB(count) {
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const lut = [];
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for (let i = 0; i <= count; i++) {
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const t = i / count,
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t_ = 1 - t;
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lut.push(new Float32Array([t_ * t_ * t_, 3 * t * t_ * t_, 3 * t * t * t_, t * t * t]));
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}
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return lut;
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}
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const cache = [];
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return function (count) {
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if (!cache[count]) {
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cache[count] = buildB(count);
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}
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return cache[count];
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};
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}();
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class MeshShading extends BaseShading {
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static get MIN_SPLIT_PATCH_CHUNKS_AMOUNT() {
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return (0, _util.shadow)(this, "MIN_SPLIT_PATCH_CHUNKS_AMOUNT", 3);
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}
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static get MAX_SPLIT_PATCH_CHUNKS_AMOUNT() {
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return (0, _util.shadow)(this, "MAX_SPLIT_PATCH_CHUNKS_AMOUNT", 20);
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}
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static get TRIANGLE_DENSITY() {
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return (0, _util.shadow)(this, "TRIANGLE_DENSITY", 20);
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}
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constructor(stream, xref, resources, pdfFunctionFactory, localColorSpaceCache) {
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super();
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if (!(stream instanceof _base_stream.BaseStream)) {
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throw new _util.FormatError("Mesh data is not a stream");
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}
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const dict = stream.dict;
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this.shadingType = dict.get("ShadingType");
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const bbox = dict.getArray("BBox");
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if (Array.isArray(bbox) && bbox.length === 4) {
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this.bbox = _util.Util.normalizeRect(bbox);
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} else {
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this.bbox = null;
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}
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const cs = _colorspace.ColorSpace.parse({
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cs: dict.getRaw("CS") || dict.getRaw("ColorSpace"),
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xref,
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resources,
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pdfFunctionFactory,
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localColorSpaceCache
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});
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this.background = dict.has("Background") ? cs.getRgb(dict.get("Background"), 0) : null;
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const fnObj = dict.getRaw("Function");
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const fn = fnObj ? pdfFunctionFactory.createFromArray(fnObj) : null;
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this.coords = [];
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this.colors = [];
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this.figures = [];
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const decodeContext = {
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bitsPerCoordinate: dict.get("BitsPerCoordinate"),
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bitsPerComponent: dict.get("BitsPerComponent"),
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bitsPerFlag: dict.get("BitsPerFlag"),
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decode: dict.getArray("Decode"),
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colorFn: fn,
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colorSpace: cs,
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numComps: fn ? 1 : cs.numComps
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};
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const reader = new MeshStreamReader(stream, decodeContext);
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let patchMesh = false;
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switch (this.shadingType) {
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case ShadingType.FREE_FORM_MESH:
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this._decodeType4Shading(reader);
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break;
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case ShadingType.LATTICE_FORM_MESH:
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const verticesPerRow = dict.get("VerticesPerRow") | 0;
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if (verticesPerRow < 2) {
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throw new _util.FormatError("Invalid VerticesPerRow");
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}
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this._decodeType5Shading(reader, verticesPerRow);
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break;
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case ShadingType.COONS_PATCH_MESH:
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this._decodeType6Shading(reader);
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patchMesh = true;
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break;
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case ShadingType.TENSOR_PATCH_MESH:
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this._decodeType7Shading(reader);
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patchMesh = true;
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break;
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default:
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(0, _util.unreachable)("Unsupported mesh type.");
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break;
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}
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if (patchMesh) {
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this._updateBounds();
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for (let i = 0, ii = this.figures.length; i < ii; i++) {
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this._buildFigureFromPatch(i);
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}
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}
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this._updateBounds();
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this._packData();
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}
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_decodeType4Shading(reader) {
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const coords = this.coords;
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const colors = this.colors;
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const operators = [];
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const ps = [];
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let verticesLeft = 0;
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while (reader.hasData) {
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const f = reader.readFlag();
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const coord = reader.readCoordinate();
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const color = reader.readComponents();
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if (verticesLeft === 0) {
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if (!(0 <= f && f <= 2)) {
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throw new _util.FormatError("Unknown type4 flag");
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}
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switch (f) {
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case 0:
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verticesLeft = 3;
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break;
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case 1:
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ps.push(ps.at(-2), ps.at(-1));
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verticesLeft = 1;
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break;
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case 2:
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ps.push(ps.at(-3), ps.at(-1));
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verticesLeft = 1;
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break;
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}
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operators.push(f);
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}
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ps.push(coords.length);
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coords.push(coord);
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colors.push(color);
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verticesLeft--;
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reader.align();
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}
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this.figures.push({
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type: "triangles",
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coords: new Int32Array(ps),
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colors: new Int32Array(ps)
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});
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}
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_decodeType5Shading(reader, verticesPerRow) {
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const coords = this.coords;
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const colors = this.colors;
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const ps = [];
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while (reader.hasData) {
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const coord = reader.readCoordinate();
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const color = reader.readComponents();
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ps.push(coords.length);
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coords.push(coord);
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colors.push(color);
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}
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this.figures.push({
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type: "lattice",
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coords: new Int32Array(ps),
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colors: new Int32Array(ps),
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verticesPerRow
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});
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}
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_decodeType6Shading(reader) {
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const coords = this.coords;
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const colors = this.colors;
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const ps = new Int32Array(16);
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const cs = new Int32Array(4);
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while (reader.hasData) {
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const f = reader.readFlag();
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if (!(0 <= f && f <= 3)) {
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throw new _util.FormatError("Unknown type6 flag");
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}
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const pi = coords.length;
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for (let i = 0, ii = f !== 0 ? 8 : 12; i < ii; i++) {
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coords.push(reader.readCoordinate());
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}
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const ci = colors.length;
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for (let i = 0, ii = f !== 0 ? 2 : 4; i < ii; i++) {
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colors.push(reader.readComponents());
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}
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let tmp1, tmp2, tmp3, tmp4;
|
|
|
|
switch (f) {
|
|
case 0:
|
|
ps[12] = pi + 3;
|
|
ps[13] = pi + 4;
|
|
ps[14] = pi + 5;
|
|
ps[15] = pi + 6;
|
|
ps[8] = pi + 2;
|
|
ps[11] = pi + 7;
|
|
ps[4] = pi + 1;
|
|
ps[7] = pi + 8;
|
|
ps[0] = pi;
|
|
ps[1] = pi + 11;
|
|
ps[2] = pi + 10;
|
|
ps[3] = pi + 9;
|
|
cs[2] = ci + 1;
|
|
cs[3] = ci + 2;
|
|
cs[0] = ci;
|
|
cs[1] = ci + 3;
|
|
break;
|
|
|
|
case 1:
|
|
tmp1 = ps[12];
|
|
tmp2 = ps[13];
|
|
tmp3 = ps[14];
|
|
tmp4 = ps[15];
|
|
ps[12] = tmp4;
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = tmp3;
|
|
ps[11] = pi + 3;
|
|
ps[4] = tmp2;
|
|
ps[7] = pi + 4;
|
|
ps[0] = tmp1;
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
tmp1 = cs[2];
|
|
tmp2 = cs[3];
|
|
cs[2] = tmp2;
|
|
cs[3] = ci;
|
|
cs[0] = tmp1;
|
|
cs[1] = ci + 1;
|
|
break;
|
|
|
|
case 2:
|
|
tmp1 = ps[15];
|
|
tmp2 = ps[11];
|
|
ps[12] = ps[3];
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = ps[7];
|
|
ps[11] = pi + 3;
|
|
ps[4] = tmp2;
|
|
ps[7] = pi + 4;
|
|
ps[0] = tmp1;
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
tmp1 = cs[3];
|
|
cs[2] = cs[1];
|
|
cs[3] = ci;
|
|
cs[0] = tmp1;
|
|
cs[1] = ci + 1;
|
|
break;
|
|
|
|
case 3:
|
|
ps[12] = ps[0];
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = ps[1];
|
|
ps[11] = pi + 3;
|
|
ps[4] = ps[2];
|
|
ps[7] = pi + 4;
|
|
ps[0] = ps[3];
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
cs[2] = cs[0];
|
|
cs[3] = ci;
|
|
cs[0] = cs[1];
|
|
cs[1] = ci + 1;
|
|
break;
|
|
}
|
|
|
|
ps[5] = coords.length;
|
|
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]);
|
|
ps[6] = coords.length;
|
|
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]);
|
|
ps[9] = coords.length;
|
|
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]);
|
|
ps[10] = coords.length;
|
|
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]);
|
|
this.figures.push({
|
|
type: "patch",
|
|
coords: new Int32Array(ps),
|
|
colors: new Int32Array(cs)
|
|
});
|
|
}
|
|
}
|
|
|
|
_decodeType7Shading(reader) {
|
|
const coords = this.coords;
|
|
const colors = this.colors;
|
|
const ps = new Int32Array(16);
|
|
const cs = new Int32Array(4);
|
|
|
|
while (reader.hasData) {
|
|
const f = reader.readFlag();
|
|
|
|
if (!(0 <= f && f <= 3)) {
|
|
throw new _util.FormatError("Unknown type7 flag");
|
|
}
|
|
|
|
const pi = coords.length;
|
|
|
|
for (let i = 0, ii = f !== 0 ? 12 : 16; i < ii; i++) {
|
|
coords.push(reader.readCoordinate());
|
|
}
|
|
|
|
const ci = colors.length;
|
|
|
|
for (let i = 0, ii = f !== 0 ? 2 : 4; i < ii; i++) {
|
|
colors.push(reader.readComponents());
|
|
}
|
|
|
|
let tmp1, tmp2, tmp3, tmp4;
|
|
|
|
switch (f) {
|
|
case 0:
|
|
ps[12] = pi + 3;
|
|
ps[13] = pi + 4;
|
|
ps[14] = pi + 5;
|
|
ps[15] = pi + 6;
|
|
ps[8] = pi + 2;
|
|
ps[9] = pi + 13;
|
|
ps[10] = pi + 14;
|
|
ps[11] = pi + 7;
|
|
ps[4] = pi + 1;
|
|
ps[5] = pi + 12;
|
|
ps[6] = pi + 15;
|
|
ps[7] = pi + 8;
|
|
ps[0] = pi;
|
|
ps[1] = pi + 11;
|
|
ps[2] = pi + 10;
|
|
ps[3] = pi + 9;
|
|
cs[2] = ci + 1;
|
|
cs[3] = ci + 2;
|
|
cs[0] = ci;
|
|
cs[1] = ci + 3;
|
|
break;
|
|
|
|
case 1:
|
|
tmp1 = ps[12];
|
|
tmp2 = ps[13];
|
|
tmp3 = ps[14];
|
|
tmp4 = ps[15];
|
|
ps[12] = tmp4;
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = tmp3;
|
|
ps[9] = pi + 9;
|
|
ps[10] = pi + 10;
|
|
ps[11] = pi + 3;
|
|
ps[4] = tmp2;
|
|
ps[5] = pi + 8;
|
|
ps[6] = pi + 11;
|
|
ps[7] = pi + 4;
|
|
ps[0] = tmp1;
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
tmp1 = cs[2];
|
|
tmp2 = cs[3];
|
|
cs[2] = tmp2;
|
|
cs[3] = ci;
|
|
cs[0] = tmp1;
|
|
cs[1] = ci + 1;
|
|
break;
|
|
|
|
case 2:
|
|
tmp1 = ps[15];
|
|
tmp2 = ps[11];
|
|
ps[12] = ps[3];
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = ps[7];
|
|
ps[9] = pi + 9;
|
|
ps[10] = pi + 10;
|
|
ps[11] = pi + 3;
|
|
ps[4] = tmp2;
|
|
ps[5] = pi + 8;
|
|
ps[6] = pi + 11;
|
|
ps[7] = pi + 4;
|
|
ps[0] = tmp1;
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
tmp1 = cs[3];
|
|
cs[2] = cs[1];
|
|
cs[3] = ci;
|
|
cs[0] = tmp1;
|
|
cs[1] = ci + 1;
|
|
break;
|
|
|
|
case 3:
|
|
ps[12] = ps[0];
|
|
ps[13] = pi + 0;
|
|
ps[14] = pi + 1;
|
|
ps[15] = pi + 2;
|
|
ps[8] = ps[1];
|
|
ps[9] = pi + 9;
|
|
ps[10] = pi + 10;
|
|
ps[11] = pi + 3;
|
|
ps[4] = ps[2];
|
|
ps[5] = pi + 8;
|
|
ps[6] = pi + 11;
|
|
ps[7] = pi + 4;
|
|
ps[0] = ps[3];
|
|
ps[1] = pi + 7;
|
|
ps[2] = pi + 6;
|
|
ps[3] = pi + 5;
|
|
cs[2] = cs[0];
|
|
cs[3] = ci;
|
|
cs[0] = cs[1];
|
|
cs[1] = ci + 1;
|
|
break;
|
|
}
|
|
|
|
this.figures.push({
|
|
type: "patch",
|
|
coords: new Int32Array(ps),
|
|
colors: new Int32Array(cs)
|
|
});
|
|
}
|
|
}
|
|
|
|
_buildFigureFromPatch(index) {
|
|
const figure = this.figures[index];
|
|
(0, _util.assert)(figure.type === "patch", "Unexpected patch mesh figure");
|
|
const coords = this.coords,
|
|
colors = this.colors;
|
|
const pi = figure.coords;
|
|
const ci = figure.colors;
|
|
const figureMinX = Math.min(coords[pi[0]][0], coords[pi[3]][0], coords[pi[12]][0], coords[pi[15]][0]);
|
|
const figureMinY = Math.min(coords[pi[0]][1], coords[pi[3]][1], coords[pi[12]][1], coords[pi[15]][1]);
|
|
const figureMaxX = Math.max(coords[pi[0]][0], coords[pi[3]][0], coords[pi[12]][0], coords[pi[15]][0]);
|
|
const figureMaxY = Math.max(coords[pi[0]][1], coords[pi[3]][1], coords[pi[12]][1], coords[pi[15]][1]);
|
|
let splitXBy = Math.ceil((figureMaxX - figureMinX) * MeshShading.TRIANGLE_DENSITY / (this.bounds[2] - this.bounds[0]));
|
|
splitXBy = Math.max(MeshShading.MIN_SPLIT_PATCH_CHUNKS_AMOUNT, Math.min(MeshShading.MAX_SPLIT_PATCH_CHUNKS_AMOUNT, splitXBy));
|
|
let splitYBy = Math.ceil((figureMaxY - figureMinY) * MeshShading.TRIANGLE_DENSITY / (this.bounds[3] - this.bounds[1]));
|
|
splitYBy = Math.max(MeshShading.MIN_SPLIT_PATCH_CHUNKS_AMOUNT, Math.min(MeshShading.MAX_SPLIT_PATCH_CHUNKS_AMOUNT, splitYBy));
|
|
const verticesPerRow = splitXBy + 1;
|
|
const figureCoords = new Int32Array((splitYBy + 1) * verticesPerRow);
|
|
const figureColors = new Int32Array((splitYBy + 1) * verticesPerRow);
|
|
let k = 0;
|
|
const cl = new Uint8Array(3),
|
|
cr = new Uint8Array(3);
|
|
const c0 = colors[ci[0]],
|
|
c1 = colors[ci[1]],
|
|
c2 = colors[ci[2]],
|
|
c3 = colors[ci[3]];
|
|
const bRow = getB(splitYBy),
|
|
bCol = getB(splitXBy);
|
|
|
|
for (let row = 0; row <= splitYBy; row++) {
|
|
cl[0] = (c0[0] * (splitYBy - row) + c2[0] * row) / splitYBy | 0;
|
|
cl[1] = (c0[1] * (splitYBy - row) + c2[1] * row) / splitYBy | 0;
|
|
cl[2] = (c0[2] * (splitYBy - row) + c2[2] * row) / splitYBy | 0;
|
|
cr[0] = (c1[0] * (splitYBy - row) + c3[0] * row) / splitYBy | 0;
|
|
cr[1] = (c1[1] * (splitYBy - row) + c3[1] * row) / splitYBy | 0;
|
|
cr[2] = (c1[2] * (splitYBy - row) + c3[2] * row) / splitYBy | 0;
|
|
|
|
for (let col = 0; col <= splitXBy; col++, k++) {
|
|
if ((row === 0 || row === splitYBy) && (col === 0 || col === splitXBy)) {
|
|
continue;
|
|
}
|
|
|
|
let x = 0,
|
|
y = 0;
|
|
let q = 0;
|
|
|
|
for (let i = 0; i <= 3; i++) {
|
|
for (let j = 0; j <= 3; j++, q++) {
|
|
const m = bRow[row][i] * bCol[col][j];
|
|
x += coords[pi[q]][0] * m;
|
|
y += coords[pi[q]][1] * m;
|
|
}
|
|
}
|
|
|
|
figureCoords[k] = coords.length;
|
|
coords.push([x, y]);
|
|
figureColors[k] = colors.length;
|
|
const newColor = new Uint8Array(3);
|
|
newColor[0] = (cl[0] * (splitXBy - col) + cr[0] * col) / splitXBy | 0;
|
|
newColor[1] = (cl[1] * (splitXBy - col) + cr[1] * col) / splitXBy | 0;
|
|
newColor[2] = (cl[2] * (splitXBy - col) + cr[2] * col) / splitXBy | 0;
|
|
colors.push(newColor);
|
|
}
|
|
}
|
|
|
|
figureCoords[0] = pi[0];
|
|
figureColors[0] = ci[0];
|
|
figureCoords[splitXBy] = pi[3];
|
|
figureColors[splitXBy] = ci[1];
|
|
figureCoords[verticesPerRow * splitYBy] = pi[12];
|
|
figureColors[verticesPerRow * splitYBy] = ci[2];
|
|
figureCoords[verticesPerRow * splitYBy + splitXBy] = pi[15];
|
|
figureColors[verticesPerRow * splitYBy + splitXBy] = ci[3];
|
|
this.figures[index] = {
|
|
type: "lattice",
|
|
coords: figureCoords,
|
|
colors: figureColors,
|
|
verticesPerRow
|
|
};
|
|
}
|
|
|
|
_updateBounds() {
|
|
let minX = this.coords[0][0],
|
|
minY = this.coords[0][1],
|
|
maxX = minX,
|
|
maxY = minY;
|
|
|
|
for (let i = 1, ii = this.coords.length; i < ii; i++) {
|
|
const x = this.coords[i][0],
|
|
y = this.coords[i][1];
|
|
minX = minX > x ? x : minX;
|
|
minY = minY > y ? y : minY;
|
|
maxX = maxX < x ? x : maxX;
|
|
maxY = maxY < y ? y : maxY;
|
|
}
|
|
|
|
this.bounds = [minX, minY, maxX, maxY];
|
|
}
|
|
|
|
_packData() {
|
|
let i, ii, j, jj;
|
|
const coords = this.coords;
|
|
const coordsPacked = new Float32Array(coords.length * 2);
|
|
|
|
for (i = 0, j = 0, ii = coords.length; i < ii; i++) {
|
|
const xy = coords[i];
|
|
coordsPacked[j++] = xy[0];
|
|
coordsPacked[j++] = xy[1];
|
|
}
|
|
|
|
this.coords = coordsPacked;
|
|
const colors = this.colors;
|
|
const colorsPacked = new Uint8Array(colors.length * 3);
|
|
|
|
for (i = 0, j = 0, ii = colors.length; i < ii; i++) {
|
|
const c = colors[i];
|
|
colorsPacked[j++] = c[0];
|
|
colorsPacked[j++] = c[1];
|
|
colorsPacked[j++] = c[2];
|
|
}
|
|
|
|
this.colors = colorsPacked;
|
|
const figures = this.figures;
|
|
|
|
for (i = 0, ii = figures.length; i < ii; i++) {
|
|
const figure = figures[i],
|
|
ps = figure.coords,
|
|
cs = figure.colors;
|
|
|
|
for (j = 0, jj = ps.length; j < jj; j++) {
|
|
ps[j] *= 2;
|
|
cs[j] *= 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
getIR() {
|
|
return ["Mesh", this.shadingType, this.coords, this.colors, this.figures, this.bounds, this.bbox, this.background];
|
|
}
|
|
|
|
}
|
|
|
|
class DummyShading extends BaseShading {
|
|
getIR() {
|
|
return ["Dummy"];
|
|
}
|
|
|
|
}
|
|
|
|
function getTilingPatternIR(operatorList, dict, color) {
|
|
const matrix = dict.getArray("Matrix");
|
|
|
|
const bbox = _util.Util.normalizeRect(dict.getArray("BBox"));
|
|
|
|
const xstep = dict.get("XStep");
|
|
const ystep = dict.get("YStep");
|
|
const paintType = dict.get("PaintType");
|
|
const tilingType = dict.get("TilingType");
|
|
|
|
if (bbox[2] - bbox[0] === 0 || bbox[3] - bbox[1] === 0) {
|
|
throw new _util.FormatError(`Invalid getTilingPatternIR /BBox array: [${bbox}].`);
|
|
}
|
|
|
|
return ["TilingPattern", color, operatorList, matrix, bbox, xstep, ystep, paintType, tilingType];
|
|
} |