pdfjs-dist/lib/test/unit/colorspace_spec.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2020 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

var _primitives = require("../../core/primitives.js");

var _stream = require("../../core/stream.js");

var _colorspace = require("../../core/colorspace.js");

var _function = require("../../core/function.js");

var _test_utils = require("./test_utils.js");

describe("colorspace", function () {
  describe("ColorSpace", function () {
    it("should be true if decode is not an array", function () {
      expect(_colorspace.ColorSpace.isDefaultDecode("string", 0)).toBeTruthy();
    });
    it("should be true if length of decode array is not correct", function () {
      expect(_colorspace.ColorSpace.isDefaultDecode([0], 1)).toBeTruthy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 1, 0], 1)).toBeTruthy();
    });
    it("should be true if decode map matches the default decode map", function () {
      expect(_colorspace.ColorSpace.isDefaultDecode([], 0)).toBeTruthy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 0], 1)).toBeFalsy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 1], 1)).toBeTruthy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 1, 0, 1, 0, 1], 3)).toBeTruthy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 1, 0, 1, 1, 1], 3)).toBeFalsy();
      expect(_colorspace.ColorSpace.isDefaultDecode([0, 1, 0, 1, 0, 1, 0, 1], 4)).toBeTruthy();
      expect(_colorspace.ColorSpace.isDefaultDecode([1, 0, 0, 1, 0, 1, 0, 1], 4)).toBeFalsy();
    });
  });
  describe("DeviceGrayCS", function () {
    it("should handle the case when cs is a Name object", function () {
      const cs = _primitives.Name.get("DeviceGray");

      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131]);
      const testDest = new Uint8ClampedArray(4 * 4 * 3);
      const expectedDest = new Uint8ClampedArray([27, 27, 27, 27, 27, 27, 125, 125, 125, 125, 125, 125, 27, 27, 27, 27, 27, 27, 125, 125, 125, 125, 125, 125, 250, 250, 250, 250, 250, 250, 131, 131, 131, 131, 131, 131, 250, 250, 250, 250, 250, 250, 131, 131, 131, 131, 131, 131]);
      colorSpace.fillRgb(testDest, 2, 2, 4, 4, 4, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1]), 0)).toEqual(new Uint8ClampedArray([26, 26, 26]));
      expect(colorSpace.getOutputLength(2, 0)).toEqual(6);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
    it("should handle the case when cs is an indirect object", function () {
      const cs = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref: cs,
        data: _primitives.Name.get("DeviceGray")
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([27, 27, 27, 27, 27, 27, 125, 125, 125, 27, 27, 27, 27, 27, 27, 125, 125, 125, 250, 250, 250, 250, 250, 250, 131, 131, 131]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.2]), 0)).toEqual(new Uint8ClampedArray([51, 51, 51]));
      expect(colorSpace.getOutputLength(3, 1)).toEqual(12);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("DeviceRgbCS", function () {
    it("should handle the case when cs is a Name object", function () {
      const cs = _primitives.Name.get("DeviceRGB");

      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131, 139, 140, 111, 25, 198, 21, 147, 255]);
      const testDest = new Uint8ClampedArray(4 * 4 * 3);
      const expectedDest = new Uint8ClampedArray([27, 125, 250, 27, 125, 250, 131, 139, 140, 131, 139, 140, 27, 125, 250, 27, 125, 250, 131, 139, 140, 131, 139, 140, 111, 25, 198, 111, 25, 198, 21, 147, 255, 21, 147, 255, 111, 25, 198, 111, 25, 198, 21, 147, 255, 21, 147, 255]);
      colorSpace.fillRgb(testDest, 2, 2, 4, 4, 4, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1, 0.2, 0.3]), 0)).toEqual(new Uint8ClampedArray([26, 51, 77]));
      expect(colorSpace.getOutputLength(4, 0)).toEqual(4);
      expect(colorSpace.isPassthrough(8)).toBeTruthy();
      expect(testDest).toEqual(expectedDest);
    });
    it("should handle the case when cs is an indirect object", function () {
      const cs = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref: cs,
        data: _primitives.Name.get("DeviceRGB")
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131, 139, 140, 111, 25, 198, 21, 147, 255]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([27, 125, 250, 27, 125, 250, 131, 139, 140, 27, 125, 250, 27, 125, 250, 131, 139, 140, 111, 25, 198, 111, 25, 198, 21, 147, 255]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1, 0.2, 0.3]), 0)).toEqual(new Uint8ClampedArray([26, 51, 77]));
      expect(colorSpace.getOutputLength(4, 1)).toEqual(5);
      expect(colorSpace.isPassthrough(8)).toBeTruthy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("DeviceCmykCS", function () {
    it("should handle the case when cs is a Name object", function () {
      const cs = _primitives.Name.get("DeviceCMYK");

      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 128, 131, 139, 140, 45, 111, 25, 198, 78, 21, 147, 255, 69]);
      const testDest = new Uint8ClampedArray(4 * 4 * 3);
      const expectedDest = new Uint8ClampedArray([135, 81, 18, 135, 81, 18, 114, 102, 97, 114, 102, 97, 135, 81, 18, 135, 81, 18, 114, 102, 97, 114, 102, 97, 112, 144, 75, 112, 144, 75, 188, 98, 27, 188, 98, 27, 112, 144, 75, 112, 144, 75, 188, 98, 27, 188, 98, 27]);
      colorSpace.fillRgb(testDest, 2, 2, 4, 4, 4, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1, 0.2, 0.3, 1]), 0)).toEqual(new Uint8ClampedArray([32, 28, 21]));
      expect(colorSpace.getOutputLength(4, 0)).toEqual(3);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
    it("should handle the case when cs is an indirect object", function () {
      const cs = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref: cs,
        data: _primitives.Name.get("DeviceCMYK")
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 128, 131, 139, 140, 45, 111, 25, 198, 78, 21, 147, 255, 69]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([135, 81, 18, 135, 81, 18, 114, 102, 97, 135, 81, 18, 135, 81, 18, 114, 102, 97, 112, 144, 75, 112, 144, 75, 188, 98, 27]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1, 0.2, 0.3, 1]), 0)).toEqual(new Uint8ClampedArray([32, 28, 21]));
      expect(colorSpace.getOutputLength(4, 1)).toEqual(4);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("CalGrayCS", function () {
    it("should handle the case when cs is an array", function () {
      const params = new _primitives.Dict();
      params.set("WhitePoint", [1, 1, 1]);
      params.set("BlackPoint", [0, 0, 0]);
      params.set("Gamma", 2.0);
      const cs = [_primitives.Name.get("CalGray"), params];
      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131]);
      const testDest = new Uint8ClampedArray(4 * 4 * 3);
      const expectedDest = new Uint8ClampedArray([25, 25, 25, 25, 25, 25, 143, 143, 143, 143, 143, 143, 25, 25, 25, 25, 25, 25, 143, 143, 143, 143, 143, 143, 251, 251, 251, 251, 251, 251, 149, 149, 149, 149, 149, 149, 251, 251, 251, 251, 251, 251, 149, 149, 149, 149, 149, 149]);
      colorSpace.fillRgb(testDest, 2, 2, 4, 4, 4, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([1.0]), 0)).toEqual(new Uint8ClampedArray([255, 255, 255]));
      expect(colorSpace.getOutputLength(4, 0)).toEqual(12);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("CalRGBCS", function () {
    it("should handle the case when cs is an array", function () {
      const params = new _primitives.Dict();
      params.set("WhitePoint", [1, 1, 1]);
      params.set("BlackPoint", [0, 0, 0]);
      params.set("Gamma", [1, 1, 1]);
      params.set("Matrix", [1, 0, 0, 0, 1, 0, 0, 0, 1]);
      const cs = [_primitives.Name.get("CalRGB"), params];
      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 125, 250, 131, 139, 140, 111, 25, 198, 21, 147, 255]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([0, 238, 255, 0, 238, 255, 185, 196, 195, 0, 238, 255, 0, 238, 255, 185, 196, 195, 235, 0, 243, 235, 0, 243, 0, 255, 255]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb(new Float32Array([0.1, 0.2, 0.3]), 0)).toEqual(new Uint8ClampedArray([0, 147, 151]));
      expect(colorSpace.getOutputLength(4, 0)).toEqual(4);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("LabCS", function () {
    it("should handle the case when cs is an array", function () {
      const params = new _primitives.Dict();
      params.set("WhitePoint", [1, 1, 1]);
      params.set("BlackPoint", [0, 0, 0]);
      params.set("Range", [-100, 100, -100, 100]);
      const cs = [_primitives.Name.get("Lab"), params];
      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 25, 50, 31, 19, 40, 11, 25, 98, 21, 47, 55]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([0, 49, 101, 0, 49, 101, 0, 53, 117, 0, 49, 101, 0, 49, 101, 0, 53, 117, 0, 41, 40, 0, 41, 40, 0, 43, 90]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb([55, 25, 35], 0)).toEqual(new Uint8ClampedArray([188, 100, 61]));
      expect(colorSpace.getOutputLength(4, 0)).toEqual(4);
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(colorSpace.isDefaultDecode([0, 1])).toBeTruthy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("IndexedCS", function () {
    it("should handle the case when cs is an array", function () {
      const lookup = new Uint8Array([23, 155, 35, 147, 69, 93, 255, 109, 70]);
      const cs = [_primitives.Name.get("Indexed"), _primitives.Name.get("DeviceRGB"), 2, lookup];
      const xref = new _test_utils.XRefMock([{
        ref: _primitives.Ref.get(10, 0),
        data: new _primitives.Dict()
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([2, 2, 0, 1]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([255, 109, 70, 255, 109, 70, 255, 109, 70, 255, 109, 70, 255, 109, 70, 255, 109, 70, 23, 155, 35, 23, 155, 35, 147, 69, 93]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb([2], 0)).toEqual(new Uint8ClampedArray([255, 109, 70]));
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(colorSpace.isDefaultDecode([0, 1], 1)).toBeTruthy();
      expect(testDest).toEqual(expectedDest);
    });
  });
  describe("AlternateCS", function () {
    it("should handle the case when cs is an array", function () {
      const fnDict = new _primitives.Dict();
      fnDict.set("FunctionType", 4);
      fnDict.set("Domain", [0.0, 1.0]);
      fnDict.set("Range", [0.0, 1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 1.0]);
      fnDict.set("Length", 58);
      let fn = new _stream.StringStream("{ dup 0.84 mul " + "exch 0.00 exch " + "dup 0.44 mul " + "exch 0.21 mul }");
      fn = new _stream.Stream(fn.bytes, 0, 58, fnDict);

      const fnRef = _primitives.Ref.get(10, 0);

      const cs = [_primitives.Name.get("Separation"), _primitives.Name.get("LogoGreen"), _primitives.Name.get("DeviceCMYK"), fnRef];
      const xref = new _test_utils.XRefMock([{
        ref: fnRef,
        data: fn
      }]);
      const res = new _primitives.Dict();
      const pdfFunctionFactory = new _function.PDFFunctionFactory({
        xref
      });

      const colorSpace = _colorspace.ColorSpace.parse(cs, xref, res, pdfFunctionFactory);

      const testSrc = new Uint8Array([27, 25, 50, 31]);
      const testDest = new Uint8ClampedArray(3 * 3 * 3);
      const expectedDest = new Uint8ClampedArray([226, 242, 241, 226, 242, 241, 229, 244, 242, 226, 242, 241, 226, 242, 241, 229, 244, 242, 203, 232, 229, 203, 232, 229, 222, 241, 238]);
      colorSpace.fillRgb(testDest, 2, 2, 3, 3, 3, 8, testSrc, 0);
      expect(colorSpace.getRgb([0.1], 0)).toEqual(new Uint8ClampedArray([228, 243, 242]));
      expect(colorSpace.isPassthrough(8)).toBeFalsy();
      expect(colorSpace.isDefaultDecode([0, 1])).toBeTruthy();
      expect(testDest).toEqual(expectedDest);
    });
  });
});