ry-vue-map/lib/ryui.common.3.js

ry公共组件库

((typeof self !== 'undefined' ? self : this)["webpackJsonpryui"] = (typeof self !== 'undefined' ? self : this)["webpackJsonpryui"] || []).push([[3],{

/***/ "852f":
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "default", function() { return LZWDecoder; });
/* harmony import */ var _basedecoder_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__("b3f7");


const MIN_BITS = 9;
const CLEAR_CODE = 256; // clear code
const EOI_CODE = 257; // end of information
const MAX_BYTELENGTH = 12;

function getByte(array, position, length) {
  const d = position % 8;
  const a = Math.floor(position / 8);
  const de = 8 - d;
  const ef = (position + length) - ((a + 1) * 8);
  let fg = (8 * (a + 2)) - (position + length);
  const dg = ((a + 2) * 8) - position;
  fg = Math.max(0, fg);
  if (a >= array.length) {
    console.warn('ran off the end of the buffer before finding EOI_CODE (end on input code)');
    return EOI_CODE;
  }
  let chunk1 = array[a] & ((2 ** (8 - d)) - 1);
  chunk1 <<= (length - de);
  let chunks = chunk1;
  if (a + 1 < array.length) {
    let chunk2 = array[a + 1] >>> fg;
    chunk2 <<= Math.max(0, (length - dg));
    chunks += chunk2;
  }
  if (ef > 8 && a + 2 < array.length) {
    const hi = ((a + 3) * 8) - (position + length);
    const chunk3 = array[a + 2] >>> hi;
    chunks += chunk3;
  }
  return chunks;
}

function appendReversed(dest, source) {
  for (let i = source.length - 1; i >= 0; i--) {
    dest.push(source[i]);
  }
  return dest;
}

function decompress(input) {
  const dictionaryIndex = new Uint16Array(4093);
  const dictionaryChar = new Uint8Array(4093);
  for (let i = 0; i <= 257; i++) {
    dictionaryIndex[i] = 4096;
    dictionaryChar[i] = i;
  }
  let dictionaryLength = 258;
  let byteLength = MIN_BITS;
  let position = 0;

  function initDictionary() {
    dictionaryLength = 258;
    byteLength = MIN_BITS;
  }
  function getNext(array) {
    const byte = getByte(array, position, byteLength);
    position += byteLength;
    return byte;
  }
  function addToDictionary(i, c) {
    dictionaryChar[dictionaryLength] = c;
    dictionaryIndex[dictionaryLength] = i;
    dictionaryLength++;
    return dictionaryLength - 1;
  }
  function getDictionaryReversed(n) {
    const rev = [];
    for (let i = n; i !== 4096; i = dictionaryIndex[i]) {
      rev.push(dictionaryChar[i]);
    }
    return rev;
  }

  const result = [];
  initDictionary();
  const array = new Uint8Array(input);
  let code = getNext(array);
  let oldCode;
  while (code !== EOI_CODE) {
    if (code === CLEAR_CODE) {
      initDictionary();
      code = getNext(array);
      while (code === CLEAR_CODE) {
        code = getNext(array);
      }

      if (code === EOI_CODE) {
        break;
      } else if (code > CLEAR_CODE) {
        throw new Error(`corrupted code at scanline ${code}`);
      } else {
        const val = getDictionaryReversed(code);
        appendReversed(result, val);
        oldCode = code;
      }
    } else if (code < dictionaryLength) {
      const val = getDictionaryReversed(code);
      appendReversed(result, val);
      addToDictionary(oldCode, val[val.length - 1]);
      oldCode = code;
    } else {
      const oldVal = getDictionaryReversed(oldCode);
      if (!oldVal) {
        throw new Error(`Bogus entry. Not in dictionary, ${oldCode} / ${dictionaryLength}, position: ${position}`);
      }
      appendReversed(result, oldVal);
      result.push(oldVal[oldVal.length - 1]);
      addToDictionary(oldCode, oldVal[oldVal.length - 1]);
      oldCode = code;
    }

    if (dictionaryLength + 1 >= (2 ** byteLength)) {
      if (byteLength === MAX_BYTELENGTH) {
        oldCode = undefined;
      } else {
        byteLength++;
      }
    }
    code = getNext(array);
  }
  return new Uint8Array(result);
}

class LZWDecoder extends _basedecoder_js__WEBPACK_IMPORTED_MODULE_0__[/* default */ "a"] {
  decodeBlock(buffer) {
    return decompress(buffer, false).buffer;
  }
}


/***/ }),

/***/ "b3f7":
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";

// EXPORTS
__webpack_require__.d(__webpack_exports__, "a", function() { return /* binding */ basedecoder_BaseDecoder; });

// CONCATENATED MODULE: ./node_modules/geotiff/dist-module/predictor.js
function decodeRowAcc(row, stride) {
  let length = row.length - stride;
  let offset = 0;
  do {
    for (let i = stride; i > 0; i--) {
      row[offset + stride] += row[offset];
      offset++;
    }

    length -= stride;
  } while (length > 0);
}

function decodeRowFloatingPoint(row, stride, bytesPerSample) {
  let index = 0;
  let count = row.length;
  const wc = count / bytesPerSample;

  while (count > stride) {
    for (let i = stride; i > 0; --i) {
      row[index + stride] += row[index];
      ++index;
    }
    count -= stride;
  }

  const copy = row.slice();
  for (let i = 0; i < wc; ++i) {
    for (let b = 0; b < bytesPerSample; ++b) {
      row[(bytesPerSample * i) + b] = copy[((bytesPerSample - b - 1) * wc) + i];
    }
  }
}

function applyPredictor(block, predictor, width, height, bitsPerSample,
  planarConfiguration) {
  if (!predictor || predictor === 1) {
    return block;
  }

  for (let i = 0; i < bitsPerSample.length; ++i) {
    if (bitsPerSample[i] % 8 !== 0) {
      throw new Error('When decoding with predictor, only multiple of 8 bits are supported.');
    }
    if (bitsPerSample[i] !== bitsPerSample[0]) {
      throw new Error('When decoding with predictor, all samples must have the same size.');
    }
  }

  const bytesPerSample = bitsPerSample[0] / 8;
  const stride = planarConfiguration === 2 ? 1 : bitsPerSample.length;

  for (let i = 0; i < height; ++i) {
    // Last strip will be truncated if height % stripHeight != 0
    if (i * stride * width * bytesPerSample >= block.byteLength) {
      break;
    }
    let row;
    if (predictor === 2) { // horizontal prediction
      switch (bitsPerSample[0]) {
        case 8:
          row = new Uint8Array(
            block, i * stride * width * bytesPerSample, stride * width * bytesPerSample,
          );
          break;
        case 16:
          row = new Uint16Array(
            block, i * stride * width * bytesPerSample, stride * width * bytesPerSample / 2,
          );
          break;
        case 32:
          row = new Uint32Array(
            block, i * stride * width * bytesPerSample, stride * width * bytesPerSample / 4,
          );
          break;
        default:
          throw new Error(`Predictor 2 not allowed with ${bitsPerSample[0]} bits per sample.`);
      }
      decodeRowAcc(row, stride, bytesPerSample);
    } else if (predictor === 3) { // horizontal floating point
      row = new Uint8Array(
        block, i * stride * width * bytesPerSample, stride * width * bytesPerSample,
      );
      decodeRowFloatingPoint(row, stride, bytesPerSample);
    }
  }
  return block;
}

// CONCATENATED MODULE: ./node_modules/geotiff/dist-module/compression/basedecoder.js


class basedecoder_BaseDecoder {
  async decode(fileDirectory, buffer) {
    const decoded = await this.decodeBlock(buffer);
    const predictor = fileDirectory.Predictor || 1;
    if (predictor !== 1) {
      const isTiled = !fileDirectory.StripOffsets;
      const tileWidth = isTiled ? fileDirectory.TileWidth : fileDirectory.ImageWidth;
      const tileHeight = isTiled ? fileDirectory.TileLength : (
        fileDirectory.RowsPerStrip || fileDirectory.ImageLength
      );
      return applyPredictor(
        decoded, predictor, tileWidth, tileHeight, fileDirectory.BitsPerSample,
        fileDirectory.PlanarConfiguration,
      );
    }
    return decoded;
  }
}


/***/ })

}]);