simsite/frontend/node_modules/three-stdlib/loaders/RGBELoader.cjs

"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
class RGBELoader extends THREE.DataTextureLoader {
  constructor(manager) {
    super(manager);
    this.type = THREE.HalfFloatType;
  }
  // adapted from http://www.graphics.cornell.edu/~bjw/rgbe.html
  parse(buffer) {
    const rgbe_read_error = 1, rgbe_write_error = 2, rgbe_format_error = 3, rgbe_memory_error = 4, rgbe_error = function(rgbe_error_code, msg) {
      switch (rgbe_error_code) {
        case rgbe_read_error:
          throw new Error("THREE.RGBELoader: Read Error: " + (msg || ""));
        case rgbe_write_error:
          throw new Error("THREE.RGBELoader: Write Error: " + (msg || ""));
        case rgbe_format_error:
          throw new Error("THREE.RGBELoader: Bad File Format: " + (msg || ""));
        default:
        case rgbe_memory_error:
          throw new Error("THREE.RGBELoader: Memory Error: " + (msg || ""));
      }
    }, RGBE_VALID_PROGRAMTYPE = 1, RGBE_VALID_FORMAT = 2, RGBE_VALID_DIMENSIONS = 4, NEWLINE = "\n", fgets = function(buffer2, lineLimit, consume) {
      const chunkSize = 128;
      lineLimit = !lineLimit ? 1024 : lineLimit;
      let p = buffer2.pos, i = -1, len = 0, s = "", chunk = String.fromCharCode.apply(null, new Uint16Array(buffer2.subarray(p, p + chunkSize)));
      while (0 > (i = chunk.indexOf(NEWLINE)) && len < lineLimit && p < buffer2.byteLength) {
        s += chunk;
        len += chunk.length;
        p += chunkSize;
        chunk += String.fromCharCode.apply(null, new Uint16Array(buffer2.subarray(p, p + chunkSize)));
      }
      if (-1 < i) {
        if (false !== consume)
          buffer2.pos += len + i + 1;
        return s + chunk.slice(0, i);
      }
      return false;
    }, RGBE_ReadHeader = function(buffer2) {
      const magic_token_re = /^#\?(\S+)/, gamma_re = /^\s*GAMMA\s*=\s*(\d+(\.\d+)?)\s*$/, exposure_re = /^\s*EXPOSURE\s*=\s*(\d+(\.\d+)?)\s*$/, format_re = /^\s*FORMAT=(\S+)\s*$/, dimensions_re = /^\s*\-Y\s+(\d+)\s+\+X\s+(\d+)\s*$/, header = {
        valid: 0,
        string: "",
        comments: "",
        programtype: "RGBE",
        format: "",
        gamma: 1,
        exposure: 1,
        width: 0,
        height: 0
      };
      let line, match;
      if (buffer2.pos >= buffer2.byteLength || !(line = fgets(buffer2))) {
        rgbe_error(rgbe_read_error, "no header found");
      }
      if (!(match = line.match(magic_token_re))) {
        rgbe_error(rgbe_format_error, "bad initial token");
      }
      header.valid |= RGBE_VALID_PROGRAMTYPE;
      header.programtype = match[1];
      header.string += line + "\n";
      while (true) {
        line = fgets(buffer2);
        if (false === line)
          break;
        header.string += line + "\n";
        if ("#" === line.charAt(0)) {
          header.comments += line + "\n";
          continue;
        }
        if (match = line.match(gamma_re)) {
          header.gamma = parseFloat(match[1]);
        }
        if (match = line.match(exposure_re)) {
          header.exposure = parseFloat(match[1]);
        }
        if (match = line.match(format_re)) {
          header.valid |= RGBE_VALID_FORMAT;
          header.format = match[1];
        }
        if (match = line.match(dimensions_re)) {
          header.valid |= RGBE_VALID_DIMENSIONS;
          header.height = parseInt(match[1], 10);
          header.width = parseInt(match[2], 10);
        }
        if (header.valid & RGBE_VALID_FORMAT && header.valid & RGBE_VALID_DIMENSIONS)
          break;
      }
      if (!(header.valid & RGBE_VALID_FORMAT)) {
        rgbe_error(rgbe_format_error, "missing format specifier");
      }
      if (!(header.valid & RGBE_VALID_DIMENSIONS)) {
        rgbe_error(rgbe_format_error, "missing image size specifier");
      }
      return header;
    }, RGBE_ReadPixels_RLE = function(buffer2, w2, h2) {
      const scanline_width = w2;
      if (
        // run length encoding is not allowed so read flat
        scanline_width < 8 || scanline_width > 32767 || // this file is not run length encoded
        2 !== buffer2[0] || 2 !== buffer2[1] || buffer2[2] & 128
      ) {
        return new Uint8Array(buffer2);
      }
      if (scanline_width !== (buffer2[2] << 8 | buffer2[3])) {
        rgbe_error(rgbe_format_error, "wrong scanline width");
      }
      const data_rgba = new Uint8Array(4 * w2 * h2);
      if (!data_rgba.length) {
        rgbe_error(rgbe_memory_error, "unable to allocate buffer space");
      }
      let offset = 0, pos = 0;
      const ptr_end = 4 * scanline_width;
      const rgbeStart = new Uint8Array(4);
      const scanline_buffer = new Uint8Array(ptr_end);
      let num_scanlines = h2;
      while (num_scanlines > 0 && pos < buffer2.byteLength) {
        if (pos + 4 > buffer2.byteLength) {
          rgbe_error(rgbe_read_error);
        }
        rgbeStart[0] = buffer2[pos++];
        rgbeStart[1] = buffer2[pos++];
        rgbeStart[2] = buffer2[pos++];
        rgbeStart[3] = buffer2[pos++];
        if (2 != rgbeStart[0] || 2 != rgbeStart[1] || (rgbeStart[2] << 8 | rgbeStart[3]) != scanline_width) {
          rgbe_error(rgbe_format_error, "bad rgbe scanline format");
        }
        let ptr = 0, count;
        while (ptr < ptr_end && pos < buffer2.byteLength) {
          count = buffer2[pos++];
          const isEncodedRun = count > 128;
          if (isEncodedRun)
            count -= 128;
          if (0 === count || ptr + count > ptr_end) {
            rgbe_error(rgbe_format_error, "bad scanline data");
          }
          if (isEncodedRun) {
            const byteValue = buffer2[pos++];
            for (let i = 0; i < count; i++) {
              scanline_buffer[ptr++] = byteValue;
            }
          } else {
            scanline_buffer.set(buffer2.subarray(pos, pos + count), ptr);
            ptr += count;
            pos += count;
          }
        }
        const l = scanline_width;
        for (let i = 0; i < l; i++) {
          let off = 0;
          data_rgba[offset] = scanline_buffer[i + off];
          off += scanline_width;
          data_rgba[offset + 1] = scanline_buffer[i + off];
          off += scanline_width;
          data_rgba[offset + 2] = scanline_buffer[i + off];
          off += scanline_width;
          data_rgba[offset + 3] = scanline_buffer[i + off];
          offset += 4;
        }
        num_scanlines--;
      }
      return data_rgba;
    };
    const RGBEByteToRGBFloat = function(sourceArray, sourceOffset, destArray, destOffset) {
      const e = sourceArray[sourceOffset + 3];
      const scale = Math.pow(2, e - 128) / 255;
      destArray[destOffset + 0] = sourceArray[sourceOffset + 0] * scale;
      destArray[destOffset + 1] = sourceArray[sourceOffset + 1] * scale;
      destArray[destOffset + 2] = sourceArray[sourceOffset + 2] * scale;
      destArray[destOffset + 3] = 1;
    };
    const RGBEByteToRGBHalf = function(sourceArray, sourceOffset, destArray, destOffset) {
      const e = sourceArray[sourceOffset + 3];
      const scale = Math.pow(2, e - 128) / 255;
      destArray[destOffset + 0] = THREE.DataUtils.toHalfFloat(Math.min(sourceArray[sourceOffset + 0] * scale, 65504));
      destArray[destOffset + 1] = THREE.DataUtils.toHalfFloat(Math.min(sourceArray[sourceOffset + 1] * scale, 65504));
      destArray[destOffset + 2] = THREE.DataUtils.toHalfFloat(Math.min(sourceArray[sourceOffset + 2] * scale, 65504));
      destArray[destOffset + 3] = THREE.DataUtils.toHalfFloat(1);
    };
    const byteArray = new Uint8Array(buffer);
    byteArray.pos = 0;
    const rgbe_header_info = RGBE_ReadHeader(byteArray);
    const w = rgbe_header_info.width, h = rgbe_header_info.height, image_rgba_data = RGBE_ReadPixels_RLE(byteArray.subarray(byteArray.pos), w, h);
    let data, type;
    let numElements;
    switch (this.type) {
      case THREE.FloatType:
        numElements = image_rgba_data.length / 4;
        const floatArray = new Float32Array(numElements * 4);
        for (let j = 0; j < numElements; j++) {
          RGBEByteToRGBFloat(image_rgba_data, j * 4, floatArray, j * 4);
        }
        data = floatArray;
        type = THREE.FloatType;
        break;
      case THREE.HalfFloatType:
        numElements = image_rgba_data.length / 4;
        const halfArray = new Uint16Array(numElements * 4);
        for (let j = 0; j < numElements; j++) {
          RGBEByteToRGBHalf(image_rgba_data, j * 4, halfArray, j * 4);
        }
        data = halfArray;
        type = THREE.HalfFloatType;
        break;
      default:
        throw new Error("THREE.RGBELoader: Unsupported type: " + this.type);
    }
    return {
      width: w,
      height: h,
      data,
      header: rgbe_header_info.string,
      gamma: rgbe_header_info.gamma,
      exposure: rgbe_header_info.exposure,
      type
    };
  }
  setDataType(value) {
    this.type = value;
    return this;
  }
  load(url, onLoad, onProgress, onError) {
    function onLoadCallback(texture, texData) {
      switch (texture.type) {
        case THREE.FloatType:
        case THREE.HalfFloatType:
          if ("colorSpace" in texture)
            texture.colorSpace = "srgb-linear";
          else
            texture.encoding = 3e3;
          texture.minFilter = THREE.LinearFilter;
          texture.magFilter = THREE.LinearFilter;
          texture.generateMipmaps = false;
          texture.flipY = true;
          break;
      }
      if (onLoad)
        onLoad(texture, texData);
    }
    return super.load(url, onLoadCallback, onProgress, onError);
  }
}
exports.RGBELoader = RGBELoader;
//# sourceMappingURL=RGBELoader.cjs.map