SourceTermAnalysisSystem_vue/node_modules/.vite/deps/chunk-C5KGH6RQ.js
2026-05-15 10:22:44 +08:00

115 lines
3.3 KiB
JavaScript

// 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) {
if (i * stride * width * bytesPerSample >= block.byteLength) {
break;
}
let row;
if (predictor === 2) {
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) {
row = new Uint8Array(
block,
i * stride * width * bytesPerSample,
stride * width * bytesPerSample
);
decodeRowFloatingPoint(row, stride, bytesPerSample);
}
}
return block;
}
// node_modules/geotiff/dist-module/compression/basedecoder.js
var BaseDecoder = class {
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;
}
};
export {
BaseDecoder
};
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