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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 176x 13x 165x 5x 73x 12x 147x 176x 492x 176x 176x 176x 176x 176x 13x 163x 163x 163x 36x 127x 127x 127x 162x 162x 162x 162x 162x 162x 162x 162x 162x 162x | "use strict";
let hasSyncZlib = true;
let zlib = require("zlib");
let inflateSync = require("./sync-inflate");
Iif (!zlib.deflateSync) {
hasSyncZlib = false;
}
let SyncReader = require("./sync-reader");
let FilterSync = require("./filter-parse-sync");
let Parser = require("./parser");
let bitmapper = require("./bitmapper");
let formatNormaliser = require("./format-normaliser");
module.exports = function (buffer, options) {
Iif (!hasSyncZlib) {
throw new Error(
"To use the sync capability of this library in old node versions, please pin pngjs to v2.3.0"
);
}
let err;
function handleError(_err_) {
err = _err_;
}
let metaData;
function handleMetaData(_metaData_) {
metaData = _metaData_;
}
function handleTransColor(transColor) {
metaData.transColor = transColor;
}
function handlePalette(palette) {
metaData.palette = palette;
}
function handleSimpleTransparency() {
metaData.alpha = true;
}
let gamma;
function handleGamma(_gamma_) {
gamma = _gamma_;
}
let inflateDataList = [];
function handleInflateData(inflatedData) {
inflateDataList.push(inflatedData);
}
let reader = new SyncReader(buffer);
let parser = new Parser(options, {
read: reader.read.bind(reader),
error: handleError,
metadata: handleMetaData,
gamma: handleGamma,
palette: handlePalette,
transColor: handleTransColor,
inflateData: handleInflateData,
simpleTransparency: handleSimpleTransparency,
});
parser.start();
reader.process();
if (err) {
throw err;
}
//join together the inflate datas
let inflateData = Buffer.concat(inflateDataList);
inflateDataList.length = 0;
let inflatedData;
if (metaData.interlace) {
inflatedData = zlib.inflateSync(inflateData);
} else {
let rowSize =
((metaData.width * metaData.bpp * metaData.depth + 7) >> 3) + 1;
let imageSize = rowSize * metaData.height;
inflatedData = inflateSync(inflateData, {
chunkSize: imageSize,
maxLength: imageSize,
});
}
inflateData = null;
Iif (!inflatedData || !inflatedData.length) {
throw new Error("bad png - invalid inflate data response");
}
let unfilteredData = FilterSync.process(inflatedData, metaData);
inflateData = null;
let bitmapData = bitmapper.dataToBitMap(unfilteredData, metaData);
unfilteredData = null;
let normalisedBitmapData = formatNormaliser(bitmapData, metaData);
metaData.data = normalisedBitmapData;
metaData.gamma = gamma || 0;
return metaData;
};
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