45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
import utif from "utif2";
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function getDimensionValue(dimension) {
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if (typeof dimension === "number") {
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return dimension;
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}
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if (dimension instanceof Uint8Array) {
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return dimension[0];
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}
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if (typeof dimension[0] === "string") {
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return parseInt(dimension[0]);
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}
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return dimension[0];
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}
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export default function tiff() {
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return {
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mime: "image/tiff",
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encode: (bitmap) => {
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const tiff = utif.encodeImage(bitmap.data, bitmap.width, bitmap.height);
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return Buffer.from(tiff);
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},
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decode: (data) => {
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const ifds = utif.decode(data);
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const page = ifds[0];
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if (!page) {
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throw new Error("No page found in TIFF");
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}
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if (!page.t256) {
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throw new Error("No image width found in TIFF");
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}
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if (!page.t257) {
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throw new Error("No image height found in TIFF");
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}
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ifds.forEach((ifd) => {
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utif.decodeImage(data, ifd);
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});
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const rgba = utif.toRGBA8(page);
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return {
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data: Buffer.from(rgba),
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width: getDimensionValue(page.t256),
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height: getDimensionValue(page.t257),
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};
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},
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};
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}
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//# sourceMappingURL=index.js.map
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