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test.js
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test.js
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const fs = require("fs");
const test = require("flug");
const findAndRead = require("find-and-read");
const toImageData = require("to-image-data");
const xdim = require("xdim");
const readim = require("readim");
const writeImage = require("./write-image");
test("jpg to png", async ({ eq }) => {
const jpg = findAndRead("flower.jpg");
const { height, width, pixels } = await readim({ data: jpg });
const result = writeImage({ data: pixels, debug: false, format: "png", height, width });
fs.writeFileSync("jpg-to-png.png", result.data);
eq(result.height, height);
eq(result.width, width);
eq(Buffer.isBuffer(result.data), true);
});
test("png to jpg", async ({ eq }) => {
const png = findAndRead("flower.png");
const { height, width, pixels } = await readim({ data: png });
const result = writeImage({ data: pixels, debug: false, format: "jpg", height, width });
fs.writeFileSync("png-to-jpg.jpg", result.data);
eq(result.height, height);
eq(result.width, width);
eq(Buffer.isBuffer(result.data), true);
});
test("png to png", async ({ eq }) => {
const png = findAndRead("flower.png");
const { height, width, pixels } = await readim({ data: png });
const result = writeImage({ data: pixels, debug: false, format: "png", height, width });
fs.writeFileSync("png-to-png.png", result.data);
eq(result.height, height);
eq(result.width, width);
eq(Buffer.isBuffer(result.data), true);
});
test("jpg to jpg", async ({ eq }) => {
const jpg = findAndRead("flower.jpg");
const { height, width, pixels } = await readim({ data: jpg });
const result = writeImage({ data: pixels, debug: false, format: "jpg", height, width });
fs.writeFileSync("jpg-to-jpg.jpg", result.data);
eq(result.height, height);
eq(result.width, width);
eq(Buffer.isBuffer(result.data), true);
});
test("unknown size", async ({ eq }) => {
const png = findAndRead("flower-big.jpg");
const { height, width, pixels } = await readim({ data: png });
// transform pixels from rgab to [band][row][column]
const { data } = xdim.transform({
data: pixels,
from: "[row,column][band]",
to: "[band][row][column]",
sizes: {
band: 4,
column: 460,
row: 460
}
});
const result = writeImage({ data, debug: false, format: "png", height: undefined, width: undefined });
fs.writeFileSync("unknown-size.png", result.data);
eq(result.height, height);
eq(result.width, width);
eq(Buffer.isBuffer(result.data), true);
});