kollagen/cli/main.ts

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import { parse } from "https://deno.land/std@0.106.0/flags/mod.ts";
import { createCanvas, init } from "https://deno.land/x/canvas/mod.ts";
import { CollageModeType, collageModeType } from "../src/common/collages.ts";
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import DenoCollageModes, {
CastCanvasRenderingContext,
ProxyImage,
} from "./collages.ts";
import { CollageConfig } from "../src/common/types.ts";
import { choice, shuffle } from "../src/common/utils.ts";
const canvasKit = await init();
const args = parse(Deno.args, {
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alias: {
"w": "width",
"h": "height",
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"o": "output",
"m": "mode",
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},
});
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const files: string[] = [];
args["_"].forEach((arg) => {
arg = arg.toString();
if (Deno.statSync(arg).isDirectory) {
Array.from(Deno.readDirSync(arg)).forEach((entry) =>
files.push(`${arg}/${entry.name}`)
);
} else {
files.push(arg);
}
});
if (files.length < 2) {
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console.error("kollagen needs at least 2 images to work.");
Deno.exit(1);
}
const shuffledFiles = shuffle(files);
if (shuffledFiles.length > 25) {
console.debug(`Too many files available, shuffling and clamping to 25...`);
shuffledFiles.splice(25, shuffledFiles.length - 25);
}
const images: ProxyImage[] = (await Promise.all(
shuffledFiles.map(async (imageURL) =>
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canvasKit.MakeImageFromEncoded(await Deno.readFile(imageURL))
),
)).map((image) => new ProxyImage(image!));
const modes = new DenoCollageModes();
const modeKey: CollageModeType = args["mode"] || choice(collageModeType);
const mode = modes.modes[modeKey];
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console.log(
`Creating a "${mode.name}" collage...`,
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);
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console.debug(`Images: ${files.join(", ")}`);
const canvas = createCanvas(args["width"] || 640, args["height"] || 640);
const context = canvas.getContext("2d");
const collageConfig: CollageConfig = {
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numImages: args["n"],
};
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const segments = mode.getSegments(
context as CastCanvasRenderingContext,
collageConfig,
images,
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);
mode.place(context as CastCanvasRenderingContext, images, segments);
const output = args["output"] || "collage.png";
console.log(`Saving to "${output}"...`);
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await Deno.writeFile(output, canvas.toBuffer());