From acf07829d0e11828369d1dc62a8c8a3ce4f68f1c Mon Sep 17 00:00:00 2001 From: skye Date: Thu, 30 Dec 2021 21:34:34 +0900 Subject: [PATCH] draw... --- config.json | 5 + index.js | 65 ++++++++ package-lock.json | 374 ++++++++++++++++++++++++++++++++++++++++++++++ package.json | 18 +++ 4 files changed, 462 insertions(+) create mode 100644 config.json create mode 100644 index.js create mode 100644 package-lock.json create mode 100644 package.json diff --git a/config.json b/config.json new file mode 100644 index 0000000..36ceb8b --- /dev/null +++ b/config.json @@ -0,0 +1,5 @@ +{ + "port": 42069, + "width": 640, + "height": 480 +} diff --git a/index.js b/index.js new file mode 100644 index 0000000..39f0ea8 --- /dev/null +++ b/index.js @@ -0,0 +1,65 @@ +const express = require("express"); +const path = require("path"); +const { port, width, height } = require("./config.json"); +const app = express(); + +const indexResponse = ` + + + + draw + + +
+

send a get request to /set/[x]/[y]/[r]/[g]/[b] to change the image

+ + +`; + +let image = Buffer.alloc(14 + 12 + width * height * 3); + +app.get("/image", (req, res) => { + res.writeHead(200, { "Content-Type": "image/bmp", "Content-Length": image.length }); + res.end(image); +}); + +app.get("/", (req, res) => { + res.send(indexResponse); +}); + +app.get("/set/:x/:y/:r/:g/:b", (req, res) => { + let { x, y, r, g, b } = req.params; + [ x, y, r, g, b ] = [ +x, +y, +r, +g, +b ]; + + if (x >= width || y >= height) { + res.status(400).send({ success: 0, error: "coordinates outside of bounds" }); + } else if (r >= 256 || g >= 256 || b >= 256) { + res.status(400).send({ success: 0, error: "check your colour values....." }); + } else { + const pos = (x + (height - y - 1) * width) * 3 + 26; + image[pos + 0] = r; + image[pos + 1] = g; + image[pos + 2] = b; + + res.status(200).send({ success: 1 }); + } +}); + +app.listen(port, () => { + // manually writing the header :michael: + const length = image.length; + image.set([ + 0x42, 0x4D, + (length >> 0) & 0xFF, (length >> 8) & 0xFF, (length >> 16) & 0xFF, (length >> 24) & 0xFF, + 0x00, 0x00, + 0x00, 0x00, + 0x1A, 0x00, 0x00, 0x00, + 0x0C, 0x00, 0x00, 0x00, + (width >> 0) & 0xFF, (width >> 8) & 0xFF, + (height >> 0) & 0xFF, (height >> 8) & 0xFF, + 0x01, 0x00, + 0x18, 0x00 + ], 0); + + console.log(`deatj at http://0.0.0.0:${port}/`); +}); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..13321cc --- /dev/null +++ b/package-lock.json @@ -0,0 +1,374 @@ +{ + "name": "draw", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "accepts": { + "version": "1.3.7", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz", + "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==", + "requires": { + "mime-types": "~2.1.24", + "negotiator": "0.6.2" + } + }, + "array-flatten": { + "version": "1.1.1", + "resolved": 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machine", + "main": "index.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "repository": { + "type": "git", + "url": "https://git.oat.zone/skye/draw.git" + }, + "author": "?", + "license": "SEE LICENSE IN LICENSE", + "dependencies": { + "express": "^4.17.2" + } +}