80 lines
3.1 KiB
JavaScript
80 lines
3.1 KiB
JavaScript
/*
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############################################################################################
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# Hellen-One: A board rendering server script.
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# (c) andreika <[email protected]>
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############################################################################################
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Node.js is required to run this script: https://nodejs.org/en/download/
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Also please install PNGJS Node modules before running:
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> npm install --prefix ./bin/render_vrml pngjs
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*/
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function getPixel(img, x, y) {
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if (x < 0 || y < 0 || x >= img.width || y >= img.height)
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return [0, 0, 0, 0];
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var idx = (img.width * y + x) << 2;
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return [ img.data[idx], img.data[idx + 1], img.data[idx + 2], img.data[idx + 3] ];
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}
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function createBoardImg(pcbImg, outlineImg, compImg, compImgOffset) {
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var boardImg = new PNG({
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width: Math.max(pcbImg.width, outlineImg.width, compImg.width),
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height: Math.max(pcbImg.height, outlineImg.height, compImg.height) });
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var pcbOffY = (pcbImg.height < outlineImg.height) ? -(outlineImg.height - pcbImg.height) : 0;
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// Blit the pcbImg using the outlineImg mask and add compImg.
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// We cannot use PNG.bitblt() for that
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for (var y = 0; y < boardImg.height; y++) {
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for (var x = 0; x < boardImg.width; x++) {
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var bPixel = getPixel(pcbImg, x, y + pcbOffY);
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var cPixel = getPixel(compImg, x + compImgOffset[0], y + compImgOffset[1]);
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var a = parseFloat(cPixel[3]) / 255.0;
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var na = 1.0 - a;
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var idx = (boardImg.width * y + x) << 2;
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boardImg.data[idx + 0] = na * bPixel[0] + a * cPixel[0];
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boardImg.data[idx + 1] = na * bPixel[1] + a * cPixel[1];
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boardImg.data[idx + 2] = na * bPixel[2] + a * cPixel[2];
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boardImg.data[idx + 3] = na * getPixel(outlineImg, x, y)[0] + a * 255;
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}
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}
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return boardImg;
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}
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try {
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var PNG = require("pngjs").PNG;
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// built-in modules
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var fs = require("fs");
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var args = process.argv.slice(2);
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if (args.length < 4) {
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console.log("* Error! Please specify correct arguments to run this script!");
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process.exit(1)
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}
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// arguments
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var pcbImgFile = args[0];
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var outlineImgFile = args[1];
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var compImgFile = args[2];
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var boardImgFile = args[3];
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var compImgOffset = args[4].split(",").map((x) => parseInt(x));
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console.log("* Reading the pcb image...");
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var pcbImg = PNG.sync.read(fs.readFileSync(pcbImgFile));
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console.log("* Reading the components image with offset (" + compImgOffset[0] + "," + compImgOffset[1] + ")...");
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var compImg = PNG.sync.read(fs.readFileSync(compImgFile));
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console.log("* Reading the outline image...");
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var outlineImg = PNG.sync.read(fs.readFileSync(outlineImgFile));
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console.log("* Creating the final board image...");
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var boardImg = createBoardImg(pcbImg, outlineImg, compImg, compImgOffset);
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console.log("* Saving the board image...");
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fs.writeFileSync(boardImgFile, PNG.sync.write(boardImg, { colorType: 6 }));
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console.log("* Done! Exiting...");
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} catch(e) {
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if (e.message.indexOf("Cannot find module") !== -1) {
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console.error("Error! `pngjs` library is not installed? Try running `npm install --prefix ./bin/render_vrml`.");
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}
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console.log(e);
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process.exit(e.code);
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}
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