merchi_product_editor
Version:
A React component for editing product images using Fabric.js
187 lines (186 loc) • 8.54 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
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}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
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};
Object.defineProperty(exports, "__esModule", { value: true });
exports.loadPsdFromUrl = exports.generatePsdPreview = void 0;
var agPsd = __importStar(require("ag-psd"));
function generatePsdPreview(psdBuffer, imageUrl) {
return __awaiter(this, void 0, void 0, function () {
var uploadedImage, psd, designLayer, productLayer, overlayLayer, canvas, ctx, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 2, , 3]);
return [4 /*yield*/, loadImage(imageUrl)];
case 1:
uploadedImage = _a.sent();
psd = agPsd.readPsd(psdBuffer);
designLayer = findLayerByName(psd.children, 'Design');
productLayer = findLayerByName(psd.children, 'Product');
overlayLayer = findLayerByName(psd.children, 'Overlay');
if (!designLayer) {
throw new Error('Design layer not found in PSD');
}
canvas = document.createElement('canvas');
canvas.width = psd.width;
canvas.height = psd.height;
ctx = canvas.getContext('2d');
if (!ctx) {
throw new Error('Failed to get canvas 2d context');
}
// 1. draw the Product layer (bottom layer)
if (productLayer && productLayer.canvas) {
ctx.drawImage(productLayer.canvas, productLayer.left || 0, productLayer.top || 0);
}
// 2. draw the uploaded image to the Design layer position
drawImageToDesignLayer(ctx, uploadedImage, designLayer);
// 3. draw the Overlay layer
if (overlayLayer && overlayLayer.canvas) {
ctx.globalCompositeOperation = 'multiply';
ctx.globalAlpha = (overlayLayer.opacity || 255) / 255;
ctx.drawImage(overlayLayer.canvas, overlayLayer.left || 0, overlayLayer.top || 0);
ctx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = 1;
}
return [2 /*return*/, canvas.toDataURL('image/png')];
case 2:
error_1 = _a.sent();
console.error('Failed to generate PSD preview:', error_1);
throw error_1;
case 3: return [2 /*return*/];
}
});
});
}
exports.generatePsdPreview = generatePsdPreview;
/**
* find the layer by name
*/
function findLayerByName(layers, name) {
if (!layers)
return null;
for (var _i = 0, layers_1 = layers; _i < layers_1.length; _i++) {
var layer = layers_1[_i];
if (layer.name === name) {
return layer;
}
if (layer.children) {
var found = findLayerByName(layer.children, name);
if (found)
return found;
}
}
return null;
}
/**
* draw the uploaded image to the design layer position
*/
function drawImageToDesignLayer(ctx, image, designLayer) {
var left = designLayer.left || 0;
var top = designLayer.top || 0;
var width = (designLayer.right || 0) - left;
var height = (designLayer.bottom || 0) - top;
var aspectRatio = image.width / image.height;
var drawWidth = width;
var drawHeight = height;
if (aspectRatio > width / height) {
drawHeight = width / aspectRatio;
}
else {
drawWidth = height * aspectRatio;
}
var offsetX = left + (width - drawWidth) / 2;
var offsetY = top + (height - drawHeight) / 2;
ctx.drawImage(image, offsetX, offsetY, drawWidth, drawHeight);
}
/**
* load image
*/
function loadImage(url) {
return new Promise(function (resolve, reject) {
var img = new Image();
img.onload = function () { return resolve(img); };
img.onerror = function () { return reject(new Error('Failed to load image')); };
img.crossOrigin = 'anonymous';
img.src = url;
});
}
/**
* load PSD file and return ArrayBuffer
* for loading PSD from URL
*/
function loadPsdFromUrl(url) {
return __awaiter(this, void 0, void 0, function () {
var response;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, fetch(url)];
case 1:
response = _a.sent();
if (!response.ok) {
throw new Error("Failed to load PSD: ".concat(response.statusText));
}
return [4 /*yield*/, response.arrayBuffer()];
case 2: return [2 /*return*/, _a.sent()];
}
});
});
}
exports.loadPsdFromUrl = loadPsdFromUrl;