@ngageoint/geopackage
Version:
GeoPackage JavaScript Library
238 lines • 12.3 kB
JavaScript
;
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]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.CanvasKitCanvasAdapter = void 0;
var path_1 = __importDefault(require("path"));
var fs_1 = __importDefault(require("fs"));
var http_1 = __importDefault(require("http"));
var canvaskit_js_1 = __importDefault(require("../../canvaskit/canvaskit.js"));
var canvasUtils_1 = require("./canvasUtils");
/**
* Node based canvas creation
*/
var CanvasKitCanvasAdapter = /** @class */ (function () {
function CanvasKitCanvasAdapter() {
}
// allow user to set the locate file function, if they place it somewhere else
CanvasKitCanvasAdapter.setCanvasKitWasmLocateFile = function (locateFile) {
CanvasKitCanvasAdapter.canvasKitWasmLocateFile = locateFile;
};
// Let user set CanvasKit from outside of this module. i.e. they load it into their context and then pass the CanvasKit object to this adapter.
CanvasKitCanvasAdapter.setCanvasKit = function (CanvasKit) {
CanvasKitCanvasAdapter.CanvasKit = CanvasKit;
CanvasKitCanvasAdapter.initialized = true;
};
CanvasKitCanvasAdapter.prototype.initialize = function () {
return new Promise(function (resolve, reject) {
try {
(0, canvaskit_js_1.default)({
locateFile: CanvasKitCanvasAdapter.canvasKitWasmLocateFile
}).then(function (CanvasKit) {
CanvasKitCanvasAdapter.CanvasKit = CanvasKit;
CanvasKitCanvasAdapter.initialized = true;
resolve();
}).catch(function () {
reject('Failed to load the CanvasKit WebAssembly file at ' + CanvasKitCanvasAdapter.canvasKitWasmLocateFile('canvaskit.wasm') + '.\nUpdate file locator function using NodeCanvasAdapter.setCanvasKitWasmLocateFile.');
});
}
catch (e) {
reject('Failed to load the CanvasKit WebAssembly file at ' + CanvasKitCanvasAdapter.canvasKitWasmLocateFile('canvaskit.wasm') + '.\nUpdate file locator function using NodeCanvasAdapter.setCanvasKitWasmLocateFile.');
}
});
};
CanvasKitCanvasAdapter.prototype.isInitialized = function () {
return CanvasKitCanvasAdapter.initialized;
};
CanvasKitCanvasAdapter.prototype.create = function (width, height) {
return CanvasKitCanvasAdapter.CanvasKit.MakeCanvas(width, height);
};
/**
* Supports creating an image from file, base64 encoded image, image data buffer or url
* @param imageData
* @param contentType
*/
CanvasKitCanvasAdapter.prototype.createImage = function (imageData, contentType) {
return __awaiter(this, void 0, void 0, function () {
var src, image, width, height, e_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
src = imageData;
_a.label = 1;
case 1:
_a.trys.push([1, 7, , 8]);
if (!(typeof imageData === 'string')) return [3 /*break*/, 6];
if (!/^\s*data:/.test(imageData)) return [3 /*break*/, 2];
src = canvasUtils_1.CanvasUtils.base64toUInt8Array(imageData.split(',')[1]);
return [3 /*break*/, 6];
case 2:
if (!/^\s*https?:\/\//.test(imageData)) return [3 /*break*/, 4];
return [4 /*yield*/, new Promise(function (resolve, reject) {
http_1.default.get(imageData, function (res) {
var data = [];
if (res.statusCode === 200) {
res.on('data', function (chunk) {
data.push(chunk);
}).on('end', function () {
resolve(Buffer.concat(data).buffer);
}).on('error', function (e) {
reject(e);
});
}
else {
reject('Code: ' + res.statusCode);
}
});
})];
case 3:
src = _a.sent();
return [3 /*break*/, 6];
case 4: return [4 /*yield*/, new Promise(function (resolve, reject) {
fs_1.default.readFile(imageData, function (e, data) {
if (e) {
reject(e);
}
else {
resolve(data);
}
});
})];
case 5:
// imageData is a file path
src = _a.sent();
_a.label = 6;
case 6:
image = CanvasKitCanvasAdapter.CanvasKit.MakeImageFromEncoded(src);
if (image != null) {
width = image.width();
height = image.height();
}
return [3 /*break*/, 8];
case 7:
e_1 = _a.sent();
throw new Error('Failed to create image.');
case 8:
if (image == null) {
throw new Error('Failed to create image.');
}
return [2 /*return*/, { image: image, width: width, height: height }];
}
});
});
};
CanvasKitCanvasAdapter.prototype.createImageData = function (width, height) {
return new CanvasKitCanvasAdapter.CanvasKit.ImageData(width, height);
};
CanvasKitCanvasAdapter.prototype.disposeCanvas = function (canvas) {
if (canvas != null) {
canvas.dispose();
canvas = null;
}
};
CanvasKitCanvasAdapter.prototype.measureText = function (context, fontFace, fontSize, text) {
var font = new CanvasKitCanvasAdapter.CanvasKit.Font(null, fontSize);
var ids = font.getGlyphIDs(text);
var paint = new CanvasKitCanvasAdapter.CanvasKit.Paint();
paint.setStyle(CanvasKitCanvasAdapter.CanvasKit.PaintStyle.Fill);
var size = font.getGlyphWidths(ids, paint).reduce(function (a, b) {
return a + b;
}, 0);
paint.delete();
return size;
};
CanvasKitCanvasAdapter.prototype.drawText = function (context, text, location, fontFace, fontSize, fontColor) {
context.save();
context.fillStyle = fontColor;
context.font = fontSize + 'px \'' + fontFace + '\'';
context.textBaseline = 'middle';
var textWidth = this.measureText(context, fontFace, fontSize, text);
context.fillText(text, location[0] - textWidth / 2, location[1] + fontSize / 4);
context.restore();
};
CanvasKitCanvasAdapter.prototype.toDataURL = function (canvas, format) {
if (format === void 0) { format = 'image/png'; }
return Promise.resolve(canvas.toDataURL(format));
};
CanvasKitCanvasAdapter.prototype.scaleImage = function (image, scale) {
return __awaiter(this, void 0, void 0, function () {
var scaledWidth, scaledHeight;
return __generator(this, function (_a) {
scaledWidth = Math.round(scale * image.width);
scaledHeight = Math.round(scale * image.height);
return [2 /*return*/, this.scaleImageToDimensions(image, scaledWidth, scaledHeight)];
});
});
};
CanvasKitCanvasAdapter.prototype.scaleImageToDimensions = function (image, scaledWidth, scaledHeight) {
return __awaiter(this, void 0, void 0, function () {
var canvas, ctx, result, _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
canvas = this.create(scaledWidth, scaledHeight);
ctx = canvas.getContext('2d');
ctx.drawImage(image.image, 0, 0, scaledWidth, scaledHeight);
_a = this.createImage;
return [4 /*yield*/, this.toDataURL(canvas, 'image/png')];
case 1: return [4 /*yield*/, _a.apply(this, [_b.sent(), 'image/png'])];
case 2:
result = _b.sent();
this.disposeCanvas(canvas);
return [2 /*return*/, result];
}
});
});
};
CanvasKitCanvasAdapter.prototype.disposeImage = function (image) {
if (image != null && image.image && image.image.delete) {
image.image.delete();
image.image = null;
}
};
CanvasKitCanvasAdapter.initialized = false;
// default wasm locator
CanvasKitCanvasAdapter.canvasKitWasmLocateFile = function (filename) {
return path_1.default.join(__dirname, '..', '..', 'canvaskit', filename);
};
return CanvasKitCanvasAdapter;
}());
exports.CanvasKitCanvasAdapter = CanvasKitCanvasAdapter;
//# sourceMappingURL=canvasKitCanvasAdapter.js.map