face-api.js
Version:
JavaScript API for face detection and face recognition in the browser with tensorflow.js
80 lines • 4.31 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var getContext2dOrThrow_1 = require("../dom/getContext2dOrThrow");
var resolveInput_1 = require("../dom/resolveInput");
var AnchorPosition;
(function (AnchorPosition) {
AnchorPosition["TOP_LEFT"] = "TOP_LEFT";
AnchorPosition["TOP_RIGHT"] = "TOP_RIGHT";
AnchorPosition["BOTTOM_LEFT"] = "BOTTOM_LEFT";
AnchorPosition["BOTTOM_RIGHT"] = "BOTTOM_RIGHT";
})(AnchorPosition = exports.AnchorPosition || (exports.AnchorPosition = {}));
var DrawTextFieldOptions = /** @class */ (function () {
function DrawTextFieldOptions(options) {
if (options === void 0) { options = {}; }
var anchorPosition = options.anchorPosition, backgroundColor = options.backgroundColor, fontColor = options.fontColor, fontSize = options.fontSize, fontStyle = options.fontStyle, padding = options.padding;
this.anchorPosition = anchorPosition || AnchorPosition.TOP_LEFT;
this.backgroundColor = backgroundColor || 'rgba(0, 0, 0, 0.5)';
this.fontColor = fontColor || 'rgba(255, 255, 255, 1)';
this.fontSize = fontSize || 14;
this.fontStyle = fontStyle || 'Georgia';
this.padding = padding || 4;
}
return DrawTextFieldOptions;
}());
exports.DrawTextFieldOptions = DrawTextFieldOptions;
var DrawTextField = /** @class */ (function () {
function DrawTextField(text, anchor, options) {
if (options === void 0) { options = {}; }
this.text = typeof text === 'string'
? [text]
: (text instanceof DrawTextField ? text.text : text);
this.anchor = anchor;
this.options = new DrawTextFieldOptions(options);
}
DrawTextField.prototype.measureWidth = function (ctx) {
var padding = this.options.padding;
return this.text.map(function (l) { return ctx.measureText(l).width; }).reduce(function (w0, w1) { return w0 < w1 ? w1 : w0; }, 0) + (2 * padding);
};
DrawTextField.prototype.measureHeight = function () {
var _a = this.options, fontSize = _a.fontSize, padding = _a.padding;
return this.text.length * fontSize + (2 * padding);
};
DrawTextField.prototype.getUpperLeft = function (ctx, canvasDims) {
var anchorPosition = this.options.anchorPosition;
var isShiftLeft = anchorPosition === AnchorPosition.BOTTOM_RIGHT || anchorPosition === AnchorPosition.TOP_RIGHT;
var isShiftTop = anchorPosition === AnchorPosition.BOTTOM_LEFT || anchorPosition === AnchorPosition.BOTTOM_RIGHT;
var textFieldWidth = this.measureWidth(ctx);
var textFieldHeight = this.measureHeight();
var x = (isShiftLeft ? this.anchor.x - textFieldWidth : this.anchor.x);
var y = isShiftTop ? this.anchor.y - textFieldHeight : this.anchor.y;
// adjust anchor if text box exceeds canvas borders
if (canvasDims) {
var width = canvasDims.width, height = canvasDims.height;
var newX = Math.max(Math.min(x, width - textFieldWidth), 0);
var newY = Math.max(Math.min(y, height - textFieldHeight), 0);
return { x: newX, y: newY };
}
return { x: x, y: y };
};
DrawTextField.prototype.draw = function (canvasArg) {
var canvas = resolveInput_1.resolveInput(canvasArg);
var ctx = getContext2dOrThrow_1.getContext2dOrThrow(canvas);
var _a = this.options, backgroundColor = _a.backgroundColor, fontColor = _a.fontColor, fontSize = _a.fontSize, fontStyle = _a.fontStyle, padding = _a.padding;
ctx.font = fontSize + "px " + fontStyle;
var maxTextWidth = this.measureWidth(ctx);
var textHeight = this.measureHeight();
ctx.fillStyle = backgroundColor;
var upperLeft = this.getUpperLeft(ctx, canvas);
ctx.fillRect(upperLeft.x, upperLeft.y, maxTextWidth, textHeight);
ctx.fillStyle = fontColor;
this.text.forEach(function (textLine, i) {
var x = padding + upperLeft.x;
var y = padding + upperLeft.y + ((i + 1) * fontSize);
ctx.fillText(textLine, x, y);
});
};
return DrawTextField;
}());
exports.DrawTextField = DrawTextField;
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