@danehansen/image-data-reader
Version:
ImageData interface
120 lines (113 loc) • 10.5 kB
JavaScript
/*
* ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development").
* This devtool is neither made for production nor for readable output files.
* It uses "eval()" calls to create a separate source file in the browser devtools.
* If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
* or disable the default devtool with "devtool: false".
* If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
*/
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exports["danehansen"] = factory(require("@danehansen/math"));
else
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/***/ "./src/ImageDataReader.js":
/*!********************************!*\
!*** ./src/ImageDataReader.js ***!
\********************************/
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {
eval("__webpack_require__.r(__webpack_exports__);\n/* harmony export */ __webpack_require__.d(__webpack_exports__, {\n/* harmony export */ \"WHITE_BRIGHTNESS\": () => (/* binding */ WHITE_BRIGHTNESS),\n/* harmony export */ \"red\": () => (/* binding */ _red),\n/* harmony export */ \"green\": () => (/* binding */ _green),\n/* harmony export */ \"blue\": () => (/* binding */ _blue),\n/* harmony export */ \"opacity\": () => (/* binding */ _opacity),\n/* harmony export */ \"brightness\": () => (/* binding */ _brightness),\n/* harmony export */ \"default\": () => (/* binding */ ImageDataReader)\n/* harmony export */ });\n/* harmony import */ var _danehansen_math__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(/*! @danehansen/math */ \"@danehansen/math\");\n/* harmony import */ var _danehansen_math__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_danehansen_math__WEBPACK_IMPORTED_MODULE_0__);\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\n\nfunction _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if (\"value\" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }\n\nfunction _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }\n\n\nvar WHITE_BRIGHTNESS = 255 * 3;\n\nfunction _red(data, width, x, y) {\n return data[(y * width + x) * 4];\n}\n\n\n\nfunction _green(data, width, x, y) {\n return data[(y * width + x) * 4 + 1];\n}\n\n\n\nfunction _blue(data, width, x, y) {\n return data[(y * width + x) * 4 + 2];\n}\n\n\n\nfunction _opacity(data, width, x, y) {\n return data[(y * width + x) * 4 + 3];\n}\n\n\n\nfunction _brightness(data, width, x, y) {\n return _red(data, width, x, y) + _blue(data, width, x, y) + _green(data, width, x, y);\n}\n\n\n\nvar ImageDataReader = /*#__PURE__*/function () {\n function ImageDataReader(src, srcCrop, destWidth, destHeight) {\n _classCallCheck(this, ImageDataReader);\n\n this._src = src;\n this._srcCrop = srcCrop || {\n x: 0,\n y: 0,\n width: src.videoWidth || src.width,\n height: src.videoHeight || src.height\n };\n this._destWidth = destWidth || this._srcCrop.width;\n this._destHeight = destHeight || this._srcCrop.height;\n this._canvas = document.createElement(\"canvas\");\n this._context = this._canvas.getContext(\"2d\");\n this._canvas.width = this._destWidth;\n this._canvas.height = this._destHeight;\n this.update();\n }\n\n _createClass(ImageDataReader, [{\n key: \"update\",\n value: function update() {\n this._context.drawImage(this._src, this._srcCrop.x, this._srcCrop.y, this._srcCrop.width, this._srcCrop.height, 0, 0, this._destWidth, this._destHeight);\n\n this.data = this._context.getImageData(0, 0, this._destWidth, this._destHeight).data;\n }\n }, {\n key: \"red\",\n value: function red(x, y) {\n return _red(this.data, this._destWidth, x, y);\n }\n }, {\n key: \"green\",\n value: function green(x, y) {\n return _green(this.data, this._destWidth, x, y);\n }\n }, {\n key: \"blue\",\n value: function blue(x, y) {\n return _blue(this.data, this._destWidth, x, y);\n }\n }, {\n key: \"opacity\",\n value: function opacity(x, y) {\n return _opacity(this.data, this._destWidth, x, y);\n }\n }, {\n key: \"brightness\",\n value: function brightness(x, y) {\n var b = _brightness(this.data, this._destWidth, x, y); // if (this._shouldAdjust) {\n // if (b < this._avg) {\n // b = Math.round(\n // (normalize(this._low, this._avg, b) / 2) * WHITE_BRIGHTNESS\n // );\n // } else {\n // b = Math.round(\n // (normalize(this._avg, this._high, b) / 2) * WHITE_BRIGHTNESS +\n // Math.floor(WHITE_BRIGHTNESS / 2)\n // );\n // }\n // }\n\n\n if (this._shouldAdjust) {\n b = Math.round((0,_danehansen_math__WEBPACK_IMPORTED_MODULE_0__.normalize)(this._low, this._high, b) * WHITE_BRIGHTNESS);\n }\n\n return b;\n }\n }, {\n key: \"adjustContrast\",\n value: function adjustContrast(reset) {\n if (reset) {\n this._shouldAdjust = false;\n } else {\n this._low = WHITE_BRIGHTNESS;\n this._high = 0; // this._avg = 0;\n\n for (var i = 0, length = this.data.length; i < length; i += 4) {\n var b = this.data[i] + this.data[i + 1] + this.data[i + 2]; // this._avg += b;\n\n this._high = Math.max(this._high, b);\n this._low = Math.min(this._low, b);\n } // this._avg = Math.round(this._avg / (this._destWidth * this._destHeight));\n\n\n this._shouldAdjust = this._low !== 0 || this._high !== WHITE_BRIGHTNESS; /// ||\n // this._avg !== Math.floor(WHITE_BRIGHTNESS / 2);\n\n this._shouldAdjust = true;\n }\n }\n }]);\n\n return ImageDataReader;\n}();\n\n\n\n//# sourceURL=webpack://danehansen.ImageDataReader/./src/ImageDataReader.js?");
/***/ }),
/***/ "@danehansen/math":
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