Merge pull request #1790 from Tyriar/webgl2

WebGL Renderer

addons/xterm-addon-webgl/.gitignore

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+lib
+node_modules

addons/xterm-addon-webgl/.npmignore

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+**/*.api.js
+**/*.api.ts
+tsconfig.json
+.yarnrc
+webpack.config.js

addons/xterm-addon-webgl/LICENSE

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+Copyright (c) 2018, The xterm.js authors (https://github.com/xtermjs/xterm.js)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

addons/xterm-addon-webgl/package.json

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+{
+  "name": "xterm-addon-webgl",
+  "version": "0.1.0",
+  "author": {
+    "name": "The xterm.js authors",
+    "url": "https://xtermjs.org/"
+  },
+  "main": "lib/xterm-addon-webgl.js",
+  "types": "typings/xterm-addon-webgl.d.ts",
+  "license": "MIT",
+  "scripts": {
+    "build": "../../node_modules/.bin/tsc -p src",
+    "prepackage": "npm run build",
+    "package": "../../node_modules/.bin/webpack",
+    "prepublishOnly": "npm run package"
+  },
+  "peerDependencies": {
+    "xterm": "^3.14.0"
+  }
+}

addons/xterm-addon-webgl/src/CharDataCompat.ts

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+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { CellData } from 'common/buffer/CellData';
+import { FLAGS } from './Constants';
+import { IBufferLine } from 'common/Types';
+
+export function getCompatAttr(bufferLine: IBufferLine, index: number): number {
+  // TODO: Need to move WebGL over to the new system and remove this block
+  const cell = new CellData();
+  bufferLine.loadCell(index, cell);
+  const oldBg = cell.getBgColor() === -1 ? 256 : cell.getBgColor();
+  const oldFg = cell.getFgColor() === -1 ? 256 : cell.getFgColor();
+  const oldAttr =
+    (cell.isBold() ? FLAGS.BOLD : 0) |
+    (cell.isUnderline() ? FLAGS.UNDERLINE : 0) |
+    (cell.isBlink() ? FLAGS.BLINK : 0) |
+    (cell.isInverse() ? FLAGS.INVERSE : 0) |
+    (cell.isDim() ? FLAGS.DIM : 0) |
+    (cell.isItalic() ? FLAGS.ITALIC : 0);
+  const attrCompat =
+    oldBg |
+    (oldFg << 9) |
+    (oldAttr << 18);
+  return attrCompat;
+}

addons/xterm-addon-webgl/src/ColorUtils.ts

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+/**
+ * @license MIT
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ */
+
+import { IColor } from 'browser/Types';
+
+export function getLuminance(color: IColor): number {
+  // Coefficients taken from: https://www.w3.org/TR/AERT/#color-contrast
+  const r = color.rgba >> 24 & 0xff;
+  const g = color.rgba >> 16 & 0xff;
+  const b = color.rgba >> 8 & 0xff;
+  return (0.299 * r + 0.587 * g + 0.114 * b) / 255;
+}

addons/xterm-addon-webgl/src/Constants.ts

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+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+// TODO: Should be removed after chardata workaround is fixed
+export const enum FLAGS {
+  BOLD = 1,
+  UNDERLINE = 2,
+  BLINK = 4,
+  INVERSE = 8,
+  INVISIBLE = 16,
+  DIM = 32,
+  ITALIC = 64
+}