Start @xterm scope with core and webgl addons

2023-11-01 06:44:26 -07:00
parent 4245283e05
commit add7f8133e
32 changed files with 34 additions and 34 deletions
@@ -0,0 +1,63 @@
+/**
+ * Copyright (c) 2018 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+import { throwIfFalsy } from 'browser/renderer/shared/RendererUtils';
+
+/**
+ * A matrix that when multiplies will translate 0-1 coordinates (left to right,
+ * top to bottom) to clip space.
+ */
+export const PROJECTION_MATRIX = new Float32Array([
+  2, 0, 0, 0,
+  0, -2, 0, 0,
+  0, 0, 1, 0,
+  -1, 1, 0, 1
+]);
+
+export function createProgram(gl: WebGLRenderingContext, vertexSource: string, fragmentSource: string): WebGLProgram | undefined {
+  const program = throwIfFalsy(gl.createProgram());
+  gl.attachShader(program, throwIfFalsy(createShader(gl, gl.VERTEX_SHADER, vertexSource)));
+  gl.attachShader(program, throwIfFalsy(createShader(gl, gl.FRAGMENT_SHADER, fragmentSource)));
+  gl.linkProgram(program);
+  const success = gl.getProgramParameter(program, gl.LINK_STATUS);
+  if (success) {
+    return program;
+  }
+
+  console.error(gl.getProgramInfoLog(program));
+  gl.deleteProgram(program);
+}
+
+export function createShader(gl: WebGLRenderingContext, type: number, source: string): WebGLShader | undefined {
+  const shader = throwIfFalsy(gl.createShader(type));
+  gl.shaderSource(shader, source);
+  gl.compileShader(shader);
+  const success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+  if (success) {
+    return shader;
+  }
+
+  console.error(gl.getShaderInfoLog(shader));
+  gl.deleteShader(shader);
+}
+
+export function expandFloat32Array(source: Float32Array, max: number): Float32Array {
+  const newLength = Math.min(source.length * 2, max);
+  const newArray = new Float32Array(newLength);
+  for (let i = 0; i < source.length; i++) {
+    newArray[i] = source[i];
+  }
+  return newArray;
+}
+
+export class GLTexture {
+  public texture: WebGLTexture;
+  public version: number;
+
+  constructor(texture: WebGLTexture) {
+    this.texture = texture;
+    this.version = -1;
+  }
+}