Daniel Imms
e07b9684bb
Using canvases on Electron (and plain Chromium I believe), when resuming from sleep the graphics card may release the texture which results in the terminal display and char atlas being corrupt. This API allows the consumer to clear the texture atlas right after resuming, atlas warm up is not done to simplify this process because the fact that atlases are shared between multiple terminals complicates this. Related microsoft/vscode#69665
58 lines
1.5 KiB
TypeScript
58 lines
1.5 KiB
TypeScript
/**
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* Copyright (c) 2018 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { IRenderModel, ISelectionRenderModel } from './Types';
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import { fill } from 'common/TypedArrayUtils';
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export const RENDER_MODEL_INDICIES_PER_CELL = 3;
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export const RENDER_MODEL_BG_OFFSET = 1;
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export const RENDER_MODEL_FG_OFFSET = 2;
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export const COMBINED_CHAR_BIT_MASK = 0x80000000;
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export class RenderModel implements IRenderModel {
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public cells: Uint32Array;
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public lineLengths: Uint32Array;
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public selection: ISelectionRenderModel;
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constructor() {
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this.cells = new Uint32Array(0);
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this.lineLengths = new Uint32Array(0);
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this.selection = {
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hasSelection: false,
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columnSelectMode: false,
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viewportStartRow: 0,
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viewportEndRow: 0,
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viewportCappedStartRow: 0,
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viewportCappedEndRow: 0,
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startCol: 0,
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endCol: 0
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};
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}
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public resize(cols: number, rows: number): void {
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const indexCount = cols * rows * RENDER_MODEL_INDICIES_PER_CELL;
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if (indexCount !== this.cells.length) {
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this.cells = new Uint32Array(indexCount);
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this.lineLengths = new Uint32Array(rows);
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}
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}
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public clear(): void {
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fill(this.cells, 0, 0);
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fill(this.lineLengths, 0, 0);
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}
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public clearSelection(): void {
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this.selection.hasSelection = false;
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this.selection.viewportStartRow = 0;
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this.selection.viewportEndRow = 0;
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this.selection.viewportCappedStartRow = 0;
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this.selection.viewportCappedEndRow = 0;
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this.selection.startCol = 0;
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this.selection.endCol = 0;
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}
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}
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