95 lines
2 KiB
TypeScript
95 lines
2 KiB
TypeScript
|
/**
|
||
|
|
* Color represented by RGB (0.0-1.0) components
|
||
|
|
*/
|
||
|
|
export type Color = {
|
||
|
|
r: number;
|
||
|
|
g: number;
|
||
|
|
b: number;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Displayable character, with background and foreground color taken from the palette
|
||
|
|
*/
|
||
|
|
export type Char = Readonly<{
|
||
|
|
ch: string;
|
||
|
|
bg: number;
|
||
|
|
fg: number;
|
||
|
|
}>;
|
||
|
|
|
||
|
|
export type BufferSize = Readonly<{ w: number; h: number }>;
|
||
|
|
export type BufferLocation = Readonly<{ x: number; y: number }>;
|
||
|
|
|
||
|
|
export const SPACE: Char = { ch: " ", bg: 0, fg: 0 } as const;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rectangular buffer of displayable characters
|
||
|
|
*/
|
||
|
|
export class CharBuffer {
|
||
|
|
private chars: Array<Char>;
|
||
|
|
|
||
|
|
constructor(private size: BufferSize) {
|
||
|
|
this.chars = new Array(size.w * size.h).fill(SPACE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the character buffered at a given at
|
||
|
|
*
|
||
|
|
* This does not properly check for out-of-bounds coordinates,
|
||
|
|
* use BufferDrawing for this
|
||
|
|
*/
|
||
|
|
get(at: BufferLocation): Char {
|
||
|
|
const i = at.y * this.size.w + at.x;
|
||
|
|
if (i > 0 && i < this.chars.length) {
|
||
|
|
return this.chars[i];
|
||
|
|
} else {
|
||
|
|
return SPACE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Change the character buffered at a given location
|
||
|
|
*
|
||
|
|
* This does not properly check for out-of-bounds coordinates,
|
||
|
|
* use BufferDrawing for this
|
||
|
|
*/
|
||
|
|
set(at: BufferLocation, char: Char): void {
|
||
|
|
const i = at.y * this.size.w + at.x;
|
||
|
|
if (i >= 0 && i < this.chars.length) {
|
||
|
|
this.chars[i] = char;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
getSize(): BufferSize {
|
||
|
|
return this.size;
|
||
|
|
}
|
||
|
|
|
||
|
|
toString(): string {
|
||
|
|
return this.chars.map((c) => c.ch).join("");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Tools for drawing inside a display buffer
|
||
|
|
*/
|
||
|
|
export class BufferDrawing {
|
||
|
|
constructor(private readonly buffer: CharBuffer) {
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Draw a piece of text of the same color
|
||
|
|
*/
|
||
|
|
text(content: string, from: BufferLocation): void {
|
||
|
|
let { w, h } = this.buffer.getSize();
|
||
|
|
let { x, y } = from;
|
||
|
|
let buf = this.buffer;
|
||
|
|
if (y >= 0 && y < h) {
|
||
|
|
for (let ch of content) {
|
||
|
|
if (x >= 0 && x < w) {
|
||
|
|
buf.set({ x, y }, { ch, bg: 0, fg: 0 });
|
||
|
|
}
|
||
|
|
x++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|