@phaserjs/phaser/renderer/webgl1/renderpass/BindFramebuffer.js

Phaser 4

import { CurrentFramebuffer } from "./CurrentFramebuffer";
import { FramebufferStack } from "./FramebufferStack";
import { SetViewport } from "./SetViewport";
import { gl } from "../GL";
export function BindFramebuffer(clear = true, entry) {
  if (!entry) {
    entry = CurrentFramebuffer();
  }
  const { framebuffer, viewport } = entry;
  if (FramebufferStack.active !== framebuffer) {
    gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
  }
  if (clear) {
    gl.clearColor(0, 0, 0, 0);
    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
  }
  if (viewport) {
    SetViewport(viewport.x, viewport.y, viewport.width, viewport.height);
  }
  FramebufferStack.active = framebuffer;
}