message: filter slot for textures
diff: @@ -257,20 +257,22 @@ export default class FilterManager extends WebGLManager
  renderer.bindShader(shader);
  + // free unit 0 for us, doesn't matter what was there
  + // don't try to restore it, because syncUniforms can upload it to another slot
  + // and it'll be a problem
  + const tex = this.renderer.emptyTextures[0];
  +
  + this.renderer.boundTextures[0] = tex;
  // this syncs the pixi filters uniforms with glsl uniforms
  this.syncUniforms(shader, filter);
  renderer.state.setBlendMode(filter.blendMode);
  - // temporary bypass cache..
  - const tex = this.renderer.boundTextures[0];
  -
  gl.activeTexture(gl.TEXTURE0);
  gl.bindTexture(gl.TEXTURE_2D, input.texture.texture);
  this.quad.vao.draw(this.renderer.gl.TRIANGLES, 6, 0);
  - // restore cache.
  gl.bindTexture(gl.TEXTURE_2D, tex._glTextures[this.renderer.CONTEXT_UID].texture);
  }
  