createTexture static method

Future<FlutterAngleTexture> createTexture(AngleOptions options)

Implementation

static Future<FlutterAngleTexture> createTexture(AngleOptions options) async {
  final textureTarget = GL_TEXTURE_2D;
  final height = (options.height*options.dpr).toInt();
  final width = (options.width*options.dpr).toInt();
  final result = await _channel.invokeMethod('createTexture', {"width": width, "height": height,});

  if (Platform.isAndroid) {
    final newTexture = FlutterAngleTexture.fromMap(result, null, 0, options);
    _rawOpenGl.glViewport(0, 0, width, height);

    if(!options.customRenderer){
      worker = RenderWorker(newTexture);
    }

    return newTexture;
  }

  Pointer<Uint32> fbo = calloc();
  _rawOpenGl.glGenFramebuffers(1, fbo);
  _rawOpenGl.glBindFramebuffer(GL_FRAMEBUFFER, fbo.value);

  final newTexture = FlutterAngleTexture.fromMap(result, null, fbo.value, options);
  angleConsole.info(newTexture.toMap());
  angleConsole.info(_rawOpenGl.glGetError());
  _rawOpenGl.glActiveTexture(WebGL.TEXTURE0);

  if (newTexture.metalAsGLTextureId != 0) {
    // Draw to metal interop texture directly
    _rawOpenGl.glBindTexture(textureTarget, newTexture.metalAsGLTextureId);
    _rawOpenGl.glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, textureTarget, newTexture.metalAsGLTextureId, 0);
  }
  else {
    _rawOpenGl.glBindRenderbuffer(GL_RENDERBUFFER, newTexture.rboId);
    _rawOpenGl.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, newTexture.rboId);
  }

  var frameBufferCheck = _rawOpenGl.glCheckFramebufferStatus(GL_FRAMEBUFFER);
  if (frameBufferCheck != GL_FRAMEBUFFER_COMPLETE) {
    angleConsole.error("Framebuffer (color) check failed: $frameBufferCheck");
  }

  _rawOpenGl.glViewport(0, 0, width, height);

  Pointer<Int32> depthBuffer = calloc();
  _rawOpenGl.glGenRenderbuffers(1, depthBuffer.cast());
  _rawOpenGl.glBindRenderbuffer(GL_RENDERBUFFER, depthBuffer.value);
  _rawOpenGl.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);//,GL_DEPTH_COMPONENT16//GL_DEPTH24_STENCIL8

  _rawOpenGl.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthBuffer.value);

  frameBufferCheck = _rawOpenGl.glCheckFramebufferStatus(GL_FRAMEBUFFER);
  if (frameBufferCheck != GL_FRAMEBUFFER_COMPLETE) {
    angleConsole.error("Framebuffer (depth) check failed: $frameBufferCheck");
  }

  _activeFramebuffer = fbo.value;

  calloc.free(depthBuffer);
  calloc.free(fbo);

  if(!options.customRenderer){
    worker = RenderWorker(newTexture);
  }

  return newTexture;
}