C++ (Cpp) PrepareLayerStack Examples

Example #1

File: hwc_display_primary.cpp Project: MIPS/hardware-qcom-display

HWC2::Error HWCDisplayPrimary::Validate(uint32_t *out_num_types, uint32_t *out_num_requests) {
  auto status = HWC2::Error::None;
  DisplayError error = kErrorNone;

  if (display_paused_) {
    MarkLayersForGPUBypass();
    return status;
  }

  if (color_tranform_failed_) {
    // Must fall back to client composition
    MarkLayersForClientComposition();
  }

  // Fill in the remaining blanks in the layers and add them to the SDM layerstack
  BuildLayerStack();
  // Checks and replaces layer stack for solid fill
  SolidFillPrepare();

  bool pending_output_dump = dump_frame_count_ && dump_output_to_file_;

  if (frame_capture_buffer_queued_ || pending_output_dump) {
    // RHS values were set in FrameCaptureAsync() called from a binder thread. They are picked up
    // here in a subsequent draw round.
    layer_stack_.output_buffer = &output_buffer_;
    layer_stack_.flags.post_processed_output = post_processed_output_;
  }

  bool one_updating_layer = SingleLayerUpdating();
  ToggleCPUHint(one_updating_layer);

  uint32_t refresh_rate = GetOptimalRefreshRate(one_updating_layer);
  if (current_refresh_rate_ != refresh_rate) {
    error = display_intf_->SetRefreshRate(refresh_rate);
  }

  if (error == kErrorNone) {
    // On success, set current refresh rate to new refresh rate
    current_refresh_rate_ = refresh_rate;
  }

  if (handle_idle_timeout_) {
    handle_idle_timeout_ = false;
  }

  if (layer_set_.empty()) {
    flush_ = true;
    return status;
  }

  status = PrepareLayerStack(out_num_types, out_num_requests);
  return status;
}

Example #2

File: hwc_display_external.cpp Project: myfluxi/android_hardware_qcom_display

int HWCDisplayExternal::Prepare(hwc_display_contents_1_t *content_list) {
  int status = 0;

  status = AllocateLayerStack(content_list);
  if (status) {
    return status;
  }

  status = PrepareLayerStack(content_list);
  if (status) {
    return status;
  }

  return 0;
}