Merge "Remove framebuffer_target" into oc-dev am: c6c0c9c7

// Offset before vsync to submit frames to hardware composer.

constexpr int64_t kFramePostOffsetNs = 4000000;  // 4ms

constexpr size_t kDefaultDisplayConfigCount = 32;

constexpr float kMetersPerInch = 0.0254f;

const char kBacklightBrightnessSysFile[] =

    "/sys/class/leds/lcd-backlight/brightness";

const char kRightEyeOffsetProperty[] = "dvr.right_eye_offset_ns";

// Returns our best guess for the time the compositor will spend rendering the

// next frame.

int64_t GuessFrameTime(int compositor_visible_layer_count) {

  // The cost of asynchronous EDS and lens warp is currently measured at 2.5ms

  // for one layer and 7ms for two layers, but guess a higher frame time to

  // account for CPU overhead. This guess is only used before we've measured the

  // actual time to render a frame for the current compositor configuration.

  switch (compositor_visible_layer_count) {

    case 0:

      return 500000;  // .5ms

    case 1:

      return 5000000;  // 5ms

    default:

      return 10500000;  // 10.5ms

  }

}

// Get time offset from a vsync to when the pose for that vsync should be

// predicted out to. For example, if scanout gets halfway through the frame

// at the halfway point between vsyncs, then this could be half the period.

}

void HardwareComposer::OnPostThreadResumed() {

  constexpr int format = HAL_PIXEL_FORMAT_RGBA_8888;

  constexpr int usage =

      GRALLOC_USAGE_HW_FB | GRALLOC_USAGE_HW_COMPOSER | GRALLOC_USAGE_HW_RENDER;

  framebuffer_target_ = std::make_shared<IonBuffer>(

      native_display_metrics_.width, native_display_metrics_.height, format,

      usage);

  hwc2_hidl_->resetCommands();

  // Connect to pose service.

}

void HardwareComposer::OnPostThreadPaused() {

  framebuffer_target_.reset();

  retire_fence_fds_.clear();

  display_surfaces_.clear();

  // Transform required to get from native to logical display orientation.

  HWC::Transform display_transform_ = HWC::Transform::None;

  // Buffer for the background layer required by hardware composer.

  std::shared_ptr<IonBuffer> framebuffer_target_;

  // Pending surface list. Set by the display service when DirectSurfaces are

  // added, removed, or change visibility. Written by the message dispatch

  // thread and read by the post thread.