// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/test/fake_output_surface.h"

#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "cc/output/compositor_frame_ack.h"
#include "cc/output/output_surface_client.h"
#include "cc/resources/returned_resource.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {

FakeOutputSurface::FakeOutputSurface(
    scoped_refptr<ContextProvider> context_provider,
    bool delegated_rendering)
    : OutputSurface(context_provider),
      client_(NULL),
      num_sent_frames_(0),
      needs_begin_impl_frame_(false),
      forced_draw_to_software_device_(false),
      has_external_stencil_test_(false),
      fake_weak_ptr_factory_(this) {
  if (delegated_rendering) {
    capabilities_.delegated_rendering = true;
    capabilities_.max_frames_pending = 1;
  }
}

FakeOutputSurface::FakeOutputSurface(
    scoped_ptr<SoftwareOutputDevice> software_device,
    bool delegated_rendering)
    : OutputSurface(software_device.Pass()),
      client_(NULL),
      num_sent_frames_(0),
      forced_draw_to_software_device_(false),
      has_external_stencil_test_(false),
      fake_weak_ptr_factory_(this) {
  if (delegated_rendering) {
    capabilities_.delegated_rendering = true;
    capabilities_.max_frames_pending = 1;
  }
}

FakeOutputSurface::FakeOutputSurface(
    scoped_refptr<ContextProvider> context_provider,
    scoped_ptr<SoftwareOutputDevice> software_device,
    bool delegated_rendering)
    : OutputSurface(context_provider, software_device.Pass()),
      client_(NULL),
      num_sent_frames_(0),
      forced_draw_to_software_device_(false),
      has_external_stencil_test_(false),
      fake_weak_ptr_factory_(this) {
  if (delegated_rendering) {
    capabilities_.delegated_rendering = true;
    capabilities_.max_frames_pending = 1;
  }
}

FakeOutputSurface::~FakeOutputSurface() {}

void FakeOutputSurface::SwapBuffers(CompositorFrame* frame) {
  if (frame->software_frame_data || frame->delegated_frame_data ||
      !context_provider()) {
    frame->AssignTo(&last_sent_frame_);

    if (last_sent_frame_.delegated_frame_data) {
      resources_held_by_parent_.insert(
          resources_held_by_parent_.end(),
          last_sent_frame_.delegated_frame_data->resource_list.begin(),
          last_sent_frame_.delegated_frame_data->resource_list.end());
    }

    ++num_sent_frames_;
    PostSwapBuffersComplete();
    DidSwapBuffers();
  } else {
    OutputSurface::SwapBuffers(frame);
    frame->AssignTo(&last_sent_frame_);
    ++num_sent_frames_;
  }
}

void FakeOutputSurface::SetNeedsBeginImplFrame(bool enable) {
  needs_begin_impl_frame_ = enable;
  OutputSurface::SetNeedsBeginImplFrame(enable);

  // If there is not BeginImplFrame emulation from the FrameRateController,
  // then we just post a BeginImplFrame to emulate it as part of the test.
  if (enable && !frame_rate_controller_) {
    base::MessageLoop::current()->PostDelayedTask(
        FROM_HERE, base::Bind(&FakeOutputSurface::OnBeginImplFrame,
                              fake_weak_ptr_factory_.GetWeakPtr()),
        base::TimeDelta::FromMilliseconds(16));
  }
}

void FakeOutputSurface::OnBeginImplFrame() {
  OutputSurface::BeginImplFrame(BeginFrameArgs::CreateForTesting());
}


bool FakeOutputSurface::ForcedDrawToSoftwareDevice() const {
  return forced_draw_to_software_device_;
}

bool FakeOutputSurface::BindToClient(OutputSurfaceClient* client) {
  if (OutputSurface::BindToClient(client)) {
    client_ = client;
    if (memory_policy_to_set_at_bind_) {
      client_->SetMemoryPolicy(*memory_policy_to_set_at_bind_.get());
      memory_policy_to_set_at_bind_.reset();
    }
    return true;
  } else {
    return false;
  }
}

void FakeOutputSurface::SetTreeActivationCallback(
    const base::Closure& callback) {
  DCHECK(client_);
  client_->SetTreeActivationCallback(callback);
}

void FakeOutputSurface::ReturnResource(unsigned id, CompositorFrameAck* ack) {
  TransferableResourceArray::iterator it;
  for (it = resources_held_by_parent_.begin();
       it != resources_held_by_parent_.end();
       ++it) {
    if (it->id == id)
      break;
  }
  DCHECK(it != resources_held_by_parent_.end());
  ack->resources.push_back(it->ToReturnedResource());
  resources_held_by_parent_.erase(it);
}

bool FakeOutputSurface::HasExternalStencilTest() const {
  return has_external_stencil_test_;
}

void FakeOutputSurface::SetMemoryPolicyToSetAtBind(
    scoped_ptr<cc::ManagedMemoryPolicy> memory_policy_to_set_at_bind) {
  memory_policy_to_set_at_bind_.swap(memory_policy_to_set_at_bind);
}

}  // namespace cc