// Copyright 2018 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 "gpu/command_buffer/service/shared_image_factory.h"

#include <inttypes.h>

#include "base/strings/stringprintf.h"
#include "base/trace_event/memory_dump_manager.h"
#include "components/viz/common/resources/resource_format_utils.h"
#include "gpu/command_buffer/common/gpu_memory_buffer_support.h"
#include "gpu/command_buffer/common/shared_image_trace_utils.h"
#include "gpu/command_buffer/common/shared_image_usage.h"
#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
#include "gpu/command_buffer/service/image_factory.h"
#include "gpu/command_buffer/service/mailbox_manager.h"
#include "gpu/command_buffer/service/service_utils.h"
#include "gpu/command_buffer/service/shared_image_backing.h"
#include "gpu/command_buffer/service/shared_image_backing_factory_gl_texture.h"
#include "gpu/command_buffer/service/shared_image_manager.h"
#include "gpu/command_buffer/service/shared_image_representation.h"
#include "gpu/command_buffer/service/wrapped_sk_image.h"
#include "gpu/config/gpu_preferences.h"
#include "ui/gl/trace_util.h"

namespace gpu {
// Overrides for flat_set lookups:
bool operator<(
    const std::unique_ptr<SharedImageRepresentationFactoryRef>& lhs,
    const std::unique_ptr<SharedImageRepresentationFactoryRef>& rhs) {
  return lhs->mailbox() < rhs->mailbox();
}

bool operator<(
    const Mailbox& lhs,
    const std::unique_ptr<SharedImageRepresentationFactoryRef>& rhs) {
  return lhs < rhs->mailbox();
}

bool operator<(const std::unique_ptr<SharedImageRepresentationFactoryRef>& lhs,
               const Mailbox& rhs) {
  return lhs->mailbox() < rhs;
}

SharedImageFactory::SharedImageFactory(
    const GpuPreferences& gpu_preferences,
    const GpuDriverBugWorkarounds& workarounds,
    const GpuFeatureInfo& gpu_feature_info,
    raster::RasterDecoderContextState* context_state,
    MailboxManager* mailbox_manager,
    SharedImageManager* shared_image_manager,
    ImageFactory* image_factory,
    MemoryTracker* memory_tracker)
    : mailbox_manager_(mailbox_manager),
      shared_image_manager_(shared_image_manager),
      memory_tracker_(std::make_unique<MemoryTypeTracker>(memory_tracker)),
      backing_factory_(
          std::make_unique<SharedImageBackingFactoryGLTexture>(gpu_preferences,
                                                               workarounds,
                                                               gpu_feature_info,
                                                               image_factory)),
      wrapped_sk_image_factory_(
          gpu_preferences.enable_raster_to_sk_image
              ? std::make_unique<raster::WrappedSkImageFactory>(context_state)
              : nullptr) {}

SharedImageFactory::~SharedImageFactory() {
  DCHECK(shared_images_.empty());
}

bool SharedImageFactory::CreateSharedImage(const Mailbox& mailbox,
                                           viz::ResourceFormat format,
                                           const gfx::Size& size,
                                           const gfx::ColorSpace& color_space,
                                           uint32_t usage) {
  std::unique_ptr<SharedImageBacking> backing;
  bool using_wrapped_sk_image = wrapped_sk_image_factory_ &&
                                (usage & SHARED_IMAGE_USAGE_OOP_RASTERIZATION);
  if (using_wrapped_sk_image) {
    backing = wrapped_sk_image_factory_->CreateSharedImage(
        mailbox, format, size, color_space, usage);
  } else {
    backing = backing_factory_->CreateSharedImage(mailbox, format, size,
                                                  color_space, usage);
  }

  return RegisterBacking(std::move(backing), !using_wrapped_sk_image);
}

bool SharedImageFactory::CreateSharedImage(const Mailbox& mailbox,
                                           int client_id,
                                           gfx::GpuMemoryBufferHandle handle,
                                           gfx::BufferFormat format,
                                           SurfaceHandle surface_handle,
                                           const gfx::Size& size,
                                           const gfx::ColorSpace& color_space,
                                           uint32_t usage) {
  // TODO(piman): depending on handle.type, choose platform-specific backing
  // factory, e.g. SharedImageBackingFactoryAHardwareBuffer.
  std::unique_ptr<SharedImageBacking> backing =
      backing_factory_->CreateSharedImage(mailbox, client_id, std::move(handle),
                                          format, surface_handle, size,
                                          color_space, usage);
  return RegisterBacking(std::move(backing), true);
}

bool SharedImageFactory::UpdateSharedImage(const Mailbox& mailbox) {
  auto it = shared_images_.find(mailbox);
  if (it == shared_images_.end()) {
    LOG(ERROR) << "UpdateSharedImage: Could not find shared image mailbox";
    return false;
  }
  (*it)->Update();
  return true;
}

bool SharedImageFactory::DestroySharedImage(const Mailbox& mailbox) {
  auto it = shared_images_.find(mailbox);
  if (it == shared_images_.end()) {
    LOG(ERROR) << "DestroySharedImage: Could not find shared image mailbox";
    return false;
  }
  shared_images_.erase(it);
  return true;
}

void SharedImageFactory::DestroyAllSharedImages(bool have_context) {
  if (!have_context) {
    for (auto& shared_image : shared_images_)
      shared_image->OnContextLost();
  }
  shared_images_.clear();
}

// TODO(ericrk): Move this entirely to SharedImageManager.
bool SharedImageFactory::OnMemoryDump(
    const base::trace_event::MemoryDumpArgs& args,
    base::trace_event::ProcessMemoryDump* pmd,
    int client_id,
    uint64_t client_tracing_id) {
  for (const auto& shared_image : shared_images_) {
    shared_image_manager_->OnMemoryDump(shared_image->mailbox(), pmd, client_id,
                                        client_tracing_id);
  }

  return true;
}

bool SharedImageFactory::RegisterBacking(
    std::unique_ptr<SharedImageBacking> backing,
    bool legacy_mailbox) {
  if (!backing) {
    LOG(ERROR) << "CreateSharedImage: could not create backing.";
    return false;
  }

  Mailbox mailbox = backing->mailbox();
  if (shared_image_manager_->IsSharedImage(mailbox)) {
    LOG(ERROR) << "CreateSharedImage: mailbox is already associated with a "
                  "SharedImage";
    backing->Destroy();
    return false;
  }

  std::unique_ptr<SharedImageRepresentationFactoryRef> shared_image =
      shared_image_manager_->Register(std::move(backing),
                                      memory_tracker_.get());

  // TODO(ericrk): Remove this once no legacy cases remain.
  if (legacy_mailbox && !shared_image->ProduceLegacyMailbox(mailbox_manager_)) {
    LOG(ERROR) << "CreateSharedImage: could not convert shared_image to legacy "
                  "mailbox.";
    return false;
  }

  shared_images_.emplace(std::move(shared_image));
  return true;
}

SharedImageRepresentationFactory::SharedImageRepresentationFactory(
    SharedImageManager* manager,
    MemoryTracker* tracker)
    : manager_(manager),
      tracker_(std::make_unique<MemoryTypeTracker>(tracker)) {}

SharedImageRepresentationFactory::~SharedImageRepresentationFactory() {
  DCHECK_EQ(0u, tracker_->GetMemRepresented());
}

std::unique_ptr<SharedImageRepresentationGLTexture>
SharedImageRepresentationFactory::ProduceGLTexture(const Mailbox& mailbox) {
  return manager_->ProduceGLTexture(mailbox, tracker_.get());
}

std::unique_ptr<SharedImageRepresentationGLTexturePassthrough>
SharedImageRepresentationFactory::ProduceGLTexturePassthrough(
    const Mailbox& mailbox) {
  return manager_->ProduceGLTexturePassthrough(mailbox, tracker_.get());
}

std::unique_ptr<SharedImageRepresentationSkia>
SharedImageRepresentationFactory::ProduceSkia(const Mailbox& mailbox) {
  return manager_->ProduceSkia(mailbox, tracker_.get());
}

}  // namespace gpu