// Copyright (c) 2006-2008 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 "o3d/gpu_plugin/gpu_processor.h"

namespace o3d {
namespace gpu_plugin {

GPUProcessor::~GPUProcessor() {
}

namespace {
void InvokeProcessCommands(void* data) {
  static_cast<GPUProcessor*>(data)->ProcessCommands();
}
}  // namespace anonymous

void GPUProcessor::ProcessCommands() {
  if (command_buffer_->GetErrorStatus())
    return;

  parser_->set_put(command_buffer_->GetPutOffset());

  int commands_processed = 0;
  while (commands_processed < commands_per_update_ && !parser_->IsEmpty()) {
    command_buffer::parse_error::ParseError parse_error =
        parser_->ProcessCommand();
    switch (parse_error) {
      case command_buffer::parse_error::kParseUnknownCommand:
      case command_buffer::parse_error::kParseInvalidArguments:
        command_buffer_->SetParseError(parse_error);
        break;

      case command_buffer::parse_error::kParseInvalidSize:
      case command_buffer::parse_error::kParseOutOfBounds:
        command_buffer_->SetParseError(parse_error);
        command_buffer_->RaiseErrorStatus();
        return;
    }

    ++commands_processed;
  }

  command_buffer_->SetGetOffset(static_cast<int32>(parser_->get()));

  if (!parser_->IsEmpty()) {
    NPBrowser::get()->PluginThreadAsyncCall(npp_, InvokeProcessCommands, this);
  }
}

void *GPUProcessor::GetSharedMemoryAddress(int32 shm_id) {
  NPObjectPointer<NPObject> shared_memory =
      command_buffer_->GetRegisteredObject(shm_id);

  size_t size;
  return NPBrowser::get()->MapMemory(npp_, shared_memory.Get(), &size);
}

// TODO(apatrick): Consolidate this with the above and return both the address
// and size.
size_t GPUProcessor::GetSharedMemorySize(int32 shm_id) {
  NPObjectPointer<NPObject> shared_memory =
      command_buffer_->GetRegisteredObject(shm_id);

  size_t size;
  NPBrowser::get()->MapMemory(npp_, shared_memory.Get(), &size);

  return size;
}

void GPUProcessor::set_token(int32 token) {
  command_buffer_->SetToken(token);
}

}  // namespace gpu_plugin
}  // namespace o3d