// Copyright (c) 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 "gpu/config/gpu_util.h"

#include <memory>
#include <vector>

#include "base/command_line.h"
#include "base/debug/crash_logging.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/sys_info.h"
#include "gpu/config/gpu_blacklist.h"
#include "gpu/config/gpu_crash_keys.h"
#include "gpu/config/gpu_driver_bug_list.h"
#include "gpu/config/gpu_driver_bug_workaround_type.h"
#include "gpu/config/gpu_feature_type.h"
#include "gpu/config/gpu_finch_features.h"
#include "gpu/config/gpu_info_collector.h"
#include "gpu/config/gpu_switches.h"
#include "ui/gl/gl_switches.h"

namespace gpu {

namespace {

// |str| is in the format of "0x040a;0x10de;...;hex32_N".
void StringToIds(const std::string& str, std::vector<uint32_t>* list) {
  DCHECK(list);
  for (const base::StringPiece& piece : base::SplitStringPiece(
           str, ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
    uint32_t id = 0;
    bool succeed = base::HexStringToUInt(piece, &id);
    DCHECK(succeed);
    list->push_back(id);
  }
}

bool UseSwiftShader(const base::CommandLine& command_line) {
  if (!command_line.HasSwitch(switches::kUseGL))
    return false;
  std::string use_gl = command_line.GetSwitchValueASCII(switches::kUseGL);
  return (use_gl == gl::kGLImplementationSwiftShaderForWebGLName ||
          use_gl == gl::kGLImplementationSwiftShaderName);
}

GpuFeatureStatus GetGpuRasterizationFeatureStatus(
    const std::set<int>& blacklisted_features,
    const base::CommandLine& command_line) {
  if (command_line.HasSwitch(switches::kDisableGpuRasterization))
    return kGpuFeatureStatusDisabled;
  else if (command_line.HasSwitch(switches::kEnableGpuRasterization))
    return kGpuFeatureStatusEnabled;

  if (blacklisted_features.count(GPU_FEATURE_TYPE_GPU_RASTERIZATION))
    return kGpuFeatureStatusBlacklisted;

#if defined(OS_ANDROID)
  // GPU Raster is always enabled on >512MB Android devices. On 512MB devices,
  // it is controlled by a Finch experiment.
  if (base::SysInfo::AmountOfPhysicalMemoryMB() > 512)
    return kGpuFeatureStatusEnabled;
#endif  // defined(OS_ANDROID)

  // Gpu Rasterization on platforms that are not fully enabled is controlled by
  // a finch experiment.
  if (!base::FeatureList::IsEnabled(features::kDefaultEnableGpuRasterization))
    return kGpuFeatureStatusDisabled;

  return kGpuFeatureStatusEnabled;
}

GpuFeatureStatus GetWebGLFeatureStatus(
    const std::set<int>& blacklisted_features,
    const base::CommandLine& command_line) {
  if (UseSwiftShader(command_line))
    return kGpuFeatureStatusSoftware;
  if (blacklisted_features.count(GPU_FEATURE_TYPE_ACCELERATED_WEBGL))
    return kGpuFeatureStatusBlacklisted;
  return kGpuFeatureStatusEnabled;
}

GpuFeatureStatus GetWebGL2FeatureStatus(
    const std::set<int>& blacklisted_features,
    const base::CommandLine& command_line) {
  if (UseSwiftShader(command_line))
    return kGpuFeatureStatusSoftware;
  if (blacklisted_features.count(GPU_FEATURE_TYPE_ACCELERATED_WEBGL2))
    return kGpuFeatureStatusBlacklisted;
  return kGpuFeatureStatusEnabled;
}

void AppendWorkaroundsToCommandLine(const GpuFeatureInfo& gpu_feature_info,
                                    base::CommandLine* command_line) {
  if (gpu_feature_info.IsWorkaroundEnabled(DISABLE_D3D11)) {
    command_line->AppendSwitch(switches::kDisableD3D11);
  }
  if (gpu_feature_info.IsWorkaroundEnabled(DISABLE_ES3_GL_CONTEXT)) {
    command_line->AppendSwitch(switches::kDisableES3GLContext);
  }
  if (gpu_feature_info.IsWorkaroundEnabled(DISABLE_DIRECT_COMPOSITION)) {
    command_line->AppendSwitch(switches::kDisableDirectComposition);
  }
}

// Adjust gpu feature status based on enabled gpu driver bug workarounds.
void AdjustGpuFeatureStatusToWorkarounds(GpuFeatureInfo* gpu_feature_info) {
  if (gpu_feature_info->IsWorkaroundEnabled(DISABLE_D3D11) ||
      gpu_feature_info->IsWorkaroundEnabled(DISABLE_ES3_GL_CONTEXT)) {
    gpu_feature_info->status_values[GPU_FEATURE_TYPE_ACCELERATED_WEBGL2] =
        kGpuFeatureStatusBlacklisted;
  }
}

}  // namespace anonymous

void ParseSecondaryGpuDevicesFromCommandLine(
    const base::CommandLine& command_line,
    GPUInfo* gpu_info) {
  DCHECK(gpu_info);

  const char* secondary_vendor_switch_key = switches::kGpuSecondaryVendorIDs;
  const char* secondary_device_switch_key = switches::kGpuSecondaryDeviceIDs;

  if (command_line.HasSwitch(switches::kGpuTestingSecondaryVendorIDs) &&
      command_line.HasSwitch(switches::kGpuTestingSecondaryDeviceIDs)) {
    secondary_vendor_switch_key = switches::kGpuTestingSecondaryVendorIDs;
    secondary_device_switch_key = switches::kGpuTestingSecondaryDeviceIDs;
  }

  if (!command_line.HasSwitch(secondary_vendor_switch_key) ||
      !command_line.HasSwitch(secondary_device_switch_key)) {
    return;
  }

  std::vector<uint32_t> vendor_ids;
  std::vector<uint32_t> device_ids;
  StringToIds(command_line.GetSwitchValueASCII(secondary_vendor_switch_key),
              &vendor_ids);
  StringToIds(command_line.GetSwitchValueASCII(secondary_device_switch_key),
              &device_ids);

  DCHECK(vendor_ids.size() == device_ids.size());
  gpu_info->secondary_gpus.clear();
  for (size_t i = 0; i < vendor_ids.size() && i < device_ids.size(); ++i) {
    gpu::GPUInfo::GPUDevice secondary_device;
    secondary_device.active = false;
    secondary_device.vendor_id = vendor_ids[i];
    secondary_device.device_id = device_ids[i];
    gpu_info->secondary_gpus.push_back(secondary_device);
  }
}

void GetGpuInfoFromCommandLine(const base::CommandLine& command_line,
                               GPUInfo* gpu_info) {
  DCHECK(gpu_info);

  if (!command_line.HasSwitch(switches::kGpuVendorID) ||
      !command_line.HasSwitch(switches::kGpuDeviceID) ||
      !command_line.HasSwitch(switches::kGpuDriverVersion))
    return;
  bool success = base::HexStringToUInt(
      command_line.GetSwitchValueASCII(switches::kGpuVendorID),
      &gpu_info->gpu.vendor_id);
  DCHECK(success);
  success = base::HexStringToUInt(
      command_line.GetSwitchValueASCII(switches::kGpuDeviceID),
      &gpu_info->gpu.device_id);
  DCHECK(success);
  gpu_info->driver_vendor =
      command_line.GetSwitchValueASCII(switches::kGpuDriverVendor);
  gpu_info->driver_version =
      command_line.GetSwitchValueASCII(switches::kGpuDriverVersion);
  gpu_info->driver_date =
      command_line.GetSwitchValueASCII(switches::kGpuDriverDate);
  gpu::ParseSecondaryGpuDevicesFromCommandLine(command_line, gpu_info);

  // Set active gpu device.
  if (command_line.HasSwitch(switches::kGpuActiveVendorID) &&
      command_line.HasSwitch(switches::kGpuActiveDeviceID)) {
    uint32_t active_vendor_id = 0;
    uint32_t active_device_id = 0;
    success = base::HexStringToUInt(
        command_line.GetSwitchValueASCII(switches::kGpuActiveVendorID),
        &active_vendor_id);
    DCHECK(success);
    success = base::HexStringToUInt(
        command_line.GetSwitchValueASCII(switches::kGpuActiveDeviceID),
        &active_device_id);
    DCHECK(success);
    if (gpu_info->gpu.vendor_id == active_vendor_id &&
        gpu_info->gpu.device_id == active_device_id) {
      gpu_info->gpu.active = true;
    } else {
      for (size_t i = 0; i < gpu_info->secondary_gpus.size(); ++i) {
        if (gpu_info->secondary_gpus[i].vendor_id == active_vendor_id &&
            gpu_info->secondary_gpus[i].device_id == active_device_id) {
          gpu_info->secondary_gpus[i].active = true;
          break;
        }
      }
    }
  }

  if (command_line.HasSwitch(switches::kAMDSwitchable)) {
    gpu_info->amd_switchable = true;
  }
}

GpuFeatureInfo ComputeGpuFeatureInfo(const GPUInfo& gpu_info,
                                     base::CommandLine* command_line) {
  GpuFeatureInfo gpu_feature_info;
  std::set<int> blacklisted_features;
  if (!command_line->HasSwitch(switches::kIgnoreGpuBlacklist)) {
    std::unique_ptr<GpuBlacklist> list(GpuBlacklist::Create());
    blacklisted_features =
        list->MakeDecision(GpuControlList::kOsAny, std::string(), gpu_info);
  }

  // Currently only computed and used for a few features.
  gpu_feature_info.status_values[GPU_FEATURE_TYPE_GPU_RASTERIZATION] =
      GetGpuRasterizationFeatureStatus(blacklisted_features, *command_line);
  gpu_feature_info.status_values[GPU_FEATURE_TYPE_ACCELERATED_WEBGL] =
      GetWebGLFeatureStatus(blacklisted_features, *command_line);
  gpu_feature_info.status_values[GPU_FEATURE_TYPE_ACCELERATED_WEBGL2] =
      GetWebGL2FeatureStatus(blacklisted_features, *command_line);

  std::set<base::StringPiece> all_disabled_extensions;
  std::string disabled_gl_extensions_value =
      command_line->GetSwitchValueASCII(switches::kDisableGLExtensions);
  if (!disabled_gl_extensions_value.empty()) {
    std::vector<base::StringPiece> command_line_disabled_extensions =
        base::SplitStringPiece(disabled_gl_extensions_value, ", ;",
                               base::KEEP_WHITESPACE,
                               base::SPLIT_WANT_NONEMPTY);
    all_disabled_extensions.insert(command_line_disabled_extensions.begin(),
                                   command_line_disabled_extensions.end());
  }

  std::set<int> enabled_driver_bug_workarounds;
  std::vector<std::string> driver_bug_disabled_extensions;
  if (!command_line->HasSwitch(switches::kDisableGpuDriverBugWorkarounds)) {
    std::unique_ptr<gpu::GpuDriverBugList> list(GpuDriverBugList::Create());
    enabled_driver_bug_workarounds =
        list->MakeDecision(GpuControlList::kOsAny, std::string(), gpu_info);
    gpu_feature_info.applied_gpu_driver_bug_list_entries =
        list->GetActiveEntries();

    driver_bug_disabled_extensions = list->GetDisabledExtensions();
    all_disabled_extensions.insert(driver_bug_disabled_extensions.begin(),
                                   driver_bug_disabled_extensions.end());
  }
  gpu::GpuDriverBugList::AppendWorkaroundsFromCommandLine(
      &enabled_driver_bug_workarounds, *command_line);

  gpu_feature_info.enabled_gpu_driver_bug_workarounds.insert(
      gpu_feature_info.enabled_gpu_driver_bug_workarounds.begin(),
      enabled_driver_bug_workarounds.begin(),
      enabled_driver_bug_workarounds.end());

  if (all_disabled_extensions.size()) {
    std::vector<base::StringPiece> v(all_disabled_extensions.begin(),
                                     all_disabled_extensions.end());
    gpu_feature_info.disabled_extensions = base::JoinString(v, " ");
  }

  AdjustGpuFeatureStatusToWorkarounds(&gpu_feature_info);

  // TODO(zmo): Find a better way to communicate these settings to bindings
  // initialization than commandline switches.
  AppendWorkaroundsToCommandLine(gpu_feature_info, command_line);

  return gpu_feature_info;
}

void SetKeysForCrashLogging(const GPUInfo& gpu_info) {
#if !defined(OS_ANDROID)
  base::debug::SetCrashKeyValue(
      crash_keys::kGPUVendorID,
      base::StringPrintf("0x%04x", gpu_info.gpu.vendor_id));
  base::debug::SetCrashKeyValue(
      crash_keys::kGPUDeviceID,
      base::StringPrintf("0x%04x", gpu_info.gpu.device_id));
#endif
  base::debug::SetCrashKeyValue(crash_keys::kGPUDriverVersion,
                                gpu_info.driver_version);
  base::debug::SetCrashKeyValue(crash_keys::kGPUPixelShaderVersion,
                                gpu_info.pixel_shader_version);
  base::debug::SetCrashKeyValue(crash_keys::kGPUVertexShaderVersion,
                                gpu_info.vertex_shader_version);
#if defined(OS_MACOSX)
  base::debug::SetCrashKeyValue(crash_keys::kGPUGLVersion, gpu_info.gl_version);
#elif defined(OS_POSIX)
  base::debug::SetCrashKeyValue(crash_keys::kGPUVendor, gpu_info.gl_vendor);
  base::debug::SetCrashKeyValue(crash_keys::kGPURenderer, gpu_info.gl_renderer);
#endif
}

}  // namespace gpu