/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

/* NOTE: this interface is completely undesigned, not stable and likely to change */
[scriptable, builtinclass, uuid(1accd618-4c80-4703-9d29-ecf257d397c8)]
interface nsIGfxInfo : nsISupports
{
  /*
   * These are win32-specific
   */
  readonly attribute boolean D2DEnabled;
  readonly attribute boolean DWriteEnabled;
  readonly attribute boolean usingGPUProcess;
  readonly attribute AString DWriteVersion;
  readonly attribute AString cleartypeParameters;

  /*
   * These are non-Android linux-specific
   */
  readonly attribute AString windowProtocol;

  /*
   * These are valid across all platforms.
   */
  readonly attribute AString ContentBackend;
  readonly attribute boolean WebRenderEnabled;
  readonly attribute boolean isHeadless;
  readonly attribute boolean UsesTiling;
  readonly attribute boolean ContentUsesTiling;
  readonly attribute boolean OffMainThreadPaintEnabled;
  readonly attribute long OffMainThreadPaintWorkerCount;
  readonly attribute unsigned long TargetFrameRate;

  // XXX: Switch to a list of devices, rather than explicitly numbering them.

  /**
   * The name of the display adapter.
   */
  readonly attribute AString adapterDescription;
  readonly attribute AString adapterDescription2;

  readonly attribute AString adapterDriver;
  readonly attribute AString adapterDriver2;

  /* These types are inspired by DXGI_ADAPTER_DESC */
  readonly attribute AString adapterVendorID;
  readonly attribute AString adapterVendorID2;

  readonly attribute AString adapterDeviceID;
  readonly attribute AString adapterDeviceID2;

  readonly attribute AString adapterSubsysID;
  readonly attribute AString adapterSubsysID2;

  /**
   * The amount of RAM in MB in the display adapter.
   */
  readonly attribute AString adapterRAM;
  readonly attribute AString adapterRAM2;

  readonly attribute AString adapterDriverVendor;
  readonly attribute AString adapterDriverVendor2;

  readonly attribute AString adapterDriverVersion;
  readonly attribute AString adapterDriverVersion2;

  readonly attribute AString adapterDriverDate;
  readonly attribute AString adapterDriverDate2;

  readonly attribute boolean isGPU2Active;

  /**
   * Returns an array of objects describing each monitor. Guaranteed properties
   * are "screenWidth" and "screenHeight". This is only implemented on Desktop.
   *
   * Windows additionally supplies "refreshRate" and "pseudoDisplay".
   *
   * OS X additionally supplies "scale".
   */
  [implicit_jscontext]
  jsval getMonitors();

  void getFailures(
               out unsigned long failureCount,
               [optional, array, size_is(failureCount)] out long indices,
               [retval, array, size_is(failureCount)] out string failures);

  [noscript, notxpcom] void logFailure(in ACString failure);
  /*
   * A set of constants for features that we can ask this GfxInfo object
   * about via GetFeatureStatus
   */
  /* Don't assign any value <= 0 */
  /* Whether Direct2D is supported for content rendering. */
  const long FEATURE_DIRECT2D = 1;
  /* Whether Direct3D 9 is supported for layers. */
  const long FEATURE_DIRECT3D_9_LAYERS = 2;
  /* Whether Direct3D 10.0 is supported for layers. */
  const long FEATURE_DIRECT3D_10_LAYERS = 3;
  /* Whether Direct3D 10.1 is supported for layers. */
  const long FEATURE_DIRECT3D_10_1_LAYERS = 4;
  /* Whether OpenGL is supported for layers */
  const long FEATURE_OPENGL_LAYERS = 5;
  /* Whether WebGL is supported via OpenGL. */
  const long FEATURE_WEBGL_OPENGL = 6;
  /* Whether WebGL is supported via ANGLE (D3D9 -- does not check for the presence of ANGLE libs). */
  const long FEATURE_WEBGL_ANGLE = 7;
  /* Whether WebGL antialiasing is supported. */
  const long FEATURE_WEBGL_MSAA = 8;
  /* Whether Stagefright is supported, starting in 17. */
  const long FEATURE_STAGEFRIGHT = 9;
  /* Whether Webrtc Hardware acceleration is supported, starting in 31. */
  const long FEATURE_WEBRTC_HW_ACCELERATION = 10;
  /* Whether Direct3D 11 is supported for layers, starting in 32. */
  const long FEATURE_DIRECT3D_11_LAYERS = 11;
  /* Whether hardware accelerated video decoding is supported, starting in 36. */
  const long FEATURE_HARDWARE_VIDEO_DECODING = 12;
  /* Whether Direct3D 11 is supported for ANGLE, starting in 38. */
  const long FEATURE_DIRECT3D_11_ANGLE = 13;
  /* Whether Webrtc Hardware acceleration is supported, starting in 42. */
  const long FEATURE_WEBRTC_HW_ACCELERATION_ENCODE = 14;
  /* Whether Webrtc Hardware acceleration is supported, starting in 42. */
  const long FEATURE_WEBRTC_HW_ACCELERATION_DECODE = 15;
  /* Whether Canvas acceleration is supported, starting in 45 */
  const long FEATURE_CANVAS2D_ACCELERATION = 16;
  /* Whether hardware VP8 decoding is supported, starting in 48; not for downloadable blocking. */
  const long FEATURE_VP8_HW_DECODE = 17;
  /* Whether hardware VP9 decoding is supported, starting in 48; not for downloadable blocking. */
  const long FEATURE_VP9_HW_DECODE = 18;
  /* Whether NV_dx_interop2 is supported, starting in 50; downloadable blocking in 58. */
  const long FEATURE_DX_INTEROP2 = 19;
  /* Whether the GPU process is supported, starting in 52; downloadable blocking in 58. */
  const long FEATURE_GPU_PROCESS = 20;
  /* Whether the WebGL2 is supported, starting in 54 */
  const long FEATURE_WEBGL2 = 21;
  /* Whether Advanced Layers is supported, starting in 56 */
  const long FEATURE_ADVANCED_LAYERS = 22;
  /* Whether D3D11 keyed mutex is supported, starting in 56 */
  const long FEATURE_D3D11_KEYED_MUTEX = 23;
  /* Whether WebRender is supported, starting in 62 */
  const long FEATURE_WEBRENDER = 24;
  /* Whether WebRender is supported, starting in 62 */
  const long FEATURE_DX_NV12 = 25;
  const long FEATURE_DX_P010 = 26;
  const long FEATURE_DX_P016 = 27;
  /* the maximum feature value. */
  const long FEATURE_MAX_VALUE = FEATURE_DX_P016;

  /*
   * A set of return values from GetFeatureStatus
   */

  /* The driver is safe to the best of our knowledge */
  const long FEATURE_STATUS_OK = 1;
  /* We don't know the status of the feature yet. The analysis probably hasn't finished yet. */
  const long FEATURE_STATUS_UNKNOWN = 2;
  /* This feature is blocked on this driver version. Updating driver will typically unblock it. */
  const long FEATURE_BLOCKED_DRIVER_VERSION = 3;
  /* This feature is blocked on this device, regardless of driver version.
   * Typically means we hit too many driver crashes without a good reason to hope for them to
   * get fixed soon. */
  const long FEATURE_BLOCKED_DEVICE = 4;
  /* This feature is available and can be used, but is not suggested (e.g. shouldn't be used by default */
  const long FEATURE_DISCOURAGED = 5;
  /* This feature is blocked on this OS version. */
  const long FEATURE_BLOCKED_OS_VERSION = 6;
  /* This feature is blocked because of mismatched driver versions. */
  const long FEATURE_BLOCKED_MISMATCHED_VERSION = 7;

  /**
   * Ask about a feature, and return the status of that feature.
   * If the feature is not ok then aFailureId will give a unique failure Id
   * otherwise it will be empty.
   */
  long getFeatureStatus(in long aFeature, [optional] out ACString aFailureId);

  /*
   * Ask about a feature, return the minimum driver version required for it if its status is
   * FEATURE_BLOCKED_DRIVER_VERSION, otherwise return an empty string.
   */
  AString getFeatureSuggestedDriverVersion(in long aFeature);

  // only useful on X11
  [noscript, notxpcom] void GetData();

  [implicit_jscontext]
  jsval getInfo();

  // Return an object describing all features that have been configured:
  //
  //   "features": [
  //     // For each feature:
  //     {
  //       "name": <string>,
  //       "description": <string>,
  //       "status": <string>,
  //       "log": [
  //          // One or more log entries, the first denotes the default value.
  //          {
  //            "type": <string>,    // "base", "user", "env", or "runtime"
  //            "status": <string>,
  //            "message": <string>  // Set unless type is "base" and status is "available".
  //          }
  //       ]
  //     }
  //   ]
  //   "fallbacks": [
  //     // For each workaround:
  //     {
  //       "name:" <string>,
  //       "description": <string>,
  //       "message": <string>
  //     ]
  //   }
  //
  // When a message is prefixed with a '#', it is a special status code. Status
  // codes are unique identifiers that can be searched in the codebase to find
  // which line of code caused the message. Some codes are standardized to
  // improve about:support messaging:
  //
  //   "[CONTEXT_]FEATURE_FAILURE_BUG_<number>"
  //     CONTEXT is optional and can currently only be "BLOCKLIST".
  //     <number> refers to a bug number in Bugzilla.
  //
  [implicit_jscontext]
  jsval getFeatureLog();

  // Returns an object containing information about graphics features. It is
  // intended to be directly included into the Telemetry environment.
  //
  //   "layers":
  //   {
  //     "compositor": "d3d9", "d3d11", "opengl", "basic", or "none"
  //                   // ("none" indicates no compositors have been created)
  //     // Feature is one of "d3d9", "d3d11", "opengl", "basic", or "d2d".
  //     "<feature>": {
  //       // Each backend can have one of the following statuses:
  //       //   "unused"      - This feature has not been requested.
  //       //   "unavailable" - OS version or restriction prevents use.
  //       //   "blocked"     - An internal condition (such as safe mode) prevents use.
  //       //   "blacklisted" - Blocked due to a blacklist restriction.
  //       //   "disabled"    - User explicitly disabled this default feature.
  //       //   "failed"      - Feature failed to initialize.
  //       //   "available"   - User has this feature available by default.
  //       "status": "<status>",
  //       "version": "<version>",
  //       "warp": true|false,           // D3D11 only.
  //       "textureSharing": true|false, // D3D11 only.
  //     }
  //   }
  [implicit_jscontext]
  jsval getFeatures();

  // Returns an array listing any active crash guards.
  //
  //   [
  //     {
  //       // Type is one of "d3d11layers", "d3d9video", "glcontext",
  //       // or "d3d11video".
  //       "type":        "<identifier>",
  //
  //       // Preference that must be deleted/reset to retrigger the guard.
  //       "prefName":    "<preference>",
  //     }
  //   ]
  [implicit_jscontext]
  jsval getActiveCrashGuards();

  // Forces the GPU process to start or shutdown. This is intended only for
  // xpcshell-tests.
  boolean controlGPUProcessForXPCShell(in boolean aEnable);
};

