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diff --git a/gfx/config/gfxFeature.h b/gfx/config/gfxFeature.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+#ifndef mozilla_gfx_config_gfxFeature_h
+#define mozilla_gfx_config_gfxFeature_h
+
+#include <functional>
+#include <stdint.h>
+#include "gfxTelemetry.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Maybe.h"
+#include "nsString.h"
+
+namespace mozilla {
+namespace gfx {
+
+#define GFX_FEATURE_MAP(_) \
+ /* Name, Type, Description */ \
+ _(HW_COMPOSITING, Feature, "Compositing") \
+ _(D3D11_COMPOSITING, Feature, "Direct3D11 Compositing") \
+ _(OPENGL_COMPOSITING, Feature, "OpenGL Compositing") \
+ _(DIRECT2D, Feature, "Direct2D") \
+ _(D3D11_HW_ANGLE, Feature, "Direct3D11 hardware ANGLE") \
+ _(DIRECT_DRAW, Feature, "DirectDraw") \
+ _(GPU_PROCESS, Feature, "GPU Process") \
+ _(WEBRENDER, Feature, "WebRender") \
+ _(WEBRENDER_COMPOSITOR, Feature, "WebRender native compositor") \
+ _(WEBRENDER_PARTIAL, Feature, "WebRender partial present") \
+ _(WEBRENDER_SHADER_CACHE, Feature, "WebRender shader disk cache") \
+ _(WEBRENDER_OPTIMIZED_SHADERS, Feature, "WebRender optimized shaders") \
+ _(WEBRENDER_ANGLE, Feature, "WebRender ANGLE") \
+ _(WEBRENDER_DCOMP_PRESENT, Feature, "WebRender DirectComposition") \
+ _(WEBRENDER_SCISSORED_CACHE_CLEARS, Feature, \
+ "WebRender scissored cache clears") \
+ _(OMTP, Feature, "Off Main Thread Painting") \
+ _(WEBGPU, Feature, "WebGPU") \
+ _(X11_EGL, Feature, "X11 EGL") \
+ _(DMABUF, Feature, "DMABUF") \
+ _(WINDOW_OCCLUSION, Feature, "WINDOW_OCCLUSION") \
+ _(HARDWARE_VIDEO_DECODING, Feature, "Hardware video decoding") \
+ _(VIDEO_OVERLAY, Feature, "video overlay") \
+ _(HW_DECODED_VIDEO_ZERO_COPY, Feature, "Hardware decoded video zero copy") \
+ _(VP8_HW_DECODE, Feature, "VP8 hardware decoding") \
+ _(VP9_HW_DECODE, Feature, "VP9 hardware decoding") \
+ _(DMABUF_SURFACE_EXPORT, Feature, "WebGL DMABuf surface export") \
+ _(REUSE_DECODER_DEVICE, Feature, "Reuse decoder device") \
+ _(BACKDROP_FILTER, Feature, "Backdrop filter") \
+ _(CANVAS_RENDERER_THREAD, Feature, "canvas renderer thread") \
+ _(ACCELERATED_CANVAS2D, Feature, "Accelerated Canvas2D") \
+ _(H264_HW_DECODE, Feature, "H.264 hardware decoding") \
+ _(AV1_HW_DECODE, Feature, "AV1 hardware decoding") \
+ /* Add new entries above this comment */
+
+enum class Feature : uint32_t {
+#define MAKE_ENUM(name, type, desc) name,
+ GFX_FEATURE_MAP(MAKE_ENUM)
+#undef MAKE_ENUM
+ NumValues
+};
+
+class FeatureState {
+ friend class gfxConfig;
+ friend class GfxConfigManager; // for testing
+
+ public:
+ FeatureState() { Reset(); }
+
+ bool IsEnabled() const;
+ FeatureStatus GetValue() const;
+
+ void EnableByDefault();
+ void DisableByDefault(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ bool SetDefault(bool aEnable, FeatureStatus aDisableStatus,
+ const char* aDisableMessage);
+ bool InitOrUpdate(bool aEnable, FeatureStatus aDisableStatus,
+ const char* aMessage);
+ void SetDefaultFromPref(const char* aPrefName, bool aIsEnablePref,
+ bool aDefaultValue, Maybe<bool> aUserValue);
+ void SetDefaultFromPref(const char* aPrefName, bool aIsEnablePref,
+ bool aDefaultValue);
+ void UserEnable(const char* aMessage);
+ void UserForceEnable(const char* aMessage);
+ void UserDisable(const char* aMessage, const nsACString& aFailureId);
+ void Disable(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ void ForceDisable(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId) {
+ SetFailed(aStatus, aMessage, aFailureId);
+ }
+ void SetFailed(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ bool MaybeSetFailed(bool aEnable, FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ bool MaybeSetFailed(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+
+ // aType is "base", "user", "env", or "runtime".
+ // aMessage may be null.
+ typedef std::function<void(const char* aType, FeatureStatus aStatus,
+ const char* aMessage, const nsCString& aFailureId)>
+ StatusIterCallback;
+ void ForEachStatusChange(const StatusIterCallback& aCallback) const;
+
+ const char* GetFailureMessage() const;
+ const nsCString& GetFailureId() const;
+ nsCString GetStatusAndFailureIdString() const;
+
+ bool DisabledByDefault() const;
+
+ // Clear all state.
+ void Reset();
+
+ private:
+ void SetUser(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ void SetEnvironment(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ void SetRuntime(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ bool IsForcedOnByUser() const;
+ const char* GetRuntimeMessage() const;
+ bool IsInitialized() const { return mDefault.IsInitialized(); }
+
+ void AssertInitialized() const { MOZ_ASSERT(IsInitialized()); }
+
+ private:
+ struct Instance {
+ char mMessage[64];
+ FeatureStatus mStatus;
+ nsCString mFailureId;
+
+ void Set(FeatureStatus aStatus);
+ void Set(FeatureStatus aStatus, const char* aMessage,
+ const nsACString& aFailureId);
+ bool IsInitialized() const { return mStatus != FeatureStatus::Unused; }
+ const char* MessageOrNull() const {
+ return mMessage[0] != '\0' ? mMessage : nullptr;
+ }
+ const char* Message() const {
+ MOZ_ASSERT(MessageOrNull());
+ return mMessage;
+ }
+ const nsCString& FailureId() const { return mFailureId; }
+ };
+
+ // The default state is the state we decide on startup, based on the operating
+ // system or a base preference.
+ //
+ // The user state factors in any changes to preferences that the user made.
+ //
+ // The environment state factors in any additional decisions made, such as
+ // availability or blocklisting.
+ //
+ // The runtime state factors in any problems discovered at runtime.
+ Instance mDefault;
+ Instance mUser;
+ Instance mEnvironment;
+ Instance mRuntime;
+};
+
+} // namespace gfx
+} // namespace mozilla
+
+#endif // mozilla_gfx_config_gfxFeature_h