1 files changed, 289 insertions, 0 deletions
diff --git a/gfx/config/gfxConfig.cpp b/gfx/config/gfxConfig.cpp
new file mode 100644
index 000000000..56a96d2b2
--- /dev/null
+++ b/gfx/config/gfxConfig.cpp
@@ -0,0 +1,289 @@
+/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim: set sts=2 ts=8 sw=2 tw=99 et: */
+/* 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 "gfxConfig.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/gfx/GraphicsMessages.h"
+#include "plstr.h"
+
+namespace mozilla {
+namespace gfx {
+
+static UniquePtr<gfxConfig> sConfig;
+
+/* static */ FeatureState&
+gfxConfig::GetFeature(Feature aFeature)
+{
+  return sConfig->GetState(aFeature);
+}
+
+/* static */ bool
+gfxConfig::IsEnabled(Feature aFeature)
+{
+  const FeatureState& state = sConfig->GetState(aFeature);
+  return state.IsEnabled();
+}
+
+/* static */ bool
+gfxConfig::IsDisabledByDefault(Feature aFeature)
+{
+  const FeatureState& state = sConfig->GetState(aFeature);
+  return state.DisabledByDefault();
+}
+
+/* static */ bool
+gfxConfig::IsForcedOnByUser(Feature aFeature)
+{
+  const FeatureState& state = sConfig->GetState(aFeature);
+  return state.IsForcedOnByUser();
+}
+
+/* static */ FeatureStatus
+gfxConfig::GetValue(Feature aFeature)
+{
+  const FeatureState& state = sConfig->GetState(aFeature);
+  return state.GetValue();
+}
+
+/* static */ bool
+gfxConfig::SetDefault(Feature aFeature,
+                      bool aEnable,
+                      FeatureStatus aDisableStatus,
+                      const char* aDisableMessage)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  return state.SetDefault(aEnable, aDisableStatus, aDisableMessage);
+}
+
+/* static */ void
+gfxConfig::DisableByDefault(Feature aFeature,
+                            FeatureStatus aDisableStatus,
+                            const char* aDisableMessage,
+                            const nsACString& aFailureId)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.DisableByDefault(aDisableStatus, aDisableMessage, aFailureId);
+}
+
+/* static */ void
+gfxConfig::EnableByDefault(Feature aFeature)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.EnableByDefault();
+}
+
+/* static */ void
+gfxConfig::SetDefaultFromPref(Feature aFeature,
+                              const char* aPrefName,
+                              bool aIsEnablePref,
+                              bool aDefaultValue)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  return state.SetDefaultFromPref(aPrefName, aIsEnablePref, aDefaultValue);
+}
+
+/* static */ bool
+gfxConfig::InitOrUpdate(Feature aFeature,
+                        bool aEnable,
+                        FeatureStatus aDisableStatus,
+                        const char* aDisableMessage)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  return state.InitOrUpdate(aEnable, aDisableStatus, aDisableMessage);
+}
+
+/* static */ void
+gfxConfig::SetFailed(Feature aFeature, FeatureStatus aStatus, const char* aMessage,
+                     const nsACString& aFailureId)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.SetFailed(aStatus, aMessage, aFailureId);
+}
+
+/* static */ void
+gfxConfig::Disable(Feature aFeature, FeatureStatus aStatus, const char* aMessage,
+                   const nsACString& aFailureId)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.Disable(aStatus, aMessage, aFailureId);
+}
+
+/* static */ void
+gfxConfig::UserEnable(Feature aFeature, const char* aMessage)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.UserEnable(aMessage);
+}
+
+/* static */ void
+gfxConfig::UserForceEnable(Feature aFeature, const char* aMessage)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.UserForceEnable(aMessage);
+}
+
+/* static */ void
+gfxConfig::UserDisable(Feature aFeature, const char* aMessage, const nsACString& aFailureId)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  state.UserDisable(aMessage, aFailureId);
+}
+
+/* static */ void
+gfxConfig::Reenable(Feature aFeature, Fallback aFallback)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+  MOZ_ASSERT(IsFeatureStatusFailure(state.GetValue()));
+
+  const char* message = state.GetRuntimeMessage();
+  EnableFallback(aFallback, message);
+  state.SetRuntime(FeatureStatus::Available, nullptr);
+}
+
+/* static */ void
+gfxConfig::Inherit(Feature aFeature, FeatureStatus aStatus)
+{
+  FeatureState& state = sConfig->GetState(aFeature);
+
+  state.Reset();
+
+  switch (aStatus) {
+  case FeatureStatus::Unused:
+    break;
+  case FeatureStatus::Available:
+    gfxConfig::EnableByDefault(aFeature);
+    break;
+  case FeatureStatus::ForceEnabled:
+    gfxConfig::EnableByDefault(aFeature);
+    gfxConfig::UserForceEnable(aFeature, "Inherited from parent process");
+    break;
+  default:
+    gfxConfig::SetDefault(
+      aFeature,
+      false,
+      aStatus,
+      "Disabled in parent process");
+    break;
+  }
+}
+
+/* static */ bool
+gfxConfig::UseFallback(Fallback aFallback)
+{
+  return sConfig->UseFallbackImpl(aFallback);
+}
+
+/* static */ void
+gfxConfig::EnableFallback(Fallback aFallback, const char* aMessage)
+{
+  // Ignore aMessage for now.
+  sConfig->EnableFallbackImpl(aFallback, aMessage);
+}
+
+bool
+gfxConfig::UseFallbackImpl(Fallback aFallback) const
+{
+  return !!(mFallbackBits & (uint64_t(1) << uint64_t(aFallback)));
+}
+
+void
+gfxConfig::EnableFallbackImpl(Fallback aFallback, const char* aMessage)
+{
+  if (!UseFallbackImpl(aFallback)) {
+    MOZ_ASSERT(mNumFallbackLogEntries < kNumFallbacks);
+
+    FallbackLogEntry& entry = mFallbackLog[mNumFallbackLogEntries];
+    mNumFallbackLogEntries++;
+
+    entry.mFallback = aFallback;
+    PL_strncpyz(entry.mMessage, aMessage, sizeof(entry.mMessage));
+  }
+  mFallbackBits |= (uint64_t(1) << uint64_t(aFallback));
+}
+
+struct FeatureInfo {
+  const char* name;
+  const char* description;
+};
+static const FeatureInfo sFeatureInfo[] = {
+#define FOR_EACH_FEATURE(name, type, desc) {#name, desc},
+  GFX_FEATURE_MAP(FOR_EACH_FEATURE)
+#undef FOR_EACH_FEATURE
+  {nullptr, nullptr}
+};
+
+/* static */ void
+gfxConfig::ForEachFeature(const FeatureIterCallback& aCallback)
+{
+  for (size_t i = 0; i < kNumFeatures; i++) {
+    FeatureState& state = GetFeature(static_cast<Feature>(i));
+    if (!state.IsInitialized()) {
+      continue;
+    }
+
+    aCallback(sFeatureInfo[i].name,
+              sFeatureInfo[i].description,
+              state);
+  }
+}
+
+static const char* sFallbackNames[] = {
+#define FOR_EACH_FALLBACK(name) #name,
+  GFX_FALLBACK_MAP(FOR_EACH_FALLBACK)
+#undef FOR_EACH_FALLBACK
+  nullptr
+};
+
+/* static  */ void
+gfxConfig::ForEachFallback(const FallbackIterCallback& aCallback)
+{
+  sConfig->ForEachFallbackImpl(aCallback);
+}
+
+void
+gfxConfig::ForEachFallbackImpl(const FallbackIterCallback& aCallback)
+{
+  for (size_t i = 0; i < mNumFallbackLogEntries; i++) {
+    const FallbackLogEntry& entry = mFallbackLog[i];
+    aCallback(sFallbackNames[size_t(entry.mFallback)], entry.mMessage);
+  }
+}
+
+/* static */ const nsCString&
+gfxConfig::GetFailureId(Feature aFeature)
+{
+  const FeatureState& state = sConfig->GetState(aFeature);
+  return state.GetFailureId();
+}
+
+/* static */ void
+gfxConfig::ImportChange(Feature aFeature, const FeatureChange& aChange)
+{
+  if (aChange.type() == FeatureChange::Tnull_t) {
+    return;
+  }
+
+  const FeatureFailure& failure = aChange.get_FeatureFailure();
+  gfxConfig::SetFailed(
+    aFeature,
+    failure.status(),
+    failure.message().get(),
+    failure.failureId());
+}
+
+/* static */ void
+gfxConfig::Init()
+{
+  sConfig = mozilla::MakeUnique<gfxConfig>();
+}
+
+/* static */ void
+gfxConfig::Shutdown()
+{
+  sConfig = nullptr;
+}
+
+} // namespace gfx
+} // namespace mozilla