Blacklist bad GPU drivers: currenly we disable all gpu related features if th...

chrome/common/gpu_feature_flags.h

Index: chrome/common/gpu_feature_flags.h
===================================================================
--- chrome/common/gpu_feature_flags.h	(revision 0)
+++ chrome/common/gpu_feature_flags.h	(revision 0)
@@ -0,0 +1,54 @@
+// Copyright (c) 2010 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.
+
+#ifndef CHROME_COMMON_GPU_FEATURE_FLAGS_H__
+#define CHROME_COMMON_GPU_FEATURE_FLAGS_H__
+#pragma once
+
+// Provides flags indicating which gpu features are blacklisted for the system
+// on which chrome is currently running.
+
+#include <string>
+
+#include "base/basictypes.h"
+
+class GpuFeatureFlags {
+ public:
+  enum GpuFeatureType {
+    kGpuFeatureAccelerated2dCanvas = 1,

[vangelis, 2010/12/10 18:17:24]

Since you're expecting to be able to do binary operations with these, it might
be better to define their values as:

1 << 0
1 << 1
1 << 2

etc.  to make sure they stay as powers of two.

+    kGpuFeatureAcceleratedCompositing = 2,
+    kGpuFeatureWebgl = 4,
+    kGpuFeatureUnknown = 0
+  };
+
+  // All flags initialized to false, i.e., no feature is blacklisted.
+  GpuFeatureFlags();
+
+  // flags are OR combination of GpuFeatureType.
+  void set_flags(uint32 flags);
+
+  uint32 flags() const;
+
+  // Resets each flag by OR with the corresponding flag in "other".
+  void Combine(const GpuFeatureFlags& other);
+
+  // Maps string to GpuFeatureType; returns kGpuFeatureUnknown if none of the
+  // following is input (case-sensitive):
+  //   "accelerated_2d_canvas"
+  //   "accelerated_compositing"
+  //   "webgl"
+  static GpuFeatureType StringToGpuFeatureType(
+      const std::string& feature_string);
+
+ private:
+  static const char kGpuFeatureNameAccelerated2dCanvas[];
+  static const char kGpuFeatureNameAcceleratedCompositing[];
+  static const char kGpuFeatureNameWebgl[];
+
+  // If a bit is set to 1, corresponding feature is blacklisted.
+  uint32 flags_;
+};
+
+#endif  // CHROME_COMMON_GPU_FEATURE_FLAGS_H__
+