gpu/command_buffer/common/constants.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
   6 #define GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
   7
   8 #include "gpu/command_buffer/common/types.h"
   9
  10 namespace gpu {
  11
  12 typedef int32 CommandBufferOffset;
  13 const CommandBufferOffset kInvalidCommandBufferOffset = -1;
  14
  15 // This enum must stay in sync with NPDeviceContext3DError.
  16 namespace error {
  17   enum Error {
  18     kNoError,
  19     kInvalidSize,
  20     kOutOfBounds,
  21     kUnknownCommand,
  22     kInvalidArguments,
  23     kLostContext,
  24     kGenericError,
  25     kDeferCommandUntilLater
  26   };
  27
  28   // Return true if the given error code is an actual error.
  29   inline bool IsError(Error error) {
  30     return error != kNoError && error != kDeferCommandUntilLater;
  31   }
  32
  33   // Provides finer grained information about why the context was lost.
  34   enum ContextLostReason {
  35     // This context definitely provoked the loss of context.
  36     kGuilty,
  37
  38     // This context definitely did not provoke the loss of context.
  39     kInnocent,
  40
  41     // It is unknown whether this context provoked the loss of context.
  42     kUnknown
  43   };
  44 }
  45
  46 // Invalid shared memory Id, returned by RegisterSharedMemory in case of
  47 // failure.
  48 const int32 kInvalidSharedMemoryId = -1;
  49
  50 // Common Command Buffer shared memory transfer buffer ID.
  51 const int32 kCommandBufferSharedMemoryId = 4;
  52
  53 // The size to set for the program cache.
  54 const size_t kDefaultMaxProgramCacheMemoryBytes = 6 * 1024 * 1024;
  55
  56 }  // namespace gpu
  57
  58 #endif  // GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_