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 <stddef.h>
   9 #include <stdint.h>
  10
  11 namespace gpu {
  12
  13 typedef int32_t CommandBufferOffset;
  14 const CommandBufferOffset kInvalidCommandBufferOffset = -1;
  15
  16 // This enum must stay in sync with NPDeviceContext3DError.
  17 namespace error {
  18   enum Error {
  19     kNoError,
  20     kInvalidSize,
  21     kOutOfBounds,
  22     kUnknownCommand,
  23     kInvalidArguments,
  24     kLostContext,
  25     kGenericError,
  26     kDeferCommandUntilLater
  27   };
  28
  29   // Return true if the given error code is an actual error.
  30   inline bool IsError(Error error) {
  31     return error != kNoError && error != kDeferCommandUntilLater;
  32   }
  33
  34   // Provides finer grained information about why the context was lost.
  35   enum ContextLostReason {
  36     // This context definitely provoked the loss of context.
  37     kGuilty,
  38
  39     // This context definitely did not provoke the loss of context.
  40     kInnocent,
  41
  42     // It is unknown whether this context provoked the loss of context.
  43     kUnknown,
  44     kContextLostReasonLast = kUnknown
  45   };
  46 }
  47
  48 // Invalid shared memory Id, returned by RegisterSharedMemory in case of
  49 // failure.
  50 const int32_t kInvalidSharedMemoryId = -1;
  51
  52 // Common Command Buffer shared memory transfer buffer ID.
  53 const int32_t kCommandBufferSharedMemoryId = 4;
  54
  55 // The size to set for the program cache.
  56 const size_t kDefaultMaxProgramCacheMemoryBytes = 6 * 1024 * 1024;
  57
  58 }  // namespace gpu
  59
  60 #endif  // GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_