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     kErrorLast = kDeferCommandUntilLater,
  28   };
  29
  30   // Return true if the given error code is an actual error.
  31   inline bool IsError(Error error) {
  32     return error != kNoError && error != kDeferCommandUntilLater;
  33   }
  34
  35   // Provides finer grained information about why the context was lost.
  36   enum ContextLostReason {
  37     // This context definitely provoked the loss of context.
  38     kGuilty,
  39
  40     // This context definitely did not provoke the loss of context.
  41     kInnocent,
  42
  43     // It is unknown whether this context provoked the loss of context.
  44     kUnknown,
  45
  46     // GL_OUT_OF_MEMORY caused this context to be lost.
  47     kOutOfMemory,
  48
  49     // A failure to make the context current caused it to be lost.
  50     kMakeCurrentFailed,
  51
  52     // The GPU channel was lost. This error is set client-side.
  53     kGpuChannelLost,
  54
  55     kContextLostReasonLast = kGpuChannelLost
  56   };
  57 }
  58
  59 // Invalid shared memory Id, returned by RegisterSharedMemory in case of
  60 // failure.
  61 const int32_t kInvalidSharedMemoryId = -1;
  62
  63 // Common Command Buffer shared memory transfer buffer ID.
  64 const int32_t kCommandBufferSharedMemoryId = 4;
  65
  66 // The size to set for the program cache.
  67 const size_t kDefaultMaxProgramCacheMemoryBytes = 6 * 1024 * 1024;
  68
  69 // Namespace used to separate various command buffer types.
  70 enum CommandBufferNamespace {
  71   INVALID = -1,
  72
  73   GPU_IO,
  74   IN_PROCESS,
  75   MOJO,
  76
  77   NUM_COMMAND_BUFFER_NAMESPACES
  78 };
  79
  80
  81 }  // namespace gpu
  82
  83 #endif  // GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_