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      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_
     59