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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
#define GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
#include <stddef.h>
#include <stdint.h>
#include "build/build_config.h"
namespace gpu {
typedef int32_t CommandBufferOffset;
const CommandBufferOffset kInvalidCommandBufferOffset = -1;
namespace error {
enum Error {
kNoError,
kInvalidSize,
kOutOfBounds,
kUnknownCommand,
kInvalidArguments,
kLostContext,
kGenericError,
kDeferCommandUntilLater,
kDeferLaterCommands,
kErrorLast = kDeferLaterCommands,
};
// Return true if the given error code is an actual error.
inline bool IsError(Error error) {
return error != kNoError && error != kDeferCommandUntilLater &&
error != kDeferLaterCommands;
}
// Provides finer grained information about why the context was lost.
enum ContextLostReason {
// This context definitely provoked the loss of context.
kGuilty,
// This context definitely did not provoke the loss of context.
kInnocent,
// It is unknown whether this context provoked the loss of context.
kUnknown,
// GL_OUT_OF_MEMORY caused this context to be lost.
kOutOfMemory,
// A failure to make the context current caused it to be lost.
kMakeCurrentFailed,
// The GPU channel was lost. This error is set client-side.
kGpuChannelLost,
// The GPU process sent an invalid message/reply. This error is set
// client-side.
kInvalidGpuMessage,
kContextLostReasonLast = kInvalidGpuMessage
};
}
// Invalid shared memory Id, returned by RegisterSharedMemory in case of
// failure.
const int32_t kInvalidSharedMemoryId = -1;
// Common Command Buffer shared memory transfer buffer ID.
const int32_t kCommandBufferSharedMemoryId = 4;
// Namespace used to separate various command buffer types.
enum CommandBufferNamespace : int8_t {
INVALID = -1,
GPU_IO,
IN_PROCESS,
VIZ_SKIA_OUTPUT_SURFACE,
VIZ_SKIA_OUTPUT_SURFACE_NON_DDL,
NUM_COMMAND_BUFFER_NAMESPACES
};
enum class TransferBufferAllocationOption : int8_t {
kLoseContextOnOOM,
kReturnNullOnOOM,
};
#if BUILDFLAG(IS_WIN)
// Value used for DXGI keyed mutex AcquireSync and ReleaseSync. Exposed here so
// that external clients such as media and video capture can use the same key as
// gpu which is essential for correct operation of the keyed mutex.
constexpr uint64_t kDXGIKeyedMutexAcquireKey = 0;
#endif // BUILDFLAG(IS_WIN)
} // namespace gpu
#endif // GPU_COMMAND_BUFFER_COMMON_CONSTANTS_H_
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