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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_BUFFER_TYPES_H_
#define UI_GFX_BUFFER_TYPES_H_
namespace gfx {
// The format needs to be taken into account when mapping a buffer into the
// client's address space.
enum class BufferFormat {
ATC,
ATCIA,
DXT1,
DXT5,
ETC1,
R_8,
R_16,
RG_88,
BGR_565,
RGBA_4444,
RGBX_8888,
RGBA_8888,
BGRX_8888,
BGRA_8888,
RGBA_F16,
YVU_420,
YUV_420_BIPLANAR,
UYVY_422,
LAST = UYVY_422
};
// The usage mode affects how a buffer can be used. Only buffers created with
// *_CPU_READ_WRITE_* can be mapped into the client's address space and accessed
// by the CPU. *_CPU_READ_WRITE_PERSISTENT adds the additional condition that
// successive Map() calls (with Unmap() calls between) will return a pointer to
// the same memory contents. SCANOUT implies GPU_READ_WRITE.
// *_VDA_WRITE is for cases where a video decode accellerator writes into
// the buffers.
// TODO(reveman): Add GPU_READ_WRITE for use-cases where SCANOUT is not
// required.
enum class BufferUsage {
GPU_READ,
SCANOUT,
// SCANOUT_CAMERA_READ_WRITE implies CPU_READ_WRITE.
SCANOUT_CAMERA_READ_WRITE,
SCANOUT_CPU_READ_WRITE,
SCANOUT_VDA_WRITE,
GPU_READ_CPU_READ_WRITE,
// TODO(reveman): Merge this with GPU_READ_CPU_READ_WRITE when SurfaceTexture
// backed buffers are single buffered and support it.
GPU_READ_CPU_READ_WRITE_PERSISTENT,
LAST = GPU_READ_CPU_READ_WRITE_PERSISTENT
};
} // namespace gfx
#endif // UI_GFX_BUFFER_TYPES_H_
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