| // 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, |
| RGBA_4444, |
| RGBX_8888, |
| RGBA_8888, |
| BGRX_8888, |
| BGRA_8888, |
| YUV_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. |
| // TODO(reveman): Add GPU_READ_WRITE for use-cases where SCANOUT is not |
| // required. |
| enum class BufferUsage { |
| GPU_READ, |
| SCANOUT, |
| 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_ |