| // 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_FORMAT_UTIL_H_ |
| #define UI_GFX_BUFFER_FORMAT_UTIL_H_ |
| |
| #include <stddef.h> |
| |
| #include <vector> |
| |
| #include "ui/gfx/buffer_types.h" |
| #include "ui/gfx/geometry/size.h" |
| #include "ui/gfx/gfx_export.h" |
| |
| namespace gfx { |
| |
| // Returns a vector containing all buffer formats. |
| GFX_EXPORT std::vector<BufferFormat> GetBufferFormatsForTesting(); |
| |
| // Returns the number of bits of alpha for the specified format. |
| GFX_EXPORT size_t AlphaBitsForBufferFormat(BufferFormat format); |
| |
| // Returns the number of planes for |format|. |
| GFX_EXPORT size_t NumberOfPlanesForLinearBufferFormat(BufferFormat format); |
| |
| // Returns the subsampling factor applied to the given zero-indexed |plane| of |
| // |format| both horizontally and vertically. |
| GFX_EXPORT size_t SubsamplingFactorForBufferFormat(BufferFormat format, |
| size_t plane); |
| |
| // Returns the number of bytes used to store a row of the given zero-indexed |
| // |plane| of |format|. |
| GFX_EXPORT size_t RowSizeForBufferFormat(size_t width, |
| BufferFormat format, |
| size_t plane); |
| GFX_EXPORT bool RowSizeForBufferFormatChecked(size_t width, |
| BufferFormat format, |
| size_t plane, |
| size_t* size_in_bytes) |
| WARN_UNUSED_RESULT; |
| |
| // Returns the number of bytes used to store all the planes of a given |format|. |
| GFX_EXPORT size_t BufferSizeForBufferFormat(const Size& size, |
| BufferFormat format); |
| GFX_EXPORT bool BufferSizeForBufferFormatChecked(const Size& size, |
| BufferFormat format, |
| size_t* size_in_bytes) |
| WARN_UNUSED_RESULT; |
| |
| GFX_EXPORT size_t BufferOffsetForBufferFormat(const Size& size, |
| BufferFormat format, |
| size_t plane); |
| |
| // Returns the name of |format| as a string. |
| GFX_EXPORT const char* BufferFormatToString(BufferFormat format); |
| |
| } // namespace gfx |
| |
| #endif // UI_GFX_BUFFER_FORMAT_UTIL_H_ |