| /* |
| * Copyright 2022 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkAlign_DEFINED |
| #define SkAlign_DEFINED |
| |
| #include "include/private/base/SkAssert.h" |
| |
| #include <cstddef> |
| |
| template <typename T> static constexpr T SkAlign2(T x) { return (x + 1) >> 1 << 1; } |
| template <typename T> static constexpr T SkAlign4(T x) { return (x + 3) >> 2 << 2; } |
| template <typename T> static constexpr T SkAlign8(T x) { return (x + 7) >> 3 << 3; } |
| |
| template <typename T> static constexpr bool SkIsAlign2(T x) { return 0 == (x & 1); } |
| template <typename T> static constexpr bool SkIsAlign4(T x) { return 0 == (x & 3); } |
| template <typename T> static constexpr bool SkIsAlign8(T x) { return 0 == (x & 7); } |
| |
| template <typename T> static constexpr T SkAlignPtr(T x) { |
| return sizeof(void*) == 8 ? SkAlign8(x) : SkAlign4(x); |
| } |
| template <typename T> static constexpr bool SkIsAlignPtr(T x) { |
| return sizeof(void*) == 8 ? SkIsAlign8(x) : SkIsAlign4(x); |
| } |
| |
| /** |
| * align up to a power of 2 |
| */ |
| static inline constexpr size_t SkAlignTo(size_t x, size_t alignment) { |
| // The same as alignment && SkIsPow2(value), w/o a dependency cycle. |
| SkASSERT(alignment && (alignment & (alignment - 1)) == 0); |
| return (x + alignment - 1) & ~(alignment - 1); |
| } |
| |
| #endif |