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