зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
1.8 KiB
C++
69 строки
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_BorderCache_h_
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#define mozilla_BorderCache_h_
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#include "mozilla/gfx/2D.h"
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#include "mozilla/HashFunctions.h"
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#include "nsDataHashtable.h"
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#include "PLDHashTable.h"
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namespace mozilla {
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// Cache for best overlap and best dashLength.
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struct FourFloats {
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typedef mozilla::gfx::Float Float;
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Float n[4];
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FourFloats() {
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n[0] = 0.0f;
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n[1] = 0.0f;
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n[2] = 0.0f;
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n[3] = 0.0f;
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}
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FourFloats(Float a, Float b, Float c, Float d) {
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n[0] = a;
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n[1] = b;
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n[2] = c;
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n[3] = d;
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}
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bool operator==(const FourFloats& aOther) const {
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return n[0] == aOther.n[0] && n[1] == aOther.n[1] && n[2] == aOther.n[2] &&
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n[3] == aOther.n[3];
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}
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};
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class FourFloatsHashKey : public PLDHashEntryHdr {
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public:
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typedef const FourFloats& KeyType;
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typedef const FourFloats* KeyTypePointer;
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explicit FourFloatsHashKey(KeyTypePointer aKey) : mValue(*aKey) {}
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FourFloatsHashKey(const FourFloatsHashKey& aToCopy)
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: mValue(aToCopy.mValue) {}
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~FourFloatsHashKey() = default;
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KeyType GetKey() const { return mValue; }
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bool KeyEquals(KeyTypePointer aKey) const { return *aKey == mValue; }
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static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
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static PLDHashNumber HashKey(KeyTypePointer aKey) {
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return HashBytes(aKey->n, sizeof(mozilla::gfx::Float) * 4);
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}
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enum { ALLOW_MEMMOVE = true };
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private:
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const FourFloats mValue;
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};
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} // namespace mozilla
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#endif /* mozilla_BorderCache_h_ */
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