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