gecko-dev/layout/base/MaskLayerImageCache.cpp

88 lines
2.1 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/. */
#include "MaskLayerImageCache.h"
#include "ImageContainer.h"
using namespace mozilla::layers;
namespace mozilla {
MaskLayerImageCache::MaskLayerImageCache()
{
MOZ_COUNT_CTOR(MaskLayerImageCache);
}
MaskLayerImageCache::~MaskLayerImageCache()
{
MOZ_COUNT_DTOR(MaskLayerImageCache);
}
/* static */ PLDHashOperator
MaskLayerImageCache::SweepFunc(MaskLayerImageEntry* aEntry,
void* aUserArg)
{
const MaskLayerImageCache::MaskLayerImageKey* key = aEntry->mKey;
if (key->mLayerCount == 0) {
return PL_DHASH_REMOVE;
}
return PL_DHASH_NEXT;
}
void
MaskLayerImageCache::Sweep()
{
mMaskImageContainers.EnumerateEntries(SweepFunc, nullptr);
}
ImageContainer*
MaskLayerImageCache::FindImageFor(const MaskLayerImageKey** aKey)
{
if (MaskLayerImageEntry* entry = mMaskImageContainers.GetEntry(**aKey)) {
*aKey = entry->mKey.get();
return entry->mContainer;
}
return nullptr;
}
void
MaskLayerImageCache::PutImage(const MaskLayerImageKey* aKey, ImageContainer* aContainer)
{
MaskLayerImageEntry* entry = mMaskImageContainers.PutEntry(*aKey);
entry->mContainer = aContainer;
}
// This case is particularly 'clever' because it uses AddRef/Release to track the use
// not to release the object.
template<>
struct HasDangerousPublicDestructor<MaskLayerImageCache::MaskLayerImageKey>
{
static const bool value = true;
};
MaskLayerImageCache::MaskLayerImageKey::MaskLayerImageKey()
: mLayerCount(0)
, mRoundedClipRects()
{
MOZ_COUNT_CTOR(MaskLayerImageKey);
}
MaskLayerImageCache::MaskLayerImageKey::MaskLayerImageKey(const MaskLayerImageKey& aKey)
: mLayerCount(aKey.mLayerCount)
, mRoundedClipRects(aKey.mRoundedClipRects)
{
MOZ_COUNT_CTOR(MaskLayerImageKey);
}
MaskLayerImageCache::MaskLayerImageKey::~MaskLayerImageKey()
{
MOZ_COUNT_DTOR(MaskLayerImageKey);
}
}