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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrResourceCache2.h"
#include "GrGpuResource.h"
#include "SkRefCnt.h"
GrResourceCache2::~GrResourceCache2() {
this->releaseAll();
}
void GrResourceCache2::insertResource(GrGpuResource* resource) {
SkASSERT(resource);
SkASSERT(!resource->wasDestroyed());
SkASSERT(!this->isInCache(resource));
fResources.addToHead(resource);
++fCount;
if (!resource->getScratchKey().isNullScratch()) {
fScratchMap.insert(resource->getScratchKey(), resource);
}
}
void GrResourceCache2::removeResource(GrGpuResource* resource) {
SkASSERT(this->isInCache(resource));
fResources.remove(resource);
if (!resource->getScratchKey().isNullScratch()) {
fScratchMap.remove(resource->getScratchKey(), resource);
}
--fCount;
}
void GrResourceCache2::abandonAll() {
while (GrGpuResource* head = fResources.head()) {
SkASSERT(!head->wasDestroyed());
head->abandon();
// abandon should have already removed this from the list.
SkASSERT(head != fResources.head());
}
SkASSERT(!fScratchMap.count());
SkASSERT(!fCount);
}
void GrResourceCache2::releaseAll() {
while (GrGpuResource* head = fResources.head()) {
SkASSERT(!head->wasDestroyed());
head->release();
// release should have already removed this from the list.
SkASSERT(head != fResources.head());
}
SkASSERT(!fScratchMap.count());
SkASSERT(!fCount);
}
class GrResourceCache2::AvailableForScratchUse {
public:
AvailableForScratchUse(bool rejectPendingIO) : fRejectPendingIO(rejectPendingIO) { }
bool operator()(const GrGpuResource* resource) const {
if (!resource->reffedOnlyByCache() || !resource->isScratch()) {
return false;
}
return !fRejectPendingIO || !resource->internalHasPendingIO();
}
private:
bool fRejectPendingIO;
};
GrGpuResource* GrResourceCache2::findAndRefScratchResource(const GrResourceKey& scratchKey,
uint32_t flags) {
SkASSERT(scratchKey.isScratch());
if (flags & (kPreferNoPendingIO_ScratchFlag | kRequireNoPendingIO_ScratchFlag)) {
GrGpuResource* resource = fScratchMap.find(scratchKey, AvailableForScratchUse(true));
if (resource) {
return SkRef(resource);
} else if (flags & kRequireNoPendingIO_ScratchFlag) {
return NULL;
}
// TODO: fail here when kPrefer is specified, we didn't find a resource without pending io,
// but there is still space in our budget for the resource.
}
return SkSafeRef(fScratchMap.find(scratchKey, AvailableForScratchUse(false)));
}
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