| |
| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrGpuResourceCacheAccess_DEFINED |
| #define GrGpuResourceCacheAccess_DEFINED |
| |
| #include "GrGpuResource.h" |
| |
| /** |
| * This class allows code internal to Skia privileged access to manage the cache keys of a |
| * GrGpuResource object. |
| */ |
| class GrGpuResource::CacheAccess { |
| public: |
| /** |
| * Sets a content key for the resource. If the resource was previously cached as scratch it will |
| * be converted to a content resource. Currently this may only be called once per resource. It |
| * fails if there is already a resource with the same content key. TODO: make this supplant the |
| * resource that currently is using the content key, allow resources' content keys to change, |
| * and allow removal of a content key to convert a resource back to scratch. |
| */ |
| bool setContentKey(const GrResourceKey& contentKey) { |
| return fResource->setContentKey(contentKey); |
| } |
| |
| /** |
| * Is the resource currently cached as scratch? This means it has a valid scratch key and does |
| * not have a content key. |
| */ |
| bool isScratch() const { |
| return NULL == this->getContentKey() && fResource->fScratchKey.isValid(); |
| } |
| |
| /** |
| * If this resource can be used as a scratch resource this returns a valid scratch key. |
| * Otherwise it returns a key for which isNullScratch is true. The resource may currently be |
| * used as a content resource rather than scratch. Check isScratch(). |
| */ |
| const GrScratchKey& getScratchKey() const { return fResource->fScratchKey; } |
| |
| /** |
| * If the resource has a scratch key, the key will be removed. Since scratch keys are installed |
| * at resource creation time, this means the resource will never again be used as scratch. |
| */ |
| void removeScratchKey() const { fResource->removeScratchKey(); } |
| |
| /** |
| * If the resource is currently cached by a content key, the key is returned, otherwise NULL. |
| */ |
| const GrResourceKey* getContentKey() const { |
| if (fResource->fFlags & GrGpuResource::kContentKeySet_Flag) { |
| return &fResource->fContentKey; |
| } |
| return NULL; |
| } |
| |
| /** |
| * Is the resource object wrapping an externally allocated GPU resource? |
| */ |
| bool isWrapped() const { return GrGpuResource::kWrapped_LifeCycle == fResource->fLifeCycle; } |
| |
| /** |
| * Does the resource count against the resource budget? |
| */ |
| bool isBudgeted() const { return GrGpuResource::kCached_LifeCycle == fResource->fLifeCycle; } |
| |
| /** |
| * Called by the cache to delete the resource under normal circumstances. |
| */ |
| void release() { |
| fResource->release(); |
| if (fResource->isPurgable()) { |
| SkDELETE(fResource); |
| } |
| } |
| |
| /** |
| * Called by the cache to delete the resource when the backend 3D context is no longer valid. |
| */ |
| void abandon() { |
| fResource->abandon(); |
| if (fResource->isPurgable()) { |
| SkDELETE(fResource); |
| } |
| } |
| |
| private: |
| CacheAccess(GrGpuResource* resource) : fResource(resource) { } |
| CacheAccess(const CacheAccess& that) : fResource(that.fResource) { } |
| CacheAccess& operator=(const CacheAccess&); // unimpl |
| |
| // No taking addresses of this type. |
| const CacheAccess* operator&() const; |
| CacheAccess* operator&(); |
| |
| GrGpuResource* fResource; |
| |
| friend class GrGpuResource; // to construct/copy this type. |
| }; |
| |
| inline GrGpuResource::CacheAccess GrGpuResource::cacheAccess() { return CacheAccess(this); } |
| |
| inline const GrGpuResource::CacheAccess GrGpuResource::cacheAccess() const { |
| return CacheAccess(const_cast<GrGpuResource*>(this)); |
| } |
| |
| #endif |