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- /*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkImage_Lazy_DEFINED
- #define SkImage_Lazy_DEFINED
- #include "include/private/SkMutex.h"
- #include "src/image/SkImage_Base.h"
- #if SK_SUPPORT_GPU
- #include "src/gpu/GrTextureMaker.h"
- #endif
- class SharedGenerator;
- class SkImage_Lazy : public SkImage_Base {
- public:
- struct Validator {
- Validator(sk_sp<SharedGenerator>, const SkIRect* subset, const SkColorType* colorType,
- sk_sp<SkColorSpace> colorSpace);
- operator bool() const { return fSharedGenerator.get(); }
- sk_sp<SharedGenerator> fSharedGenerator;
- SkImageInfo fInfo;
- SkIPoint fOrigin;
- sk_sp<SkColorSpace> fColorSpace;
- uint32_t fUniqueID;
- };
- SkImage_Lazy(Validator* validator);
- ~SkImage_Lazy() override;
- SkIRect onGetSubset() const override {
- return SkIRect::MakeXYWH(fOrigin.fX, fOrigin.fY, this->width(), this->height());
- }
- bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY,
- CachingHint) const override;
- #if SK_SUPPORT_GPU
- sk_sp<GrTextureProxy> asTextureProxyRef(GrRecordingContext*,
- const GrSamplerState&,
- SkScalar scaleAdjust[2]) const override;
- sk_sp<SkCachedData> getPlanes(SkYUVASizeInfo*, SkYUVAIndex[4],
- SkYUVColorSpace*, const void* planes[4]) override;
- #endif
- sk_sp<SkData> onRefEncoded() const override;
- sk_sp<SkImage> onMakeSubset(GrRecordingContext*, const SkIRect&) const override;
- bool getROPixels(SkBitmap*, CachingHint) const override;
- bool onIsLazyGenerated() const override { return true; }
- sk_sp<SkImage> onMakeColorTypeAndColorSpace(GrRecordingContext*,
- SkColorType, sk_sp<SkColorSpace>) const override;
- bool onIsValid(GrContext*) const override;
- #if SK_SUPPORT_GPU
- // Returns the texture proxy. If we're going to generate and cache the texture, we should use
- // the passed in key (if the key is valid). If genType is AllowedTexGenType::kCheap and the
- // texture is not trivial to construct, returns nullptr.
- sk_sp<GrTextureProxy> lockTextureProxy(GrRecordingContext*,
- const GrUniqueKey& key,
- SkImage::CachingHint,
- bool willBeMipped,
- GrTextureMaker::AllowedTexGenType genType) const;
- void makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, GrUniqueKey* cacheKey) const;
- #endif
- private:
- class ScopedGenerator;
- // Note that this->imageInfo() is not necessarily the info from the generator. It may be
- // cropped by onMakeSubset and its color type/space may be changed by
- // onMakeColorTypeAndColorSpace.
- sk_sp<SharedGenerator> fSharedGenerator;
- const SkIPoint fOrigin;
- uint32_t fUniqueID;
- // Repeated calls to onMakeColorTypeAndColorSpace will result in a proliferation of unique IDs
- // and SkImage_Lazy instances. Cache the result of the last successful call.
- mutable SkMutex fOnMakeColorTypeAndSpaceMutex;
- mutable sk_sp<SkImage> fOnMakeColorTypeAndSpaceResult;
- #if SK_SUPPORT_GPU
- // When the SkImage_Lazy goes away, we will iterate over all the unique keys we've used and
- // send messages to the GrContexts to say the unique keys are no longer valid. The GrContexts
- // can then release the resources, conntected with the those unique keys, from their caches.
- mutable SkTDArray<GrUniqueKeyInvalidatedMessage*> fUniqueKeyInvalidatedMessages;
- #endif
- typedef SkImage_Base INHERITED;
- };
- #endif
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