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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 "SkImage_Base.h"
#include "SkMutex.h"
#if SK_SUPPORT_GPU
#include "GrTextureMaker.h"
#endif
class SharedGenerator;
class SkImage_Lazy : public SkImage_Base {
public:
struct Validator {
Validator(sk_sp<SharedGenerator>, const SkIRect* subset, 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;
SkImageInfo onImageInfo() const override {
return fInfo;
}
SkIRect onGetSubset() const override {
return SkIRect::MakeXYWH(fOrigin.fX, fOrigin.fY, fInfo.width(), fInfo.height());
}
bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY,
CachingHint) const override;
#if SK_SUPPORT_GPU
sk_sp<GrTextureProxy> asTextureProxyRef(GrContext*,
const GrSamplerState&,
SkScalar scaleAdjust[2]) const override;
sk_sp<SkCachedData> getPlanes(SkYUVSizeInfo*, SkYUVAIndex[4],
SkYUVColorSpace*, const void* planes[4]) override;
#endif
sk_sp<SkData> onRefEncoded() const override;
sk_sp<SkImage> onMakeSubset(const SkIRect&) const override;
bool getROPixels(SkBitmap*, CachingHint) const override;
bool onIsLazyGenerated() const override { return true; }
sk_sp<SkImage> onMakeColorSpace(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(GrContext*,
const GrUniqueKey& key,
SkImage::CachingHint,
bool willBeMipped,
GrTextureMaker::AllowedTexGenType genType) const;
// TODO: Need to pass in dstColorSpace to fold into key here?
void makeCacheKeyFromOrigKey(const GrUniqueKey& origKey, GrUniqueKey* cacheKey) const;
#endif
private:
class ScopedGenerator;
sk_sp<SharedGenerator> fSharedGenerator;
// Note that fInfo is not necessarily the info from the generator. It may be cropped by
// onMakeSubset and its color space may be changed by onMakeColorSpace.
const SkImageInfo fInfo;
const SkIPoint fOrigin;
uint32_t fUniqueID;
// Repeated calls to onMakeColorSpace will result in a proliferation of unique IDs and
// SkImage_Lazy instances. Cache the result of the last successful onMakeColorSpace call.
mutable SkMutex fOnMakeColorSpaceMutex;
mutable sk_sp<SkColorSpace> fOnMakeColorSpaceTarget;
mutable sk_sp<SkImage> fOnMakeColorSpaceResult;
#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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