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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrTextureProxy_DEFINED
#define GrTextureProxy_DEFINED
#include "GrSamplerState.h"
#include "GrSurfaceProxy.h"
class GrCaps;
class GrDeferredProxyUploader;
class GrProxyProvider;
class GrResourceProvider;
class GrTextureOpList;
class GrTextureProxyPriv;
// This class delays the acquisition of textures until they are actually required
class GrTextureProxy : virtual public GrSurfaceProxy {
public:
GrTextureProxy* asTextureProxy() override { return this; }
const GrTextureProxy* asTextureProxy() const override { return this; }
// Actually instantiate the backing texture, if necessary
bool instantiate(GrResourceProvider*) override;
GrSamplerState::Filter highestFilterMode() const;
// If we are instantiated and have a target, return the mip state of that target. Otherwise
// returns the proxy's mip state from creation time. This is useful for lazy proxies which may
// claim to not need mips at creation time, but the instantiation happens to give us a mipped
// target. In that case we should use that for our benefit to avoid possible copies/mip
// generation later.
GrMipMapped mipMapped() const;
/**
* Return the texture proxy's unique key. It will be invalid if the proxy doesn't have one.
*/
const GrUniqueKey& getUniqueKey() const {
#ifdef SK_DEBUG
if (fTarget && fUniqueKey.isValid()) {
SkASSERT(fTarget->getUniqueKey().isValid());
// It is possible for a non-keyed proxy to have a uniquely keyed resource assigned to
// it. This just means that a future user of the resource will be filling it with unique
// data. However, if the proxy has a unique key its attached resource should also
// have that key.
SkASSERT(fUniqueKey == fTarget->getUniqueKey());
}
#endif
return fUniqueKey;
}
/**
* Internal-only helper class used for manipulations of the resource by the cache.
*/
class CacheAccess;
inline CacheAccess cacheAccess();
inline const CacheAccess cacheAccess() const;
// Provides access to special purpose functions.
GrTextureProxyPriv texPriv();
const GrTextureProxyPriv texPriv() const;
protected:
// DDL TODO: rm the GrSurfaceProxy friending
friend class GrSurfaceProxy; // for ctors
friend class GrProxyProvider; // for ctors
friend class GrTextureProxyPriv;
// Deferred version - when constructed with data the origin is always kTopLeft.
GrTextureProxy(const GrSurfaceDesc& srcDesc, GrMipMapped, SkBackingFit, SkBudgeted,
const void* srcData, size_t srcRowBytes, GrInternalSurfaceFlags);
// Deferred version - no data.
GrTextureProxy(const GrSurfaceDesc& srcDesc, GrSurfaceOrigin, GrMipMapped, SkBackingFit,
SkBudgeted, GrInternalSurfaceFlags);
// Lazy-callback version
// There are two main use cases for lazily-instantiated proxies:
// basic knowledge - width, height, config, origin are known
// minimal knowledge - only config is known.
//
// The basic knowledge version is used for DDL where we know the type of proxy we are going to
// use, but we don't have access to the GPU yet to instantiate it.
//
// The minimal knowledge version is used for CCPR where we are generating an atlas but we do not
// know the final size until flush time.
GrTextureProxy(LazyInstantiateCallback&&, LazyInstantiationType, const GrSurfaceDesc& desc,
GrSurfaceOrigin, GrMipMapped, SkBackingFit, SkBudgeted,
GrInternalSurfaceFlags);
// Wrapped version
GrTextureProxy(sk_sp<GrSurface>, GrSurfaceOrigin);
~GrTextureProxy() override;
sk_sp<GrSurface> createSurface(GrResourceProvider*) const override;
private:
GrMipMapped fMipMapped;
GrUniqueKey fUniqueKey;
GrProxyProvider* fProxyProvider; // only set when fUniqueKey is valid
// Only used for proxies whose contents are being prepared on a worker thread. This object
// stores the texture data, allowing the proxy to remain uninstantiated until flush. At that
// point, the proxy is instantiated, and this data is used to perform an ASAP upload.
std::unique_ptr<GrDeferredProxyUploader> fDeferredUploader;
size_t onUninstantiatedGpuMemorySize() const override;
// Methods made available via GrTextureProxy::CacheAccess
void setUniqueKey(GrProxyProvider*, const GrUniqueKey&);
void clearUniqueKey();
SkDEBUGCODE(void validateLazySurface(const GrSurface*) override;)
// For wrapped proxies the GrTexture pointer is stored in GrIORefProxy.
// For deferred proxies that pointer will be filled in when we need to instantiate
// the deferred resource
typedef GrSurfaceProxy INHERITED;
};
#endif
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