pin as texture api

src/image/SkImage_Base.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImage_Base_DEFINED
 #define SkImage_Base_DEFINED
 
+#include "GrTexture.h"
 #include "SkAtomics.h"
 #include "SkImage.h"
 #include "SkSurface.h"
 
 #include <new>
 
 class GrTextureParams;
 class SkImageCacherator;
 
 enum {
@@ skipping 12 matching lines @@
 
     virtual bool onPeekPixels(SkPixmap*) const { return false; }
 
     virtual const SkBitmap* onPeekBitmap() const { return nullptr; }
 
     // Default impl calls onDraw
     virtual bool onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
                               int srcX, int srcY, CachingHint) const;
 
     virtual GrTexture* peekTexture() const { return nullptr; }
+    virtual sk_sp<GrTexture> refPinnedTexture(uint32_t* uniqueID) const { return nullptr; }
     virtual SkImageCacherator* peekCacherator() const { return nullptr; }
 
     // return a read-only copy of the pixels. We promise to not modify them,
     // but only inspect them (or encode them).
     virtual bool getROPixels(SkBitmap*, CachingHint = kAllow_CachingHint) const = 0;
 
     virtual sk_sp<SkSurface> onNewSurface(const SkImageInfo& info) const {
         return SkSurface::MakeRaster(info);
     }
 
     // Caller must call unref when they are done.
     virtual GrTexture* asTextureRef(GrContext*, const GrTextureParams&,
                                     SkSourceGammaTreatment) const = 0;
 
     virtual sk_sp<SkImage> onMakeSubset(const SkIRect&) const = 0;
 
     // If a ctx is specified, then only gpu-specific formats are requested.
     virtual SkData* onRefEncoded(GrContext*) const { return nullptr; }
 
     virtual bool onAsLegacyBitmap(SkBitmap*, LegacyBitmapMode) const;
 
     virtual bool onIsLazyGenerated() const { return false; }
 
     // Call when this image is part of the key to a resourcecache entry. This allows the cache
     // to know automatically those entries can be purged when this SkImage deleted.
     void notifyAddedToCache() const {
         fAddedToCache.store(true);
     }
 
+    virtual void onPinAsTexture(GrContext*) const {}
+    virtual void onUnpinAsTexture(GrContext*) const {}
+
 private:
     // Set true by caches when they cache content that's derived from the current pixels.
     mutable SkAtomic<bool> fAddedToCache;
 
     typedef SkImage INHERITED;
 };
 
 static inline SkImage_Base* as_IB(SkImage* image) {
     return static_cast<SkImage_Base*>(image);
 }
 
 static inline SkImage_Base* as_IB(const sk_sp<SkImage>& image) {
     return static_cast<SkImage_Base*>(image.get());
 }
 
 static inline const SkImage_Base* as_IB(const SkImage* image) {
     return static_cast<const SkImage_Base*>(image);
 }
 
 #endif