use (temp) gpu-imagefilter-cache for applyFilter

src/gpu/SkGpuDevice.h

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGpuDevice_DEFINED
 #define SkGpuDevice_DEFINED
@@ skipping 117 matching lines @@
 
     bool canHandleImageFilter(const SkImageFilter*) override;
     virtual bool filterImage(const SkImageFilter*, const SkBitmap&,
                              const SkImageFilter::Context&,
                              SkBitmap*, SkIPoint*) override;
 
     bool filterTexture(GrContext*, GrTexture*, int width, int height, const SkImageFilter*,
                        const SkImageFilter::Context&,
                        SkBitmap* result, SkIPoint* offset);
 
+    static SkImageFilter::Cache* NewImageFilterCache();
+
 protected:
     bool onReadPixels(const SkImageInfo&, void*, size_t, int, int) override;
     bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) override;
     bool onShouldDisableLCD(const SkPaint&) const final;
 
     /**  PRIVATE / EXPERIMENTAL -- do not call */
     virtual bool EXPERIMENTAL_drawPicture(SkCanvas* canvas, const SkPicture* picture,
                                           const SkMatrix*, const SkPaint*) override;
 
 private:
@@ skipping 88 matching lines @@
 
     static GrRenderTarget* CreateRenderTarget(GrContext*, SkSurface::Budgeted, const SkImageInfo&,
                                               int sampleCount);
 
     friend class GrAtlasTextContext;
     friend class SkSurface_Gpu;      // for access to surfaceProps
     typedef SkBaseDevice INHERITED;
 };
 
 #endif