add support for new bitmapshader context

src/core/SkBitmapProcShader.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmapProcShader_DEFINED
 #define SkBitmapProcShader_DEFINED
 
 #include "SkShader.h"
 #include "SkSmallAllocator.h"
 
 struct SkBitmapProcState;
 class SkBitmapProvider;
 
 class SkBitmapProcShader : public SkShader {
 public:
     SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty,
                        const SkMatrix* localMatrix = nullptr);
 
     bool isOpaque() const override;
 
-    size_t contextSize(const ContextRec& rec) const override { return ContextSize(rec); }
+    size_t contextSize(const ContextRec& rec) const override {
+        return ContextSize(rec, fRawBitmap.info());
+    }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapProcShader)
 
 #if SK_SUPPORT_GPU
     const GrFragmentProcessor* asFragmentProcessor(GrContext*, const SkMatrix& viewM,
                                                    const SkMatrix*, SkFilterQuality) const override;
 #endif
 
 protected:
     void flatten(SkWriteBuffer&) const override;
     Context* onCreateContext(const ContextRec&, void* storage) const override;
     bool onIsABitmap(SkBitmap*, SkMatrix*, TileMode*) const override;
 
-    SkBitmap    fRawBitmap;   // experimental for RLE encoding
+    SkBitmap    fRawBitmap;
     uint8_t     fTileModeX, fTileModeY;
 
 private:
     friend class SkImageShader;
 
-    static size_t ContextSize(const ContextRec&);
+    static size_t ContextSize(const ContextRec&, const SkImageInfo& srcInfo);
     static Context* MakeContext(const SkShader&, TileMode tmx, TileMode tmy,
                                 const SkBitmapProvider&, const ContextRec&, void* storage);
 
     typedef SkShader INHERITED;
 };
 
 // Commonly used allocator. It currently is only used to allocate up to 3 objects. The total
 // bytes requested is calculated using one of our large shaders, its context size plus the size of
 // an Sk3DBlitter in SkDraw.cpp
 // Note that some contexts may contain other contexts (e.g. for compose shaders), but we've not
 // yet found a situation where the size below isn't big enough.
-typedef SkSmallAllocator<3, 1500> SkTBlitterAllocator;
+typedef SkSmallAllocator<3, 2100> SkTBlitterAllocator;
 
 // If alloc is non-nullptr, it will be used to allocate the returned SkShader, and MUST outlive
 // the SkShader.
 SkShader* SkCreateBitmapShader(const SkBitmap& src, SkShader::TileMode, SkShader::TileMode,
                                const SkMatrix* localMatrix, SkTBlitterAllocator* alloc);
 
 #endif