separate out the scaline-choosing to simplify chooseProcs

src/core/SkBitmapProcState.h

 /*
  * Copyright 2007 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 SkBitmapProcState_DEFINED
 #define SkBitmapProcState_DEFINED
 
@@ skipping 116 matching lines @@
     SampleProc32        fSampleProc32;      // chooseProcs
     SampleProc16        fSampleProc16;      // chooseProcs
 
     SkBitmap            fOrigBitmap;        // CONSTRUCTOR
     SkBitmap            fScaledBitmap;      // chooseProcs
 
     SkAutoTUnref<const SkMipMap> fCurrMip;
     bool                fAdjustedMatrix;    // set by possiblyScaleImage
 
     MatrixProc chooseMatrixProc(bool trivial_matrix);
     bool chooseProcs(const SkMatrix& inv, const SkPaint&);

[robertphillips, 2015/01/14 21:54:20]

clampClamp -> clampInBothDirs ?

+    bool chooseScanlineProcs(bool trivialMatrix, bool clampClamp, const SkPaint& paint);
     ShaderProc32 chooseShaderProc32();
 
     // returns false if we did not try to scale the image. In that case, we
     // will need to "lock" its pixels some other way.
     bool possiblyScaleImage();
 
     // returns false if we failed to "lock" the pixels at all. Typically this
     // means we have to abort the shader.
     bool lockBaseBitmap();
 
@@ skipping 59 matching lines @@
 void S32_D16_filter_DXDY(const SkBitmapProcState& s,
                          const uint32_t* xy, int count, uint16_t* colors);
 
 void highQualityFilter32(const SkBitmapProcState &s, int x, int y,
                          SkPMColor *SK_RESTRICT colors, int count);
 void highQualityFilter16(const SkBitmapProcState &s, int x, int y,
                          uint16_t *SK_RESTRICT colors, int count);
 
 
 #endif