allow subpixel positioning w/ bitmap filtering

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
@@ skipping 154 matching lines @@
 
     SkBitmapFilter* fBitmapFilter;
 
     // If supported, sets fShaderProc32 and fShaderProc16 and returns true,
     // otherwise returns false.
     bool setBitmapFilterProcs();
 
     // Return false if we failed to setup for fast translate (e.g. overflow)
     bool setupForTranslate();
 
+    bool isInverseTrivial() const;
+
 #ifdef SK_DEBUG
     static void DebugMatrixProc(const SkBitmapProcState&,
                                 uint32_t[], int count, int x, int y);
 #endif
 };
 
 /*  Macros for packing and unpacking pairs of 16bit values in a 32bit uint.
     Used to allow access to a stream of uint16_t either one at a time, or
     2 at a time by unpacking a uint32_t
  */
@@ skipping 38 matching lines @@
 void S32_D16_filter_DX(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