pass cap to dash text

src/core/SkScalerContext.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 SkScalerContext_DEFINED
 #define SkScalerContext_DEFINED
 
@@ skipping 61 matching lines @@
      *  paint and device gamma to be effectively 1.0.
      */
     void ignorePreBlend() {
         setLuminanceColor(SK_ColorTRANSPARENT);
         setPaintGamma(SK_Scalar1);
         setDeviceGamma(SK_Scalar1);
         setContrast(0);
     }
 
     uint8_t     fMaskFormat;
-    uint8_t     fStrokeJoin;
+    uint8_t     fStrokeJoin : 4;
+    uint8_t     fStrokeCap : 4;

[bungeman-skia, 2016/03/09 15:32:57]

This is a cool way to get these bits in, though it would be nice to point out
that these are actually 2 bits each  (there are only three values for each).
This would make things clearer to future bit miners. On the other hand, having

uint8_t fStronkeJoin : 2;
uint8_t fStrokeCap : 2;
uint8_t fExtraBitsThatNeedToBe0 : 4

(and needing to set the 0 bits to 0 in MakeRec) is rather ugly.

It would also be nice to assert that this is enough space (kCapCount and
kJoinCount) though I admit that the possibility of adding to those enums seems
remote.

     uint16_t    fFlags;
     // Warning: when adding members note that the size of this structure
     // must be a multiple of 4. SkDescriptor requires that its arguments be
     // multiples of four and this structure is put in an SkDescriptor in
     // SkPaint::MakeRec.
 
     void    getMatrixFrom2x2(SkMatrix*) const;
     void    getLocalMatrix(SkMatrix*) const;
     void    getSingleMatrix(SkMatrix*) const;
 
@@ skipping 266 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif