Make skpaint->grpaint flow work for composing draws

include/gpu/GrColor.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 GrColor_DEFINED
 #define GrColor_DEFINED
 
 #include "GrTypes.h"
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkUnPreMultiply.h"
 
 /**
- * GrColor is 4 bytes for R, G, B, A, in a specific order defined below. The components are stored
- * premultiplied.
+ * GrColor is 4 bytes for R, G, B, A, in a specific order defined below. Whether the color is
+ * premultiplied or not depends on the context in which it is being used.
  */
 typedef uint32_t GrColor;
 
 // shift amount to assign a component to a GrColor int
 // These shift values are chosen for compatibility with GL attrib arrays
 // ES doesn't allow BGRA vertex attrib order so if they were not in this order
 // we'd have to swizzle in shaders.
 #ifdef SK_CPU_BENDIAN
     #define GrColor_SHIFT_R     24
     #define GrColor_SHIFT_G     16
@@ skipping 208 matching lines @@
     GR_STATIC_ASSERT(9  == kLATC_GrPixelConfig);
     GR_STATIC_ASSERT(10  == kR11_EAC_GrPixelConfig);
     GR_STATIC_ASSERT(11 == kASTC_12x12_GrPixelConfig);
     GR_STATIC_ASSERT(12 == kRGBA_float_GrPixelConfig);
     GR_STATIC_ASSERT(13 == kAlpha_half_GrPixelConfig);
     GR_STATIC_ASSERT(14 == kRGBA_half_GrPixelConfig);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kFlags) == kGrPixelConfigCnt);
 }
 
 #endif