All source types working for linear pipeline.

src/core/SkPM4fPriv.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPM4fPriv_DEFINED
 #define SkPM4fPriv_DEFINED
 
@@ skipping 44 matching lines @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 static inline Sk4f Sk4f_fromL32(uint32_t src) {
     return to_4f(src) * Sk4f(1.0f/255);
 }
 
 static inline Sk4f Sk4f_fromS32(uint32_t src) {
     return srgb_to_linear(to_4f(src) * Sk4f(1.0f/255));
 }
 
+// Color handling:
+//   SkColor has an ordering of (b, g, r, a) if cast to an Sk4f, so the code swizzles r and b to

[Brian Osman, 2016/05/12 23:28:38]

Is this true? I think it's actually platform-dependent. Last time I looked at
trying to use the Sk4f conversion helpers, I realized that they were intended
for use with PMColor? Looking tat this file, it looks like to_4f_rgba may have
been added since then, and that might be what you want to use here.

[herb_g, 2016/05/13 14:55:23]

I think this is correct for SkColor; SkPMColor is a different story.

+// produce the needed (r, g, b, a) ordering.
+static inline Sk4f Sk4f_from_SkColor(SkColor color) {
+    return swizzle_rb(gTreatSkColorAsSRGB ? Sk4f_fromS32(color) : Sk4f_fromL32(color));
+}
+
 static inline uint32_t Sk4f_toL32(const Sk4f& x4) {
     return to_4b(x4 * Sk4f(255) + Sk4f(0.5f));
 }
 
 static inline uint32_t Sk4f_toS32(const Sk4f& x4) {
     return to_4b(linear_to_srgb(x4) * Sk4f(255) + Sk4f(0.5f));
 }
 
 #endif