Add ability to default incoming image data as sRGB by default.

src/codec/SkCodecImageGenerator.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodecImageGenerator.h"
+#include "SkPM4fPriv.h"
 
 SkImageGenerator* SkCodecImageGenerator::NewFromEncodedCodec(SkData* data) {
     SkCodec* codec = SkCodec::NewFromData(data);
     if (nullptr == codec) {
         return nullptr;
     }
 
     return new SkCodecImageGenerator(codec, data);
 }
 
 // FIXME: We should expose information about the encoded format on the
 //        SkImageGenerator, so the client can interpret the encoded
 //        format and request an output format.  For now, as a workaround,
 //        we guess what output format the client wants.
 static SkImageInfo fix_info(const SkCodec& codec) {
     const SkImageInfo& info = codec.getInfo();
     SkAlphaType alphaType = (kUnpremul_SkAlphaType == info.alphaType()) ? kPremul_SkAlphaType :
             info.alphaType();
 
-    // Crudely guess that the presence of a color space means sRGB.
-    SkColorProfileType profileType = (codec.getColorSpace()) ? kSRGB_SkColorProfileType :
-            kLinear_SkColorProfileType;
+    SkColorProfileType profileType = kLinear_SkColorProfileType;
+    // Crudely guess that the presence of a color space means sRGB, or obey the global sRGB
+    // selector.
+    if (gTreatSkColorAsSRGB || codec.getColorSpace()) {
+        profileType = kSRGB_SkColorProfileType;
+    }
 
     return SkImageInfo::Make(info.width(), info.height(), info.colorType(), alphaType, profileType);
 }
 
 SkCodecImageGenerator::SkCodecImageGenerator(SkCodec* codec, SkData* data)
     : INHERITED(fix_info(*codec))
     , fCodec(codec)
     , fData(SkRef(data))
 {}
 
@@ skipping 24 matching lines @@
     SkCodec::Result result = fCodec->getYUV8Planes(sizeInfo, planes);
 
     switch (result) {
         case SkCodec::kSuccess:
         case SkCodec::kIncompleteInput:
             return true;
         default:
             return false;
     }
 }