Refactored SkColorSpace and added in a Lab PCS GM

tests/CodecTest.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 "Resources.h"
 #include "SkAndroidCodec.h"
 #include "SkBitmap.h"
 #include "SkCodec.h"
 #include "SkCodecImageGenerator.h"
-#include "SkColorSpace_Base.h"
+#include "SkColorSpace_XYZ.h"
 #include "SkData.h"
 #include "SkImageEncoder.h"
 #include "SkFrontBufferedStream.h"
 #include "SkMD5.h"
 #include "SkRandom.h"
 #include "SkStream.h"
 #include "SkStreamPriv.h"
 #include "SkPngChunkReader.h"
 #include "Test.h"
 
@@ skipping 1161 matching lines @@
         REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
     }
 
     result = codec->startIncrementalDecode(infoF16, bm.getPixels(), bm.rowBytes());
     if (supportsIncrementalDecoder) {
         REPORTER_ASSERT(r, SkCodec::kInvalidConversion == result);
     } else {
         REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
     }
 
-    infoF16 = infoF16.makeColorSpace(as_CSB(infoF16.colorSpace())->makeLinearGamma());
+    SkASSERT(SkColorSpace_Base::Type::kXYZ == as_CSB(infoF16.colorSpace())->type());
+    SkColorSpace_XYZ* csXYZ = static_cast<SkColorSpace_XYZ*>(infoF16.colorSpace());
+    infoF16 = infoF16.makeColorSpace(csXYZ->makeLinearGamma());
     result = codec->getPixels(infoF16, bm.getPixels(), bm.rowBytes());
     REPORTER_ASSERT(r, SkCodec::kSuccess == result);
     result = codec->startScanlineDecode(infoF16);
     if (supportsScanlineDecoder) {
         REPORTER_ASSERT(r, SkCodec::kSuccess == result);
     } else {
         REPORTER_ASSERT(r, SkCodec::kUnimplemented == result);
     }
 
     result = codec->startIncrementalDecode(infoF16, bm.getPixels(), bm.rowBytes());
@@ skipping 156 matching lines @@
     REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
     REPORTER_ASSERT(r, rowsDecoded == 0);
 }
 
 DEF_TEST(Codec_IcoIntOverflow, r) {
     // ASAN will complain if there is an issue.
     SkBitmap bitmap;
     const bool success = GetResourceAsBitmap("invalid_images/int_overflow.ico", &bitmap);
     REPORTER_ASSERT(r, !success);
 }