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_XYZTRC.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(as_CSB(infoF16.colorSpace())->toXYZD50());
+    SkColorSpace_XYZTRC* csXYZ = static_cast<SkColorSpace_XYZTRC*>(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 149 matching lines @@
     auto result = codec->startIncrementalDecode(info, bm.getPixels(), bm.rowBytes());
     REPORTER_ASSERT(r, result == SkCodec::kSuccess);
 
     // This is an arbitrary value. The important fact is that it is not zero, and rowsDecoded
     // should get set to zero by incrementalDecode.
     int rowsDecoded = 77;
     result = codec->incrementalDecode(&rowsDecoded);
     REPORTER_ASSERT(r, result == SkCodec::kIncompleteInput);
     REPORTER_ASSERT(r, rowsDecoded == 0);
 }