Support Float32 output from SkColorSpaceXform

src/codec/SkWebpCodec.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 "SkCodecPriv.h"
 #include "SkColorSpaceXform.h"
 #include "SkWebpCodec.h"
@@ skipping 289 matching lines @@
         case VP8_STATUS_SUSPENDED:
             WebPIDecGetRGB(idec, rowsDecodedPtr, nullptr, nullptr, nullptr);
             rowsDecoded = *rowsDecodedPtr;
             result = kIncompleteInput;
             break;
         default:
             return kInvalidInput;
     }
 
     if (colorXform) {
-        SkAlphaType xformAlphaType = select_alpha_xform(dstInfo.alphaType(),
+        SkColorSpaceXform::ColorFormat colorFormat = select_xform_format(dstInfo.colorType());
+        SkAlphaType xformAlphaType = select_xform_alpha(dstInfo.alphaType(),
                                                         this->getInfo().alphaType());
 
         uint32_t* src = (uint32_t*) config.output.u.RGBA.rgba;
         size_t srcRowBytes = config.output.u.RGBA.stride;
         for (int y = 0; y < rowsDecoded; y++) {
-            colorXform->apply(dst, src, dstInfo.width(), dstInfo.colorType(), xformAlphaType);
+            colorXform->apply(dst, src, dstInfo.width(), colorFormat, xformAlphaType);
             dst = SkTAddOffset<void>(dst, rowBytes);
             src = SkTAddOffset<uint32_t>(src, srcRowBytes);
         }
     }
 
     return result;
 }
 
 SkWebpCodec::SkWebpCodec(int width, int height, const SkEncodedInfo& info,
                          sk_sp<SkColorSpace> colorSpace, SkStream* stream, WebPDemuxer* demux,
                          sk_sp<SkData> data)
     : INHERITED(width, height, info, stream, std::move(colorSpace))
     , fDemux(demux)
     , fData(std::move(data))
 {}