Cleanup GPU gamut transformation code

src/gpu/SkGpuDevice.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 991 matching lines @@
     // We should be respecting the max tile size by the time we get here.
     SkASSERT(bitmap.width() <= fContext->caps()->maxTileSize() &&
              bitmap.height() <= fContext->caps()->maxTileSize());
 
     sk_sp<GrTexture> texture = GrMakeCachedBitmapTexture(fContext, bitmap, params,
                                                          fDrawContext->sourceGammaTreatment());
     if (nullptr == texture) {
         return;
     }
     sk_sp<GrColorSpaceXform> colorSpaceXform =
-        GrColorSpaceXform::Make(bitmap.colorSpace(), fDrawContext->getColorSpace(),
-                                bitmap.alphaType());
+        GrColorSpaceXform::Make(bitmap.colorSpace(), fDrawContext->getColorSpace());
 
     SkScalar iw = 1.f / texture->width();
     SkScalar ih = 1.f / texture->height();
 
     SkMatrix texMatrix;
     // Compute a matrix that maps the rect we will draw to the src rect.
     texMatrix.setRectToRect(dstRect, srcRect, SkMatrix::kStart_ScaleToFit);
     texMatrix.postScale(iw, ih);
 
     // Construct a GrPaint by setting the bitmap texture as the first effect and then configuring
@@ skipping 104 matching lines @@
         result = sk_ref_sp(special1);
     }
 
     SkASSERT(result->isTextureBacked());
     sk_sp<GrTexture> texture = result->asTextureRef(fContext);
 
     SkPaint tmpUnfiltered(paint);
     tmpUnfiltered.setImageFilter(nullptr);
 
     sk_sp<GrColorSpaceXform> colorSpaceXform =
-        GrColorSpaceXform::Make(result->getColorSpace(), fDrawContext->getColorSpace(),
-                                result->alphaType());
+        GrColorSpaceXform::Make(result->getColorSpace(), fDrawContext->getColorSpace());
     GrPaint grPaint;
     sk_sp<GrFragmentProcessor> fp(GrSimpleTextureEffect::Make(texture.get(),
                                                               std::move(colorSpaceXform),
                                                               SkMatrix::I()));
     if (GrPixelConfigIsAlphaOnly(texture->config())) {
         fp = GrFragmentProcessor::MulOutputByInputUnpremulColor(std::move(fp));
     } else {
         fp = GrFragmentProcessor::MulOutputByInputAlpha(std::move(fp));
     }
     if (!SkPaintToGrPaintReplaceShader(this->context(), fDrawContext.get(), tmpUnfiltered,
@@ skipping 648 matching lines @@
 }
 
 SkImageFilterCache* SkGpuDevice::getImageFilterCache() {
     ASSERT_SINGLE_OWNER
     // We always return a transient cache, so it is freed after each
     // filter traversal.
     return SkImageFilterCache::Create(kDefaultImageFilterCacheSize);
 }
 
 #endif