Introduce GrColorSpaceXform, for gamut conversion on textures

src/effects/SkGpuBlurUtils.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuBlurUtils.h"
 
 #include "SkRect.h"
@@ skipping 257 matching lines @@
         SkMatrix matrix;
         matrix.setIDiv(srcTexture->width(), srcTexture->height());
         SkIRect dstRect(srcRect);
         if (srcBounds && i == 1) {
             SkRect domain;
             matrix.mapRect(&domain, SkRect::Make(*srcBounds));
             domain.inset((i < scaleFactorX) ? SK_ScalarHalf / srcTexture->width() : 0.0f,
                          (i < scaleFactorY) ? SK_ScalarHalf / srcTexture->height() : 0.0f);
             sk_sp<GrFragmentProcessor> fp(GrTextureDomainEffect::Make(
                                                         srcTexture.get(),
+                                                        nullptr,
                                                         matrix,
                                                         domain,
                                                         GrTextureDomain::kDecal_Mode,
                                                         GrTextureParams::kBilerp_FilterMode));
             paint.addColorFragmentProcessor(std::move(fp));
             srcRect.offset(-srcOffset);
             srcOffset.set(0, 0);
         } else {
             GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
-            paint.addColorTextureProcessor(srcTexture.get(), matrix, params);
+            paint.addColorTextureProcessor(srcTexture.get(), nullptr, matrix, params);
         }
         paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
         shrink_irect_by_2(&dstRect, i < scaleFactorX, i < scaleFactorY);
 
         dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(),
                                        SkRect::Make(dstRect), SkRect::Make(srcRect));
 
         srcDrawContext = dstDrawContext;
         srcRect = dstRect;
         srcTexture = srcDrawContext->asTexture();
@@ skipping 56 matching lines @@
         srcDrawContext->clear(&clearRect, 0x0, false);
 
         SkMatrix matrix;
         matrix.setIDiv(srcDrawContext->width(), srcDrawContext->height());
 
         GrPaint paint;
         paint.setGammaCorrect(gammaCorrect);
         // FIXME:  this should be mitchell, not bilinear.
         GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
         sk_sp<GrTexture> tex(srcDrawContext->asTexture());
-        paint.addColorTextureProcessor(tex.get(), matrix, params);
+        paint.addColorTextureProcessor(tex.get(), nullptr, matrix, params);
         paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode);
 
         SkIRect dstRect(srcRect);
         scale_irect(&dstRect, scaleFactorX, scaleFactorY);
 
         dstDrawContext->fillRectToRect(clip, paint, SkMatrix::I(),
                                        SkRect::Make(dstRect), SkRect::Make(srcRect));
 
         srcDrawContext = dstDrawContext;
         srcRect = dstRect;
         dstDrawContext.swap(tmpDrawContext);
     }
 
     return srcDrawContext;
 }
 
 }
 
 #endif