Gamma-correctness pushed into Skia, top-down.

src/effects/SkXfermodeImageFilter.cpp

 /*
  * Copyright 2013 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkXfermodeImageFilter.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
@@ skipping 155 matching lines @@
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fWidth = bounds.width();
     desc.fHeight = bounds.height();
     desc.fConfig = kSkia8888_GrPixelConfig;
     SkAutoTUnref<GrTexture> dst(context->textureProvider()->createApproxTexture(desc));
     if (!dst) {
         return false;
     }
 
     GrPaint paint;
+    // SRGBTODO: AllowSRGBInputs?
     SkAutoTUnref<const GrFragmentProcessor> bgFP;
 
     if (backgroundTex) {
         SkMatrix backgroundMatrix;
         backgroundMatrix.setIDiv(backgroundTex->width(), backgroundTex->height());
         backgroundMatrix.preTranslate(SkIntToScalar(-backgroundOffset.fX),
                                       SkIntToScalar(-backgroundOffset.fY));
         bgFP.reset(GrTextureDomainEffect::Create(
                             backgroundTex, backgroundMatrix,
                             GrTextureDomain::MakeTexelDomain(backgroundTex, background.bounds()),
@@ skipping 54 matching lines @@
     matrix.setTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top()));
     drawContext->drawRect(GrClip::WideOpen(), paint, matrix, SkRect::Make(bounds));
 
     offset->fX = bounds.left();
     offset->fY = bounds.top();
     GrWrapTextureInBitmap(dst, bounds.width(), bounds.height(), false, result);
     return true;
 }
 
 #endif