Gamma-correctness pushed into Skia, top-down.

src/gpu/GrBlurUtils.cpp

Index: src/gpu/GrBlurUtils.cpp
diff --git a/src/gpu/GrBlurUtils.cpp b/src/gpu/GrBlurUtils.cpp
index 65b18a5edcf7f50f1232e2bcb51cfc2bda54845a..b89f2bd8f3a2f3e52ef7564acfb85c38144115ef 100644
--- a/src/gpu/GrBlurUtils.cpp
+++ b/src/gpu/GrBlurUtils.cpp
@@ -132,6 +132,7 @@ static GrTexture* create_mask_GPU(GrContext* context,
     drawContext->clear(nullptr, 0x0, true);
 
     GrPaint tempPaint;
+    // SRGBTODO: AllowSRGBInputs?
     tempPaint.setAntiAlias(doAA);
     tempPaint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op);
 
@@ -228,7 +229,8 @@ static void draw_path_with_mask_filter(GrContext* context,
         if (mask) {
             GrTexture* filtered;
 
-            if (maskFilter->filterMaskGPU(mask, viewMatrix, maskRect, &filtered, true)) {
+            if (maskFilter->filterMaskGPU(mask, viewMatrix, maskRect, &filtered, true,
+                                          paint->getAllowSRGBInputs())) {
                 // filterMaskGPU gives us ownership of a ref to the result
                 SkAutoTUnref<GrTexture> atu(filtered);
                 if (draw_mask(drawContext, clip, viewMatrix, maskRect, paint, filtered)) {
@@ -335,7 +337,9 @@ void GrBlurUtils::drawPathWithMaskFilter(GrContext* context,
     }
 
     GrPaint grPaint;
-    if (!SkPaintToGrPaint(context, paint, viewMatrix, &grPaint)) {
+    // SRGBTODO: AllowSRGBInputs? (Usually correct, because drawContext came from device?)
+    if (!SkPaintToGrPaint(context, paint, viewMatrix, drawContext->allowSRGBInputs(),
+                          &grPaint)) {
         return;
     }