Gamma-correctness pushed into Skia, top-down.

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 2f6477c41dec49be7cdc59cb3014364efff34a5a..ff74dddab52634f4c22edbcdfd64d8e689fad6b6 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -1334,6 +1334,15 @@ SkImageInfo SkCanvas::imageInfo() const {
     }
 }
 
+const SkSurfaceProps* SkCanvas::props() const {
+    SkBaseDevice* dev = this->getDevice();
+    if (dev) {
+        return &fProps;
+    } else {
+        return nullptr;
+    }
+}
+
 #ifdef SK_SUPPORT_LEGACY_PEEKPIXELS_PARMS
 const void* SkCanvas::peekPixels(SkImageInfo* info, size_t* rowBytes) {
     SkPixmap pmap;
@@ -1406,7 +1415,8 @@ void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y,
             SkAutoTUnref<SkImageFilter::Cache> cache(dstDev->getImageFilterCache());
             SkImageFilter::Context ctx(matrix, clipBounds, cache.get());
 
-            sk_sp<SkSpecialImage> srcImg(SkSpecialImage::internal_fromBM(&proxy, srcBM));
+            sk_sp<SkSpecialImage> srcImg(SkSpecialImage::internal_fromBM(&proxy, srcBM,
+                                                                         &dstDev->surfaceProps()));
             if (!srcImg) {
                 continue; // something disastrous happened
             }