Experiment to track coverage in a layer

Bug: skia:
Change-Id: I5ed334f63e64991944394dc8103092a2c6280546
Reviewed-on: https://skia-review.googlesource.com/122000
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 3f2439d538..52644727a6 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -644,7 +644,7 @@ SkCanvas::SkCanvas(const SkBitmap& bitmap, const SkSurfaceProps& props)
 {
     inc_canvas();
 
-    sk_sp<SkBaseDevice> device(new SkBitmapDevice(bitmap, fProps));
+    sk_sp<SkBaseDevice> device(new SkBitmapDevice(bitmap, fProps, nullptr, nullptr));
     this->init(device.get(), kDefault_InitFlags);
 }
 
@@ -656,7 +656,7 @@ SkCanvas::SkCanvas(const SkBitmap& bitmap, std::unique_ptr<SkRasterHandleAllocat
 {
     inc_canvas();
 
-    sk_sp<SkBaseDevice> device(new SkBitmapDevice(bitmap, fProps, hndl));
+    sk_sp<SkBaseDevice> device(new SkBitmapDevice(bitmap, fProps, hndl, nullptr));
     this->init(device.get(), kDefault_InitFlags);
 }
 
@@ -1058,8 +1058,10 @@ void SkCanvas::internalSaveLayer(const SaveLayerRec& rec, SaveLayerStrategy stra
         const bool preserveLCDText = kOpaque_SkAlphaType == info.alphaType() ||
                                      (saveLayerFlags & kPreserveLCDText_SaveLayerFlag);
         const SkBaseDevice::TileUsage usage = SkBaseDevice::kNever_TileUsage;
+        const bool trackCoverage = SkToBool(saveLayerFlags & kMaskAgainstCoverage_EXPERIMENTAL_DONT_USE_SaveLayerFlag);
         const SkBaseDevice::CreateInfo createInfo = SkBaseDevice::CreateInfo(info, usage, geo,
                                                                              preserveLCDText,
+                                                                             trackCoverage,
                                                                              fAllocator.get());
         newDevice.reset(priorDevice->onCreateDevice(createInfo, paint));
         if (!newDevice) {