1 files changed, 55 insertions, 0 deletions
diff --git a/src/deps/skia/include/private/GrImageContext.h b/src/deps/skia/include/private/GrImageContext.h
new file mode 100644
index 000000000..8a9f558f3
--- /dev/null
+++ b/src/deps/skia/include/private/GrImageContext.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrImageContext_DEFINED
+#define GrImageContext_DEFINED
+
+#include "include/private/GrContext_Base.h"
+#include "include/private/GrSingleOwner.h"
+
+class GrImageContextPriv;
+
+// This is now just a view on a ThreadSafeProxy, that SkImages can attempt to
+// downcast to a GrDirectContext as a backdoor to some operations. Once we remove the backdoors,
+// this goes away and SkImages just hold ThreadSafeProxies.
+class GrImageContext : public GrContext_Base {
+public:
+    ~GrImageContext() override;
+
+    // Provides access to functions that aren't part of the public API.
+    GrImageContextPriv priv();
+    const GrImageContextPriv priv() const;  // NOLINT(readability-const-return-type)
+
+protected:
+    friend class GrImageContextPriv; // for hidden functions
+
+    GrImageContext(sk_sp<GrContextThreadSafeProxy>);
+
+    SK_API virtual void abandonContext();
+    SK_API virtual bool abandoned();
+
+    /** This is only useful for debug purposes */
+    GrSingleOwner* singleOwner() const { return &fSingleOwner; }
+
+    GrImageContext* asImageContext() override { return this; }
+
+private:
+    // When making promise images, we currently need a placeholder GrImageContext instance to give
+    // to the SkImage that has no real power, just a wrapper around the ThreadSafeProxy.
+    // TODO: De-power SkImage to ThreadSafeProxy or at least figure out a way to share one instance.
+    static sk_sp<GrImageContext> MakeForPromiseImage(sk_sp<GrContextThreadSafeProxy>);
+
+    // In debug builds we guard against improper thread handling
+    // This guard is passed to the GrDrawingManager and, from there to all the
+    // GrSurfaceDrawContexts.  It is also passed to the GrResourceProvider and SkGpuDevice.
+    // TODO: Move this down to GrRecordingContext.
+    mutable GrSingleOwner            fSingleOwner;
+
+    using INHERITED = GrContext_Base;
+};
+
+#endif