1 files changed, 140 insertions, 0 deletions
diff --git a/src/deps/skia/include/gpu/GrBackendSemaphore.h b/src/deps/skia/include/gpu/GrBackendSemaphore.h
new file mode 100644
index 000000000..83d70adf0
--- /dev/null
+++ b/src/deps/skia/include/gpu/GrBackendSemaphore.h
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrBackendSemaphore_DEFINED
+#define GrBackendSemaphore_DEFINED
+
+#include "include/gpu/GrTypes.h"
+
+#include "include/gpu/gl/GrGLTypes.h"
+
+#ifdef SK_METAL
+#include "include/gpu/mtl/GrMtlTypes.h"
+#endif
+
+#ifdef SK_VULKAN
+#include "include/gpu/vk/GrVkTypes.h"
+#endif
+
+#ifdef SK_DIRECT3D
+#include "include/private/GrD3DTypesMinimal.h"
+#endif
+
+/**
+ * Wrapper class for passing into and receiving data from Ganesh about a backend semaphore object.
+ */
+class GrBackendSemaphore {
+public:
+    // For convenience we just set the backend here to OpenGL. The GrBackendSemaphore cannot be used
+    // until either init* is called, which will set the appropriate GrBackend.
+    GrBackendSemaphore()
+            : fBackend(GrBackendApi::kOpenGL), fGLSync(nullptr), fIsInitialized(false) {}
+
+#ifdef SK_DIRECT3D
+    // We only need to specify these if Direct3D is enabled, because it requires special copy
+    // characteristics.
+    ~GrBackendSemaphore();
+    GrBackendSemaphore(const GrBackendSemaphore&);
+    GrBackendSemaphore& operator=(const GrBackendSemaphore&);
+#endif
+
+    void initGL(GrGLsync sync) {
+        fBackend = GrBackendApi::kOpenGL;
+        fGLSync = sync;
+        fIsInitialized = true;
+    }
+
+#ifdef SK_VULKAN
+    void initVulkan(VkSemaphore semaphore) {
+        fBackend = GrBackendApi::kVulkan;
+        fVkSemaphore = semaphore;
+
+        fIsInitialized = true;
+    }
+
+    VkSemaphore vkSemaphore() const {
+        if (!fIsInitialized || GrBackendApi::kVulkan != fBackend) {
+            return VK_NULL_HANDLE;
+        }
+        return fVkSemaphore;
+    }
+#endif
+
+#ifdef SK_METAL
+    // It is the creator's responsibility to ref the MTLEvent passed in here, via __bridge_retained.
+    // The other end will wrap this BackendSemaphore and take the ref, via __bridge_transfer.
+    void initMetal(GrMTLHandle event, uint64_t value) {
+        fBackend = GrBackendApi::kMetal;
+        fMtlEvent = event;
+        fMtlValue = value;
+
+        fIsInitialized = true;
+    }
+
+    GrMTLHandle mtlSemaphore() const {
+        if (!fIsInitialized || GrBackendApi::kMetal != fBackend) {
+            return nullptr;
+        }
+        return fMtlEvent;
+    }
+
+    uint64_t mtlValue() const {
+        if (!fIsInitialized || GrBackendApi::kMetal != fBackend) {
+            return 0;
+        }
+        return fMtlValue;
+    }
+
+#endif
+
+#ifdef SK_DIRECT3D
+    void initDirect3D(const GrD3DFenceInfo& info) {
+        fBackend = GrBackendApi::kDirect3D;
+        this->assignD3DFenceInfo(info);
+        fIsInitialized = true;
+    }
+#endif
+
+    bool isInitialized() const { return fIsInitialized; }
+
+    GrGLsync glSync() const {
+        if (!fIsInitialized || GrBackendApi::kOpenGL != fBackend) {
+            return nullptr;
+        }
+        return fGLSync;
+    }
+
+
+#ifdef SK_DIRECT3D
+    bool getD3DFenceInfo(GrD3DFenceInfo* outInfo) const;
+#endif
+
+private:
+#ifdef SK_DIRECT3D
+    void assignD3DFenceInfo(const GrD3DFenceInfo& info);
+#endif
+
+    GrBackendApi fBackend;
+    union {
+        GrGLsync    fGLSync;
+#ifdef SK_VULKAN
+        VkSemaphore fVkSemaphore;
+#endif
+#ifdef SK_METAL
+        GrMTLHandle fMtlEvent;    // Expected to be an id<MTLEvent>
+#endif
+#ifdef SK_DIRECT3D
+        GrD3DFenceInfo* fD3DFenceInfo;
+#endif
+    };
+#ifdef SK_METAL
+    uint64_t fMtlValue;
+#endif
+    bool fIsInitialized;
+};
+
+#endif