1 files changed, 91 insertions, 0 deletions
diff --git a/src/deps/skia/include/gpu/GrBackendSurfaceMutableState.h b/src/deps/skia/include/gpu/GrBackendSurfaceMutableState.h
new file mode 100644
index 000000000..3a5f1d7fa
--- /dev/null
+++ b/src/deps/skia/include/gpu/GrBackendSurfaceMutableState.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrBackendSurfaceMutableState_DEFINED
+#define GrBackendSurfaceMutableState_DEFINED
+
+#include "include/gpu/GrTypes.h"
+
+#ifdef SK_VULKAN
+#include "include/private/GrVkTypesPriv.h"
+#endif
+
+/**
+ * Since Skia and clients can both modify gpu textures and their connected state, Skia needs a way
+ * for clients to inform us if they have modifiend any of this state. In order to not need setters
+ * for every single API and state, we use this class to be a generic wrapper around all the mutable
+ * state. This class is used for calls that inform Skia of these texture/image state changes by the
+ * client as well as for requesting state changes to be done by Skia. The backend specific state
+ * that is wrapped by this class are:
+ *
+ * Vulkan: VkImageLayout and QueueFamilyIndex
+ */
+class SK_API GrBackendSurfaceMutableState {
+public:
+    GrBackendSurfaceMutableState() {}
+
+#ifdef SK_VULKAN
+    GrBackendSurfaceMutableState(VkImageLayout layout, uint32_t queueFamilyIndex)
+            : fVkState(layout, queueFamilyIndex)
+            , fBackend(GrBackend::kVulkan)
+            , fIsValid(true) {}
+#endif
+
+    GrBackendSurfaceMutableState(const GrBackendSurfaceMutableState& that);
+    GrBackendSurfaceMutableState& operator=(const GrBackendSurfaceMutableState& that);
+
+#ifdef SK_VULKAN
+    // If this class is not Vulkan backed it will return value of VK_IMAGE_LAYOUT_UNDEFINED.
+    // Otherwise it will return the VkImageLayout.
+    VkImageLayout getVkImageLayout() const {
+        if (this->isValid() && fBackend != GrBackendApi::kVulkan) {
+            return VK_IMAGE_LAYOUT_UNDEFINED;
+        }
+        return fVkState.getImageLayout();
+    }
+
+    // If this class is not Vulkan backed it will return value of VK_QUEUE_FAMILY_IGNORED.
+    // Otherwise it will return the VkImageLayout.
+    uint32_t getQueueFamilyIndex() const {
+        if (this->isValid() && fBackend != GrBackendApi::kVulkan) {
+            return VK_QUEUE_FAMILY_IGNORED;
+        }
+        return fVkState.getQueueFamilyIndex();
+    }
+#endif
+
+    // Returns true if the backend mutable state has been initialized.
+    bool isValid() const { return fIsValid; }
+
+    GrBackendApi backend() const { return fBackend; }
+
+private:
+    friend class GrBackendSurfaceMutableStateImpl;
+    friend class GrVkGpu;
+
+#ifdef SK_VULKAN
+    void setVulkanState(VkImageLayout layout, uint32_t queueFamilyIndex) {
+        SkASSERT(!this->isValid() || fBackend == GrBackendApi::kVulkan);
+        fVkState.setImageLayout(layout);
+        fVkState.setQueueFamilyIndex(queueFamilyIndex);
+        fBackend = GrBackendApi::kVulkan;
+        fIsValid = true;
+    }
+#endif
+
+    union {
+        char fPlaceholder;
+#ifdef SK_VULKAN
+        GrVkSharedImageInfo fVkState;
+#endif
+    };
+
+    GrBackend fBackend = GrBackendApi::kMock;
+    bool fIsValid = false;
+};
+
+#endif