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