66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
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/*
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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 GrBackendSurfaceMutableState {
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public:
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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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#endif
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GrBackendSurfaceMutableState& operator=(const GrBackendSurfaceMutableState& that) {
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switch (fBackend) {
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case GrBackend::kVulkan:
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#ifdef SK_VULKAN
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SkASSERT(that.fBackend == GrBackend::kVulkan);
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fVkState = that.fVkState;
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#endif
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break;
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default:
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(void)that;
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SkUNREACHABLE;
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}
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fBackend = that.fBackend;
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return *this;
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}
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private:
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friend class GrBackendSurfaceMutableStateImpl;
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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;
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};
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#endif
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