26c0e4c1f5
Bug: skia: Change-Id: I1e122e1b11ab308c2f83cb98c36c81511f4507d0 Reviewed-on: https://skia-review.googlesource.com/129980 Commit-Queue: Greg Daniel <egdaniel@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com> Reviewed-by: Jim Van Verth <jvanverth@google.com>
90 lines
4.2 KiB
C++
90 lines
4.2 KiB
C++
/*
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* Copyright 2018 Google Inc.
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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 GrVkMemoryAllocator_DEFINED
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#define GrVkMemoryAllocator_DEFINED
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#include "SkRefCnt.h"
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#include "GrTypes.h"
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#include "GrVkDefines.h"
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#include "GrVkTypes.h"
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class GrVkMemoryAllocator : public SkRefCnt {
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public:
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enum class AllocationPropertyFlags {
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kNone = 0,
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// Allocation will be placed in its own VkDeviceMemory and not suballocated from some larger
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// block.
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kDedicatedAllocation = 0x1,
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// Says that the backing memory can only be accessed by the device. Additionally the device
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// may lazily allocate the memory. This cannot be used with buffers that will be host
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// visible. Setting this flag does not guarantee that we will allocate memory that respects
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// it, but we will try to prefer memory that can respect it.
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kLazyAllocation = 0x2,
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// The allocation will be mapped immediately and stay mapped until it is destroyed. This
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// flag is only valid for buffers which are host visible (i.e. must have a usage other than
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// BufferUsage::kGpuOnly).
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kPersistentlyMapped = 0x3,
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};
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GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(AllocationPropertyFlags);
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enum class BufferUsage {
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// Buffers that will only be accessed from the device (large const buffers). Will always be
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// in device local memory.
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kGpuOnly,
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// Buffers that will be accessed on the host and copied to and from a GPU resource (transfer
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// buffers). Will always be mappable and coherent memory.
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kCpuOnly,
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// Buffers that typically will be updated multiple times by the host and read on the gpu
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// (e.g. uniform or vertex buffers). Will always be mappable memory, and will prefer to be
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// in device local memory.
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kCpuWritesGpuReads,
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// Buffers which are typically writted to by the GPU and then read on the host. Will always
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// be mappable memory, and will prefer coherent and cached memory.
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kGpuWritesCpuReads,
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};
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virtual bool allocateMemoryForImage(VkImage image, AllocationPropertyFlags flags,
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GrVkBackendMemory*) = 0;
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virtual bool allocateMemoryForBuffer(VkBuffer buffer, BufferUsage usage,
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AllocationPropertyFlags flags, GrVkBackendMemory*) = 0;
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// Fills out the passed in GrVkAlloc struct for the passed in GrVkBackendMemory.
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virtual void getAllocInfo(const GrVkBackendMemory&, GrVkAlloc*) const = 0;
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// Maps the entire allocation and returns a pointer to the start of the allocation. The
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// implementation may map more memory than just the allocation, but the returned pointer must
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// point at the start of the memory for the requested allocation.
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virtual void* mapMemory(const GrVkBackendMemory&) = 0;
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virtual void unmapMemory(const GrVkBackendMemory&) = 0;
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// The following two calls are used for managing non-coherent memory. The offset is relative to
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// the start of the allocation and not the underlying VkDeviceMemory. Additionaly the client
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// must make sure that the offset + size passed in is less that or equal to the allocation size.
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// It is the responsibility of the implementation to make sure all alignment requirements are
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// followed. The client should not have to deal with any sort of alignment issues.
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virtual void flushMappedMemory(const GrVkBackendMemory&, VkDeviceSize offset,
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VkDeviceSize size) = 0;
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virtual void invalidateMappedMemory(const GrVkBackendMemory&, VkDeviceSize offset,
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VkDeviceSize size)= 0;
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virtual void freeMemory(const GrVkBackendMemory&) = 0;
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// Returns the total amount of memory that is allocated and in use by an allocation for this
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// allocator.
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virtual uint64_t totalUsedMemory() const = 0;
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// Returns the total amount of memory that is allocated by this allocator.
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virtual uint64_t totalAllocatedMemory() const = 0;
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};
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GR_MAKE_BITFIELD_CLASS_OPS(GrVkMemoryAllocator::AllocationPropertyFlags);
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#endif
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