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// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "VkBuffer.hpp"
#include "VkConfig.hpp"
#include "VkDeviceMemory.hpp"
#include <cstring>
#include <limits>
namespace vk {
Buffer::Buffer(const VkBufferCreateInfo *pCreateInfo, void *mem)
: flags(pCreateInfo->flags)
, size(pCreateInfo->size)
, usage(pCreateInfo->usage)
, sharingMode(pCreateInfo->sharingMode)
{
if(pCreateInfo->sharingMode == VK_SHARING_MODE_CONCURRENT)
{
queueFamilyIndexCount = pCreateInfo->queueFamilyIndexCount;
queueFamilyIndices = reinterpret_cast<uint32_t *>(mem);
memcpy(queueFamilyIndices, pCreateInfo->pQueueFamilyIndices, sizeof(uint32_t) * queueFamilyIndexCount);
}
const auto *nextInfo = reinterpret_cast<const VkBaseInStructure *>(pCreateInfo->pNext);
for(; nextInfo != nullptr; nextInfo = nextInfo->pNext)
{
if(nextInfo->sType == VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO)
{
const auto *externalInfo = reinterpret_cast<const VkExternalMemoryBufferCreateInfo *>(nextInfo);
supportedExternalMemoryHandleTypes = externalInfo->handleTypes;
}
}
}
void Buffer::destroy(const VkAllocationCallbacks *pAllocator)
{
vk::freeHostMemory(queueFamilyIndices, pAllocator);
}
size_t Buffer::ComputeRequiredAllocationSize(const VkBufferCreateInfo *pCreateInfo)
{
return (pCreateInfo->sharingMode == VK_SHARING_MODE_CONCURRENT) ? sizeof(uint32_t) * pCreateInfo->queueFamilyIndexCount : 0;
}
const VkMemoryRequirements Buffer::getMemoryRequirements() const
{
VkMemoryRequirements memoryRequirements = {};
// Add 15 bytes of padding to ensure that any type of attribute within the
// buffer can be read using 16-bit accesses.
// TODO(b/196822081): Also reserve space for a header containing the size of the buffer (for robust buffer access)
memoryRequirements.size = this->size + 15;
if(memoryRequirements.size < this->size) // Overflow occurred
{
memoryRequirements.size = std::numeric_limits<VkDeviceSize>::max();
}
if(usage & (VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT | VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT))
{
memoryRequirements.alignment = vk::MIN_TEXEL_BUFFER_OFFSET_ALIGNMENT;
}
else if(usage & VK_BUFFER_USAGE_STORAGE_BUFFER_BIT)
{
memoryRequirements.alignment = vk::MIN_STORAGE_BUFFER_OFFSET_ALIGNMENT;
}
else if(usage & VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT)
{
memoryRequirements.alignment = vk::MIN_UNIFORM_BUFFER_OFFSET_ALIGNMENT;
}
else
{
memoryRequirements.alignment = REQUIRED_MEMORY_ALIGNMENT;
}
memoryRequirements.memoryTypeBits = vk::MEMORY_TYPE_GENERIC_BIT;
return memoryRequirements;
}
bool Buffer::canBindToMemory(DeviceMemory *pDeviceMemory) const
{
return pDeviceMemory->checkExternalMemoryHandleType(supportedExternalMemoryHandleTypes);
}
void Buffer::bind(DeviceMemory *pDeviceMemory, VkDeviceSize pMemoryOffset)
{
memory = pDeviceMemory->getOffsetPointer(pMemoryOffset);
}
void Buffer::copyFrom(const void *srcMemory, VkDeviceSize pSize, VkDeviceSize pOffset)
{
ASSERT((pSize + pOffset) <= size);
memcpy(getOffsetPointer(pOffset), srcMemory, pSize);
}
void Buffer::copyTo(void *dstMemory, VkDeviceSize pSize, VkDeviceSize pOffset) const
{
ASSERT((pSize + pOffset) <= size);
memcpy(dstMemory, getOffsetPointer(pOffset), pSize);
}
void Buffer::copyTo(Buffer *dstBuffer, const VkBufferCopy &pRegion) const
{
copyTo(dstBuffer->getOffsetPointer(pRegion.dstOffset), pRegion.size, pRegion.srcOffset);
}
void Buffer::fill(VkDeviceSize dstOffset, VkDeviceSize fillSize, uint32_t data)
{
size_t bytes = (fillSize == VK_WHOLE_SIZE) ? (size - dstOffset) : fillSize;
ASSERT((bytes + dstOffset) <= size);
uint32_t *memToWrite = static_cast<uint32_t *>(getOffsetPointer(dstOffset));
// Vulkan 1.1 spec: "If VK_WHOLE_SIZE is used and the remaining size of the buffer is
// not a multiple of 4, then the nearest smaller multiple is used."
for(; bytes >= 4; bytes -= 4, memToWrite++)
{
*memToWrite = data;
}
}
void Buffer::update(VkDeviceSize dstOffset, VkDeviceSize dataSize, const void *pData)
{
ASSERT((dataSize + dstOffset) <= size);
memcpy(getOffsetPointer(dstOffset), pData, dataSize);
}
void *Buffer::getOffsetPointer(VkDeviceSize offset) const
{
return reinterpret_cast<uint8_t *>(memory) + offset;
}
uint8_t *Buffer::end() const
{
return reinterpret_cast<uint8_t *>(getOffsetPointer(size + 1));
}
} // namespace vk