Vulkan:缓冲区复制过程中丢失的设备
Vulkan:缓冲区复制过程中丢失的设备
提问于 2018-07-24 02:41:49
我很难提交一个缓冲区副本命令，在某种程度上对我来说没有任何意义。当我试图从暂存缓冲区复制到设备本地缓冲区时，我会从验证层得到一个“设备丢失”错误。真正令人困惑的是，只有当我以特定的方式调用复制函数时，它才会发生。
下面是代码：
Buffer.cpp
#include "Buffer.h"
namespace vkr
{
Buffer::Buffer() : buffer(VK_NULL_HANDLE), size(0) {}
Buffer::Buffer(
const VmaAllocator & _allocator,
const vk::DeviceSize bufferSize,
const vk::BufferUsageFlags usage,
const VmaMemoryUsage memoryUsageFlags
) :
size(bufferSize)
{
vk::BufferCreateInfo bufferInfo = {};
bufferInfo.size = size;
bufferInfo.usage = usage;
bufferInfo.sharingMode = vk::SharingMode::eExclusive;
VmaAllocationCreateInfo allocInfo = {};
allocInfo.usage = memoryUsageFlags;
auto vanillaBufferInfo = (VkBufferCreateInfo)bufferInfo;
vmaCreateBuffer(_allocator, &vanillaBufferInfo, &allocInfo, &buffer, &allocation, nullptr);
}
Buffer::Buffer(Buffer && otherBuffer)
{
buffer = otherBuffer.buffer;
allocation = otherBuffer.allocation;
size = otherBuffer.size;
otherBuffer.buffer = VK_NULL_HANDLE;
otherBuffer.allocation = VmaAllocation();
otherBuffer.size = 0;
}
Buffer & Buffer::operator=(Buffer && otherBuffer)
{
if (this != &otherBuffer) {
buffer = otherBuffer.buffer;
allocation = otherBuffer.allocation;
size = otherBuffer.size;
otherBuffer.buffer = VK_NULL_HANDLE;
otherBuffer.allocation = VmaAllocation();
otherBuffer.size = 0;
}
return *this;
}
Buffer::operator vk::Buffer() const
{
return vk::Buffer(buffer);
}
Buffer::operator VkBuffer() const
{
return buffer;
}
void Buffer::copyInto(const VmaAllocator & _allocator, const void* dataSrc)
{
void* mappedData;
vmaMapMemory(_allocator, allocation, &mappedData);
memcpy(mappedData, dataSrc, (size_t)size);
vmaUnmapMemory(_allocator, allocation);
}
void Buffer::copyInto(const VmaAllocator & _allocator, const void* dataSrc, const size_t newSize)
{
void* mappedData;
vmaMapMemory(_allocator, allocation, &mappedData);
memcpy(mappedData, dataSrc, newSize);
vmaUnmapMemory(_allocator, allocation);
}
void Buffer::destroy(const VmaAllocator & _allocator)
{
vmaDestroyBuffer(_allocator, buffer, allocation);
}
}分阶段缓冲：
#include "StagedBufferFactory.h"
namespace vkr
{
namespace StagedBufferFactory
{
vkr::Buffer create(
vk::Device & device,
vk::CommandPool & commandPool,
vk::Queue & graphicsQueue,
const vk::BufferUsageFlags usageFlags,
const vk::DeviceSize size,
const void * dataSrc,
const VmaAllocator & _allocator
)
{
// Staging buffer that we load the data onto that's visible to our CPU
vk::BufferUsageFlags stagingUsageFlags = vk::BufferUsageFlagBits::eTransferSrc;
vkr::Buffer stagingBuffer{ _allocator, size, stagingUsageFlags, VMA_MEMORY_USAGE_CPU_ONLY };
stagingBuffer.copyInto(_allocator, &dataSrc, (size_t)size);
// This is our buffer located on our GPU, inaccessible to our CPU
vk::BufferUsageFlags gpuBufferUsageFlags = vk::BufferUsageFlagBits::eTransferDst | usageFlags;
vkr::Buffer gpuBuffer{ _allocator, size, gpuBufferUsageFlags, VMA_MEMORY_USAGE_GPU_ONLY };
copyBuffer(device, commandPool, graphicsQueue, stagingBuffer, gpuBuffer);
stagingBuffer.destroy(_allocator);
return gpuBuffer;
}
void copyBuffer(
vk::Device & device,
vk::CommandPool & commandPool,
vk::Queue & graphicsQueue,
vkr::Buffer & stagingBuffer,
vkr::Buffer & gpuBuffer
)
{
vk::CommandBufferAllocateInfo allocInfo = {};
allocInfo.level = vk::CommandBufferLevel::ePrimary;
allocInfo.commandPool = commandPool;
allocInfo.commandBufferCount = 1;
vk::CommandBuffer commandBuffer;
device.allocateCommandBuffers(&allocInfo, &commandBuffer);
vk::CommandBufferBeginInfo beginInfo = {};
beginInfo.flags = vk::CommandBufferUsageFlagBits::eOneTimeSubmit;
commandBuffer.begin(&beginInfo);
vk::BufferCopy copyRegion = {};
copyRegion.srcOffset = 0;
copyRegion.dstOffset = 0;
copyRegion.size = stagingBuffer.size;
commandBuffer.copyBuffer(stagingBuffer.buffer, gpuBuffer.buffer, 1, ©Region);
commandBuffer.end();
vk::SubmitInfo submitInfo = {};
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = &commandBuffer;
// Create fence to ensure that the command buffer has finished executing
vk::FenceCreateInfo fenceInfo{};
vk::Fence fence = device.createFence(fenceInfo);
// Submit to the queue
graphicsQueue.submit(1, &submitInfo, fence);
graphicsQueue.waitIdle();
//device.waitForFences({ fence }, true, 100000000000);
device.destroyFence(fence);
device.free(commandPool, 1, &commandBuffer);
}
}
}缓冲区创建：
void HelloTriangleApplication::createIndexBuffer()
{
vk::DeviceSize bufferSize = sizeof(indices[0]) * indices.size();
//// Staging buffer that we load the data onto that's visible to our CPU
vk::BufferUsageFlags stagingUsageFlags = vk::BufferUsageFlagBits::eTransferSrc;
vkr::Buffer stagingBuffer{ vulkanAllocator, bufferSize, stagingUsageFlags, VMA_MEMORY_USAGE_CPU_ONLY };
stagingBuffer.copyInto(vulkanAllocator, indices.data());
//// This is our buffer located on our GPU, inaccessible to our CPU
vk::BufferUsageFlags indexUsageFlags = vk::BufferUsageFlagBits::eTransferDst | vk::BufferUsageFlagBits::eIndexBuffer;
indexBuffer = vkr::Buffer{ vulkanAllocator, bufferSize, indexUsageFlags, VMA_MEMORY_USAGE_GPU_ONLY };
vkr::StagedBufferFactory::copyBuffer(device, commandPool, graphicsQueue, stagingBuffer, indexBuffer);
stagingBuffer.destroy(vulkanAllocator);
}所以这个代码没有问题..。但是，如果我尝试使用我的vkr::StagedBuffer::create函数(据我所知，它调用了这个确切的代码)，程序就无法工作。我得到一个黑色屏幕(而不是彩虹色的矩形)，有时验证层告诉我“设备丢失了”。
void HelloTriangleApplication::createIndexBuffer()
{
vk::DeviceSize bufferSize = sizeof(indices[0]) * indices.size();
indexBuffer = vkr::StagedBufferFactory::create(device, commandPool, graphicsQueue, vk::BufferUsageFlagBits::eIndexBuffer, bufferSize, indices.data(), vulkanAllocator);
}我要把头发扯掉，我完全不明白为什么会这样。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-07-25 01:49:32
正如弗兰克所指出的，这一切都是由于上面发布的我的vkr::StagedBufferFactory::create代码中的语法错误造成的。我不小心拿了一个dataSrc指针中传递的指针，导致我试图用垃圾填充我的VkBuffer。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51489702
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