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Improve sample code for advanced data uploading in docs

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Johannes Schneider 2024-07-08 23:32:49 +02:00
parent 257138b8f5
commit a2e25c6f14
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1 changed files with 50 additions and 7 deletions
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57
include/vk_mem_alloc.h
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@ -18195,7 +18195,8 @@ allocCreateInfo.flags = VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT |
VkBuffer buf;
VmaAllocation alloc;
VmaAllocationInfo allocInfo;
vmaCreateBuffer(allocator, &bufCreateInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
VkResult result = vmaCreateBuffer(allocator, &bufCreateInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
// Check result...
VkMemoryPropertyFlags memPropFlags;
vmaGetAllocationMemoryProperties(allocator, alloc, &memPropFlags);
@ -18206,10 +18207,24 @@ if(memPropFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT)
// [Executed in runtime]:
memcpy(allocInfo.pMappedData, myData, myDataSize);
result = vmaFlushAllocation(allocator, alloc, 0, VK_WHOLE_SIZE);
// Check result...
VkBufferMemoryBarrier bufMemBarrier = { VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER };
bufMemBarrier.srcAccessMask = VK_ACCESS_HOST_WRITE_BIT;
bufMemBarrier.dstAccessMask = VK_ACCESS_UNIFORM_READ_BIT;
bufMemBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier.buffer = buf;
bufMemBarrier.offset = 0;
bufMemBarrier.size = VK_WHOLE_SIZE;
vkCmdPipelineBarrier(cmdBuf, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT,
0, 0, nullptr, 1, &bufMemBarrier, 0, nullptr);
}
else
{
// Allocation ended up in a non-mappable memory - need to transfer.
// Allocation ended up in a non-mappable memory - a transfer using a staging buffer is required.
VkBufferCreateInfo stagingBufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
stagingBufCreateInfo.size = 65536;
stagingBufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
@ -18222,18 +18237,46 @@ else
VkBuffer stagingBuf;
VmaAllocation stagingAlloc;
VmaAllocationInfo stagingAllocInfo;
vmaCreateBuffer(allocator, &stagingBufCreateInfo, &stagingAllocCreateInfo,
&stagingBuf, &stagingAlloc, stagingAllocInfo);
result = vmaCreateBuffer(allocator, &stagingBufCreateInfo, &stagingAllocCreateInfo,
&stagingBuf, &stagingAlloc, &stagingAllocInfo);
// Check result...
// [Executed in runtime]:
memcpy(stagingAllocInfo.pMappedData, myData, myDataSize);
vmaFlushAllocation(allocator, stagingAlloc, 0, VK_WHOLE_SIZE);
//vkCmdPipelineBarrier: VK_ACCESS_HOST_WRITE_BIT --> VK_ACCESS_TRANSFER_READ_BIT
result = vmaFlushAllocation(allocator, stagingAlloc, 0, VK_WHOLE_SIZE);
// Check result...
VkBufferMemoryBarrier bufMemBarrier = { VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER };
bufMemBarrier.srcAccessMask = VK_ACCESS_HOST_WRITE_BIT;
bufMemBarrier.dstAccessMask = VK_ACCESS_TRANSFER_READ_BIT;
bufMemBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier.buffer = stagingBuf;
bufMemBarrier.offset = 0;
bufMemBarrier.size = VK_WHOLE_SIZE;
vkCmdPipelineBarrier(cmdBuf, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_TRANSFER_BIT,
0, 0, nullptr, 1, &bufMemBarrier, 0, nullptr);
VkBufferCopy bufCopy = {
0, // srcOffset
0, // dstOffset,
myDataSize); // size
myDataSize, // size
};
vkCmdCopyBuffer(cmdBuf, stagingBuf, buf, 1, &bufCopy);
VkBufferMemoryBarrier bufMemBarrier2 = { VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER };
bufMemBarrier2.srcAccessMask = VK_ACCESS_TRANSFER_WRITE_BIT;
bufMemBarrier2.dstAccessMask = VK_ACCESS_UNIFORM_READ_BIT; // We created a uniform buffer
bufMemBarrier2.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier2.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
bufMemBarrier2.buffer = buf;
bufMemBarrier2.offset = 0;
bufMemBarrier2.size = VK_WHOLE_SIZE;
vkCmdPipelineBarrier(cmdBuf, VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT,
0, 0, nullptr, 1, &bufMemBarrier2, 0, nullptr);
}
\endcode