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Use staging buffer and move ssbo to device local memory

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This commit is contained in:
saschawillems 2016-03-19 14:03:10 +01:00
parent fcdc8f8973
commit 51e840416d
1 changed files with 41 additions and 13 deletions
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54
computeparticles/computeparticles.cpp
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@ -46,8 +46,6 @@ public:
VkPipeline compute;
} pipelines;
int vertexBufferSize;
VkQueue computeQueue;
VkCommandBuffer computeCmdBuffer;
VkPipelineLayout computePipelineLayout;
@ -299,24 +297,54 @@ public:
VkResult err;
void *data;
struct StagingBuffer {
VkDeviceMemory memory;
VkBuffer buffer;
} stagingBuffer;
// Allocate and fill host-visible staging storage buffer object
// Allocate and fill storage buffer object
VkBufferCreateInfo vBufferInfo =
vkTools::initializers::bufferCreateInfo(
VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
storageBufferSize);
err = vkCreateBuffer(device, &vBufferInfo, nullptr, &computeStorageBuffer.buffer);
assert(!err);
vkGetBufferMemoryRequirements(device, computeStorageBuffer.buffer, &memReqs);
vkTools::checkResult(vkCreateBuffer(device, &vBufferInfo, nullptr, &stagingBuffer.buffer));
vkGetBufferMemoryRequirements(device, stagingBuffer.buffer, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &memAlloc.memoryTypeIndex);
err = vkAllocateMemory(device, &memAlloc, nullptr, &computeStorageBuffer.memory);
assert(!err);
err = vkMapMemory(device, computeStorageBuffer.memory, 0, storageBufferSize, 0, &data);
assert(!err);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &stagingBuffer.memory));
vkTools::checkResult(vkMapMemory(device, stagingBuffer.memory, 0, storageBufferSize, 0, &data));
memcpy(data, particleBuffer.data(), storageBufferSize);
vkUnmapMemory(device, computeStorageBuffer.memory);
err = vkBindBufferMemory(device, computeStorageBuffer.buffer, computeStorageBuffer.memory, 0);
assert(!err);
vkUnmapMemory(device, stagingBuffer.memory);
vkTools::checkResult(vkBindBufferMemory(device, stagingBuffer.buffer, stagingBuffer.memory, 0));
// Allocate device local storage buffer ojbect
vBufferInfo.usage = VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
vkTools::checkResult(vkCreateBuffer(device, &vBufferInfo, nullptr, &computeStorageBuffer.buffer));
vkGetBufferMemoryRequirements(device, computeStorageBuffer.buffer, &memReqs);
memAlloc.allocationSize = memReqs.size;
getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, &memAlloc.memoryTypeIndex);
vkTools::checkResult(vkAllocateMemory(device, &memAlloc, nullptr, &computeStorageBuffer.memory));
vkTools::checkResult(vkBindBufferMemory(device, computeStorageBuffer.buffer, computeStorageBuffer.memory, 0));
// Copy from host to device
createSetupCommandBuffer();
VkBufferCopy copyRegion = {};
copyRegion.size = storageBufferSize;
vkCmdCopyBuffer(
setupCmdBuffer,
stagingBuffer.buffer,
computeStorageBuffer.buffer,
1,
&copyRegion);
flushSetupCommandBuffer();
// Destroy staging buffer
vkDestroyBuffer(device, stagingBuffer.buffer, nullptr);
vkFreeMemory(device, stagingBuffer.memory, nullptr);
computeStorageBuffer.descriptor.buffer = computeStorageBuffer.buffer;
computeStorageBuffer.descriptor.offset = 0;