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#include "xe_buffer.hpp"
#include <cassert>
#include <cstring>
namespace xe {
VkDeviceSize XeBuffer::getAlignment(VkDeviceSize instanceSize, VkDeviceSize minOffsetAlignment) {
if (minOffsetAlignment > 0) {
return (instanceSize + minOffsetAlignment - 1) & ~(minOffsetAlignment - 1);
}
return instanceSize;
}
XeBuffer::XeBuffer(
XeDevice &device,
VkDeviceSize instanceSize,
uint32_t instanceCount,
VkBufferUsageFlags usageFlags,
VkMemoryPropertyFlags memoryPropertyFlags,
VkDeviceSize minOffsetAlignment)
: xeDevice{device},
instanceSize{instanceSize},
instanceCount{instanceCount},
usageFlags{usageFlags},
memoryPropertyFlags{memoryPropertyFlags} {
alignmentSize = getAlignment(instanceSize, minOffsetAlignment);
bufferSize = alignmentSize * instanceCount;
device.createBuffer(bufferSize, usageFlags, memoryPropertyFlags, buffer, memory);
}
XeBuffer::~XeBuffer() {
unmap();
vkDestroyBuffer(xeDevice.device(), buffer, nullptr);
vkFreeMemory(xeDevice.device(), memory, nullptr);
}
VkResult XeBuffer::map(VkDeviceSize size, VkDeviceSize offset) {
assert(buffer && memory && "Called map on buffer before create");
return vkMapMemory(xeDevice.device(), memory, offset, size, 0, &mapped);
}
void XeBuffer::unmap() {
if (mapped) {
vkUnmapMemory(xeDevice.device(), memory);
mapped = nullptr;
}
}
void XeBuffer::writeToBuffer(void *data, VkDeviceSize size, VkDeviceSize offset) {
assert(mapped && "Cannot copy to unmapped buffer");
if (size == VK_WHOLE_SIZE) {
memcpy(mapped, data, bufferSize);
} else {
char *memOffset = (char *)mapped;
memOffset += offset;
memcpy(memOffset, data, size);
}
}
VkResult XeBuffer::flush(VkDeviceSize size, VkDeviceSize offset) {
VkMappedMemoryRange mappedRange = {};
mappedRange.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
mappedRange.memory = memory;
mappedRange.offset = offset;
mappedRange.size = size;
return vkFlushMappedMemoryRanges(xeDevice.device(), 1, &mappedRange);
}
VkResult XeBuffer::invalidate(VkDeviceSize size, VkDeviceSize offset) {
VkMappedMemoryRange mappedRange = {};
mappedRange.sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
mappedRange.memory = memory;
mappedRange.offset = offset;
mappedRange.size = size;
return vkInvalidateMappedMemoryRanges(xeDevice.device(), 1, &mappedRange);
}
VkDescriptorBufferInfo XeBuffer::descriptorInfo(VkDeviceSize size, VkDeviceSize offset) {
return VkDescriptorBufferInfo{
buffer,
offset,
size,
};
}
void XeBuffer::writeToIndex(void *data, int index) {
writeToBuffer(data, instanceSize, index * alignmentSize);
}
VkResult XeBuffer::flushIndex(int index) { return flush(alignmentSize, index * alignmentSize); }
VkDescriptorBufferInfo XeBuffer::descriptorInfoForIndex(int index) {
return descriptorInfo(alignmentSize, index * alignmentSize);
}
VkResult XeBuffer::invalidateIndex(int index) {
return invalidate(alignmentSize, index * alignmentSize);
}
}
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