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Fix read mapping size (size is number of bytes, not number of items)

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This commit is contained in:
Alexey Zatelepin 2020-07-02 21:17:27 +03:00
parent 368721e317
commit 9667c34e7e
1 changed files with 6 additions and 6 deletions
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12
piet-gpu-hal/src/vulkan.rs
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@ -744,18 +744,18 @@ impl crate::Device for VkDevice {
result: &mut Vec<T>,
) -> Result<(), Error> {
let device = &self.device.device;
let size = buffer.size as usize / std::mem::size_of::<T>();
let buf = device.map_memory(
buffer.buffer_memory,
0,
size as u64,
buffer.size,
vk::MemoryMapFlags::empty(),
)?;
if size > result.len() {
result.reserve(size - result.len());
let len = buffer.size as usize / std::mem::size_of::<T>();
if len > result.len() {
result.reserve(len - result.len());
}
std::ptr::copy_nonoverlapping(buf as *const T, result.as_mut_ptr(), size);
result.set_len(size);
std::ptr::copy_nonoverlapping(buf as *const T, result.as_mut_ptr(), len);
result.set_len(len);
device.unmap_memory(buffer.buffer_memory);
Ok(())
}