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Diffstat (limited to 'wgpu/src/buffer/static.rs')
-rw-r--r-- | wgpu/src/buffer/static.rs | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/wgpu/src/buffer/static.rs b/wgpu/src/buffer/static.rs deleted file mode 100644 index d8ae116e..00000000 --- a/wgpu/src/buffer/static.rs +++ /dev/null @@ -1,107 +0,0 @@ -use bytemuck::{Pod, Zeroable}; -use std::marker::PhantomData; -use std::mem; - -const DEFAULT_COUNT: wgpu::BufferAddress = 128; - -/// A generic buffer struct useful for items which have no alignment requirements -/// (e.g. Vertex, Index buffers) & no dynamic offsets. -#[derive(Debug)] -pub struct Buffer<T> { - //stored sequentially per mesh iteration; refers to the offset index in the GPU buffer - offsets: Vec<wgpu::BufferAddress>, - label: &'static str, - usages: wgpu::BufferUsages, - gpu: wgpu::Buffer, - size: wgpu::BufferAddress, - _data: PhantomData<T>, -} - -impl<T: Pod + Zeroable> Buffer<T> { - /// Initialize a new static buffer. - pub fn new( - device: &wgpu::Device, - label: &'static str, - usages: wgpu::BufferUsages, - ) -> Self { - let size = (mem::size_of::<T>() as u64) * DEFAULT_COUNT; - - Self { - offsets: Vec::new(), - label, - usages, - gpu: Self::gpu_buffer(device, label, size, usages), - size, - _data: PhantomData, - } - } - - fn gpu_buffer( - device: &wgpu::Device, - label: &'static str, - size: wgpu::BufferAddress, - usage: wgpu::BufferUsages, - ) -> wgpu::Buffer { - device.create_buffer(&wgpu::BufferDescriptor { - label: Some(label), - size, - usage, - mapped_at_creation: false, - }) - } - - /// Returns whether or not the buffer needs to be recreated. This can happen whenever mesh data - /// changes & a redraw is requested. - pub fn resize(&mut self, device: &wgpu::Device, new_count: usize) -> bool { - let size = (mem::size_of::<T>() * new_count) as u64; - - if self.size < size { - self.size = - (mem::size_of::<T>() * (new_count + new_count / 2)) as u64; - - self.gpu = - Self::gpu_buffer(device, self.label, self.size, self.usages); - - self.offsets.clear(); - true - } else { - false - } - } - - /// Writes the current vertex data to the gpu buffer with a memcpy & stores its offset. - /// - /// Returns the size of the written bytes. - pub fn write( - &mut self, - queue: &wgpu::Queue, - offset: u64, - content: &[T], - ) -> u64 { - let bytes = bytemuck::cast_slice(content); - let bytes_size = bytes.len() as u64; - - queue.write_buffer(&self.gpu, offset, bytes); - self.offsets.push(offset); - - bytes_size - } - - fn offset_at(&self, index: usize) -> &wgpu::BufferAddress { - self.offsets - .get(index) - .expect("Offset at index does not exist.") - } - - /// Returns the slice calculated from the offset stored at the given index. - /// e.g. to calculate the slice for the 2nd mesh in the layer, this would be the offset at index - /// 1 that we stored earlier when writing. - pub fn slice_from_index(&self, index: usize) -> wgpu::BufferSlice<'_> { - self.gpu.slice(self.offset_at(index)..) - } - - /// Clears any temporary data from the buffer. - pub fn clear(&mut self) { - self.offsets.clear() - } -} |