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remove unneeded uniform data copy

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This commit is contained in:
Carter Anderson 2020-01-27 19:35:54 -08:00
parent 0b49557237
commit 4675996e4f
1 changed files with 5 additions and 7 deletions
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12
src/render/render_graph_2/wgpu_renderer.rs
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@ -353,14 +353,12 @@ impl WgpuRenderer {
for (name, info) in dynamic_uniform_info.iter_mut() {
let size = wgpu::BIND_BUFFER_ALIGNMENT * info.count;
let mapped = self.device.create_buffer_mapped(size as usize, wgpu::BufferUsage::COPY_SRC);
for ((entity, shader_uniforms), slot) in <Read<ShaderUniforms>>::query().iter_entities(world).zip(mapped.data.chunks_exact_mut(wgpu::BIND_BUFFER_ALIGNMENT as usize)) {
let alignment = wgpu::BIND_BUFFER_ALIGNMENT as usize;
let mut offset = 0usize;
for (entity, shader_uniforms) in <Read<ShaderUniforms>>::query().iter_entities(world) {
if let Some(bytes) = shader_uniforms.get_uniform_bytes(world, entity, name) {
// TODO: make this zero-copy somehow
let mut new_bytes = bytes.clone();
while new_bytes.len() < (wgpu::BIND_BUFFER_ALIGNMENT as usize) {
new_bytes.push(0);
}
slot.copy_from_slice(new_bytes.as_slice());
mapped.data[offset..(offset + bytes.len())].copy_from_slice(bytes.as_slice());
offset += alignment;
}
}