From 2097a56b58d8fe1784a625f69c1cdd38fcfb9a52 Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Thu, 9 Feb 2023 06:54:51 +0100
Subject: Provide some margin to static buffers when growing

---
 wgpu/src/buffer/static.rs | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'wgpu/src/buffer/static.rs')

diff --git a/wgpu/src/buffer/static.rs b/wgpu/src/buffer/static.rs
index 7ae7edd2..d8ae116e 100644
--- a/wgpu/src/buffer/static.rs
+++ b/wgpu/src/buffer/static.rs
@@ -2,8 +2,7 @@ use bytemuck::{Pod, Zeroable};
 use std::marker::PhantomData;
 use std::mem;
 
-//128 triangles/indices
-const DEFAULT_STATIC_BUFFER_COUNT: wgpu::BufferAddress = 1_000;
+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.
@@ -25,7 +24,7 @@ impl<T: Pod + Zeroable> Buffer<T> {
         label: &'static str,
         usages: wgpu::BufferUsages,
     ) -> Self {
-        let size = (mem::size_of::<T>() as u64) * DEFAULT_STATIC_BUFFER_COUNT;
+        let size = (mem::size_of::<T>() as u64) * DEFAULT_COUNT;
 
         Self {
             offsets: Vec::new(),
@@ -57,9 +56,13 @@ impl<T: Pod + Zeroable> Buffer<T> {
         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();
-            self.size = size;
-            self.gpu = Self::gpu_buffer(device, self.label, size, self.usages);
             true
         } else {
             false
-- 
cgit