1 files changed, 43 insertions, 0 deletions
diff --git a/stockton-render/src/buffers/draw_buffers.rs b/stockton-render/src/buffers/draw_buffers.rs
new file mode 100644
index 0000000..5baec92
--- /dev/null
+++ b/stockton-render/src/buffers/draw_buffers.rs
@@ -0,0 +1,43 @@
+//! A vertex and index buffer set for drawing
+
+use super::StagedBuffer;
+use crate::types::*;
+
+use anyhow::{Context, Result};
+use hal::buffer::Usage;
+use std::mem::ManuallyDrop;
+
+/// Initial size of vertex buffer. TODO: Way of overriding this
+pub const INITIAL_VERT_SIZE: u64 = 3 * 3000;
+
+/// Initial size of index buffer. TODO: Way of overriding this
+pub const INITIAL_INDEX_SIZE: u64 = 3000;
+
+/// The buffers used for drawing, ie index and vertex buffer
+pub struct DrawBuffers<'a, T: Sized> {
+    pub vertex_buffer: ManuallyDrop<StagedBuffer<'a, T>>,
+    pub index_buffer: ManuallyDrop<StagedBuffer<'a, (u16, u16, u16)>>,
+}
+
+impl<'a, T> DrawBuffers<'a, T> {
+    pub fn new(device: &mut DeviceT, adapter: &Adapter) -> Result<DrawBuffers<'a, T>> {
+        let vert = StagedBuffer::new(device, adapter, Usage::VERTEX, INITIAL_VERT_SIZE)
+            .context("Error creating vertex buffer")?;
+        let index = StagedBuffer::new(device, adapter, Usage::INDEX, INITIAL_INDEX_SIZE)
+            .context("Error creating index buffer")?;
+
+        Ok(DrawBuffers {
+            vertex_buffer: ManuallyDrop::new(vert),
+            index_buffer: ManuallyDrop::new(index),
+        })
+    }
+
+    pub fn deactivate(self, device: &mut DeviceT) {
+        unsafe {
+            use core::ptr::read;
+
+            ManuallyDrop::into_inner(read(&self.vertex_buffer)).deactivate(device);
+            ManuallyDrop::into_inner(read(&self.index_buffer)).deactivate(device);
+        }
+    }
+}