feat(lambda-rs): Add support for indexed draw commands

Author: vmarcella

.gitignore

@@ -147,3 +147,6 @@ bin
 # End of https://www.gitignore.io/api/linux,cpp,c,cmake,macos,opengl
 
 imgui.ini
+
+# Planning
+docs/plans/

crates/lambda-rs-platform/src/wgpu/gpu.rs

@@ -66,6 +66,8 @@ impl std::ops::BitOr for Features {
 pub struct GpuLimits {
   pub max_uniform_buffer_binding_size: u64,
   pub max_bind_groups: u32,
+  pub max_vertex_buffers: u32,
+  pub max_vertex_attributes: u32,
   pub min_uniform_buffer_offset_alignment: u32,
 }
 
@@ -250,6 +252,8 @@ impl Gpu {
         .max_uniform_buffer_binding_size
         .into(),
       max_bind_groups: self.limits.max_bind_groups,
+      max_vertex_buffers: self.limits.max_vertex_buffers,
+      max_vertex_attributes: self.limits.max_vertex_attributes,
       min_uniform_buffer_offset_alignment: self
         .limits
         .min_uniform_buffer_offset_alignment,

crates/lambda-rs-platform/src/wgpu/render_pass.rs

@@ -187,17 +187,22 @@ impl<'a> RenderPass<'a> {
   }
 
   /// Issue a non-indexed draw over a vertex range.
-  pub fn draw(&mut self, vertices: std::ops::Range<u32>) {
-    self.raw.draw(vertices, 0..1);
+  pub fn draw(
+    &mut self,
+    vertices: std::ops::Range<u32>,
+    instances: std::ops::Range<u32>,
+  ) {
+    self.raw.draw(vertices, instances);
   }
 
   /// Issue an indexed draw with a base vertex applied.
   pub fn draw_indexed(
     &mut self,
     indices: std::ops::Range<u32>,
     base_vertex: i32,
+    instances: std::ops::Range<u32>,
   ) {
-    self.raw.draw_indexed(indices, base_vertex, 0..1);
+    self.raw.draw_indexed(indices, base_vertex, instances);
   }
 }