1 files changed, 4 insertions, 5 deletions
diff --git a/src/gpu/effects/moving_ellipse_effect.cc b/src/gpu/effects/moving_ellipse_effect.cc
index 945f807..9866f20 100644
--- a/src/gpu/effects/moving_ellipse_effect.cc
+++ b/src/gpu/effects/moving_ellipse_effect.cc
@@ -7,10 +7,8 @@
 
 // --- MovingEllipseEffect ---
 MovingEllipseEffect::MovingEllipseEffect(const GpuContext& ctx) : Effect(ctx) {
-  uniforms_ =
-      gpu_create_buffer(ctx_.device, sizeof(CommonPostProcessUniforms),
-                        WGPUBufferUsage_Uniform | WGPUBufferUsage_CopyDst);
-  ResourceBinding bindings[] = {{uniforms_, WGPUBufferBindingType_Uniform}};
+  // uniforms_ is initialized by Effect base class
+  ResourceBinding bindings[] = {{uniforms_.get(), WGPUBufferBindingType_Uniform}};
   pass_ = gpu_create_render_pass(ctx_.device, ctx_.format, ellipse_shader_wgsl,
                                  bindings, 1);
   pass_.vertex_count = 3;
@@ -19,12 +17,13 @@ void MovingEllipseEffect::render(WGPURenderPassEncoder pass, float t, float b,
                                  float i, float a) {
   const CommonPostProcessUniforms u = {
       .resolution = {(float)width_, (float)height_},
+      ._pad = {0.0f, 0.0f},
       .aspect_ratio = a,
       .time = t,
       .beat = b,
       .audio_intensity = i,
   };
-  wgpuQueueWriteBuffer(ctx_.queue, uniforms_.buffer, 0, &u, sizeof(u));
+  uniforms_.update(ctx_.queue, u);
   wgpuRenderPassEncoderSetPipeline(pass, pass_.pipeline);
   wgpuRenderPassEncoderSetBindGroup(pass, 0, pass_.bind_group, 0, nullptr);
   wgpuRenderPassEncoderDraw(pass, 3, 1, 0, 0);