fix: Increase dummy uniform buffer to 32 bytes for alignment

Related to Task #74. The dummy buffer used when effect_params is null
must be 32 bytes to match CommonPostProcessUniforms size, not 16 bytes.
Prevents potential validation errors when binding group expects 32-byte
uniform buffer at binding 3.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gpu/effects/post_process_helper.cc b/src/gpu/effects/post_process_helper.cc
index 4c1d3e1..74e052d 100644
--- a/src/gpu/effects/post_process_helper.cc
+++ b/src/gpu/effects/post_process_helper.cc
@@ -74,7 +74,7 @@ void pp_update_bind_group(WGPUDevice device, WGPURenderPipeline pipeline,
                           WGPUBindGroup* bind_group, WGPUTextureView input_view,
                           GpuBuffer uniforms, GpuBuffer effect_params) {
   if (!g_dummy_buffer.buffer) {
-    g_dummy_buffer = gpu_create_buffer(device, 16, WGPUBufferUsage_Uniform);
+    g_dummy_buffer = gpu_create_buffer(device, 32, WGPUBufferUsage_Uniform);
   }
 
   if (*bind_group)