feat: Implement Sequence and Effect system for demo choreography

Refactors the rendering pipeline into a modular Sequence/Effect system. 'MainSequence' manages the final frame rendering and a list of 'Sequence' layers. 'Sequence' manages a timeline of 'Effect' objects (start/end/priority). Concrete effects (Heptagon, Particles) are moved to 'demo_effects.cc'. Updates main loop to pass beat and aspect ratio.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/gpu/gpu.h b/src/gpu/gpu.h
index a78c433..f9c322c 100644
--- a/src/gpu/gpu.h
+++ b/src/gpu/gpu.h
@@ -32,7 +32,7 @@ struct RenderPass {
 };
 
 void gpu_init(GLFWwindow *window);
-void gpu_draw(float audio_peak, float aspect_ratio, float time);
+void gpu_draw(float audio_peak, float aspect_ratio, float time, float beat);
 void gpu_shutdown();
 
 // Helper functions (exposed for internal/future use)
@@ -42,10 +42,12 @@ struct ResourceBinding {
                               // WGPUBufferBindingType_Storage
 };
 
-GpuBuffer gpu_create_buffer(size_t size, uint32_t usage,
+GpuBuffer gpu_create_buffer(WGPUDevice device, size_t size, uint32_t usage,
                             const void *data = nullptr);
-ComputePass gpu_create_compute_pass(const char *shader_code,
+ComputePass gpu_create_compute_pass(WGPUDevice device, const char *shader_code,
                                     ResourceBinding *bindings,
                                     int num_bindings);
-RenderPass gpu_create_render_pass(const char *shader_code,
+RenderPass gpu_create_render_pass(WGPUDevice device,
+                                  WGPUTextureFormat format, // Needed for render pipeline
+                                  const char *shader_code,
                                   ResourceBinding *bindings, int num_bindings);