1 files changed, 69 insertions, 2 deletions

diff --git a/src/gpu/effect.cc b/src/gpu/effect.cc
index a1b45f1..c2c36b4 100644
--- a/src/gpu/effect.cc
+++ b/src/gpu/effect.cc
@@ -2,8 +2,10 @@
 // It implements the Sequence management logic.
 
 #include "effect.h"
+#include "audio/tracker.h"
 #include "gpu/demo_effects.h"
 #include "gpu/gpu.h"
+#include "util/fatal_error.h"
 #include <algorithm>
 #include <cstdio>
 #include <typeinfo>
@@ -377,14 +379,79 @@ void MainSequence::shutdown() {
     wgpuTextureViewRelease(depth_view_);
   if (depth_texture_)
     wgpuTextureRelease(depth_texture_);
+  for (auto& [name, aux] : auxiliary_textures_) {
+    if (aux.view)
+      wgpuTextureViewRelease(aux.view);
+    if (aux.texture)
+      wgpuTextureRelease(aux.texture);
+  }
+  auxiliary_textures_.clear();
   for (ActiveSequence& entry : sequences_) {
     entry.seq->reset();
   }
 }
 
+// Register a named auxiliary texture for inter-effect sharing
+void MainSequence::register_auxiliary_texture(const char* name, int width,
+                                              int height) {
+  const std::string key(name);
+
+  // Check if already exists
+  auto it = auxiliary_textures_.find(key);
+  if (it != auxiliary_textures_.end()) {
+#if !defined(STRIP_ALL)
+    fprintf(stderr, "Warning: Auxiliary texture '%s' already registered\n",
+            name);
+#endif /* !defined(STRIP_ALL) */
+    return;
+  }
+
+  // Create texture
+  const WGPUTextureDescriptor desc = {
+      .usage =
+          WGPUTextureUsage_RenderAttachment | WGPUTextureUsage_TextureBinding,
+      .dimension = WGPUTextureDimension_2D,
+      .size = {(uint32_t)width, (uint32_t)height, 1},
+      .format = gpu_ctx.format,
+      .mipLevelCount = 1,
+      .sampleCount = 1,
+  };
+
+  WGPUTexture texture = wgpuDeviceCreateTexture(gpu_ctx.device, &desc);
+  FATAL_CHECK(!texture, "Failed to create auxiliary texture: %s\n", name);
+
+  // Create view
+  const WGPUTextureViewDescriptor view_desc = {
+      .format = gpu_ctx.format,
+      .dimension = WGPUTextureViewDimension_2D,
+      .mipLevelCount = 1,
+      .arrayLayerCount = 1,
+  };
+
+  WGPUTextureView view = wgpuTextureCreateView(texture, &view_desc);
+  FATAL_CHECK(!view, "Failed to create auxiliary texture view: %s\n", name);
+
+  // Store in registry
+  auxiliary_textures_[key] = {texture, view, width, height};
+
+#if !defined(STRIP_ALL)
+  printf("[MainSequence] Registered auxiliary texture '%s' (%dx%d)\n", name,
+         width, height);
+#endif /* !defined(STRIP_ALL) */
+}
+
+// Retrieve auxiliary texture view by name
+WGPUTextureView MainSequence::get_auxiliary_view(const char* name) {
+  const std::string key(name);
+  auto it = auxiliary_textures_.find(key);
+  FATAL_CHECK(it == auxiliary_textures_.end(),
+              "Auxiliary texture not found: %s\n", name);
+  return it->second.view;
+}
+
 #if !defined(STRIP_ALL)
-void MainSequence::simulate_until(float target_time, float step_rate) {
-  const float bpm = 128.0f;
+void MainSequence::simulate_until(float target_time, float step_rate,
+                                  float bpm) {
   const float aspect_ratio = 16.0f / 9.0f;
   for (float t = 0.0f; t < target_time; t += step_rate) {
     WGPUCommandEncoder encoder =