fix: Add ShaderComposer to CircleMaskEffect pipelines

CircleMaskEffect was creating shader modules directly without using
ShaderComposer, causing #include directives to fail at runtime.

Changes:
- Add ShaderComposer.Compose() for compute and render shaders
- Include shader_composer.h header

Fixes demo64k crash on CircleMaskEffect initialization.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/src/gpu/effects/circle_mask_effect.cc b/src/gpu/effects/circle_mask_effect.cc
index 720b6ea..ca80cf9 100644
--- a/src/gpu/effects/circle_mask_effect.cc
+++ b/src/gpu/effects/circle_mask_effect.cc
@@ -3,6 +3,7 @@
 // Generates circular mask and renders green background outside circle.
 
 #include "gpu/effects/circle_mask_effect.h"
+#include "gpu/effects/shader_composer.h"
 #include "generated/assets.h"
 
 CircleMaskEffect::CircleMaskEffect(const GpuContext& ctx, float radius)
@@ -47,9 +48,12 @@ void CircleMaskEffect::init(MainSequence* demo) {
   const char* render_shader = (const char*)GetAsset(
       AssetId::ASSET_CIRCLE_MASK_RENDER_SHADER, &render_size);
 
+  // Compose shaders to resolve #include directives
+  std::string composed_compute = ShaderComposer::Get().Compose({}, compute_shader);
+
   WGPUShaderSourceWGSL compute_wgsl = {};
   compute_wgsl.chain.sType = WGPUSType_ShaderSourceWGSL;
-  compute_wgsl.code = str_view(compute_shader);
+  compute_wgsl.code = str_view(composed_compute.c_str());
 
   WGPUShaderModuleDescriptor compute_desc = {};
   compute_desc.nextInChain = &compute_wgsl.chain;
@@ -94,9 +98,11 @@ void CircleMaskEffect::init(MainSequence* demo) {
   compute_bind_group_ =
       wgpuDeviceCreateBindGroup(ctx_.device, &compute_bg_desc);
 
+  std::string composed_render = ShaderComposer::Get().Compose({}, render_shader);
+
   WGPUShaderSourceWGSL render_wgsl = {};
   render_wgsl.chain.sType = WGPUSType_ShaderSourceWGSL;
-  render_wgsl.code = str_view(render_shader);
+  render_wgsl.code = str_view(composed_render.c_str());
 
   WGPUShaderModuleDescriptor render_desc = {};
   render_desc.nextInChain = &render_wgsl.chain;