refactor: Unify TextureManager compute pipeline management

Replace individual pipeline pointers with map-based system.
- Changed from 3 pointers to std::map<string, ComputePipelineInfo>
- Unified get_or_create_compute_pipeline() for lazy init
- Unified dispatch_compute() for all shaders
- Simplified create_gpu_*_texture() methods (~390 lines removed)

handoff(Claude): GPU procedural texture refactoring complete

1 files changed, 14 insertions, 9 deletions

diff --git a/src/gpu/texture_manager.h b/src/gpu/texture_manager.h
index b2dea84..63c2947 100644
--- a/src/gpu/texture_manager.h
+++ b/src/gpu/texture_manager.h
@@ -61,16 +61,21 @@ class TextureManager {
   WGPUTextureView get_texture_view(const std::string& name);
 
  private:
-  void dispatch_noise_compute(WGPUTexture target,
-                             const GpuProceduralParams& params);
-  void dispatch_perlin_compute(WGPUTexture target,
-                              const GpuProceduralParams& params);
-  void dispatch_grid_compute(WGPUTexture target,
-                            const GpuProceduralParams& params);
+  struct ComputePipelineInfo {
+    WGPUComputePipeline pipeline;
+    const char* shader_code;
+    size_t uniform_size;
+  };
+
+  WGPUComputePipeline get_or_create_compute_pipeline(const std::string& func_name,
+                                                      const char* shader_code,
+                                                      size_t uniform_size);
+  void dispatch_compute(const std::string& func_name, WGPUTexture target,
+                       const GpuProceduralParams& params, const void* uniform_data,
+                       size_t uniform_size);
+
   WGPUDevice device_;
   WGPUQueue queue_;
   std::map<std::string, GpuTexture> textures_;
-  WGPUComputePipeline noise_compute_pipeline_ = nullptr;
-  WGPUComputePipeline perlin_compute_pipeline_ = nullptr;
-  WGPUComputePipeline grid_compute_pipeline_ = nullptr;
+  std::map<std::string, ComputePipelineInfo> compute_pipelines_;
 };