From c712874ece1ca7073904f5fb84cc866d28084de0 Mon Sep 17 00:00:00 2001 From: skal Date: Mon, 9 Feb 2026 13:52:37 +0100 Subject: feat(gpu): Add GPU procedural texture generation system MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Phase 1 implementation complete: - GPU compute shader for noise generation (gen_noise.wgsl) - TextureManager extensions: create_gpu_noise_texture(), dispatch_noise_compute() - Asset packer PROC_GPU() syntax support with validation - ShaderComposer integration for #include resolution - Zero CPU memory overhead (GPU-only textures) - Init-time and on-demand generation modes Technical details: - 8×8 workgroup size for 256×256 textures - UniformBuffer for params (width, height, seed, frequency) - Storage texture binding (rgba8unorm, write-only) - Lazy pipeline compilation on first use - ~300 bytes code (Phase 1) Testing: - New test: test_gpu_procedural.cc (passes) - All 34 tests passing (100%) Future phases: - Phase 2: Add gen_perlin, gen_grid compute shaders - Phase 3: Variable dimensions, async generation Co-Authored-By: Claude Sonnet 4.5 --- src/gpu/texture_manager.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'src/gpu/texture_manager.h') diff --git a/src/gpu/texture_manager.h b/src/gpu/texture_manager.h index 23fdbe8..0cffe0c 100644 --- a/src/gpu/texture_manager.h +++ b/src/gpu/texture_manager.h @@ -23,6 +23,13 @@ struct GpuTexture { int height; }; +struct GpuProceduralParams { + int width; + int height; + const float* params; + int num_params; +}; + class TextureManager { public: void init(WGPUDevice device, WGPUQueue queue); @@ -36,11 +43,24 @@ class TextureManager { void create_texture(const std::string& name, int width, int height, const uint8_t* data); + // GPU procedural generation + void create_gpu_noise_texture(const std::string& name, + const GpuProceduralParams& params); + +#if !defined(STRIP_ALL) + // On-demand lazy generation (stripped in final builds) + WGPUTextureView get_or_generate_gpu_texture(const std::string& name, + const GpuProceduralParams& params); +#endif + // Retrieves a texture view by name (returns nullptr if not found) WGPUTextureView get_texture_view(const std::string& name); private: + void dispatch_noise_compute(WGPUTexture target, + const GpuProceduralParams& params); WGPUDevice device_; WGPUQueue queue_; std::map textures_; + WGPUComputePipeline noise_compute_pipeline_ = nullptr; }; -- cgit v1.2.3