From 47397444b30b0f461b1633297a68300179586fda Mon Sep 17 00:00:00 2001 From: skal Date: Tue, 10 Feb 2026 08:01:25 +0100 Subject: feat: Add CNN post-processing effect with modular WGSL architecture MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implements multi-layer convolutional neural network shader for stylized post-processing of 3D rendered scenes: **Core Components:** - CNNEffect: C++ effect class with single-layer rendering (expandable to multi-pass) - Modular WGSL snippets: cnn_activation, cnn_conv3x3/5x5/7x7, cnn_weights_generated - Placeholder identity-like weights for initial testing (to be replaced by trained weights) **Architecture:** - Flexible kernel sizes (3×3, 5×5, 7×7) via separate snippet files - ShaderComposer integration (#include resolution) - Residual connections (input + processed output) - Supports parallel convolutions (design ready, single conv implemented) **Size Impact:** - ~3-4 KB shader code (snippets + main shader) - ~2-4 KB weights (depends on network architecture when trained) - Total: ~5-8 KB (acceptable for 64k demo) **Testing:** - CNNEffect added to test_demo_effects.cc - 36/36 tests passing (100%) **Next Steps:** - Training script (scripts/train_cnn.py) to generate real weights - Multi-layer rendering with ping-pong textures - Weight quantization for size optimization handoff(Claude): CNN effect foundation complete, ready for training integration --- src/gpu/effects/shaders.cc | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/gpu/effects/shaders.cc') diff --git a/src/gpu/effects/shaders.cc b/src/gpu/effects/shaders.cc index 625c5b6..6559bf5 100644 --- a/src/gpu/effects/shaders.cc +++ b/src/gpu/effects/shaders.cc @@ -51,6 +51,13 @@ void InitShaderComposer() { register_if_exists("ray_box", AssetId::ASSET_SHADER_RAY_BOX); register_if_exists("ray_triangle", AssetId::ASSET_SHADER_RAY_TRIANGLE); + + register_if_exists("cnn_activation", AssetId::ASSET_SHADER_CNN_ACTIVATION); + register_if_exists("cnn_conv3x3", AssetId::ASSET_SHADER_CNN_CONV3X3); + register_if_exists("cnn_conv5x5", AssetId::ASSET_SHADER_CNN_CONV5X5); + register_if_exists("cnn_conv7x7", AssetId::ASSET_SHADER_CNN_CONV7X7); + register_if_exists("cnn_weights_generated", + AssetId::ASSET_SHADER_CNN_WEIGHTS); } // Helper to get asset string or empty string @@ -99,6 +106,10 @@ const char* chroma_aberration_shader_wgsl = SafeGetAsset(AssetId::ASSET_SHADER_CHROMA_ABERRATION); +const char* cnn_layer_shader_wgsl = + + SafeGetAsset(AssetId::ASSET_SHADER_CNN_LAYER); + const char* gen_noise_compute_wgsl = SafeGetAsset(AssetId::ASSET_SHADER_COMPUTE_GEN_NOISE); -- cgit v1.2.3