1 files changed, 26 insertions, 0 deletions
diff --git a/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl b/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl
new file mode 100644
index 0000000..06ca73a
--- /dev/null
+++ b/workspaces/main/shaders/cnn/cnn_conv3x3.wgsl
@@ -0,0 +1,26 @@
+// 3x3 convolution with weight indexing
+// Samples 9 pixels, applies mat4 weights per sample
+
+fn cnn_conv3x3(
+  tex: texture_2d<f32>,
+  samp: sampler,
+  uv: vec2<f32>,
+  resolution: vec2<f32>,
+  weights: array<mat4x4<f32>, 9>,
+  bias: vec4<f32>
+) -> vec4<f32> {
+  let step = 1.0 / resolution;
+  var sum = bias;
+  var idx = 0;
+
+  for (var dy = -1; dy <= 1; dy++) {
+    for (var dx = -1; dx <= 1; dx++) {
+      let offset = vec2<f32>(f32(dx), f32(dy)) * step;
+      let sample = textureSample(tex, samp, uv + offset);
+      sum += weights[idx] * sample;
+      idx++;
+    }
+  }
+
+  return sum;
+}