feat: migrate GPU renderer from WebGL to wgpu/WASM

1 files changed, 34 insertions, 0 deletions

diff --git a/rust/crates/gpu/src/shaders/gaussian_blur.wgsl b/rust/crates/gpu/src/shaders/gaussian_blur.wgsl
new file mode 100644
index 00000000..6c8d311d
--- /dev/null
+++ b/rust/crates/gpu/src/shaders/gaussian_blur.wgsl
@@ -0,0 +1,34 @@
+struct VertexOutput {
+    @builtin(position) position: vec4f,
+    @location(0) tex_coord: vec2f,
+}
+
+struct EffectUniforms {
+    resolution: vec2f,
+    direction: vec2f,
+    scalars: vec4f,
+}
+
+@group(0) @binding(0) var input_texture: texture_2d<f32>;
+@group(0) @binding(1) var input_sampler: sampler;
+@group(1) @binding(0) var<uniform> uniforms: EffectUniforms;
+
+@fragment
+fn fragment_main(input: VertexOutput) -> @location(0) vec4f {
+    let texel_size = vec2f(1.0, 1.0) / uniforms.resolution;
+    let sigma = uniforms.scalars.x;
+    let step_size = uniforms.scalars.y;
+
+    var color = vec4f(0.0, 0.0, 0.0, 0.0);
+    var total_weight = 0.0;
+
+    for (var index = -30; index <= 30; index = index + 1) {
+        let position = f32(index) * step_size;
+        let weight = exp(-(position * position) / (2.0 * sigma * sigma));
+        let sample_uv = input.tex_coord + (texel_size * uniforms.direction * position);
+        color = color + textureSample(input_texture, input_sampler, sample_uv) * weight;
+        total_weight = total_weight + weight;
+    }
+
+    return color / total_weight;
+}