From 766c0b0a41ddb4ac1fae68f720a9176a1b5f6070 Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Mon, 16 Feb 2026 09:43:06 +0100
Subject: feat(sequence): add inline post-process functions for v2

- Create postprocess_inline.wgsl with 7 inline effect functions
- Functions: vignette, flash, fade, theme, solarize, chroma_aberration, distort
- Add example combined_postprocess_v2.wgsl showing usage
- Register postprocess_inline snippet with ShaderComposer
- Add to main and test workspace assets
- All tests passing (36/36)

Strategy: Simple effects become inline functions instead of separate classes.
Complex effects (rotating_cube, hybrid_3d, particles) remain as TODO for v2 port.

handoff(Claude): Inline functions ready, 7 simple effects consolidated
---
 common/shaders/postprocess_inline.wgsl | 61 ++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 common/shaders/postprocess_inline.wgsl

(limited to 'common/shaders/postprocess_inline.wgsl')

diff --git a/common/shaders/postprocess_inline.wgsl b/common/shaders/postprocess_inline.wgsl
new file mode 100644
index 0000000..fcc5e27
--- /dev/null
+++ b/common/shaders/postprocess_inline.wgsl
@@ -0,0 +1,61 @@
+// Inline post-process functions for simple effects
+// Use these instead of separate effect classes for v2 sequences
+
+// Vignette: darkens edges based on distance from center
+fn apply_vignette(color: vec4<f32>, uv: vec2<f32>, radius: f32, softness: f32, intensity: f32) -> vec4<f32> {
+  let d = distance(uv, vec2<f32>(0.5, 0.5));
+  let vignette = smoothstep(radius, radius - softness, d);
+  return vec4<f32>(color.rgb * mix(1.0, vignette, intensity), color.a);
+}
+
+// Flash: additive white flash
+fn apply_flash(color: vec4<f32>, flash_intensity: f32) -> vec4<f32> {
+  return color + vec4<f32>(flash_intensity, flash_intensity, flash_intensity, 0.0);
+}
+
+// Fade: linear interpolation to target color
+fn apply_fade(color: vec4<f32>, fade_amount: f32, fade_color: vec3<f32>) -> vec4<f32> {
+  return vec4<f32>(mix(color.rgb, fade_color, fade_amount), color.a);
+}
+
+// Theme modulation: multiply by color tint
+fn apply_theme(color: vec4<f32>, theme_color: vec3<f32>, strength: f32) -> vec4<f32> {
+  return vec4<f32>(mix(color.rgb, color.rgb * theme_color, strength), color.a);
+}
+
+// Solarize: threshold-based color inversion
+fn apply_solarize(color: vec4<f32>, threshold: f32, strength: f32, time: f32) -> vec4<f32> {
+  let pattern_num = u32(time / 2.0);
+  let is_even = (pattern_num % 2u) == 0u;
+  let thr = threshold + 0.15 * sin(time);
+  var col = color;
+  
+  if (is_even) {
+    if (col.r < thr) { col.r = mix(col.r, 1.0 - col.r, strength); }
+    if (col.g < thr) { col.g = mix(col.g, 1.0 - col.g * 0.7, strength * 0.7); }
+    if (col.b < thr) { col.b = mix(col.b, col.b * 0.5, strength); }
+  } else {
+    if (col.r < thr) { col.r = mix(col.r, col.r * 0.6, strength); }
+    if (col.g < thr) { col.g = mix(col.g, 1.0 - col.g * 0.8, strength * 0.8); }
+    if (col.b < thr) { col.b = mix(col.b, 1.0 - col.b, strength); }
+  }
+  return col;
+}
+
+// Chroma aberration: RGB channel offset
+fn apply_chroma_aberration(input_tex: texture_2d<f32>, input_sampler: sampler, 
+                           uv: vec2<f32>, offset: f32, resolution: vec2<f32>) -> vec4<f32> {
+  let pixel_offset = offset / resolution;
+  let r = textureSample(input_tex, input_sampler, uv + vec2<f32>(pixel_offset.x, 0.0)).r;
+  let g = textureSample(input_tex, input_sampler, uv).g;
+  let b = textureSample(input_tex, input_sampler, uv - vec2<f32>(pixel_offset.x, 0.0)).b;
+  let a = textureSample(input_tex, input_sampler, uv).a;
+  return vec4<f32>(r, g, b, a);
+}
+
+// Distort: UV distortion based on time
+fn apply_distort(uv: vec2<f32>, time: f32, strength: f32) -> vec2<f32> {
+  let distort_x = sin(uv.y * 10.0 + time * 2.0) * strength;
+  let distort_y = cos(uv.x * 10.0 + time * 2.0) * strength;
+  return uv + vec2<f32>(distort_x, distort_y);
+}
-- 
cgit v1.2.3