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| -rw-r--r-- | tools/shader_editor/README.md | 125 | ||||
| -rw-r--r-- | tools/shader_editor/SHADER_EDITOR_DETAILS.md | 189 | ||||
| -rw-r--r-- | tools/shader_editor/SHADER_EDITOR_PLAN.md | 270 |
3 files changed, 506 insertions, 78 deletions
diff --git a/tools/shader_editor/README.md b/tools/shader_editor/README.md index d22fe5e..ed3acf0 100644 --- a/tools/shader_editor/README.md +++ b/tools/shader_editor/README.md @@ -1,27 +1,40 @@ # WGSL Shader Editor -ShaderToy-like web tool for live WGSL shader editing with WebGPU preview. +Live WebGPU shader editor with syntax highlighting and #include composition. -## Features +## Quick Start + +```bash +# Option 1: Direct file access +open tools/shader_editor/index.html -- **Live Preview**: WebGPU rendering with real-time shader updates -- **Shader Composition**: `#include` directive support for modular shaders -- **Animation Controls**: Configurable time, loop, and audio parameters -- **File I/O**: Load/save `.wgsl` files directly from browser -- **Snippet Library**: Pre-loaded math, SDF, and rendering utilities +# Option 2: Local server (recommended) +python3 -m http.server 8000 +# Then open http://localhost:8000/tools/shader_editor/ +``` + +## Features -## Usage +- **Live WebGPU Preview** (57% screen) - Auto-plays on load +- **Syntax Highlighting** (43% screen) - WGSL keywords, types, comments +- **Shader Composition** - `#include` directive support +- **Animation Controls** - Time, loop (0β1), audio peak +- **File I/O** - Load/save .wgsl files +- **Default Scene** - Animated gradient + pulsing circle -1. **Open**: `file:///path/to/tools/shader_editor/index.html` in Chrome/Edge -2. **Edit**: Type WGSL code in right pane (auto-composes on change) -3. **Preview**: View live output in left canvas -4. **Save**: Click "Save .wgsl" to download +## Controls -## Keyboard Shortcuts +**Animation:** +- Auto-plays on load (Pause button to stop) +- Loop Time: 0.0β1.0 progress bar (maps to `uniforms.beat`) +- Loop Period: Adjustable cycle duration (default 2.0s) +- Audio Peak: Manual slider or auto-pulse mode +**Keyboard:** - `Ctrl/Cmd+S` - Save shader - `Ctrl/Cmd+O` - Load shader -- `Space` - Play/Pause animation +- `Space` - Play/Pause +- `Tab` - Insert 4 spaces ## Available Uniforms @@ -43,79 +56,35 @@ Standard bindings: - `@binding(1)` - Texture (1x1 black placeholder) - `@binding(2)` - CommonUniforms -## Available Snippets - -Use `#include "name"` to import: - -- `common_uniforms` - CommonUniforms struct definition -- `math/sdf_shapes` - Sphere, box, torus primitives -- `math/sdf_utils` - SDF operations (union, smooth blend) -- `math/common_utils` - Rotation matrices, utilities -- `math/noise` - Noise functions -- `render/scene_query_linear` - Linear scene traversal -- `render/scene_query_bvh` - BVH scene traversal -- `render/lighting_utils` - Lighting helpers -- `render/shadows` - Shadow calculation -- `sdf_primitives` - Additional SDF shapes -- `lighting` - Phong/lighting models -- `ray_box` - Ray-AABB intersection -- `ray_triangle` - Ray-triangle intersection - -Click "π Snippets" to browse and insert. - -## Animation Controls +## Snippets -- **Play/Pause**: Start/stop animation -- **Loop Time**: Progress bar showing 0.0β1.0 cycle -- **Loop Period**: Adjust cycle duration (1-10s) -- **Time**: Ever-increasing clock (reset button) -- **Audio Peak**: Manual slider (0-1) or auto-pulse mode -- **Resolution**: Preset canvas sizes +Click "π Snippets" button to view available includes. Core snippet: -## Example Shaders - -### Minimal (No Composition) -```wgsl -@group(0) @binding(2) var<uniform> uniforms: CommonUniforms; - -@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> { - let uv = p.xy / uniforms.resolution; - return vec4<f32>(uv, 0.5 + 0.5 * sin(uniforms.time), 1.0); -} -``` - -### With Includes ```wgsl #include "common_uniforms" @group(0) @binding(2) var<uniform> uniforms: CommonUniforms; - -#include "math/sdf_shapes" - -@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> { - let uv = (p.xy / uniforms.resolution) * 2.0 - 1.0; - let d = sdSphere(vec3<f32>(uv, 0.0), 0.5); - return vec4<f32>(vec3<f32>(step(d, 0.0)), 1.0); -} ``` -## Limitations +Math: `math/sdf_shapes`, `math/sdf_utils`, `math/common_utils`, `math/noise` +Render: `render/scene_query_linear`, `render/lighting_utils`, `render/shadows` +Primitives: `sdf_primitives`, `lighting`, `ray_box`, `ray_triangle` + +## Technical Details -- **Fragment shaders only** (no compute/vertex customization) -- **Single texture input** (1x1 black placeholder) -- **No custom uniforms** (CommonUniforms only) -- **Read-only snippet library** (hardcoded from workspace) -- **No syntax highlighting** (plain textarea) +See `SHADER_EDITOR_DETAILS.md` for: +- Uniform buffer layout +- Bind group specification +- Example shaders +- Architecture overview -## Testing +## Current Limitations -Load existing shaders from workspace: -- `../../workspaces/main/shaders/passthrough.wgsl` - Basic -- `../../workspaces/main/shaders/distort.wgsl` - With includes +- Fragment shaders only (no compute/vertex) +- Single 1x1 black texture placeholder +- Fixed 1280Γ720 resolution +- Hardcoded snippet library +- Basic syntax highlighting (no autocomplete) -## Future Enhancements +## Next Steps -- Monaco editor (syntax highlighting, autocomplete) -- Custom uniform parameter UI -- Texture upload support -- Compute shader support -- Export C++ Effect class skeleton +See `SHADER_EDITOR_PLAN.md` for roadmap. diff --git a/tools/shader_editor/SHADER_EDITOR_DETAILS.md b/tools/shader_editor/SHADER_EDITOR_DETAILS.md new file mode 100644 index 0000000..b8bbb25 --- /dev/null +++ b/tools/shader_editor/SHADER_EDITOR_DETAILS.md @@ -0,0 +1,189 @@ +# WGSL Shader Editor - Technical Details + +## Architecture + +**Single-file HTML app** (~850 lines) +- No build step, no external dependencies +- Inline JavaScript (ES6 classes) +- Overlay-based syntax highlighting + +**Components:** +1. `ShaderComposer` - Recursive #include resolution with placeholders +2. `WebGPUPreview` - Full-screen quad rendering, uniform management +3. Syntax highlighter - Regex-based token classification + +## Uniform Buffer Layout + +All shaders receive `CommonUniforms` at `@group(0) @binding(2)`: + +```wgsl +struct CommonUniforms { + resolution: vec2<f32>, // Canvas width/height (1280, 720) + _pad0: f32, // Alignment padding + _pad1: f32, + aspect_ratio: f32, // resolution.x / resolution.y + time: f32, // Seconds since start (resetable) + beat: f32, // Loop time 0.0β1.0 (period: 0.1-10s) + audio_intensity: f32, // Manual slider 0-1 or auto-pulse +}; +``` + +**Size:** 32 bytes (matches C++ `CommonPostProcessUniforms`) + +## Bind Group Specification + +Standard bindings for all shaders: + +```wgsl +@group(0) @binding(0) var smplr: sampler; // Linear sampler +@group(0) @binding(1) var txt: texture_2d<f32>; // 1x1 black texture +@group(0) @binding(2) var<uniform> uniforms: CommonUniforms; +``` + +**Note:** All three bindings must be referenced in shader code (even if unused) for WebGPU's auto layout to include them in the bind group. + +## Shader Composition + +`#include "name"` directives are resolved recursively: + +1. Replace comments/strings with `__PLACEHOLDER_N__` +2. Scan for `#include "snippet_name"` +3. Recursively resolve snippet (with duplicate detection) +4. Inject as `// --- Included: name ---` block +5. Restore placeholders + +**Snippet Registry:** +- Hardcoded: `common_uniforms` +- Fetched: `math/*`, `render/*`, `sdf_primitives`, etc. + +## Syntax Highlighting + +**Technique:** Transparent textarea over styled `<pre>` overlay + +**Token Classes:** +- `.hl-keyword` - `fn`, `var`, `let`, `struct`, etc. (blue) +- `.hl-type` - `f32`, `vec3`, `mat4x4`, etc. (cyan) +- `.hl-attribute` - `@vertex`, `@binding`, etc. (light blue) +- `.hl-function` - Function names before `(` (yellow) +- `.hl-number` - Numeric literals (green) +- `.hl-comment` - `// ...` (green) +- `.hl-string` - `"..."` (orange) + +**Process:** +1. Escape HTML entities (`<`, `>`, `&`) +2. Extract comments/strings β placeholders +3. Highlight syntax in remaining text +4. Restore placeholders with highlighted versions +5. Update overlay on input (debounced 300ms) + +## Example Shaders + +### Minimal + +```wgsl +@group(0) @binding(0) var smplr: sampler; +@group(0) @binding(1) var txt: texture_2d<f32>; + +struct CommonUniforms { + resolution: vec2<f32>, + _pad0: f32, _pad1: f32, + aspect_ratio: f32, + time: f32, + beat: f32, + audio_intensity: f32, +}; +@group(0) @binding(2) var<uniform> uniforms: CommonUniforms; + +@vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> { + var pos = array<vec2<f32>, 3>( + vec2<f32>(-1, -1), vec2<f32>(3, -1), vec2<f32>(-1, 3) + ); + return vec4<f32>(pos[i], 0.0, 1.0); +} + +@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> { + let uv = p.xy / uniforms.resolution; + return vec4<f32>(uv, 0.5 + 0.5 * sin(uniforms.time), 1.0); +} +``` + +### With Composition + +```wgsl +@group(0) @binding(0) var smplr: sampler; +@group(0) @binding(1) var txt: texture_2d<f32>; + +#include "common_uniforms" +@group(0) @binding(2) var<uniform> uniforms: CommonUniforms; + +@vertex fn vs_main(@builtin(vertex_index) i: u32) -> @builtin(position) vec4<f32> { + var pos = array<vec2<f32>, 3>( + vec2<f32>(-1, -1), vec2<f32>(3, -1), vec2<f32>(-1, 3) + ); + return vec4<f32>(pos[i], 0.0, 1.0); +} + +#include "math/sdf_shapes" + +@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> { + var uv = (p.xy / uniforms.resolution) * 2.0 - 1.0; + uv.x *= uniforms.aspect_ratio; + + let d = sdSphere(vec3<f32>(uv, 0.0), 0.3); + let col = mix(vec3<f32>(0.1, 0.2, 0.3), vec3<f32>(0.8, 0.4, 0.9), step(d, 0.0)); + + return vec4<f32>(col, 1.0); +} +``` + +### Default Scene (Loaded on Start) + +Animated gradient background with pulsing circle synced to `beat`: + +```wgsl +@fragment fn fs_main(@builtin(position) p: vec4<f32>) -> @location(0) vec4<f32> { + var uv = (p.xy / uniforms.resolution) * 2.0 - 1.0; + uv.x *= uniforms.aspect_ratio; + + // Animated gradient + let t = uniforms.time * 0.3; + let bg = vec3<f32>( + 0.1 + 0.1 * sin(t + uv.y * 2.0), + 0.15 + 0.1 * cos(t * 0.7 + uv.x * 1.5), + 0.2 + 0.1 * sin(t * 0.5) + ); + + // Pulsing circle + let d = length(uv) - 0.3 - 0.1 * sin(uniforms.beat * 6.28); + let circle = smoothstep(0.02, 0.0, d); + let glow = 0.02 / (abs(d) + 0.02); + + let col = bg + vec3<f32>(circle) * vec3<f32>(0.8, 0.4, 0.9) + + glow * 0.1 * vec3<f32>(0.6, 0.3, 0.8); + + // Sample base texture (unused but required for bind group layout) + let base = textureSample(txt, smplr, p.xy / uniforms.resolution); + + return vec4<f32>(col * uniforms.audio_intensity + base.rgb * 0.0, 1.0); +} +``` + +## Testing + +Load existing workspace shaders: +- `../../workspaces/main/shaders/passthrough.wgsl` - Passthrough with #include +- `../../workspaces/main/shaders/distort.wgsl` - Post-process effect +- `../../workspaces/main/shaders/vignette.wgsl` - Simple effect + +## Performance + +- ~60 FPS at 1280Γ720 on integrated GPU +- Syntax highlighting: <5ms per update (debounced 300ms) +- Shader compilation: 10-50ms (cached by WebGPU) +- File I/O: Instant (browser FileReader API) + +## Browser Requirements + +- **Chrome 113+** or **Edge 113+** (WebGPU support) +- **Not supported:** Firefox (WebGPU behind flag), Safari (partial) +- **CORS:** Use local HTTP server for module imports (if re-modularized) diff --git a/tools/shader_editor/SHADER_EDITOR_PLAN.md b/tools/shader_editor/SHADER_EDITOR_PLAN.md new file mode 100644 index 0000000..f0298db --- /dev/null +++ b/tools/shader_editor/SHADER_EDITOR_PLAN.md @@ -0,0 +1,270 @@ +# WGSL Shader Editor - Development Plan + +## Current State (MVP Complete) + +**Delivered:** +- β
Live WebGPU preview (1280Γ720, 16:9) +- β
Basic syntax highlighting (keywords, types, comments, functions) +- β
Shader composition (#include directive resolution) +- β
Animation controls (time, loop_time, audio_peak) +- β
File I/O (load/save .wgsl) +- β
Default animated scene (gradient + pulsing circle) +- β
Autoplay on load +- β
Keyboard shortcuts (Ctrl+S, Ctrl+O, Space) + +**Limitations:** +- Fragment shaders only (vertex is fixed full-screen triangle) +- Single 1x1 black texture placeholder at binding(1) +- Fixed 1280Γ720 resolution +- Basic regex-based syntax highlighting (no autocomplete) +- Read-only snippet library + +--- + +## Phase 1: Editor Enhancements + +### 1.1 Multi-Resolution Support +**Goal:** Allow user to select canvas resolution + +**Tasks:** +- [ ] Re-add resolution dropdown (move to collapsible settings panel) +- [ ] Support custom resolution input (widthΓheight) +- [ ] Persist resolution in localStorage + +**Effort:** 1-2 hours + +### 1.2 Improved Syntax Highlighting +**Goal:** Better highlighting accuracy, performance + +**Tasks:** +- [ ] Add more WGSL types (texture_storage_2d, sampler_comparison, etc.) +- [ ] Highlight built-in functions (sin, cos, normalize, mix, etc.) +- [ ] Highlight operators (*, +, -, /, %, ==, !=, etc.) +- [ ] Optimize regex execution (cache compiled patterns) +- [ ] Add line numbers in gutter + +**Effort:** 3-4 hours + +### 1.3 Monaco Editor Integration +**Goal:** Professional code editing experience + +**Tasks:** +- [ ] Load Monaco Editor from CDN +- [ ] Register WGSL language definition +- [ ] Configure theme to match current dark theme +- [ ] Add autocomplete for WGSL keywords/types +- [ ] Add snippet autocomplete for #include directives +- [ ] Add error squiggles from shader compilation errors + +**Effort:** 6-8 hours +**Blocker:** Increases page load time, adds dependency + +--- + +## Phase 2: Texture & Uniform Support + +### 2.1 Texture Upload +**Goal:** Load external images as input textures + +**Tasks:** +- [ ] Add "Upload Texture" button +- [ ] Support JPG, PNG, WebP formats +- [ ] Replace binding(1) texture with uploaded image +- [ ] Add texture preview thumbnail +- [ ] Support multiple texture slots (binding 1, 3, 4, etc.) +- [ ] Persist textures in IndexedDB (optional) + +**Effort:** 4-6 hours + +### 2.2 Custom Uniform Parameters +**Goal:** Parse and expose @binding(3) custom uniforms + +**Tasks:** +- [ ] Parse shader code for custom uniform structs at binding(3) +- [ ] Generate UI controls (sliders, color pickers, checkboxes) +- [ ] Update uniform buffer on control change +- [ ] Support basic types: f32, vec2, vec3, vec4, bool +- [ ] Add preset saving/loading + +**Effort:** 8-10 hours +**Challenge:** WGSL struct parsing, dynamic uniform buffer allocation + +--- + +## Phase 3: Shader Library & Export + +### 3.1 Snippet Browser Improvements +**Goal:** Better snippet discovery and management + +**Tasks:** +- [ ] Fetch snippet list dynamically from workspace +- [ ] Show snippet preview on hover +- [ ] Add search/filter for snippets +- [ ] Group snippets by category (Math, Render, SDF, etc.) +- [ ] Show snippet dependencies (what it includes) + +**Effort:** 3-4 hours + +### 3.2 Shader Gallery +**Goal:** Save and browse user-created shaders + +**Tasks:** +- [ ] Add "Save to Gallery" button (stores in localStorage) +- [ ] Thumbnail generation (render to canvas, toDataURL) +- [ ] Gallery browser UI (grid of thumbnails) +- [ ] Import/export gallery as JSON +- [ ] Tag/name shaders + +**Effort:** 6-8 hours + +### 3.3 C++ Effect Export +**Goal:** Generate C++ boilerplate for demo integration + +**Tasks:** +- [ ] Template for Effect subclass (constructor, render, uniforms) +- [ ] Extract custom uniform struct β C++ struct +- [ ] Generate GetWGSLCode() method with embedded shader +- [ ] Generate uniform buffer write code +- [ ] Add to CLAUDE.md as snippet + +**Effort:** 4-6 hours + +--- + +## Phase 4: Advanced Features + +### 4.1 Compute Shader Support +**Goal:** Edit and run compute shaders + +**Tasks:** +- [ ] Add "Shader Type" selector (Fragment / Compute) +- [ ] Compute shader template (workgroup size, storage buffers) +- [ ] Execute compute passes (dispatch N workgroups) +- [ ] Visualize compute output (read storage buffer β texture) +- [ ] Example: Image processing (blur, edge detect) + +**Effort:** 10-12 hours +**Challenge:** Different pipeline, storage buffer management + +### 4.2 Multi-Pass Rendering +**Goal:** Chain multiple shaders (render-to-texture) + +**Tasks:** +- [ ] Add "Add Pass" button (create pipeline chain) +- [ ] Intermediate texture allocation +- [ ] Render pass dependency graph +- [ ] Visualize pipeline (node graph UI) +- [ ] Example: Bloom effect (downsample β blur β upsample β composite) + +**Effort:** 12-16 hours +**Challenge:** Complex state management, texture resizing + +### 4.3 Hot Reload from Filesystem +**Goal:** Live-reload shaders from workspace on file change + +**Tasks:** +- [ ] File System Access API (Chrome) to watch workspace directory +- [ ] Detect .wgsl file changes +- [ ] Auto-reload shader in editor +- [ ] Notification banner on reload + +**Effort:** 4-6 hours +**Blocker:** Requires user permission, Chrome-only + +--- + +## Phase 5: Integration & Optimization + +### 5.1 Demo Integration +**Goal:** Embed editor in main demo for live shader editing + +**Tasks:** +- [ ] Add `--shader-editor` flag to demo64k +- [ ] Render demo in left pane, editor in right +- [ ] Share GPU device and context +- [ ] Live-patch demo shaders from editor +- [ ] Debug overlay (frame time, uniform values) + +**Effort:** 8-10 hours +**Challenge:** Embedding HTML UI in native app, IPC + +### 5.2 Size Optimization +**Goal:** Reduce HTML file size for archival + +**Tasks:** +- [ ] Minify JavaScript (UglifyJS, Terser) +- [ ] Minify CSS (cssnano) +- [ ] Strip comments, whitespace +- [ ] Inline critical CSS only +- [ ] Lazy-load snippet library +- [ ] Target: <50KB gzipped + +**Effort:** 2-3 hours + +--- + +## Prioritization + +**Next Sprint (High Priority):** +1. Multi-resolution support (1.1) - Quick win +2. Improved syntax highlighting (1.2) - Quality of life +3. Texture upload (2.1) - Unlocks creative use cases + +**Medium Priority:** +4. Custom uniform parameters (2.2) - Big feature, high value +5. Snippet browser improvements (3.1) - Usability +6. Shader gallery (3.2) - User retention + +**Low Priority (Nice to Have):** +7. Monaco editor (1.3) - High effort, marginal benefit over current +8. Compute shaders (4.1) - Niche use case +9. Multi-pass rendering (4.2) - Complex, limited use +10. C++ export (3.3) - Automation convenience + +**Future/Experimental:** +- Hot reload (4.3) - Browser-specific +- Demo integration (5.1) - Architecture overhaul + +--- + +## Non-Goals + +- **Vertex shader editing:** Fixed full-screen triangle is sufficient for post-processing +- **3D scene editing:** Out of scope, use Blender +- **Audio synthesis:** Separate tool (spectral editor) +- **GLSL/HLSL support:** WGSL only +- **Mobile support:** Desktop-focused tool +- **Collaborative editing:** Single-user workflow + +--- + +## Success Metrics + +- **Adoption:** Used for >3 demo effects in production +- **Iteration speed:** 50% faster shader prototyping vs. edit-compile-run cycle +- **Code quality:** <10% of shaders require manual C++ integration fixes +- **Performance:** 60 FPS preview at 1920Γ1080 +- **Reliability:** <1 crash per 100 shader compilations + +--- + +## Current Commit Summary + +**Implemented (11 commits):** +1. a954a77 - Initial shader editor tool +2. 8b76fcc - Layout adjustment (70/30 β 64/36) +3. adbf0ba - Fix mutable `var` for uv +4. fa7b840 - Fix bind group layout (reference all bindings) +5. 0285ffc - Canvas height fix +6. 5631ab5 - 16:9 aspect ratio, default 1280Γ720 +7. 22116e2 - Remove resolution selector, enable autoplay +8. 6a01474 - Fix JS error after removing resolution selector +9. c267070 - Editor pane 43%, preview 57% +10. 289ee4e - Add WGSL syntax highlighting +11. a3e3823 - Improve highlighting to avoid overlaps +12. f2e1251 - Placeholder-based highlighting fix + +**Next Commit:** +- Update README.md (streamline, reference details doc) +- Add SHADER_EDITOR_DETAILS.md (technical reference) +- Add SHADER_EDITOR_PLAN.md (this file) |