# Makepad Font

> |

- **Type:** Skill
- **Install:** `agentstack add skill-sagev1-makepad-skills-makepad-font`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [SageV1](https://agentstack.voostack.com/s/sagev1)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [SageV1](https://github.com/SageV1)
- **Source:** https://github.com/SageV1/makepad-skills/tree/main/skills/makepad-font
- **Website:** https://sagev1.github.io

## Install

```sh
agentstack add skill-sagev1-makepad-skills-makepad-font
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Makepad Font Skill

> **Version:** makepad-widgets (dev branch) | **Last Updated:** 2026-01-19
>
> Check for updates: https://crates.io/crates/makepad-widgets

You are an expert at Makepad text and font rendering. Help users by:
- **Font configuration**: Font families, sizes, styles
- **Text layout**: Understanding text layouter and shaping
- **Text rendering**: GPU-based text rendering with SDF

## Documentation

Refer to the local files for detailed documentation:
- `./references/font-system.md` - Font module structure and APIs

## IMPORTANT: Documentation Completeness Check

**Before answering questions, Claude MUST:**

1. Read the relevant reference file(s) listed above
2. If file read fails or file is empty:
   - Inform user: "本地文档不完整，建议运行 `/sync-crate-skills makepad --force` 更新文档"
   - Still answer based on SKILL.md patterns + built-in knowledge
3. If reference file exists, incorporate its content into the answer

## Text Module Structure

```
draw/src/text/
├── font.rs           # Font handle and metrics
├── font_atlas.rs     # GPU texture atlas for glyphs
├── font_face.rs      # Font face data
├── font_family.rs    # Font family management
├── fonts.rs          # Built-in fonts
├── glyph_outline.rs  # Glyph vector outlines
├── glyph_raster_image.rs # Rasterized glyph images
├── layouter.rs       # Text layout engine
├── rasterizer.rs     # Glyph rasterization
├── sdfer.rs          # Signed distance field generator
├── selection.rs      # Text selection/cursor
├── shaper.rs         # Text shaping (harfbuzz)
```

## Using Fonts in DSL

### Text Style

```rust
 {
    text: "Hello World"
    draw_text: {
        text_style: {
            font: { path: dep("crate://self/resources/fonts/MyFont.ttf") }
            font_size: 16.0
            line_spacing: 1.5
            letter_spacing: 0.0
        }
        color: #FFFFFF
    }
}
```

### Theme Fonts

```rust
 {
    text: "Styled Text"
    draw_text: {
        text_style:  {
            font_size: (THEME_FONT_SIZE_P)
        }
    }
}
```

## Font Definition in DSL

```rust
live_design! {
    // Define font path
    FONT_REGULAR = {
        font: { path: dep("crate://self/resources/fonts/Regular.ttf") }
    }

    FONT_BOLD = {
        font: { path: dep("crate://self/resources/fonts/Bold.ttf") }
    }

    // Use in widget
     {
        draw_text: {
            text_style:  {
                font_size: 14.0
            }
        }
    }
}
```

## Layouter API

```rust
pub struct Layouter {
    loader: Loader,
    cache_size: usize,
    cached_params: VecDeque,
    cached_results: HashMap>,
}

impl Layouter {
    pub fn new(settings: Settings) -> Self;
    pub fn rasterizer(&self) -> &Rc>;
    pub fn is_font_family_known(&self, id: FontFamilyId) -> bool;
    pub fn define_font_family(&mut self, id: FontFamilyId, definition: FontFamilyDefinition);
    pub fn define_font(&mut self, id: FontId, definition: FontDefinition);
    pub fn get_or_layout(&mut self, params: impl LayoutParams) -> Rc;
}
```

## Layout Parameters

```rust
pub struct OwnedLayoutParams {
    pub text: Substr,
    pub spans: Box,
    pub options: LayoutOptions,
}

pub struct Span {
    pub style: Style,
    pub len: usize,
}

pub struct Style {
    pub font_family_id: FontFamilyId,
    pub font_size_in_pts: f32,
    pub color: Option,
}

pub struct LayoutOptions {
    pub max_width_in_lpxs: Option,  // Max width for wrapping
    pub wrap: bool,                       // Enable word wrap
    pub first_row_indent_in_lpxs: f32,    // First line indent
}
```

## Rasterizer Settings

```rust
pub struct Settings {
    pub loader: loader::Settings,
    pub cache_size: usize,  // Default: 4096
}

pub struct rasterizer::Settings {
    pub sdfer: sdfer::Settings {
        padding: 4,     // SDF padding
        radius: 8.0,    // SDF radius
        cutoff: 0.25,   // SDF cutoff
    },
    pub grayscale_atlas_size: Size::new(4096, 4096),
    pub color_atlas_size: Size::new(2048, 2048),
}
```

## DrawText Widget

```rust
 {
    // Label is a simple text widget
     {
        text: "Simple Label"
        draw_text: {
            color: #FFFFFF
            text_style: {
                font_size: 14.0
            }
        }
    }

    // TextFlow for rich text
     {
         { text: "Bold text" }
         { text: "Italic text" }
         {
            text: "Click here"
            href: "https://example.com"
        }
    }
}
```

## Text Properties

| Property | Type | Description |
|----------|------|-------------|
| `text` | String | Text content |
| `font` | Font | Font resource |
| `font_size` | f64 | Size in points |
| `line_spacing` | f64 | Line height multiplier |
| `letter_spacing` | f64 | Character spacing |
| `color` | Vec4 | Text color |
| `brightness` | f64 | Text brightness |
| `curve` | f64 | Text curve effect |

## When Answering Questions

1. Makepad uses SDF (Signed Distance Field) for crisp text at any scale
2. Fonts are loaded once and cached in GPU texture atlases
3. Text shaping uses harfbuzz for proper glyph positioning
4. Use `dep("crate://...")` for embedded font resources
5. Default font cache size is 4096 glyphs
6. Atlas sizes: 4096x4096 for grayscale, 2048x2048 for color (emoji)

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [SageV1](https://github.com/SageV1)
- **Source:** [SageV1/makepad-skills](https://github.com/SageV1/makepad-skills)
- **License:** MIT
- **Homepage:** https://sagev1.github.io

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-sagev1-makepad-skills-makepad-font
- Seller: https://agentstack.voostack.com/s/sagev1
- Browse the marketplace: https://agentstack.voostack.com/browse

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