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dev-ui-lesson

Teach building an immediate-mode UI system with font parsing, rasterization, and layout.

Updated Mar 17, 2026
Search Tags:#ui#immediate-mode#ttf#font-parsing#glyph-rasterization#atlas-packing
One-click install
npx skills add https://github.com/code-review-benchmark/coderabbit_prs2__forge-gpu__coderabbit__PR323__20260317 --skill dev-ui-lesson
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: dev-ui-lesson
Source: https://github.com/code-review-benchmark/coderabbit_prs2__forge-gpu__coderabbit__PR323__20260317/tree/main/.claude/skills/dev-ui-lesson
Command: npx skills add https://github.com/code-review-benchmark/coderabbit_prs2__forge-gpu__coderabbit__PR323__20260317 --skill dev-ui-lesson

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Add a practical UI lesson that teaches building an immediate-mode UI system from the ground up, covering font parsing, rasterization, and layout without GPU code, focusing on data generation for rendering.

Core Features & Use Cases

  • TTF font parsing and glyph rasterization to produce glyph metrics and bitmaps
  • Immediate-mode UI controls such as buttons, sliders, and text rendering with layout
  • Data-forward workflow: generates textures, vertex arrays, and index buffers for a downstream renderer
  • Use Case: teach health bars, inventories, or dev tools UI patterns in a game

Quick Start

Create a standalone UI lesson NN with a main.c that outputs BMPs showing glyphs, atlas layout, and simple widgets.

Frequently Asked Questions about dev-ui-lesson

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build an immediate-mode UI system from scratch?▼

Building an immediate-mode UI system from scratch involves parsing TTF fonts, rasterizing glyphs, and defining widget layouts to generate vertex arrays and index buffers for rendering.

How does TTF font parsing and glyph rasterization work for UI rendering?▼

TTF font parsing extracts glyph metrics, while glyph rasterization converts vector outlines into bitmaps. These bitmaps are packed into an atlas to provide texture data for immediate-mode UI text rendering.

Can I generate UI textures and vertex arrays without writing GPU code?▼

Yes, you can generate UI textures and vertex arrays without GPU code by adopting a data-first approach. The system outputs textures, vertex arrays, and index buffers to a downstream renderer, using BMP outputs for validation.

What is the best way to implement immediate-mode UI controls like buttons and sliders?▼

The best way to implement immediate-mode UI controls like buttons and sliders is through a data-forward workflow that calculates layout and produces vertex data for immediate rendering by a downstream GPU.

Why use atlas packing for font rendering in a CPU-first UI toolchain?▼

Atlas packing for font rendering consolidates multiple rasterized glyphs into a single texture. This optimizes memory usage and prepares efficient texture data for the downstream GPU rendering phase.

Does this immediate-mode UI lesson support rendering game UI patterns like health bars?▼

Yes, the immediate-mode UI lesson supports game UI patterns like health bars and inventories. It teaches widget layouts and data generation applicable to game UI and developer tools.

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