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glslviewer-shader-debug

Render fragment shaders as headless PNG previews with glslViewer.

31|6|Updated Jan 29, 2026
Search Tags:#glsl#sdf#png output#headless rendering#shader debugging#glslviewer#runtime shader
One-click install
npx skills add https://github.com/openharmonyinsight/openharmony-skills --skill glslviewer-shader-debug
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: glslviewer-shader-debug
Source: https://github.com/openharmonyinsight/openharmony-skills/tree/main/skills/glslviewer-shader-debug
Command: npx skills add https://github.com/openharmonyinsight/openharmony-skills --skill glslviewer-shader-debug

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill helps you debug fragment-shader math by producing deterministic, headless rendered previews so you can visually verify SDFs, gradients, masks, and contour shapes before relying on device output.

Core Features & Use Cases

  • Shader translation guidance: Converts runtime-shader or SkSL-like snippets into standard GLSL by applying type, entry-point, and coordinate conventions.
  • Headless rendering with glslViewer: Renders one or more .frag files into reproducible PNG images for visual inspection in environments without a GUI.
  • Contour/mask visualization workflow: Encourages output patterns that make edge behavior and zero-crossings obvious using the provided template helper.

Quick Start

Use glslviewer-shader-debug to render your fragment shader into a headless PNG preview from a .frag file so you can compare the resulting contour or mask shape against expectations.

Frequently Asked Questions about glslviewer-shader-debug

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

FAQPage Schema
How do I debug GLSL fragment shader math without a GUI?▼

Headless shader debugging renders fragment shaders into reproducible PNG previews using glslViewer, letting you visually verify SDFs, gradients, and masks without a GUI or device output.

How do I render a .frag file to a PNG image for visual inspection?▼

Rendering a .frag file to a PNG image involves executing a headless rendering script with glslViewer, producing deterministic image frames for inspecting intermediate shader computations.

Can I use glslViewer to visualize SDF contour shapes and zero-crossings?▼

glslViewer can visualize SDF contour shapes and zero-crossings by rendering fragment shaders into PNG previews, applying output patterns that make edge behavior obvious for visual verification.

How do I translate SkSL or runtime shader snippets into standard GLSL for rendering?▼

Translating SkSL or runtime shader snippets into standard GLSL requires applying type mapping, entry-point rewriting, and coordinate convention adjustments so the code can be rendered headlessly by glslViewer.

What is headless rendering for fragment shaders and when do I need it?▼

Headless rendering for fragment shaders produces PNG image previews in environments without a GUI, needed when you want to visually verify shader math like SDFs and masks before relying on device output.

Does headless shader debugging work without any GUI environment?▼

Yes, headless shader debugging works without a GUI by using glslViewer to render fragment shaders into PNG images, enabling visual inspection of shader math in environments without a graphical interface.

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