Welcome to the tour of WGSL

This site is a quick introduction to the WebGPU Shading Language. The tour provides an overview of the syntax and features of WGSL, but assumes a familiarity with programming.

The tour provides the WGSL shaders for each example. The shaders can be edited in the text view on the right (or below), and the resulting output is displayed below the editor.

The editor provides:

• Automatic execution of the entered shader.
• Inline error messages for shader compilation errors. Errors also appear in the developer console, so it may be handy to keep that open too.
• Pressing ctrl-o when the cursor is on an attribute (e.g. @builtin) a builtin value (e.g. vertex_index) or many of the builtin functions (e.g. sin) to show documentation on selected element.

Each of these shaders can serve as the starting point for your own exploration.

As a warmup, edit the frag_main function. Change the first component of its return value from 1 to 0, so it’s vec4(0, sin(f32(frame) / 128), 0, 1). What happens?

The tour is organized into sections:

• Functions
• Types
• Expressions
• Variables and declared values
• Control Flow
• Binding Points
• Uniformity Analysis

Each section has several sub-pages, and you can navigate forward and backward using the buttons on the bottom of each page. You can quickly get back to a higher level page using the breadcrumb links at the top of this pane.