Shadertoy shaders use different uniform names from glslViewer and will not run as-is

Shadertoy and glslViewer use different conventions for built-in uniforms and the entry-point signature. Pasting Shadertoy code directly into a glslViewer .frag file causes undeclared-identifier errors. The translation table is: iTime → u_time, iResolution → u_resolution, iMouse → u_mouse, fragCoord → gl_FragCoord, fragColor → gl_FragColor, and mainImage(out vec4 f, vec2 c) → void main(). After translation, the Shadertoy body runs correctly.

Examples

Shadertoy: void mainImage(out vec4 fragColor, vec2 fragCoord). glslViewer: void main() { gl_FragColor = ... }.

Assessment

List the five uniform/variable translations needed to port a Shadertoy shader to glslViewer.