Hardware

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Shader Type "highp" Precision

List of derived precision for each numeric type in both Vertex and Fragment shader programs as well as when that field is stored as a struct member in each program type.

	VS	VS Struct	FS	FS Struct
Float Precision	-	-	-	-
Int Bits	-	-	-	-
Uint Bits	-	-	-	-

Floating Point Test Pattern

Shader floating point precision test program from Youi labs. See here for details.

Note that when the "Round to Nearest fix" checkbox is ticked some shader compilers can optimize the operations resulting in precision artifacts away causing in the canvas looking like a complete set of smooth gradients.

with "Round to Nearest" fix

See GitHub repo for more information.