This test verifies WebGL texture format support by creating textures with different formats and filtering modes, rendering them, and validating the results.

Tested formats include:

norm16/norm16Linear: 16-bit normalized format with nearest/linear filtering (EXT_texture_norm16)
float/floatLinear: 32-bit floating point with nearest/linear filtering (OES_texture_float_linear)
halfFloat/halfFloatLinear: half float with nearest/linear filtering

WebGL Texture Format Support Test