Comment # 3 on bug 74329 from Matt Turner

The Mesa core support was added in this commit:

commit a63c8a524b01e802cf2505099f930c0cb97df0b2
Author: Kalyan Kondapally <kondapallykalyancontribute@gmail.com>
Date:   Wed Jan 7 20:30:25 2015 -0800

    Mesa: Add support for GL_OES_texture_*float* extensions.

    This patch series adds support for following GLES2 Texture Float
extensions:
    1)GL_OES_texture_float,
    2)GL_OES_texture_half_float,
    3)GL_OES_texture_float_linear,
    4)GL_OES_texture_half_float_linear.

Gallium drivers just need to enable the extensions now.