[Mesa-dev] [PATCH 1/3] mesa: restrict ES2 from 32-bit blending, add GL_EXT_float_blend

[Ian Romanick]

On 11/02/2015 04:50 PM, Ilia Mirkin wrote:
> GL_EXT_color_buffer_float adds support for float buffers in ES3.0+, but
> explicitly disallows 32-bit blending. However this restriction was never
> implemented in mesa.
> 
> Add the restriction, and also allow a driver to expose
> GL_EXT_float_blend which re-enables the functionality.
> 
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
> 
> Untested... looking for confirmation that this is the right thing to
> do. Will write a piglit if it is.

Some flavor of this probably is the right thing to do.  The question is
whether or not any hardware supported by Mesa can do
GL_EXT_color_buffer_float but not GL_EXT_float_blend... if everyone can
do both or neither, this patch series could be even simpler. :)