Re: Shader coders?

[Michael Sheldon <mike mikeasoft com>]

Hi Pierre,

Pierre-Luc Beaudoin wrote:
> To blur the shadow of markers, I though we could use a shader.  Well, I
> don't have that knowledge or the time to learn how to write them :)
 I'm not sure that a shader is really the way to go here, besides the 
complexity of doing it you'd also be drastically limiting the platforms 
that libchamplain can work on. A number of free graphics drivers (most 
notably the intel ones) only have very limited/no shader support. Also 
the OpenGL|ES 1.x specification doesn't make any provision for shaders 
as far as I'm aware (2.0 does, but I don't think this is widely 
implemented in hardware yet).

 I haven't looked at the code/feature in question yet, so I could be 
mistaken with my assumptions, but why not just use a pre-blurred shadow 
image (in a similar way to google maps)?

Cheers,
 Mike.