Re: [AD] More default shaders

[Trent Gamblin <nooskewl@xxxxxxxxxx>]

If the shader addon gets moved into the core, something like this would still belong in an addon. Undecided on whether I even like it in an OFFICIAL addon but I wouldn't lose sleep over it.

Trent

On 2013-02-22, at 7:02 PM, SiegeLord <slabode@xxxxxxxxxx> wrote:

> I think the shaders are a very cool concept but are hard for newbies to 
> start with. I think the shader addon should provide a whole slew of 
> default shaders for nice effects with an easy API that doesn't leak the 
> implementation details (like the current al_get_glsl_*_shader do). 
> Something that would recapitulate the effects you could get in A4 using 
> the blenders (see 
> http://alleg.sourceforge.net/stabledocs/en/alleg020.html for a list), 
> but possibly add a number of other useful ones, like blurring or glass.
> 
> One simple API idea would be to just do this:
> 
> ALLEGRO_SHADER* al_create_default_shader();
> ALLEGRO_SHADER* al_create_light_shader();
> //etc
> 
> After being created, the user would interact with the shader the usual 
> way (the various variables, such as colors, will be set using the 
> uniform setting syntax we already have).
> 
> It might be interesting to simplify that even further and mimic the A4 
> API more accurately (ignore the names, no thought was put into them):
> 
> ALLEGRO_EFFECT_STATE* al_create_effect_state();
> 
> al_use_default_effect(ALLEGRO_EFFECT_STATE* state);
> al_use_light_effect(ALLEGRO_EFFECT_STATE* state, ALLEGRO_COLOR light);
> 
> Obviously this is inflexible, but it is exactly designed for ease of 
> use by beginners. The old API is unaffected by this proposed change 
> (even the al_get_default_glsl_*_shader have their use, just not this 
> use).
> 
> -SL
> 
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