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Re: [Public WebGL] Shader reload.



Ah - yes, I snipped the shader loader code from one of the example
progs...thanks - that clears that one up.  (I think I'll just embed my
shader sources as string constants in the JavaScript and avoid the whole
messy issue).

  -- Steve


Vladimir Vukicevic wrote:
> Whoops, hit send too soon.
>
> If you're using XMLHttpRequest to load shader data via GET requests, the browser is likely caching the results -- you'll have to either send cache headers from the server, e.g.:
>
>  Cache-Control: no-cache, must-revalidate
>  Pragma: no-cache
>
> and/or add an If-Modified-Since header to the request with a time in the past.  Reload/Shift-Reload won't make any difference here, because that only applies to the resources in use by the page itself, and not any network requests it might make.
>
>     - Vlad
>
> ----- Original Message -----
>   
>> I've had a growing suspicion (which I finally verified today) that
>> sometimes Firefox/Minefield does not reload shader files via HTTP when
>> you force a reload - either by clicking on the Reload icon with the
>> shift-key held down - or by typing Ctrl+Shift+R. Several times now
>> I've uploaded a new shader file onto the server and the browser has
>> continued to use the old one - even after forcing a reload. The only
>> thing that seems to un-wedge it is to clear the shader cache.
>>
>> I have no special reload directives in my HTML file - and I'm loading
>> shaders using:
>>
>> var shader = gl.createShader(type);
>> gl.shaderSource ( shader, shaderSrc ) ;
>> gl.compileShader ( shader ) ;
>>
>> I've definitely seen it happen several times with Vertex shaders...I'm
>> not 100% sure whether I've seen it with Fragment shaders or not. HTML
>> and JS files reload just fine - and I haven't noticed issues with
>> textures.
>>
>> -- Steve
>>
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