On 2014/08/24 10:53, Robert Goulet wrote:
> It is supported by my browser. So basically I can just call
> glDrawBuffers and it should just work? Thank you.
>
In WebGL, extensions must be enabled before use otherwise errors will be
raised. WEBGL_draw_buffers is obviously a WebGL extension.
If Emscripten wishes to support use of WebGL extensions via glGetString
& eglGetProcAddress, a call to glGetString(GL_EXTENSIONS) would have to
both return the results of a call to ctx.getSupportedExtensions and it
would have to enable every extension by calling ctx.getExtension and
save the returned interfaces somewhere. It would also have to do a lot
of other magic to convert the enums and functions of an extension to
storedInterface.anextension.enum and storedInterface.anextension.func
respectively.
I do not know what Emscripten is doing but enabling all extensions seems
like unreasonable overhead for most apps as the number using all
extensions can probably be counted on the fingers of one hand. Providing
an equivalent to getExtension seems like a better idea, though I'm not
sure how to present that in c.
Regards
-Mark
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