Worked :) Thanks, again
2016-09-02 8:55 GMT+02:00 Harold Comere <[email protected]>: > Thanks for the hint :) > > makeContextCurrent: function(contextHandle) { >> var context = GL.contexts[contextHandle]; >> if (!context) return false; >> GLctx = Module.ctx = context.GLctx; // Active WebGL context object. >> GL.currentContext = context; // Active Emscripten GL layer context >> object. >> return true; >> }, > > > Should i understand : > * GL is a global object > * GL contains all created contextes, referenced by their handle > > Therefore i should be able to : > * Use EMSCRIPTEN_WEBGL_CONTEXT_HANDLE > <https://kripken.github.io/emscripten-site/docs/api_reference/html5.h.html#c.EMSCRIPTEN_WEBGL_CONTEXT_HANDLE> > emscripten_webgl_get_current_context() in C++ side to get context handle > * Inform my JS library about the current context handle > * Retrieve from my JS library the current WebGLRenderingContext thantks to > the handle > > Am i right ? > > Regards, > Harold > > > 2016-09-01 18:39 GMT+02:00 Alon Zakai <[email protected]>: > >> Look in src/library_gl.js (makeContextCurrent), I believe the GL context >> is stored in Module.ctx. >> >> On Thu, Sep 1, 2016 at 2:24 AM, Harold Comere <[email protected]> >> wrote: >> >>> Hi, >>> >>> I am trying to grab HTML5 video/webcam frames into a WebGL texture. >>> >>> Old threads demonstrate that it is straightforward to do it in pure JS : >>> >>> * https://github.com/kripken/emscripten/issues/1434#issuecomme >>> nt-48155712 >>> * https://groups.google.com/forum/#!searchin/emscripten-disc >>> uss/video|sort:relevance/emscripten-discuss/eKNQofq-d0E/V2sok6GoQUMJ >>> >>> I my case, the WebGL context is created using native OpenGLES 2.0 API >>> and i have an embedded JS library which is responsible of all getUserMedia >>> stuff. >>> Therefore i need to retrieve the current WebGLRenderingContext object >>> from my JS library code to be able to call texImage2D with video element as >>> pixel source. >>> >>> After some researches, i was not able to find out how to do it :( >>> >>> Does anyone has insights about how to retrieve the current >>> WebGLRenderingContext from JS ? >>> >>> Regards, >>> Harold >>> >>> >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "emscripten-discuss" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "emscripten-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
