Hi Sam, Thanks for replying. When I have time I will try the Emscripten way. I will let you know how I go.
On Tue, 6 Sept 2022, 4:57 am 'Sam Clegg' via emscripten-discuss, < [email protected]> wrote: > > > On Fri, Sep 2, 2022 at 5:46 AM Andrew Lay <[email protected]> wrote: > >> Hi Sam, >> Thank you for your quick response. >> >> I have seen the struct params that you speak of, but all of the examples >> that I have seen relate to GLES2 C api. For example I looked at >> 'webgl_draw_triangle.c' example file in the Emscripten folder. >> >> When I saw the complexity of the library, I thought it seemed like >> overkill for what I wanted to do, simply draw a buffer of rgba values to a >> canvas. >> >> This is why I tried to call the ordinary JavaScript API from an >> Emscripten PThread. See here: >> https://github.com/alayGit/DummyEmscriptenCanvasForumExample/blob/main/Emscripten/EmscriptenCanvasWorker.cpp >> >> I am wasting my time trying to do things this way? >> > > I would stick to using the emscripten opengl implementation, unless you > really know what you are doing and want to get into the weeds. Otherwise, > you likely end up running into issues that emscripten has already solved in > its implementation. I imagine this is one of those cases but I'm not an > expert on this part of the code. > > > >> Should I use the GLES2 library, or are the things you pointed me too and >> the stuff in the draw triangle example needed for the JavaScript API method >> too? >> >> On Fri, Sep 2, 2022 at 10:01 PM 'Sam Clegg' via emscripten-discuss < >> [email protected]> wrote: >> >>> Seems likely related to `explicitSwapControl`, >>> `renderViaOffscreenBackBuffer` and `proxyContextToMainThread` which are >>> part of `EmscriptenWebGLContextAttributes`: >>> >>> https://emscripten.org/docs/api_reference/html5.h.html?highlight=gamepad#c.EmscriptenWebGLContextAttributes.explicitSwapControl >>> >>> Have you read the documentation related to those? >>> >>> >>> >>> On Fri, Sep 2, 2022 at 4:14 AM Andrew Lay <[email protected]> >>> wrote: >>> >>>> Can someone please help with out? >>>> >>>> I am having trouble correctly drawing to Canvas on Pthreads. >>>> >>>> There is nothing being drawn to the canvas on the screen while the >>>> application is running, however if I freeze the code with the Dev tools in >>>> the debugger the Canvas updates. >>>> >>>> I have created an example in this git hub repo: >>>> >>>> https://github.com/alayGit/DummyEmscriptenCanvasForumExample >>>> >>>> It is not pretty but I hope it will demonstrate the issue. >>>> >>>> If anything is not clear please let me know. >>>> >>>> >>>> >>>> >>>> -- >>>> 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]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/emscripten-discuss/94127203-44fc-45f5-9fcc-402a231b49e9n%40googlegroups.com >>>> <https://groups.google.com/d/msgid/emscripten-discuss/94127203-44fc-45f5-9fcc-402a231b49e9n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "emscripten-discuss" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/emscripten-discuss/ie7N7EL1atk/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_b7L7AtRNzOKiH9V4L4HbHc-TxBzf7Sq2c8iy0xzqL9Q%40mail.gmail.com >>> <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_b7L7AtRNzOKiH9V4L4HbHc-TxBzf7Sq2c8iy0xzqL9Q%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> 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]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/emscripten-discuss/CAC9WJu0NLw9uOFE_k_mzsqMYu8ixSCe3duww6EcqjS9CwhLCCg%40mail.gmail.com >> <https://groups.google.com/d/msgid/emscripten-discuss/CAC9WJu0NLw9uOFE_k_mzsqMYu8ixSCe3duww6EcqjS9CwhLCCg%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "emscripten-discuss" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/emscripten-discuss/ie7N7EL1atk/unsubscribe > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_2MC9m7xxn_O-FnmaSzGK0BzVHgoe8V7y-OcnUzLTGUg%40mail.gmail.com > <https://groups.google.com/d/msgid/emscripten-discuss/CAL_va2_2MC9m7xxn_O-FnmaSzGK0BzVHgoe8V7y-OcnUzLTGUg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. 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