Whoa! Still incomplete frame buffer?
It seems the work around I put in does not always work.
Anyways... I thought a little more on this depth buffer issue.
I think it may actually be an emscripten bug, not a browser bug.
The problem is that some platforms (like windows) need:
glDrawBuffer( GL_NONE );
glReadBuffer( GL_NONE );
When using a depth only texture.
When using emscripten, this compiles, but will not link due to missing
symbols.
BTW: glDrawBuffer and glReadBuffer are part of OpenGL, but missing in ES2.
I don't know which one is used with SDL, but if emscripten can use these
calls, I think the issue will be solved.
/home/bram/src/emscripten/em++ -DJS -DLANDSCAPE -s ASM_JS=1
-Wno-warn-absolute-paths -I../Models.game/geom -I../Models.editor/geom
-I../../Base/C -I../Editor/C -I../PI -I../PI/WorldObjects
-I../PI/VehicleObjects -I../Android/Game -I/home/bram/src/opende/include
-I/home/bram/include -g -Wall -Wno-missing-braces -MMD -MP -DDEBUG -DdDEBUG
-O1 -o bin/tlctc.html src/main.cpp \
-lgame -lpi -led -lvehicleobjects -lworldobjects -lbase -lode -L.
-L/home/bram/src/opende.js/ \
-s TOTAL_MEMORY=67108864 \
--preload-file Sounds@ \
--preload-file Textures@ \
warning: unresolved symbol: glReadBuffer
warning: unresolved symbol: glDrawBuffer
warning: unresolved symbol: nextafterf
bram@Ubuntu64:~/apps/LittleCrane/JS$
Lastly: yes, -O1 is used.
For my future builds, I will switch to -O2.
Thx,
Bram
On Sat, Jan 25, 2014 at 9:35 AM, Alon Zakai <[email protected]> wrote:
> You should use enough TOTAL_MEMORY for the app, if that value is
> sufficient for it to run then no more is needed.
>
> I see unminified function names in the generated code, so I think this is
> an -O1 or -O0 build, and not -O2?
>
> I get a webgl error,
>
> Error: WebGL: Retrieving a WebGL context from a canvas via a request id
> ('webgl') different from the id used to create the context
> ('experimental-webgl') is not allowed. tlctc.js:6097
> Error: WebGL: getExtension('MOZ_WEBGL_depth_texture'): MOZ_ prefixed WebGL
> extension strings are deprecated. Support for them will be removed in the
> future. Use unprefixed extension strings. To get draft extensions, set the
> webgl.enable-draft-extensions preference. tlctc.js:6100
> null tlctc.js:6101
> [object WebGLExtensionDepthTexture] tlctc.js:6102
> Error: WebGL: clear: incomplete framebuffer tlctc.js:6606
> uncaught exception: Assertion failed: err == GL_NO_ERROR, at:
> ../Android/Game/ctrl.cpp,550,ctrl_drawShadow at stackTrace@
> http://stolk.org/tlctc/js-uncompressed/tlctc.js:1264
> ___assert_fail@http://stolk.org/tlctc/js-uncompressed/tlctc.js:6558
> Runtime.dynCall@http://stolk.org/tlctc/js-uncompressed/tlctc.js:693
> Browser_mainLoop_runner@
> http://stolk.org/tlctc/js-uncompressed/tlctc.js:6133
>
> - Alon
>
>
>
> On Sat, Jan 25, 2014 at 9:31 AM, Bram Stolk <[email protected]> wrote:
>
>> OK,
>>
>> Uncompressed version, with browser fix that avoids depth-only textures,
>> at:
>>
>> http://stolk.org/tlctc/js-uncompressed/
>>
>> It runs on my HD3000 MacBook Air now :-)
>> Albeit slowly due to the crappy GPU in that machine.
>>
>> It's really big though: 16mb js, 24 mb data, so be patient.
>>
>> Should I have used a larger value than -s TOTAL_MEMORY=67108864 ?
>>
>> Bram
>>
>>
>>
>> On Sat, Jan 25, 2014 at 9:18 AM, Alon Zakai <[email protected]> wrote:
>>
>>> I get an out of memory error or my machine when trying to run it.
>>>
>>> Is it fully optimized (-O2)?
>>>
>>> Perhaps related to compression, any chance you can put up a version
>>> without the lzma compression?
>>>
>>> - Alon
>>>
>>>
>>>
>>> On Sat, Jan 25, 2014 at 1:16 AM, Bram Stolk <[email protected]> wrote:
>>>
>>>> Sure,
>>>>
>>>> I will keep a permanent copy at http://stolk.org/tlctc/bugrep/
>>>>
>>>> Does the browser completely crash?
>>>>
>>>> On OSX, the javascript bails on an assert because the framebuffer is
>>>> incomplete.
>>>> I use a depth-only texture, which Version 32.0.1700.77 chrome does not
>>>> like.
>>>>
>>>> I tried adding glDrawbuffer( GL_NONE ) but this symbol is undefined
>>>> during linking?
>>>> Does emscripten link against GL or GLES2 when I build sdl sources?
>>>>
>>>> Bram
>>>>
>>>>
>>>>
>>>> On Sat, Jan 25, 2014 at 1:04 AM, Jukka Jylänki <[email protected]>wrote:
>>>>
>>>>> Hey, I manage to consistently crash Firefox Nightly on this - could
>>>>> you freeze this exact version of the page to some location that stays
>>>>> alive? I'm going to submit a crash report about this.
>>>>>
>>>>> Jukka
>>>>>
>>>>>
>>>>> 2014/1/25 Bram Stolk <[email protected]>
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>
>>>>>> Here's the first version of the emscripted port of my Crane Simulator:
>>>>>> "The Little Crane That Could."
>>>>>>
>>>>>> http://stolk.org/tlctc/js/
>>>>>>
>>>>>> Use arrow keys to drive truck, and on screen levers to control the
>>>>>> crane.
>>>>>> Drag mouse for camera control, +/- to zoom.
>>>>>>
>>>>>> If you try it out, please let me know your findings.
>>>>>> The decompression is rather slow (slower than the download) but the
>>>>>> files are nicely compacted.
>>>>>>
>>>>>> I'm amazed by what emscripten is able to do for me. (Pretty much
>>>>>> everything I do in C, except the UDP sockets.)
>>>>>>
>>>>>> Keep up the good work!
>>>>>>
>>>>>> Bram
>>>>>>
>>>>>> --
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>>>>>
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>>>>
>>>>
>>>> --
>>>>
>>>> "Programming today is a race between software engineers striving to
>>>> build bigger and better idiot- proof programs, and the Universe trying to
>>>> produce bigger and better idiots. So far, the Universe is winning." (R
>>>> Cook).
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>> "Programming today is a race between software engineers striving to build
>> bigger and better idiot- proof programs, and the Universe trying to produce
>> bigger and better idiots. So far, the Universe is winning." (R Cook).
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