have you tried something like this?
#ifdef EMSCRIPTEN
char req[] = "var ctx = Module.canvas.getContext('experimental-webgl');\n"
"if(ctx.getExtension('WEBKIT_WEBGL_depth_texture') != NULL) return 1;\n"
"else if (ctx.getExtension('MOZ_WEBGL_depth_texture') != NULL) return
1;\n"
"else return 0;\n";
int res = emscripten_run_script(req);
#endif
WebGL extensions must be activated with getExtension() before being used...
On Wednesday, January 15, 2014 7:13:39 AM UTC+1, Bram Stolk wrote:
>
> My emscripted OpenGL-ES2 game fails to create a depth texture.
> The extension is supported on my machine, yet:
>
> I try to create the depth texture with:
> glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, SHADOWBUFFERSIZE,
> SHADOWBUFFERSIZE, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, depthbuffermem );
>
> This results in:
> GL_INVALID_OPERATION
>
> I guess it could be a limit of WebGL not supporting depth textures?
> Or could it be something emscripten does not tolerate?
>
> I use firefox to load the HTML created with ASM_JS=1.
> Also, my frag+vert GLSL shaders get compiled and linked just fine.
>
> My OpenGL context is created via SDL:
> SDL_Surface* screen = SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL );
>
> Thx,
>
> bram
>
>
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