SDL2 Android vulkan question

[Danny Arends]

On Sunday, 2 May 2021 at 13:43:11 UTC, evilrat wrote:
> On Sunday, 2 May 2021 at 12:35:51 UTC, evilrat wrote:
>> On Sunday, 2 May 2021 at 08:58:30 UTC, Danny Arends wrote:
>>
>>> Any thoughts on why loading the Vulkan library using SDL2 
>>> would not work ?
>>> thoughts in general about the process ?
>>
>> Just few tips.
>> GC "crashes" since you have custom main, D default main has 
>> runtime initialization code so it "just works", in you custom 
>> main function try to do this before any call to D code.
>>
>
> Oops, nevermind. I thought you've missed runtime initialization 
> at all but you have rt_init.
> In that case you can try disable parallel collection, or it 
> could be a bug.
>
> https://dlang.org/spec/garbage.html#gc_config
> https://dlang.org/spec/garbage.html#gc_parallel
>
>> As for SDL2, are you sure it was built with Vulkan support?
>> Do you have any other Vulkan apps to test if it actually 
>> supported by your device?
>
> SDL2 docs also says vulkan load library should be called only 
> after you created window surface. It is hard to say from 
> provided code if you have that too.
>

Yeah, it's tricky to create an SDL window sometimes, like on 
android SDL_CreateWindow not being allowed to have it 
SDL_WINDOWPOS_CENTERED

I thought they meant use it like after SDL_Init(), but before you 
create the window. I think the function pointer might not be 
loaded since the SDL_Init returns a which means 2.0.1 for some 
reason.

I think something is going wrong and nothing is doing a dlopen() 
on vulkan.so

> Anyway, I might try to look at this next weekend. Do you have 
> this project available on github/google drive?

well it's just a bunch of files atm, but with a serious 
dependency chain, I'll try to minimize it. Guess for now the 
deprecated openGL has to be the fallback