Re: No GLESv1 support on Morty?

[Joshua Watt <jpewhacker@gmail.com>]

On Fri, 2017-12-15 at 16:44 -0600, Joshua Watt wrote:
> Hello,
> 
> I'm attempting to build an application that uses the PVR GLESv1
> libraries (ti-sgx-ddk-um) off of the morty branch. However, it
> appears
> that when I call  eglGetConfigs(), it doesn not return any GLESv1
> compatible configs, and so eglChooseConfigs() failes to find one that
> works. I have printed out the configs that are returned and it looks
> like all of them are GLESv2 only:
> 
> Config 0x1:                       
>         color=8,8,8               
>         alpha=8                   
>         depth=24                  
>         type=(0x4) GLESv2         
> Config 0x2:                       
>         color=8,8,8               
>         alpha=8                   
>         depth=0                   
>         type=(0x4) GLESv2         
> Config 0x3:                       
>         color=8,8,8               
>         alpha=8                   
>         depth=24                  
>         type=(0x4) GLESv2         
> Config 0x4:                       
>         color=8,8,8               
>         alpha=0                   
>         depth=24                  
>         type=(0x4) GLESv2         
> Config 0x5:                       
>         color=8,8,8               
>         alpha=0                   
>         depth=0                   
>         type=(0x4) GLESv2         
> Config 0x6:                       
>         color=8,8,8               
>         alpha=0                   
>         depth=24                  
>         type=(0x4) GLESv2         
> Config 0x7:                       
>         color=5,6,5               
>         alpha=0                   
>         depth=24                  
>         type=(0x4) GLESv2         
> Config 0x8:                       
>         color=5,6,5               
>         alpha=0                   
>         depth=0                   
>         type=(0x4) GLESv2         
> Config 0x9:                       
>         color=5,6,5               
>         alpha=0                   
>         depth=24                  
>         type=(0x4) GLESv2
> 
> I made sure I was linking against libGLES_CM and libEGL (but *not*
> libGLESv2). I beleive this same code worked on the daisy branch.
> 
> Is there something I'm missing to enable GLESv1 support?

I think I figured this out. libGLES_CM.so was missing on the filesystem
(even though the libGLES_CM.so.1 symlink and actualy .so library were
present). Apparently this symlink is required in order for the EGL
implementation to report that it support GLESv1. See:

https://lists.yoctoproject.org/pipermail/meta-ti/2017-December/010565.h
tml

> 
> Thank,
> Joshua Watt