[Mesa-dev] [PATCH 20/23] mesa: remove last of MAX_WIDTH, MAX_HEIGHT

[Brian Paul]

On 02/21/2012 02:22 AM, Jose Fonseca wrote:
> Your series is a huge step forward already.  But I wonder if we could go just a bit further and not add MAX_VIEWPORT_WIDTH/HEIGHT and MAX_RENDERBUFFER_SIZE defines.
>
> Would it be possible to derive these limits from the maximum texture size? Either the driver reported max texture size, or just define them in terms of MAX_TEXTURE_LEVELS so that there are less places to change next time we need to bump them.
>
> Alternatively, we could set them to zero, and later assert that the driver fill them correctly. I'm actually surprised that no driver actually sets them. Granted, viewport can be bigger than the maximum texture size, but there is no guarantee is there that old hardware drivers won't get broken next time we need to bump this to suite a new hardware.

I considered defining the max viewport size and renderbuffer size in 
terms of the max texture size but I wan't sure if that's typically 
true for most hardware.  As you said, the max viewport size could be 
larger than max texture/surface size, for example.

I guess I'd like to just leave it as-is for now so I can wrap up this 
series.  It'd be easy to change later.

I noticed that the gallium state tracker isn't setting the max 
viewport or renderbuffer size values in st_extensions.c.  We could set 
those to the max texture size for the time being...

-Brian