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Bug 5083 - Add an ability to setup a float-point depth buffer
Summary: Add an ability to setup a float-point depth buffer
Status: NEW
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: don't know
Hardware: All All
: P2 API change
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-04-11 06:35 UTC by Andrei Kortunov
Modified: 2020-06-26 11:54 UTC (History)
1 user (show)

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Description Andrei Kortunov 2020-04-11 06:35:45 UTC 
As I understood, by default SDL uses a 16-bits depth buffer, with ability to setup something like GL_DEPTH24_STENCIL8 via such command:

SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);

Unfortunately, 24-bits depth buffer precision is still not enough for open-world games. Is it possible to setup a float-point depth buffer via SDL, a GL_DEPTH_COMPONENT32F, or maybe even GL_DEPTH32F_STENCIL8? If it is not, it would be nice to have such ability.
Comment 1 psi29a 2020-06-26 11:54:05 UTC 
I would like to second this request. 

OpenMW[1] would really benefit from having more depth buffer precision. It would all but eliminate an issue we are having with z-fighting[2].

I'm sure other software that use libsdl would benefit from this.

Cheers,
Bret Curtis


[1] https://openmw.org/
[2] https://en.wikipedia.org/wiki/Z-fighting