Add interface to set BT.709 as YUV to RGB conversion

[SDLBugzilla]

This bug report was migrated from our old Bugzilla tracker.

Reported in version: 2.0.8
Reported for operating system, platform: Windows (All), x86_64

Comments on the original bug report:

On 2018-04-03 13:48:44 +0000, hongruichen wrote:

Thera are two YUV to RGB conversions:
1.BT.601 which is use for SDTV
2.BT.709 which is use for HDTV (720p or 1080p etc.)

Can we add some switch to change the conversion in shader?

https://en.wikipedia.org/wiki/YUV#Full_swing_for_BT.601
http://www.equasys.de/colorconversion.html

On 2018-04-09 18:30:34 +0000, Sam Lantinga wrote:

You mean something like SDL_SetYUVConversionMode()? :)
https://hg.libsdl.org/SDL/file/default/include/SDL_surface.h#l526

On 2018-04-10 02:46:45 +0000, hongruichen wrote:

Yes, and which release wil include this change?

On 2018-04-10 14:26:02 +0000, Sam Lantinga wrote:

2.0.8 already has this change.