SDL_GetGammaRamp(3)

✨ SDL_GetGammaRamp ✨

okay so bestie, welcome to the SDL API Reference 💖 this one's a lil function called SDL_GetGammaRamp, and it's the one that gets the color gamma lookup tables for the display. yes. that's the whole vibe. let's get into it 🫶

🌸 SYNOPSIS 🌸

#include "SDL.h"

int SDL_GetGammaRamp(Uint16 *redtable, Uint16 *greentable, Uint16
*bluetable);

like, you pull in "SDL.h" first, obviously, and then you hand it three lil pointer besties — one for red, one for green, one for blue — and it fills them in for you 💅

🦋 DESCRIPTION 🦋

So what does it actually do, you ask? It gets the gamma translation lookup tables currently used by the display. That's it, that's the whole thing. It's reading, not writing. It's the "tell me what you've got going on rn" of gamma functions 📖✨

And here's the lil detail that matters, don't skip it: each table is an array of 256 Uint16 values. Two hundred and fifty-six. Not 255, not 1024. 256. and every single entry is a Uint16, so make sure your buffers are actually that big before you pass them in, okay? 😭

🚨 real talk tho: not all display hardware is able to change gamma. So if you're out here expecting every monitor on earth to play along, nope. some of them literally can't, and that's not a you problem, that's a hardware problem 💀

🎀 RETURN VALUE 🎀

• Returns -1 on error.

that's the only documented return value, bestie, so treat anything that isn't an error like a win 🏆 and if you get that -1 back, something went sideways.

👑 SEE ALSO 👑

• SDL_SetGamma
• SDL_SetGammaRamp

go read those two next, they're literally the other half of this whole gamma situation, iykyk 🔥

and that's the page!! mwah 💋 this was the SDL API Reference, dated Tue 11 Sep 2001, 23:01 — yeah, 2001, we're reading vintage lore fr fr 🕰️✨ slay, go forth and gamma-ramp responsibly, queen 🌈👑