GLUTSWAPBUFFERS(3)

✨ GLUTSWAPBUFFERS(3) ✨

okay so bestie, welcome to the OpenGLUT window manual 💖 this one's about glutSwapBuffers — the iconic lil function that swaps the buffers for the current window. it lives in the OpenGLUT - window section, and honestly? she's the moment. no cap. 🫶

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🌸 SYNOPSIS 🌸

#include <openglut.h>

void
glutSwapBuffers(void);

like yes, that's the whole vibe. one function, no args, no drama. 💅

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🦋 DESCRIPTION 🦋

so basically this function is you signalling to OpenGLUT that you're done drawing to the current window — for now, bestie, just for now. 🎀

and then here's the slay: if your window is double-buffered (that's the GLUT_DOUBLE param you'd pass to glutInitDisplayMode()), OpenGLUT will swap the front buffer with the back buffer. front goes back, back goes front, it's giving choreography. ✨

this also computes your current frame-rate and prints the result on stderr if it's indicated by the GLUT_FPS environment variable. 🍓

heads up though — that computed value is not necessarily the total frame rate, if you have multiple windows, because the statistic is the total number of buffer-swaps for the entire program. so like, it's a group project stat, not a solo stat. 😭

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💀 CAVEATS 💀

• this function has no effect if your window is GLUT_SINGLE. literally nothing happens. it's giving ghosted. 🙈
• frame rate is only calculated for double-buffered windows.

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🧚 TODO 🧚

• how does this interact with overlays? genuinely asking, the mystery remains. 👀
• consider making GLUT_FPS keep per-window stats in a multi-window program. (the group chat has been asking for this fr fr.)

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👑 SEE ALSO 👑

• glutPostRedisplay(3)
• glutPostOverlayRedisplay(3)
• glutPostWindowRedisplay(3)
• glutPostWindowOverlayRedisplay(3)
• glutInitDisplaymode(3)

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and that's the page, bestie!! this one's stamped UNDATED and the source/version line is just... UNTITLED() 😭 which is honestly the most mysterious main character energy imaginable — no date, no title, just vibes. go swap some buffers, you got this. 💖✨🎀🦋