drm_fb_clip_offset(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_fb_clip_offset — the Kernel API Manual, bestie edition ✨

Okay so this one is a kernel API page (drm_fb_clip_offset(9), section 9, in case you were wondering 🎀) and it's literally about one tiny but iconic job: figuring out the byte offset of your clipping rectangle inside a framebuffer. That's it, that's the whole vibe. Lowkey obsessed with how specific it is. 🦋

✨ NAME ✨

drm_fb_clip_offset — returns the clipping rectangle's byte-offset in a framebuffer 🫶

🌸 SYNOPSIS 🌸

unsigned int drm_fb_clip_offset (unsigned int pitch , const struct
drm_format_info *format , const struct drm_rect *clip );

💖 ARGUMENTS 💖

  • pitch — the framebuffer's line pitch, in bytes. Yes, bytes, not pixels, don't come for me 😭
  • format — the framebuffer format, aka the const struct drm_format_info * you're passing in
  • clip — the clip rectangle, aka the const struct drm_rect * in question

🦋 RETURN 🦋

It gives you back the byte offset of the clip rectangle's top-left corner within the framebuffer. That's the whole return value, no cap. ✨

🎀 SEE ALSO 🎀

First up, the kernel file itself lives right here:

  • ./drivers/gpu/drm/drm_format_helper.c 👑

And then the whole friend group, in order, because we do not skip anyone in this house 💅:

Not me listing all 24 of these bad boys because every single reference deserves its moment 🌈 no skipping, periodt.

And that's the page, bestie! 💜 Shoutout to the ./drivers/gpu/drm directory for hosting all this, dated October 2026 — go forth and clip those rectangles, you absolute main character 👑✨

📦 where this page comes from