drm_rect_calc_vscale(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_rect_calc_vscale(9) — like, the vertical scale girlie ✨

okay so bestie, this one lives in the Kernel API Manual and it's literally the vertical-scaling cousin of drm_rect_calc_hscale(9). she's giving "i do one thing and i do it well" energy and honestly? respect. 🎀

🌸 NAME 🌸

drm_rect_calc_vscale — calculate the vertical scaling factor 💖

✨ SYNOPSIS ✨

int drm_rect_calc_vscale (const struct drm_rect *src , const struct
       drm_rect *dst , int min_vscale , int max_vscale );

🫶 ARGUMENTS 🫶

  • src — the source window rectangle, aka where you're coming from 🦋
  • dst — the destination window rectangle, aka where you're going to ✨
  • min_vscale — the minimum allowed vertical scaling factor (the floor, the boundary, the "bestie no further" line) 🙈
  • max_vscale — the maximum allowed vertical scaling factor (the ceiling, the "okay that's enough" line) 🔥

🌈 DESCRIPTION 🌈

so the way this works is it calculates the vertical scaling factor as (src height) / (dst height). simple. iconic. no cap. 👑

and then there's the rounding rules, which like — pay attention, this is the main character part:

  • if the scale is below 1 << 16, it rounds down 💀
  • if the scale is above 1 << 16, it rounds up ⬆️

the reason is highkey clever: this will calculate the scale with the most pessimistic limit calculation. she's not being dramatic, she's being safe fr fr. 🧚

⭐ RETURN ⭐

returns the vertical scaling factor, or the errno of out of limits. so like, if you went outside the min_vscale/max_vscale bounds, you get an error code instead of a number. vibe check failed, respectfully. 😭

💜 SEE ALSO 💜

go read the whole friend group, they're all slay 🫶

mwah 💋 that's the whole page bestie — brought to you from the fine folks at ./drivers/gpu/drm, dated October 2026, and yeah they really did put the manpage title in the footer too (drm_rect_calc_vscale(9)), which is giving "i said what i said" energy. periodt. 💅✨

📦 where this page comes from