GL_GLOBALINVOCATIONI(3G)

📦
version 1.1 · 7 versions
, in centos-stream 9

💅 NAME 💅

okay bestie, welcome to the <pink>GL_GLOBALINVOCATIONI(3G)</pink> page — yes, that's the manual name, and we're diving in. This one is all about gl_GlobalInvocationID, which contains the global index of the work item currently being operated on by a compute shader. it's giving "where am I in the whole grid?" energy, and honestly? iconic.

🌸 DECLARATION 🌸

the declaration is literally this, bestie:

in uvec3 gl_GlobalInvocationID ;

✨ DESCRIPTION ✨

In the compute language, gl_GlobalInvocationID is a derived input variable that contains the n-dimensional index of the work invocation within the global work group that the current shader is executing on. no cap, that's the whole vibe.

The value of gl_GlobalInvocationID is equal to:

gl_WorkGroupID * gl_WorkGroupSize + gl_LocalInvocationID

so yeah, it's literally the math doing its little main character thing 💅.

🦋 VERSION SUPPORT 🦋

okay so the version support tea ☕, presented without a table because we're cute like that:

  • Variable Name: gl_GlobalInvocationID
  • OpenGL Shading Language Version support check:
    • 1.10 — -
    • 1.20 — -
    • 1.30 — -
    • 1.40 — -
    • 1.50 — -
    • 3.30 — -
    • 4.00 — -
    • 4.10 — -
    • 4.20 — -
    • 4.30 — ✔
    • 4.40 — ✔
    • 4.50 — ✔

so the listed values are - from 1.10 to 4.20, and ✔ at 4.30, 4.40, and 4.50. slay.

🎀 SEE ALSO 🎀

  • gl_NumWorkGroups()
  • gl_WorkGroupID()
  • gl_WorkGroupSize()
  • gl_LocalInvocationID()

go read those too, bestie — iykyk 🫶

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.

Copyright © 2012-2014 Khronos Group

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