MEMORYBARRIERBUFFER(3G)

💖 MEMORYBARRIERBUFFER 💖

okay bestie, this one's in section 3G of the manual, and it's genuinely one of those little functions that's doing SO much heavy lifting behind the scenes. let's get into it 🫶

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✨ NAME ✨

memoryBarrierBuffer — controls the ordering of operations on buffer variables issued by a single shader invocation

like… it's the vibe-check enforcer for your buffer variable memory ops, fr fr. one shader invocation, one barrier, zero chaos 💅

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🎀 DECLARATION 🎀

void memoryBarrierBuffer(void);

no args, no return value, no drama. iconic behavior honestly.

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🌸 DESCRIPTION 🌸

so here's the tea: memoryBarrierBuffer waits on the completion of all memory accesses that resulted from the use of buffer variables, and then it just… returns. no other effect. that's it. that's the whole job. 👑

but the way that matters: when this function returns, the results of any modifications to the content of buffer variables will be visible to any access to the same buffer from other shader invocations. slay. 🔥

and specifically — any modifications made in one shader stage are guaranteed to be visible to accesses performed by shader invocations in subsequent stages when those invocations were triggered by the execution of the original shader invocation. (like, for example: fragment shader invocations for a primitive resulting from a particular geometry shader invocation. iykyk 🧚)

no cap, it's giving "i finished writing, now everybody can read." periodt.

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⭐ VERSION SUPPORT ⭐

okay so the function is memoryBarrierBuffer, and here's how the OpenGL Shading Language Version situation is looking, version by version:

• 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 yeah, she didn't show up until 4.30 and then she ATE. ate and left no crumbs 🍓

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💜 SEE ALSO 💜

go read these next, bestie, they're the whole friend group:

• memoryBarrier()
• memoryBarrierImage()
• memoryBarrierShared()
• groupMemoryBarrier()

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🌈 COPYRIGHT 🌈

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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also just a heads up — the source line on this page is literally [FIXME: source], so like, someone left a little to-do in there 😭 not me being the one to tell you.

and that's the page!! dated 01/03/2018, which is giving vintage but make it functional 💅 thanks for reading to the end, you're the main character, mwah 🎀💖✨