STRUCT VC4_TEXTURE_SAMPLE_INFO(9)

💜 struct vc4_texture_sample_info(9) 💜

okay so bestie, welcome to the Kernel API Manual ✨ — this one's a lil struct page from the kernel docs and it's basically the receipts for where your texture setup params live inside the UBO 🎀

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🌸 NAME 🌸

struct vc4_texture_sample_info — it saves the offsets into the UBO for texture setup parameters. that's it, that's the whole job 💅

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✨ SYNOPSIS ✨

struct vc4_texture_sample_info {
    bool is_direct;
    uint32_t p_offset[4];
 };

(no cap, that trailing brace is indented exactly like that in the source, we don't touch it 🫶)

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🦋 Members 🦋

so the struct's got two things in it:

• is_direct — a bool, sitting right there in the struct 💖
• uint32_t p_offset[4] — an array of four uint32_t, the actual offsets 👑

the page doesn't hand out a separate lil blurb for each member — the whole vibe lives in the Description, so scroll down bestie ⬇️

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💀 Description 💀

okay so here's the tea 🔥 this struct gets used at draw time to relocate the reference to the texture contents in p0, and to validate that the offset — combined with width/height/stride/etc. from p1 and p2/p3 — doesn't sample outside the BO. like, it's a vibe check for your memory bounds, literally 🧚

and here's the iconic part: the hardware treats unprovided config parameters as 0, so not all of them need to be set up for every texture sample. so the code just stores ~0 as the offset to mark the unused ones. clever, ate, no notes 💅✨

if you want the actual definitions of the texture parameters, go read the VC4 3D architecture guide page 41 ("Texture and Memory Lookup Unit Setup") — that's where the real lore is 📖🌈

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🎀 SEE ALSO 🎀

• Kernel file ./drivers/gpu/drm/vc4/vc4_drv.h struct vc4_validated_shader_info(9)
• __wait_for(9)

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and that's the whole page bestie, you understood it, slay 🌟 this came to you from ./drivers/gpu/drm/vc4, dated October 2026, in the Kernel API Manual — mwah, go sample some textures responsibly 💖🎀🦋