SDL_DownloadFromGPUBuffer(3)

💖 NAME 💖

ok so SDL_DownloadFromGPUBuffer — bestie, this one copies data from a buffer over to a transfer buffer, and it does it on the GPU timeline ✨ It lives in the SDL3 FUNCTIONS family, which is giving main character energy fr fr 👑

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🦋 SYNOPSIS 🦋

#include <SDL3/SDL_gpu.h>

void SDL_DownloadFromGPUBuffer(
    SDL_GPUCopyPass *copy_pass,
    const SDL_GPUBufferRegion *source,
    const SDL_GPUTransferBufferLocation *destination);

like, look at her. so clean. so iconic 💅

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🌸 DESCRIPTION 🌸

Okay so here's the tea 🍵 — this function gets that data from a buffer into a transfer buffer, on the GPU timeline, no cap.

But listen, and this is the important part: this data is not guaranteed to be copied until the command buffer fence is signaled 😭 Like, don't go reading it early and then act surprised, bestie. Wait for the fence. Periodt.

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🎀 FUNCTION PARAMETERS 🎀

• copy_pass — a copy pass handle, aka the lil ticket that says "yeah we're doing a copy right now" 🎫
• source — the source buffer, with its offset and size. she's the one being read from, the giver, the generous queen 👑
• destination — the destination transfer buffer, with its offset. she's the receiver, catching all that data 🫶

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⭐ AVAILABILITY ⭐

This function is available since SDL 3.2.0. so if you're on something older... girl. upgrade. 🙈

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okay and one last thing before you go — this lil page came from Simple Directmedia Layer, running SDL 3.4.18, and it's the SDL_DownloadFromGPUBuffer(3) era of life 🌈 so go forth, wait for that fence, and slay 💖✨🎀