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Batch GPU uploads to eliminate per-upload fence waits (stutter fix)

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Every uploadBuffer/VkTexture::upload called immediateSubmit which did a
separate vkQueueSubmit + vkWaitForFences. Loading a single creature model
with textures caused 4-8+ fence waits; terrain chunks caused 80+ per batch.

Added beginUploadBatch/endUploadBatch to VkContext: records all upload
commands into a single command buffer, submits once with one fence wait.
Staging buffers are deferred for cleanup after the batch completes.

Wrapped in batch mode:
- CharacterRenderer::loadModel (creature VB/IB + textures)
- M2Renderer::loadModel (doodad VB/IB + textures)
- TerrainRenderer::loadTerrain/loadTerrainIncremental (chunk geometry + textures)
- TerrainRenderer::uploadPreloadedTextures
- WMORenderer::loadModel (group geometry + textures)
This commit is contained in:
Kelsi 2026-03-07 12:19:59 -08:00
parent 884b72bc1c
commit 16b4336700
8 changed files with 97 additions and 4 deletions
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12
src/rendering/vk_texture.cpp
View file

@ -96,7 +96,11 @@ bool VkTexture::upload(VkContext& ctx, const uint8_t* pixels, uint32_t width, ui
generateMipmaps(ctx, format, width, height);
}
destroyBuffer(ctx.getAllocator(), staging);
if (ctx.isInUploadBatch()) {
ctx.deferStagingCleanup(staging);
} else {
destroyBuffer(ctx.getAllocator(), staging);
}
return true;
}
@ -162,7 +166,11 @@ bool VkTexture::uploadMips(VkContext& ctx, const uint8_t* const* mipData,
VK_PIPELINE_STAGE_TRANSFER_BIT, VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT);
});
destroyBuffer(ctx.getAllocator(), staging);
if (ctx.isInUploadBatch()) {
ctx.deferStagingCleanup(staging);
} else {
destroyBuffer(ctx.getAllocator(), staging);
}
return true;
}