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From: blukai <20866892+blukai@users.noreply.github.com>
Date: Tue, 1 Apr 2025 01:55:16 +0200
Subject: fix vulkan vertex buffer indexing
this was causing problems when i was specifying non-zero buffer slots in
`SDL_BindGPUVertexBuffers`, `SDL_GPUVertexAttribute` and
`SDL_GPUVertexBufferDescription`.
`firstSlot + 1` is simply copied over from metal and d3d12 backends.
(cherry picked from commit 512485869ccb4bf058ab98281d1c7f0b2e33af41)
Origin: upstream, 3.2.12, commit:9109e05f3f1acff0843925eff9b46b1fa4b14951
---
src/gpu/vulkan/SDL_gpu_vulkan.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/src/gpu/vulkan/SDL_gpu_vulkan.c b/src/gpu/vulkan/SDL_gpu_vulkan.c
index 7ea1036..e085ed2 100644
--- a/src/gpu/vulkan/SDL_gpu_vulkan.c
+++ b/src/gpu/vulkan/SDL_gpu_vulkan.c
@@ -7943,11 +7943,11 @@ static void VULKAN_BindVertexBuffers(
for (Uint32 i = 0; i < numBindings; i += 1) {
VulkanBuffer *buffer = ((VulkanBufferContainer *)bindings[i].buffer)->activeBuffer;
- if (vulkanCommandBuffer->vertexBuffers[i] != buffer->buffer || vulkanCommandBuffer->vertexBufferOffsets[i] != bindings[i].offset) {
+ if (vulkanCommandBuffer->vertexBuffers[firstSlot + i] != buffer->buffer || vulkanCommandBuffer->vertexBufferOffsets[firstSlot + i] != bindings[i].offset) {
VULKAN_INTERNAL_TrackBuffer(vulkanCommandBuffer, buffer);
- vulkanCommandBuffer->vertexBuffers[i] = buffer->buffer;
- vulkanCommandBuffer->vertexBufferOffsets[i] = bindings[i].offset;
+ vulkanCommandBuffer->vertexBuffers[firstSlot + i] = buffer->buffer;
+ vulkanCommandBuffer->vertexBufferOffsets[firstSlot + i] = bindings[i].offset;
vulkanCommandBuffer->needVertexBufferBind = true;
}
}
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