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Fix #545: Windows renders through DX12 before Vulkan - #549
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Windows lists each GPU under both backends, and Vulkan came first. On an Intel GPU its driver made the whole window flicker black while the pointer moved; the same machine was fine with WGPU_BACKEND=dx12 or gl. adapter_order now ranks a GPU's DX12 adapter before its Vulkan one, after the power preference, so the GPU chosen doesn't change, only how it is driven. Vulkan stays the fallback (a failed DX12 start restarts on it) and WGPU_BACKEND=vulkan still picks it. Elsewhere there is no DX12 adapter, so nothing changes. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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On Windows every GPU is listed twice, once for Vulkan and once for DX12, and Vulkan came first. On the reporter's Intel GPU, Vulkan made the whole window flicker black while the pointer moved;
WGPU_BACKEND=dx12orglfixed it on the same machine.gpu::adapter_ordernow puts a GPU's DX12 adapter before its Vulkan one. This comes after the power preference, so the GPU chosen is the same as before; only the backend that drives it changes.WGPU_BACKEND=vulkanstill picks it. Linux, macOS and the web have no DX12 adapter, so nothing changes there.docs/development.md(Desktop graphics processor) and the ROADMAP.Checks
origin/main85dcb28.cargo test -p vectorcraft gpu: 13 passed.rendering with Intel(R) UHD Graphics 770 (Dx12, IntegratedGpu)andui.inspectagrees. Drawing and pointer moves render correctly.cargo xtask ciruns with the next integration batch.🤖 Generated with Claude Code