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6164e0c636
A Vulkan implicit layer that captures frames from inside the workload's own process and encodes them on the GPU they were drawn on. Fourth and last of this batch, imported as a tree from `nestrilabs/nescapture` on the same terms. Filed under `apps/` rather than `crates/` despite building a cdylib. The rule here is what a thing *is*, not what it compiles to: this is a finished artefact that gets installed into an image beside its layer manifest, not a library another crate in this tree depends on. `crates/` is for the latter, and putting this there would make the distinction useless the first time someone looked. Wired to the workspace, `nesprotocol` by path. Its description named the transport component; that reads better as what it actually is — where the frames go — so it says that instead. Whole workspace builds and tests: 21 across four members. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
81 lines
3.5 KiB
Rust
81 lines
3.5 KiB
Rust
// ─────────────────────────────────────────────────────────────────────────────
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// instance.rs — vkCreateInstance and vkDestroyInstance
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// ─────────────────────────────────────────────────────────────────────────────
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use crate::dispatch::NextInstanceFn;
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use crate::state::INSTANCE_STATE;
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use crate::{VkLayerInstanceCreateInfo, dispatch_key, find_layer_link, load_instance_fn};
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use ash::vk::{self, Handle};
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use std::os::raw::c_void;
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use std::sync::Arc;
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use crate::dispatch::PFN_vkCreateInstance;
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const VK_LAYER_LINK_INFO: u32 = 0;
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#[unsafe(no_mangle)]
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pub unsafe extern "system" fn vkCreateInstance(
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p_create_info: *const vk::InstanceCreateInfo,
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p_allocator: *const vk::AllocationCallbacks,
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p_instance: *mut vk::Instance,
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) -> vk::Result {
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crate::init_logger();
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// ── Walk the pNext chain to find the loader's layer link ─────────────────
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let layer_info: *mut VkLayerInstanceCreateInfo = match unsafe {
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find_layer_link((*p_create_info).p_next as *const c_void, VK_LAYER_LINK_INFO)
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} {
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Some(p) => p,
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None => return vk::Result::ERROR_INITIALIZATION_FAILED,
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};
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let layer_link = unsafe { (*layer_info).u.pLayerInfo };
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let next_gipa = match unsafe { (*layer_link).pfnNextGetInstanceProcAddr } {
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Some(f) => f,
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None => return vk::Result::ERROR_INITIALIZATION_FAILED,
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};
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// Advance the chain before calling through so the next layer gets its link.
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unsafe { (*layer_info).u.pLayerInfo = (*layer_link).pNext };
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// ── Call the next layer / loader's vkCreateInstance ──────────────────────
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let next_create: PFN_vkCreateInstance =
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unsafe { load_instance_fn(next_gipa, vk::Instance::null(), b"vkCreateInstance\0") };
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let result = unsafe { next_create(p_create_info, p_allocator, p_instance) };
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if result != vk::Result::SUCCESS {
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return result;
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}
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let instance = unsafe { *p_instance };
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let key = unsafe { dispatch_key(instance.as_raw() as *const c_void) };
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// ── Build and store per-instance dispatch table ───────────────────────────
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let istate = Arc::new(NextInstanceFn {
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get_instance_proc_addr: next_gipa,
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destroy_instance: unsafe { load_instance_fn(next_gipa, instance, b"vkDestroyInstance\0") },
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get_physical_device_memory_properties: unsafe {
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load_instance_fn(
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next_gipa,
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instance,
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b"vkGetPhysicalDeviceMemoryProperties\0",
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)
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},
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create_device: unsafe { load_instance_fn(next_gipa, instance, b"vkCreateDevice\0") },
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});
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INSTANCE_STATE.insert(key, istate);
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log::debug!("vkCreateInstance OK (enabled={})", crate::enabled());
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vk::Result::SUCCESS
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}
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#[unsafe(no_mangle)]
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pub unsafe extern "system" fn vkDestroyInstance(
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instance: vk::Instance,
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p_allocator: *const vk::AllocationCallbacks,
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) {
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let key = unsafe { dispatch_key(instance.as_raw() as *const c_void) };
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if let Some((_, state)) = INSTANCE_STATE.remove(&key) {
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unsafe { (state.destroy_instance)(instance, p_allocator) };
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}
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}
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