Make refetching dynamically loaded Vulkan API optional. (#37)

duburcqa · web-flow · commit d9038fba8a37 · 2025-08-22T12:09:05.000+02:00
diff --git a/src/render/vk/backend.cpp b/src/render/vk/backend.cpp
@@ -131,10 +131,11 @@ LoaderLib * LoaderLib::load()
         FATAL("Couldn't find vkGetInstanceProcAddr");
     }
     
-    get_inst_addr = (PFN_vkGetInstanceProcAddr)get_inst_addr(
+    auto get_inst_addr_refetched = (PFN_vkGetInstanceProcAddr)get_inst_addr(
         VK_NULL_HANDLE, "vkGetInstanceProcAddr");
-    if (get_inst_addr == VK_NULL_HANDLE) {
-        FATAL("Refetching vkGetInstanceProcAddr after dlsym failed");
+    if (get_inst_addr_refetched != VK_NULL_HANDLE) {
+        // Refetching should not be necessary and may even fail on some systems
+        get_inst_addr = get_inst_addr_refetched;
     }
 
     entry_fn = (void (*)())get_inst_addr;

Original file line number	Diff line number	Diff line change
`@@ -131,10 +131,11 @@ LoaderLib * LoaderLib::load()`
`131`	`131`	`FATAL("Couldn't find vkGetInstanceProcAddr");`
`132`	`132`	`}`
`133`	`133`
`134`		`- get_inst_addr = (PFN_vkGetInstanceProcAddr)get_inst_addr(`
	`134`	`+ auto get_inst_addr_refetched = (PFN_vkGetInstanceProcAddr)get_inst_addr(`
`135`	`135`	`VK_NULL_HANDLE, "vkGetInstanceProcAddr");`
`136`		`- if (get_inst_addr == VK_NULL_HANDLE) {`
`137`		`- FATAL("Refetching vkGetInstanceProcAddr after dlsym failed");`
	`136`	`+ if (get_inst_addr_refetched != VK_NULL_HANDLE) {`
	`137`	`+ // Refetching should not be necessary and may even fail on some systems`
	`138`	`+ get_inst_addr = get_inst_addr_refetched;`
`138`	`139`	`}`
`139`	`140`
`140`	`141`	`entry_fn = (void (*)())get_inst_addr;`