VulkanBinding: make a dummy Vulkan swapchain impl

src/include/nxt/nxt_wsi.h

@@ -66,4 +66,9 @@ typedef struct {
 } nxtWSIContextGL;
 #endif
 
+#ifdef NXT_ENABLE_BACKEND_VULKAN
+typedef struct {
+} nxtWSIContextVulkan;
+#endif
+
 #endif // NXT_WSI_H

src/utils/VulkanBinding.cpp

@@ -14,6 +14,9 @@
 
 #include "utils/BackendBinding.h"
 
+#include "nxt/nxt_wsi.h"
+#include "utils/SwapChainImpl.h"
+
 namespace backend {
     namespace vulkan {
         void Init(nxtProcTable* procs, nxtDevice* device);
@@ -22,6 +25,43 @@ namespace backend {
 
 namespace utils {
 
+    class SwapChainImplVulkan : SwapChainImpl {
+        public:
+            static nxtSwapChainImplementation Create(GLFWwindow* window) {
+                auto impl = GenerateSwapChainImplementation<SwapChainImplVulkan, nxtWSIContextVulkan>();
+                impl.userData = new SwapChainImplVulkan(window);
+                return impl;
+            }
+
+        private:
+            GLFWwindow* window = nullptr;
+
+            SwapChainImplVulkan(GLFWwindow* window)
+                : window(window) {
+            }
+
+            ~SwapChainImplVulkan() {
+            }
+
+            // For GenerateSwapChainImplementation
+            friend class SwapChainImpl;
+
+            void Init(nxtWSIContextVulkan*) {
+            }
+
+            nxtSwapChainError Configure(nxtTextureFormat, nxtTextureUsageBit, uint32_t, uint32_t) {
+                return NXT_SWAP_CHAIN_NO_ERROR;
+            }
+
+            nxtSwapChainError GetNextTexture(nxtSwapChainNextTexture*) {
+                return NXT_SWAP_CHAIN_NO_ERROR;
+            }
+
+            nxtSwapChainError Present() {
+                return NXT_SWAP_CHAIN_NO_ERROR;
+            }
+    };
+
     class VulkanBinding : public BackendBinding {
         public:
             void SetupGLFWWindowHints() override {
@@ -30,11 +70,17 @@ namespace utils {
                 backend::vulkan::Init(procs, device);
             }
             uint64_t GetSwapChainImplementation() override {
-                return 0;
+                if (swapchainImpl.userData == nullptr) {
+                    swapchainImpl = SwapChainImplVulkan::Create(window);
+                }
+                return reinterpret_cast<uint64_t>(&swapchainImpl);
             }
             nxtTextureFormat GetPreferredSwapChainTextureFormat() override {
                 return NXT_TEXTURE_FORMAT_R8_G8_B8_A8_UNORM;
             }
+
+        private:
+            nxtSwapChainImplementation swapchainImpl = {};
     };