[PATCH 4/9] winewayland.drv: Implement vkCreateWin32SurfaceKHR.

[Alexandros Frantzis]

From: Alexandros Frantzis

Create Win32 VkSurfaceKHR objects which are backed by native Wayland
VkSurfaceKHR objects. For now we associate a dummy Wayland surface
with the VkSurfaceKHR.
---
 dlls/winewayland.drv/vulkan.c | 95 ++++++++++++++++++++++++++++++++++-
 1 file changed, 94 insertions(+), 1 deletion(-)

diff --git a/dlls/winewayland.drv/vulkan.c b/dlls/winewayland.drv/vulkan.c
index b89e6cdcc45..6e2d430881a 100644
--- a/dlls/winewayland.drv/vulkan.c
+++ b/dlls/winewayland.drv/vulkan.c
@@ -41,11 +41,40 @@ WINE_DEFAULT_DEBUG_CHANNEL(vulkan);

#ifdef SONAME_LIBVULKAN

+#define VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR 1000006000
+
+typedef struct VkWaylandSurfaceCreateInfoKHR
+{
+    VkStructureType sType;
+    const void *pNext;
+    VkWaylandSurfaceCreateFlagsKHR flags;
+    struct wl_display *display;
+    struct wl_surface *surface;
+} VkWaylandSurfaceCreateInfoKHR;
+
 static VkResult (*pvkCreateInstance)(const VkInstanceCreateInfo *, const VkAllocationCallbacks *, VkInstance *);
+static VkResult (*pvkCreateWaylandSurfaceKHR)(VkInstance, const VkWaylandSurfaceCreateInfoKHR *, const VkAllocationCallbacks *, VkSurfaceKHR *);
 static void (*pvkDestroyInstance)(VkInstance, const VkAllocationCallbacks *);

static void *vulkan_handle;

+struct wine_vk_surface
+{
+    struct wl_surface *client;
+    VkSurfaceKHR native;
+};
+
+static struct wine_vk_surface *wine_vk_surface_from_handle(VkSurfaceKHR handle)
+{
+    return (struct wine_vk_surface *)(uintptr_t)handle;
+}
+
+static void wine_vk_surface_destroy(struct wine_vk_surface *wine_vk_surface)
+{
+    if (wine_vk_surface->client) wl_surface_destroy(wine_vk_surface->client);
+    free(wine_vk_surface);
+}
+
 /* Helper function for converting between win32 and Wayland compatible VkInstanceCreateInfo.
  * Caller is responsible for allocation and cleanup of 'dst'. */
 static VkResult wine_vk_instance_convert_create_info(const VkInstanceCreateInfo *src,
@@ -117,6 +146,62 @@ static VkResult wayland_vkCreateInstance(const VkInstanceCreateInfo *create_info
     return res;
 }

+static VkResult wayland_vkCreateWin32SurfaceKHR(VkInstance instance,
+                                                const VkWin32SurfaceCreateInfoKHR *create_info,
+                                                const VkAllocationCallbacks *allocator,
+                                                VkSurfaceKHR *vk_surface)
+{
+    VkResult res;
+    VkWaylandSurfaceCreateInfoKHR create_info_host;
+    struct wine_vk_surface *wine_vk_surface;
+
+    TRACE("%p %p %p %p\n", instance, create_info, allocator, vk_surface);
+
+    if (allocator)
+        FIXME("Support for allocation callbacks not implemented yet\n");
+
+    wine_vk_surface = calloc(1, sizeof(*wine_vk_surface));
+    if (!wine_vk_surface)
+    {
+        ERR("Failed to allocate memory for wayland vulkan surface\n");
+        res = VK_ERROR_OUT_OF_HOST_MEMORY;
+        goto err;
+    }
+
+    wine_vk_surface->client = wl_compositor_create_surface(process_wayland.wl_compositor);
+    if (!wine_vk_surface->client)
+    {
+        ERR("Failed to create client surface for hwnd=%p\n", create_info->hwnd);
+        /* VK_KHR_win32_surface only allows out of host and device memory as errors. */
+        res = VK_ERROR_OUT_OF_HOST_MEMORY;
+        goto err;
+    }
+
+    create_info_host.sType = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR;
+    create_info_host.pNext = NULL;
+    create_info_host.flags = 0; /* reserved */
+    create_info_host.display = process_wayland.wl_display;
+    create_info_host.surface = wine_vk_surface->client;
+
+    res = pvkCreateWaylandSurfaceKHR(instance, &create_info_host,
+                                     NULL /* allocator */,
+                                     &wine_vk_surface->native);
+    if (res != VK_SUCCESS)
+    {
+        ERR("Failed to create vulkan wayland surface, res=%d\n", res);
+        goto err;
+    }
+
+    *vk_surface = (uintptr_t)wine_vk_surface;
+
+    TRACE("Created surface=0x%s\n", wine_dbgstr_longlong(*vk_surface));
+    return VK_SUCCESS;
+
+err:
+    if (wine_vk_surface) wine_vk_surface_destroy(wine_vk_surface);
+    return res;
+}
+
 static void wayland_vkDestroyInstance(VkInstance instance,
                                       const VkAllocationCallbacks *allocator)
 {
@@ -128,6 +213,11 @@ static void wayland_vkDestroyInstance(VkInstance instance,
     pvkDestroyInstance(instance, NULL /* allocator */);
 }

+static VkSurfaceKHR wayland_wine_get_native_surface(VkSurfaceKHR surface)
+{
+    return wine_vk_surface_from_handle(surface)->native;
+}
+
 static void wine_vk_init(void)
 {
     if (!(vulkan_handle = dlopen(SONAME_LIBVULKAN, RTLD_NOW)))
@@ -138,6 +228,7 @@ static void wine_vk_init(void)

#define LOAD_FUNCPTR(f) if (!(p##f = dlsym(vulkan_handle, #f))) goto fail
     LOAD_FUNCPTR(vkCreateInstance);
+    LOAD_FUNCPTR(vkCreateWaylandSurfaceKHR);
     LOAD_FUNCPTR(vkDestroyInstance);
 #undef LOAD_FUNCPTR

@@ -151,7 +242,9 @@ fail:
 static const struct vulkan_funcs vulkan_funcs =
 {
     .p_vkCreateInstance = wayland_vkCreateInstance,
-    .p_vkDestroyInstance = wayland_vkDestroyInstance
+    .p_vkCreateWin32SurfaceKHR = wayland_vkCreateWin32SurfaceKHR,
+    .p_vkDestroyInstance = wayland_vkDestroyInstance,
+    .p_wine_get_native_surface = wayland_wine_get_native_surface
 };

/**********************************************************************