wine/wine-6.0-vulkan-child-window.patch

From 4cc738f609faff68bf4c67d5618174fa87ab3cdb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20H=C3=A4dicke?= <felixhaedicke@web.de>
Date: Wed, 10 Jul 2019 22:19:31 +0200
Subject: [PATCH] winex11.drv: Support child window rendering for Vulkan via
 XComposite
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Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45277
Signed-off-by: Felix Hädicke <felixhaedicke@web.de>
---
 dlls/winex11.drv/vulkan.c | 56 ++++++++++++++++++++++++++++++++-------
 1 file changed, 47 insertions(+), 9 deletions(-)

diff --git a/dlls/winex11.drv/vulkan.c b/dlls/winex11.drv/vulkan.c
index 28ae1a9e0e8..3b0bf58c107 100644
--- a/dlls/winex11.drv/vulkan.c
+++ b/dlls/winex11.drv/vulkan.c
@@ -32,6 +32,7 @@
 #include "wine/debug.h"
 #include "wine/heap.h"
 #include "x11drv.h"
+#include "xcomposite.h"
 
 #define VK_NO_PROTOTYPES
 #define WINE_VK_HOST
@@ -56,6 +57,7 @@
 static CRITICAL_SECTION context_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 
 static XContext vulkan_hwnd_context;
+static XContext vulkan_swapchain_surface_context;
 
 #define VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR 1000004000
 
@@ -63,6 +65,7 @@
 {
     LONG ref;
     Window window;
+    HDC child_window_dc;
     VkSurfaceKHR surface; /* native surface */
 };
 
@@ -95,6 +98,7 @@
 static VkBool32 (*pvkGetPhysicalDeviceXlibPresentationSupportKHR)(VkPhysicalDevice, uint32_t, Display *, VisualID);
 static VkResult (*pvkGetSwapchainImagesKHR)(VkDevice, VkSwapchainKHR, uint32_t *, VkImage *);
 static VkResult (*pvkQueuePresentKHR)(VkQueue, const VkPresentInfoKHR *);
+static VkResult (*pvkQueueWaitIdle)(VkQueue);
 
 static void *X11DRV_get_vk_device_proc_addr(const char *name);
 static void *X11DRV_get_vk_instance_proc_addr(VkInstance instance, const char *name);
@@ -142,12 +146,14 @@
     LOAD_FUNCPTR(vkGetPhysicalDeviceXlibPresentationSupportKHR);
     LOAD_FUNCPTR(vkGetSwapchainImagesKHR);
     LOAD_FUNCPTR(vkQueuePresentKHR);
+    LOAD_FUNCPTR(vkQueueWaitIdle);
     LOAD_OPTIONAL_FUNCPTR(vkGetDeviceGroupSurfacePresentModesKHR);
     LOAD_OPTIONAL_FUNCPTR(vkGetPhysicalDevicePresentRectanglesKHR);
 #undef LOAD_FUNCPTR
 #undef LOAD_OPTIONAL_FUNCPTR
 
     vulkan_hwnd_context = XUniqueContext();
+    vulkan_swapchain_surface_context = XUniqueContext();
 
     return TRUE;
 
@@ -265,16 +271,24 @@
         const VkSwapchainCreateInfoKHR *create_info,
         const VkAllocationCallbacks *allocator, VkSwapchainKHR *swapchain)
 {
+    VkResult res;
     VkSwapchainCreateInfoKHR create_info_host;
+    struct wine_vk_surface *x11_surface = surface_from_handle(create_info->surface);
+
     TRACE("%p %p %p %p\n", device, create_info, allocator, swapchain);
 
     if (allocator)
         FIXME("Support for allocation callbacks not implemented yet\n");
 
     create_info_host = *create_info;
-    create_info_host.surface = surface_from_handle(create_info->surface)->surface;
+    create_info_host.surface = x11_surface->surface;
 
-    return pvkCreateSwapchainKHR(device, &create_info_host, NULL /* allocator */, swapchain);
+    res = pvkCreateSwapchainKHR(device, &create_info_host, NULL /* allocator */, swapchain);
+    if (res == VK_SUCCESS)
+    {
+        XSaveContext(gdi_display, (XID)(*swapchain), vulkan_swapchain_surface_context, (char *)x11_surface);
+    }
+    return res;
 }
 
 static VkResult X11DRV_vkCreateWin32SurfaceKHR(VkInstance instance,
@@ -290,13 +304,6 @@
     if (allocator)
         FIXME("Support for allocation callbacks not implemented yet\n");
 
-    /* TODO: support child window rendering. */
-    if (GetAncestor(create_info->hwnd, GA_PARENT) != GetDesktopWindow())
-    {
-        FIXME("Application requires child window rendering, which is not implemented yet!\n");
-        return VK_ERROR_INCOMPATIBLE_DRIVER;
-    }
-
     x11_surface = heap_alloc_zero(sizeof(*x11_surface));
     if (!x11_surface)
         return VK_ERROR_OUT_OF_HOST_MEMORY;
@@ -313,6 +320,23 @@
         goto err;
     }
 
+    /* child window rendering. */
+    if (GetAncestor(create_info->hwnd, GA_PARENT) != GetDesktopWindow())
+    {
+#ifdef SONAME_LIBXCOMPOSITE
+        if (usexcomposite)
+        {
+            pXCompositeRedirectWindow(gdi_display, x11_surface->window, CompositeRedirectManual);
+            x11_surface->child_window_dc = GetDC(create_info->hwnd);
+        }
+        else
+#endif
+        {
+            FIXME("Child window rendering is not supported without X Composite Extension!\n");
+            return VK_ERROR_INCOMPATIBLE_DRIVER;
+        }
+    }
+
     create_info_host.sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR;
     create_info_host.pNext = NULL;
     create_info_host.flags = 0; /* reserved */
@@ -382,6 +406,7 @@
         FIXME("Support for allocation callbacks not implemented yet\n");
 
     pvkDestroySwapchainKHR(device, swapchain, NULL /* allocator */);
+    XDeleteContext(gdi_display, (XID)swapchain, vulkan_swapchain_surface_context);
 }
 
 static VkResult X11DRV_vkEnumerateInstanceExtensionProperties(const char *layer_name,
@@ -608,6 +633,22 @@
         }
     }
 
+    for (uint32_t i = 0 ; i < present_info->swapchainCount; ++i)
+    {
+        struct wine_vk_surface *x11_surface;
+        if (!XFindContext(gdi_display, (XID)present_info->pSwapchains[i],
+                          vulkan_swapchain_surface_context, (char **)&x11_surface) &&
+            x11_surface->child_window_dc)
+        {
+            struct x11drv_escape_flush_gl_drawable escape;
+            escape.code = X11DRV_FLUSH_GL_DRAWABLE;
+            escape.gl_drawable = x11_surface->window;
+            escape.flush = TRUE;
+            pvkQueueWaitIdle(queue);
+            ExtEscape(x11_surface->child_window_dc, X11DRV_ESCAPE, sizeof(escape), (LPSTR)&escape, 0, NULL);
+        }
+    }
+
     return res;
 }