[PATCH] wined3d: Use the client area dimensions instead of the backbuffer dimensions for the Vulkan swapchain.

[Henri Verbeet]

Often these are the same, and even when not, the minimum/maximum image extents
will often end up forcing the swapchain dimensions to be the same as the
client area. However, some implementations will allow the swapchain to be
created with dimensions different from the client area, but then return
VK_SUBOPTIMAL_KHR from vkQueuePresentKHR().

Signed-off-by: Henri Verbeet 
---
 dlls/wined3d/swapchain.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/dlls/wined3d/swapchain.c b/dlls/wined3d/swapchain.c
index 92df08461d9..10e12a11482 100644
--- a/dlls/wined3d/swapchain.c
+++ b/dlls/wined3d/swapchain.c
@@ -884,6 +884,7 @@ static HRESULT wined3d_swapchain_vk_create_vulkan_swapchain(struct wined3d_swapc
     VkSurfaceKHR vk_surface;
     VkBool32 supported;
     VkFormat vk_format;
+    RECT client_rect;
     VkResult vr;

adapter_vk = wined3d_adapter_vk(device_vk->d.adapter);
@@ -931,21 +932,23 @@ static HRESULT wined3d_swapchain_vk_create_vulkan_swapchain(struct wined3d_swapc
         WARN("Image count %u is not supported (%u-%u).\n", desc->backbuffer_count,
                 surface_caps.minImageCount, surface_caps.maxImageCount);

-    width = desc->backbuffer_width;
+    GetClientRect(swapchain_vk->s.win_handle, &client_rect);
+
+    width = client_rect.right - client_rect.left;
     if (width < surface_caps.minImageExtent.width)
         width = surface_caps.minImageExtent.width;
     else if (width > surface_caps.maxImageExtent.width)
         width = surface_caps.maxImageExtent.width;

-    height = desc->backbuffer_height;
+    height = client_rect.bottom - client_rect.top;
     if (height < surface_caps.minImageExtent.height)
         height = surface_caps.minImageExtent.height;
     else if (height > surface_caps.maxImageExtent.height)
         height = surface_caps.maxImageExtent.height;

-    if (width != desc->backbuffer_width || height != desc->backbuffer_height)
+    if (width != client_rect.right - client_rect.left || height != client_rect.bottom - client_rect.top)
         WARN("Swapchain dimensions %ux%u are not supported (%u-%u x %u-%u).\n",
-                desc->backbuffer_width, desc->backbuffer_height,
+                client_rect.right - client_rect.left, client_rect.bottom - client_rect.top,
                 surface_caps.minImageExtent.width, surface_caps.maxImageExtent.width,
                 surface_caps.minImageExtent.height, surface_caps.maxImageExtent.height);