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      1 
      2 /*
      3  * Copyright 2016 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 
     10 #include "vk/GrVkInterface.h"
     11 #include "vk/GrVkUtil.h"
     12 
     13 #include <X11/Xlib-xcb.h>
     14 
     15 #include "WindowContextFactory_unix.h"
     16 #include "../VulkanWindowContext.h"
     17 
     18 namespace sk_app {
     19 
     20 namespace window_context_factory {
     21 
     22 WindowContext* NewVulkanForXlib(const XlibWindowInfo& info, const DisplayParams& displayParams) {
     23     auto createVkSurface = [&info](VkInstance instance) -> VkSurfaceKHR {
     24         static PFN_vkCreateXcbSurfaceKHR createXcbSurfaceKHR = nullptr;
     25         if (!createXcbSurfaceKHR) {
     26             createXcbSurfaceKHR =
     27                     (PFN_vkCreateXcbSurfaceKHR) vkGetInstanceProcAddr(instance,
     28                                                                       "vkCreateXcbSurfaceKHR");
     29         }
     30 
     31         VkSurfaceKHR surface;
     32 
     33         VkXcbSurfaceCreateInfoKHR surfaceCreateInfo;
     34         memset(&surfaceCreateInfo, 0, sizeof(VkXcbSurfaceCreateInfoKHR));
     35         surfaceCreateInfo.sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR;
     36         surfaceCreateInfo.pNext = nullptr;
     37         surfaceCreateInfo.flags = 0;
     38         surfaceCreateInfo.connection = XGetXCBConnection(info.fDisplay);
     39         surfaceCreateInfo.window = info.fWindow;
     40 
     41         VkResult res = createXcbSurfaceKHR(instance, &surfaceCreateInfo, nullptr, &surface);
     42         if (VK_SUCCESS != res) {
     43             return VK_NULL_HANDLE;
     44         }
     45 
     46         return surface;
     47     };
     48 
     49     auto canPresent = [&info](VkInstance instance, VkPhysicalDevice physDev,
     50                               uint32_t queueFamilyIndex) {
     51         static PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR
     52                                                 getPhysicalDeviceXcbPresentationSupportKHR = nullptr;
     53         if (!getPhysicalDeviceXcbPresentationSupportKHR) {
     54             getPhysicalDeviceXcbPresentationSupportKHR =
     55                 (PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR)
     56                         vkGetInstanceProcAddr(instance,
     57                                               "vkGetPhysicalDeviceXcbPresentationSupportKHR");
     58         }
     59 
     60 
     61         Display* display = info.fDisplay;
     62         VisualID visualID = info.fVisualInfo->visualid;
     63         VkBool32 check = getPhysicalDeviceXcbPresentationSupportKHR(physDev,
     64                                                                     queueFamilyIndex,
     65                                                                     XGetXCBConnection(display),
     66                                                                     visualID);
     67         return (VK_FALSE != check);
     68     };
     69     WindowContext* context = new VulkanWindowContext(displayParams, createVkSurface, canPresent);
     70     if (!context->isValid()) {
     71         delete context;
     72         return nullptr;
     73     }
     74     return context;
     75 }
     76 
     77 }  // namespace VulkanWindowContextFactory
     78 
     79 }  // namespace sk_app
     80