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39
40#include "qxcbvulkaninstance.h"
41#include "qxcbwindow.h"
42#include "qxcbscreen.h"
43
44QT_BEGIN_NAMESPACE
45
46QXcbVulkanInstance::QXcbVulkanInstance(QVulkanInstance *instance)
47 : m_instance(instance),
48 m_getPhysDevPresSupport(nullptr),
49 m_createSurface(nullptr)
50{
51 loadVulkanLibrary(QStringLiteral("vulkan"));
52}
53
54QXcbVulkanInstance::~QXcbVulkanInstance()
55{
56}
57
58void QXcbVulkanInstance::createOrAdoptInstance()
59{
60 initInstance(m_instance, QByteArrayList() << QByteArrayLiteral("VK_KHR_xcb_surface"));
61
62 if (!m_vkInst)
63 return;
64
65 m_getPhysDevPresSupport = reinterpret_cast<PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR>(
66 m_vkGetInstanceProcAddr(m_vkInst, "vkGetPhysicalDeviceXcbPresentationSupportKHR"));
67 if (!m_getPhysDevPresSupport)
68 qWarning("Failed to find vkGetPhysicalDeviceXcbPresentationSupportKHR");
69}
70
71bool QXcbVulkanInstance::supportsPresent(VkPhysicalDevice physicalDevice,
72 uint32_t queueFamilyIndex,
73 QWindow *window)
74{
75 if (!m_getPhysDevPresSupport || !m_getPhysDevSurfaceSupport)
76 return true;
77
78 QXcbWindow *w = static_cast<QXcbWindow *>(window->handle());
79 if (!w) {
80 qWarning("Attempted to call supportsPresent() without a valid platform window");
81 return false;
82 }
83 xcb_connection_t *connection = w->xcbScreen()->xcb_connection();
84 bool ok = m_getPhysDevPresSupport(physicalDevice, queueFamilyIndex, connection, w->visualId());
85
86 VkSurfaceKHR surface = QVulkanInstance::surfaceForWindow(window);
87 VkBool32 supported = false;
88 m_getPhysDevSurfaceSupport(physicalDevice, queueFamilyIndex, surface, &supported);
89 ok &= bool(supported);
90
91 return ok;
92}
93
94VkSurfaceKHR QXcbVulkanInstance::createSurface(QXcbWindow *window)
95{
96 VkSurfaceKHR surface = 0;
97
98 if (!m_createSurface) {
99 m_createSurface = reinterpret_cast<PFN_vkCreateXcbSurfaceKHR>(
100 m_vkGetInstanceProcAddr(m_vkInst, "vkCreateXcbSurfaceKHR"));
101 }
102 if (!m_createSurface) {
103 qWarning("Failed to find vkCreateXcbSurfaceKHR");
104 return surface;
105 }
106
107 VkXcbSurfaceCreateInfoKHR surfaceInfo;
108 memset(&surfaceInfo, 0, sizeof(surfaceInfo));
109 surfaceInfo.sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR;
110 surfaceInfo.connection = window->xcbScreen()->xcb_connection();
111 surfaceInfo.window = window->xcb_window();
112 VkResult err = m_createSurface(m_vkInst, &surfaceInfo, nullptr, &surface);
113 if (err != VK_SUCCESS)
114 qWarning("Failed to create Vulkan surface: %d", err);
115
116 return surface;
117}
118
119void QXcbVulkanInstance::presentQueued(QWindow *window)
120{
121 QXcbWindow *w = static_cast<QXcbWindow *>(window->handle());
122 if (!w) {
123 qWarning("Attempted to call presentQueued() without a valid platform window");
124 return;
125 }
126
127 if (w->needsSync())
128 w->postSyncWindowRequest();
129}
130
131QT_END_NAMESPACE
132

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