Merge branch 'master' into temp-ghost-vulkan

CMakeLists.txt

@@ -1239,12 +1239,14 @@ if(WITH_OPENGL)
   add_definitions(-DWITH_OPENGL)
 endif()
 
-
-# -----------------------------------------------------------------------------
+#-----------------------------------------------------------------------------
 # Configure Vulkan.
 
 if(WITH_VULKAN_BACKEND)
-  add_definitions(-DWITH_VULKAN_BACKEND)
+  list(APPEND BLENDER_GL_LIBRARIES ${VULKAN_LIBRARIES})
+  if(APPLE)
+    list(APPEND BLENDER_GL_LIBRARIES ${MOLTENVK_LIBRARIES})
+  endif()
 endif()
 
 # -----------------------------------------------------------------------------

build_files/cmake/Modules/FindMoltenVK.cmake

@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2022 Blender Foundation.
+
+# - Find MoltenVK libraries
+# Find the MoltenVK includes and libraries
+# This module defines
+#  MOLTENVK_INCLUDE_DIRS, where to find MoltenVK headers, Set when
+#                        MOLTENVK_INCLUDE_DIR is found.
+#  MOLTENVK_LIBRARIES, libraries to link against to use MoltenVK.
+#  MOLTENVK_ROOT_DIR, The base directory to search for MoltenVK.
+#                    This can also be an environment variable.
+#  MOLTENVK_FOUND, If false, do not try to use MoltenVK.
+#
+
+# If MOLTENVK_ROOT_DIR was defined in the environment, use it.
+IF(NOT MOLTENVK_ROOT_DIR AND NOT $ENV{MOLTENVK_ROOT_DIR} STREQUAL "")
+  SET(MOLTENVK_ROOT_DIR $ENV{MOLTENVK_ROOT_DIR})
+ENDIF()
+
+SET(_moltenvk_SEARCH_DIRS
+  ${MOLTENVK_ROOT_DIR}
+  ${LIBDIR}/vulkan/MoltenVK
+)
+
+
+FIND_PATH(MOLTENVK_INCLUDE_DIR
+  NAMES
+    MoltenVK/vk_mvk_moltenvk.h
+  HINTS
+    ${_moltenvk_SEARCH_DIRS}
+  PATH_SUFFIXES
+    include
+)
+
+FIND_LIBRARY(MOLTENVK_LIBRARY
+  NAMES
+    MoltenVK
+  HINTS
+    ${_moltenvk_SEARCH_DIRS}
+  PATH_SUFFIXES
+    dylib/macOS
+)
+
+# handle the QUIETLY and REQUIRED arguments and set MOLTENVK_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(MoltenVK DEFAULT_MSG MOLTENVK_LIBRARY MOLTENVK_INCLUDE_DIR)
+
+IF(MOLTENVK_FOUND)
+  SET(MOLTENVK_LIBRARIES ${MOLTENVK_LIBRARY})
+  SET(MOLTENVK_INCLUDE_DIRS ${MOLTENVK_INCLUDE_DIR})
+ENDIF()
+
+MARK_AS_ADVANCED(
+  MOLTENVK_INCLUDE_DIR
+  MOLTENVK_LIBRARY
+)
+
+UNSET(_moltenvk_SEARCH_DIRS)

build_files/cmake/platform/platform_apple.cmake

@@ -100,6 +100,11 @@ if(WITH_USD)
   find_package(USD REQUIRED)
 endif()
 
+if(WITH_VULKAN_BACKEND)
+  find_package(Vulkan REQUIRED)
+  find_package(MoltenVK REQUIRED)
+endif()
+
 if(WITH_OPENSUBDIV)
   find_package(OpenSubdiv)
 endif()

build_files/cmake/platform/platform_unix.cmake

@@ -108,6 +108,10 @@ find_package_wrapper(ZLIB REQUIRED)
 find_package_wrapper(Zstd REQUIRED)
 find_package_wrapper(Epoxy REQUIRED)
 
+if(WITH_VULKAN_BACKEND)
+  find_package_wrapper(Vulkan REQUIRED)
+endif()
+
 function(check_freetype_for_brotli)
   include(CheckSymbolExists)
   set(CMAKE_REQUIRED_INCLUDES ${FREETYPE_INCLUDE_DIRS})

build_files/cmake/platform/platform_win32.cmake

@@ -926,6 +926,20 @@ if(WITH_HARU)
   set(HARU_LIBRARIES ${HARU_ROOT_DIR}/lib/libhpdfs.lib)
 endif()
 
+if(WITH_VULKAN_BACKEND)
+  if(EXISTS ${LIBDIR}/vulkan)
+    set(VULKAN_FOUND On)
+    set(VULKAN_ROOT_DIR ${LIBDIR}/vulkan)
+    set(VULKAN_INCLUDE_DIR ${VULKAN_ROOT_DIR}/include)
+    set(VULKAN_INCLUDE_DIRS ${VULKAN_INCLUDE_DIR})
+    set(VULKAN_LIBRARY ${VULKAN_ROOT_DIR}/lib/vulkan-1.lib)
+    set(VULKAN_LIBRARIES ${VULKAN_LIBRARY})
+  else()
+    message(WARNING "Vulkan was not found, disabling WITH_VULKAN_BACKEND")
+    set(WITH_VULKAN_BACKEND OFF)
+  endif()
+endif()
+
 if(WITH_CYCLES AND WITH_CYCLES_PATH_GUIDING)
   find_package(openpgl QUIET)
   if(openpgl_FOUND)

intern/ghost/CMakeLists.txt

@@ -76,6 +76,26 @@ set(LIB
   ${Epoxy_LIBRARIES}
 )
 
+if(WITH_VULKAN_BACKEND)
+  list(APPEND SRC
+    intern/GHOST_ContextVK.cpp
+
+    intern/GHOST_ContextVK.h
+  )
+
+  list(APPEND INC_SYS
+    ${VULKAN_INCLUDE_DIRS}
+    ${MOLTENVK_INCLUDE_DIRS}
+  )
+
+  list(APPEND LIB
+    ${VULKAN_LIBRARIES}
+    ${MOLTENVK_LIBRARIES}
+  )
+
+  add_definitions(-DWITH_VULKAN_BACKEND)
+endif()
+
 if(WITH_GHOST_DEBUG)
   list(APPEND SRC
     intern/GHOST_EventPrinter.cpp

intern/ghost/GHOST_C-api.h

@@ -1185,6 +1185,30 @@ int GHOST_XrGetControllerModelData(GHOST_XrContextHandle xr_context,
 
 #endif /* WITH_XR_OPENXR */
 
+#ifdef WITH_VULKAN_BACKEND
+
+/**
+ * Return vulkan handles for the given context.
+ */
+void GHOST_GetVulkanHandles(GHOST_ContextHandle context,
+                            void *r_instance,
+                            void *r_physical_device,
+                            void *r_device,
+                            uint32_t *r_graphic_queue_familly);
+
+/**
+ * Return vulkan backbuffer resources handles for the given window.
+ */
+void GHOST_GetVulkanBackbuffer(GHOST_WindowHandle windowhandle,
+                               void *image,
+                               void *framebuffer,
+                               void *command_buffer,
+                               void *render_pass,
+                               void *extent,
+                               uint32_t *fb_id);
+
+#endif
+
 #ifdef __cplusplus
 }
 

intern/ghost/GHOST_IContext.h

@@ -40,6 +40,20 @@ class GHOST_IContext {
 
   virtual unsigned int getDefaultFramebuffer() = 0;
 
+  virtual GHOST_TSuccess getVulkanHandles(void *, void *, void *, uint32_t *) = 0;
+
+  /**
+   * Gets the Vulkan framebuffer related resource handles associated with the Vulkan context.
+   * Needs to be called after each swap events as the framebuffer will change.
+   * \return  A boolean success indicator.
+   */
+  virtual GHOST_TSuccess getVulkanBackbuffer(void *image,
+                                             void *framebuffer,
+                                             void *command_buffer,
+                                             void *render_pass,
+                                             void *extent,
+                                             uint32_t *fb_id) = 0;
+
   virtual GHOST_TSuccess swapBuffers() = 0;
 
 #ifdef WITH_CXX_GUARDEDALLOC

intern/ghost/GHOST_IWindow.h

@@ -14,6 +14,8 @@
 #include <stdlib.h>
 #include <string>
 
+class GHOST_IContext;
+
 /**
  * Interface for GHOST windows.
  *
@@ -62,6 +64,12 @@ class GHOST_IWindow {
    */
   virtual GHOST_TSuccess setDrawingContextType(GHOST_TDrawingContextType type) = 0;
 
+  /**
+   * Returns the drawing context used in this window.
+   * \return The current drawing context.
+   */
+  virtual GHOST_IContext *getDrawingContext() = 0;
+
   /**
    * Sets the title displayed in the title bar.
    * \param title: The title to display in the title bar.
@@ -202,6 +210,18 @@ class GHOST_IWindow {
    */
   virtual unsigned int getDefaultFramebuffer() = 0;
 
+  /**
+   * Gets the Vulkan framebuffer related resource handles associated with the Vulkan context.
+   * Needs to be called after each swap events as the framebuffer will change.
+   * \return  A boolean success indicator.
+   */
+  virtual GHOST_TSuccess getVulkanBackbuffer(void *image,
+                                             void *framebuffer,
+                                             void *command_buffer,
+                                             void *render_pass,
+                                             void *extent,
+                                             uint32_t *fb_id) = 0;
+
   /**
    * Invalidates the contents of this window.
    * \return Indication of success.

intern/ghost/GHOST_Types.h

@@ -156,6 +156,9 @@ typedef enum {
 #ifdef __APPLE__
   GHOST_kDrawingContextTypeMetal,
 #endif
+#ifdef WITH_VULKAN_BACKEND
+  GHOST_kDrawingContextTypeVulkan,
+#endif
 } GHOST_TDrawingContextType;
 
 typedef enum {

intern/ghost/intern/GHOST_C-api.cpp

@@ -565,6 +565,12 @@ GHOST_TSuccess GHOST_SetDrawingContextType(GHOST_WindowHandle windowhandle,
   return window->setDrawingContextType(type);
 }
 
+GHOST_ContextHandle GHOST_GetDrawingContext(GHOST_WindowHandle windowhandle)
+{
+  GHOST_IWindow *window = (GHOST_IWindow *)windowhandle;
+  return (GHOST_ContextHandle)window->getDrawingContext();
+}
+
 void GHOST_SetTitle(GHOST_WindowHandle windowhandle, const char *title)
 {
   GHOST_IWindow *window = (GHOST_IWindow *)windowhandle;
@@ -1190,3 +1196,35 @@ int GHOST_XrGetControllerModelData(GHOST_XrContextHandle xr_contexthandle,
 }
 
 #endif /* WITH_XR_OPENXR */
+
+#ifdef WITH_VULKAN_BACKEND
+
+/**
+ * Return vulkan handles for the given context.
+ */
+void GHOST_GetVulkanHandles(GHOST_ContextHandle contexthandle,
+                            void *r_instance,
+                            void *r_physical_device,
+                            void *r_device,
+                            uint32_t *r_graphic_queue_familly)
+{
+  GHOST_IContext *context = (GHOST_IContext *)contexthandle;
+  context->getVulkanHandles(r_instance, r_physical_device, r_device, r_graphic_queue_familly);
+}
+
+/**
+ * Return vulkan backbuffer resources handles for the given window.
+ */
+void GHOST_GetVulkanBackbuffer(GHOST_WindowHandle windowhandle,
+                               void *image,
+                               void *framebuffer,
+                               void *command_buffer,
+                               void *render_pass,
+                               void *extent,
+                               uint32_t *fb_id)
+{
+  GHOST_IWindow *window = (GHOST_IWindow *)windowhandle;
+  window->getVulkanBackbuffer(image, framebuffer, command_buffer, render_pass, extent, fb_id);
+}
+
+#endif /* WITH_VULKAN */

intern/ghost/intern/GHOST_Context.h

@@ -135,6 +135,33 @@ class GHOST_Context : public GHOST_IContext {
     return 0;
   }
 
+  /**
+   * Gets the Vulkan context related resource handles.
+   * \return  A boolean success indicator.
+   */
+  virtual GHOST_TSuccess getVulkanHandles(void * /*r_instance*/,
+                                          void * /*r_physical_device*/,
+                                          void * /*r_device*/,
+                                          uint32_t * /*r_graphic_queue_familly*/) override
+  {
+    return GHOST_kFailure;
+  };
+
+  /**
+   * Gets the Vulkan framebuffer related resource handles associated with the Vulkan context.
+   * Needs to be called after each swap events as the framebuffer will change.
+   * \return  A boolean success indicator.
+   */
+  virtual GHOST_TSuccess getVulkanBackbuffer(void * /*image*/,
+                                             void * /*framebuffer*/,
+                                             void * /*command_buffer*/,
+                                             void * /*render_pass*/,
+                                             void * /*extent*/,
+                                             uint32_t * /*fb_id*/) override
+  {
+    return GHOST_kFailure;
+  }
+
  protected:
   bool m_stereoVisual;
 

intern/ghost/intern/GHOST_ContextVK.cpp

@@ -0,0 +1,975 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup GHOST
+ */
+
+#include "GHOST_ContextVK.h"
+
+#ifdef _WIN32
+#  include <vulkan/vulkan_win32.h>
+#elif defined(__APPLE__)
+#  include <MoltenVK/vk_mvk_moltenvk.h>
+#else /* X11 */
+#  include <vulkan/vulkan_xlib.h>
+#  ifdef WITH_GHOST_WAYLAND
+#    include <vulkan/vulkan_wayland.h>
+#  endif
+#endif
+
+#include <vector>
+
+#include <cassert>
+#include <cstdio>
+#include <cstring>
+#include <iostream>
+
+/* Set to 0 to allow devices that do not have the required features.
+ * This allows development on OSX until we really needs these features. */
+#define STRICT_REQUIREMENTS 1
+
+using namespace std;
+
+static const char *vulkan_error_as_string(VkResult result)
+{
+#define FORMAT_ERROR(X) \
+  case X: { \
+    return "" #X; \
+  }
+
+  switch (result) {
+    FORMAT_ERROR(VK_NOT_READY);
+    FORMAT_ERROR(VK_TIMEOUT);
+    FORMAT_ERROR(VK_EVENT_SET);
+    FORMAT_ERROR(VK_EVENT_RESET);
+    FORMAT_ERROR(VK_INCOMPLETE);
+    FORMAT_ERROR(VK_ERROR_OUT_OF_HOST_MEMORY);
+    FORMAT_ERROR(VK_ERROR_OUT_OF_DEVICE_MEMORY);
+    FORMAT_ERROR(VK_ERROR_INITIALIZATION_FAILED);
+    FORMAT_ERROR(VK_ERROR_DEVICE_LOST);
+    FORMAT_ERROR(VK_ERROR_MEMORY_MAP_FAILED);
+    FORMAT_ERROR(VK_ERROR_LAYER_NOT_PRESENT);
+    FORMAT_ERROR(VK_ERROR_EXTENSION_NOT_PRESENT);
+    FORMAT_ERROR(VK_ERROR_FEATURE_NOT_PRESENT);
+    FORMAT_ERROR(VK_ERROR_INCOMPATIBLE_DRIVER);
+    FORMAT_ERROR(VK_ERROR_TOO_MANY_OBJECTS);
+    FORMAT_ERROR(VK_ERROR_FORMAT_NOT_SUPPORTED);
+    FORMAT_ERROR(VK_ERROR_FRAGMENTED_POOL);
+    FORMAT_ERROR(VK_ERROR_UNKNOWN);
+    FORMAT_ERROR(VK_ERROR_OUT_OF_POOL_MEMORY);
+    FORMAT_ERROR(VK_ERROR_INVALID_EXTERNAL_HANDLE);
+    FORMAT_ERROR(VK_ERROR_FRAGMENTATION);
+    FORMAT_ERROR(VK_ERROR_INVALID_OPAQUE_CAPTURE_ADDRESS);
+    FORMAT_ERROR(VK_ERROR_SURFACE_LOST_KHR);
+    FORMAT_ERROR(VK_ERROR_NATIVE_WINDOW_IN_USE_KHR);
+    FORMAT_ERROR(VK_SUBOPTIMAL_KHR);
+    FORMAT_ERROR(VK_ERROR_OUT_OF_DATE_KHR);
+    FORMAT_ERROR(VK_ERROR_INCOMPATIBLE_DISPLAY_KHR);
+    FORMAT_ERROR(VK_ERROR_VALIDATION_FAILED_EXT);
+    FORMAT_ERROR(VK_ERROR_INVALID_SHADER_NV);
+    FORMAT_ERROR(VK_ERROR_INVALID_DRM_FORMAT_MODIFIER_PLANE_LAYOUT_EXT);
+    FORMAT_ERROR(VK_ERROR_NOT_PERMITTED_EXT);
+    FORMAT_ERROR(VK_ERROR_FULL_SCREEN_EXCLUSIVE_MODE_LOST_EXT);
+    FORMAT_ERROR(VK_THREAD_IDLE_KHR);
+    FORMAT_ERROR(VK_THREAD_DONE_KHR);
+    FORMAT_ERROR(VK_OPERATION_DEFERRED_KHR);
+    FORMAT_ERROR(VK_OPERATION_NOT_DEFERRED_KHR);
+    FORMAT_ERROR(VK_PIPELINE_COMPILE_REQUIRED_EXT);
+    default:
+      return "Unknown Error";
+  }
+}
+
+#define __STR(A) "" #A
+#define VK_CHECK(__expression) \
+  do { \
+    VkResult r = (__expression); \
+    if (r != VK_SUCCESS) { \
+      fprintf(stderr, \
+              "Vulkan Error : %s:%d : %s failled with %s\n", \
+              __FILE__, \
+              __LINE__, \
+              __STR(__expression), \
+              vulkan_error_as_string(r)); \
+      return GHOST_kFailure; \
+    } \
+  } while (0)
+
+#define DEBUG_PRINTF(...) \
+  if (m_debug) { \
+    printf(__VA_ARGS__); \
+  }
+
+/* Tripple buffering. */
+const int MAX_FRAMES_IN_FLIGHT = 2;
+
+GHOST_ContextVK::GHOST_ContextVK(bool stereoVisual,
+#ifdef _WIN32
+                                 HWND hwnd,
+#elif defined(__APPLE__)
+                                 CAMetalLayer *metal_layer,
+#else
+                                 GHOST_TVulkanPlatformType platform,
+                                 /* X11 */
+                                 Window window,
+                                 Display *display,
+                                 /* Wayland */
+                                 wl_surface *wayland_surface,
+                                 wl_display *wayland_display,
+#endif
+                                 int contextMajorVersion,
+                                 int contextMinorVersion,
+                                 int debug)
+    : GHOST_Context(stereoVisual),
+#ifdef _WIN32
+      m_hwnd(hwnd),
+#elif defined(__APPLE__)
+      m_metal_layer(metal_layer),
+#else
+      m_platform(platform),
+      /* X11 */
+      m_display(display),
+      m_window(window),
+      /* Wayland */
+      m_wayland_surface(wayland_surface),
+      m_wayland_display(wayland_display),
+#endif
+      m_context_major_version(contextMajorVersion),
+      m_context_minor_version(contextMinorVersion),
+      m_debug(debug),
+      m_instance(VK_NULL_HANDLE),
+      m_physical_device(VK_NULL_HANDLE),
+      m_device(VK_NULL_HANDLE),
+      m_command_pool(VK_NULL_HANDLE),
+      m_surface(VK_NULL_HANDLE),
+      m_swapchain(VK_NULL_HANDLE),
+      m_render_pass(VK_NULL_HANDLE)
+{
+}
+
+GHOST_ContextVK::~GHOST_ContextVK()
+{
+  if (m_device) {
+    vkDeviceWaitIdle(m_device);
+  }
+
+  destroySwapchain();
+
+  if (m_command_pool != VK_NULL_HANDLE) {
+    vkDestroyCommandPool(m_device, m_command_pool, NULL);
+  }
+  if (m_device != VK_NULL_HANDLE) {
+    vkDestroyDevice(m_device, NULL);
+  }
+  if (m_surface != VK_NULL_HANDLE) {
+    vkDestroySurfaceKHR(m_instance, m_surface, NULL);
+  }
+  if (m_instance != VK_NULL_HANDLE) {
+    vkDestroyInstance(m_instance, NULL);
+  }
+}
+
+GHOST_TSuccess GHOST_ContextVK::destroySwapchain()
+{
+  if (m_device != VK_NULL_HANDLE) {
+    vkDeviceWaitIdle(m_device);
+  }
+
+  m_in_flight_images.resize(0);
+
+  for (auto semaphore : m_image_available_semaphores) {
+    vkDestroySemaphore(m_device, semaphore, NULL);
+  }
+  for (auto semaphore : m_render_finished_semaphores) {
+    vkDestroySemaphore(m_device, semaphore, NULL);
+  }
+  for (auto fence : m_in_flight_fences) {
+    vkDestroyFence(m_device, fence, NULL);
+  }
+  for (auto framebuffer : m_swapchain_framebuffers) {
+    vkDestroyFramebuffer(m_device, framebuffer, NULL);
+  }
+  if (m_render_pass != VK_NULL_HANDLE) {
+    vkDestroyRenderPass(m_device, m_render_pass, NULL);
+  }
+  for (auto command_buffer : m_command_buffers) {
+    vkFreeCommandBuffers(m_device, m_command_pool, 1, &command_buffer);
+  }
+  for (auto imageView : m_swapchain_image_views) {
+    vkDestroyImageView(m_device, imageView, NULL);
+  }
+  if (m_swapchain != VK_NULL_HANDLE) {
+    vkDestroySwapchainKHR(m_device, m_swapchain, NULL);
+  }
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::swapBuffers()
+{
+  if (m_swapchain == VK_NULL_HANDLE) {
+    return GHOST_kFailure;
+  }
+
+  vkWaitForFences(m_device, 1, &m_in_flight_fences[m_currentFrame], VK_TRUE, UINT64_MAX);
+
+  VkResult result = vkAcquireNextImageKHR(m_device,
+                                          m_swapchain,
+                                          UINT64_MAX,
+                                          m_image_available_semaphores[m_currentFrame],
+                                          VK_NULL_HANDLE,
+                                          &m_currentImage);
+
+  if (result == VK_ERROR_OUT_OF_DATE_KHR || result == VK_SUBOPTIMAL_KHR) {
+    /* Swapchain is out of date. Recreate swapchain and skip this frame. */
+    destroySwapchain();
+    createSwapchain();
+    return GHOST_kSuccess;
+  }
+  else if (result != VK_SUCCESS) {
+    fprintf(stderr,
+            "Error: Failed to acquire swap chain image : %s\n",
+            vulkan_error_as_string(result));
+    return GHOST_kFailure;
+  }
+
+  /* Check if a previous frame is using this image (i.e. there is its fence to wait on) */
+  if (m_in_flight_images[m_currentImage] != VK_NULL_HANDLE) {
+    vkWaitForFences(m_device, 1, &m_in_flight_images[m_currentImage], VK_TRUE, UINT64_MAX);
+  }
+  m_in_flight_images[m_currentImage] = m_in_flight_fences[m_currentFrame];
+
+  VkPipelineStageFlags wait_stages[] = {VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT};
+
+  VkSubmitInfo submit_info = {};
+  submit_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+  submit_info.waitSemaphoreCount = 1;
+  submit_info.pWaitSemaphores = &m_image_available_semaphores[m_currentFrame];
+  submit_info.pWaitDstStageMask = wait_stages;
+  submit_info.commandBufferCount = 1;
+  submit_info.pCommandBuffers = &m_command_buffers[m_currentImage];
+  submit_info.signalSemaphoreCount = 1;
+  submit_info.pSignalSemaphores = &m_render_finished_semaphores[m_currentFrame];
+
+  vkResetFences(m_device, 1, &m_in_flight_fences[m_currentFrame]);
+
+  VK_CHECK(vkQueueSubmit(m_graphic_queue, 1, &submit_info, m_in_flight_fences[m_currentFrame]));
+  do {
+    result = vkWaitForFences(m_device, 1, &m_in_flight_fences[m_currentFrame], VK_TRUE, 10000);
+  } while (result == VK_TIMEOUT);
+
+  VK_CHECK(vkQueueWaitIdle(m_graphic_queue));
+
+  VkPresentInfoKHR present_info = {};
+  present_info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
+  present_info.waitSemaphoreCount = 1;
+  present_info.pWaitSemaphores = &m_render_finished_semaphores[m_currentFrame];
+  present_info.swapchainCount = 1;
+  present_info.pSwapchains = &m_swapchain;
+  present_info.pImageIndices = &m_currentImage;
+  present_info.pResults = NULL;
+
+  result = vkQueuePresentKHR(m_present_queue, &present_info);
+
+  if (result == VK_ERROR_OUT_OF_DATE_KHR || result == VK_SUBOPTIMAL_KHR) {
+    /* Swapchain is out of date. Recreate swapchain and skip this frame. */
+    destroySwapchain();
+    createSwapchain();
+    return GHOST_kSuccess;
+  }
+  else if (result != VK_SUCCESS) {
+    fprintf(stderr,
+            "Error: Failed to present swap chain image : %s\n",
+            vulkan_error_as_string(result));
+    return GHOST_kFailure;
+  }
+
+  m_currentFrame = (m_currentFrame + 1) % MAX_FRAMES_IN_FLIGHT;
+
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::getVulkanBackbuffer(void *image,
+                                                    void *framebuffer,
+                                                    void *command_buffer,
+                                                    void *render_pass,
+                                                    void *extent,
+                                                    uint32_t *fb_id)
+{
+  if (m_swapchain == VK_NULL_HANDLE) {
+    return GHOST_kFailure;
+  }
+  *((VkImage *)image) = m_swapchain_images[m_currentImage];
+  *((VkFramebuffer *)framebuffer) = m_swapchain_framebuffers[m_currentImage];
+  *((VkCommandBuffer *)command_buffer) = m_command_buffers[m_currentImage];
+  *((VkRenderPass *)render_pass) = m_render_pass;
+  *((VkExtent2D *)extent) = m_render_extent;
+  *fb_id = m_swapchain_id * 10 + m_currentFrame;
+
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::getVulkanHandles(void *r_instance,
+                                                 void *r_physical_device,
+                                                 void *r_device,
+                                                 uint32_t *r_graphic_queue_familly)
+{
+  *((VkInstance *)r_instance) = m_instance;
+  *((VkPhysicalDevice *)r_physical_device) = m_physical_device;
+  *((VkDevice *)r_device) = m_device;
+  *r_graphic_queue_familly = m_queue_family_graphic;
+
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::activateDrawingContext()
+{
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::releaseDrawingContext()
+{
+  return GHOST_kSuccess;
+}
+
+static vector<VkExtensionProperties> getExtensionsAvailable()
+{
+  uint32_t extension_count = 0;
+  vkEnumerateInstanceExtensionProperties(NULL, &extension_count, NULL);
+
+  vector<VkExtensionProperties> extensions(extension_count);
+  vkEnumerateInstanceExtensionProperties(NULL, &extension_count, extensions.data());
+
+  return extensions;
+}
+
+static bool checkExtensionSupport(vector<VkExtensionProperties> &extensions_available,
+                                  const char *extension_name)
+{
+  for (const auto &extension : extensions_available) {
+    if (strcmp(extension_name, extension.extensionName) == 0) {
+      return true;
+    }
+  }
+  return false;
+}
+
+static void requireExtension(vector<VkExtensionProperties> &extensions_available,
+                             vector<const char *> &extensions_enabled,
+                             const char *extension_name)
+{
+  if (checkExtensionSupport(extensions_available, extension_name)) {
+    extensions_enabled.push_back(extension_name);
+  }
+  else {
+    fprintf(stderr, "Error: %s not found.\n", extension_name);
+  }
+}
+
+static vector<VkLayerProperties> getLayersAvailable()
+{
+  uint32_t layer_count = 0;
+  vkEnumerateInstanceLayerProperties(&layer_count, NULL);
+
+  vector<VkLayerProperties> layers(layer_count);
+  vkEnumerateInstanceLayerProperties(&layer_count, layers.data());
+
+  return layers;
+}
+
+static bool checkLayerSupport(vector<VkLayerProperties> &layers_available, const char *layer_name)
+{
+  for (const auto &layer : layers_available) {
+    if (strcmp(layer_name, layer.layerName) == 0) {
+      return true;
+    }
+  }
+  return false;
+}
+
+static void enableLayer(vector<VkLayerProperties> &layers_available,
+                        vector<const char *> &layers_enabled,
+                        const char *layer_name)
+{
+  if (checkLayerSupport(layers_available, layer_name)) {
+    layers_enabled.push_back(layer_name);
+  }
+  else {
+    fprintf(stderr, "Error: %s not supported.\n", layer_name);
+  }
+}
+
+static bool device_extensions_support(VkPhysicalDevice device, vector<const char *> required_exts)
+{
+  uint32_t ext_count;
+  vkEnumerateDeviceExtensionProperties(device, NULL, &ext_count, NULL);
+
+  vector<VkExtensionProperties> available_exts(ext_count);
+  vkEnumerateDeviceExtensionProperties(device, NULL, &ext_count, available_exts.data());
+
+  for (const auto &extension_needed : required_exts) {
+    bool found = false;
+    for (const auto &extension : available_exts) {
+      if (strcmp(extension_needed, extension.extensionName) == 0) {
+        found = true;
+        break;
+      }
+    }
+    if (!found) {
+      return false;
+    }
+  }
+  return true;
+}
+
+GHOST_TSuccess GHOST_ContextVK::pickPhysicalDevice(vector<const char *> required_exts)
+{
+  m_physical_device = VK_NULL_HANDLE;
+
+  uint32_t device_count = 0;
+  vkEnumeratePhysicalDevices(m_instance, &device_count, NULL);
+
+  vector<VkPhysicalDevice> physical_devices(device_count);
+  vkEnumeratePhysicalDevices(m_instance, &device_count, physical_devices.data());
+
+  int best_device_score = -1;
+  for (const auto &physical_device : physical_devices) {
+    VkPhysicalDeviceProperties device_properties;
+    vkGetPhysicalDeviceProperties(physical_device, &device_properties);
+
+    VkPhysicalDeviceFeatures features;
+    vkGetPhysicalDeviceFeatures(physical_device, &features);
+
+    DEBUG_PRINTF("%s : \n", device_properties.deviceName);
+
+    if (!device_extensions_support(physical_device, required_exts)) {
+      DEBUG_PRINTF("  - Device does not support required device extensions.\n");
+      continue;
+    }
+
+    if (m_surface != VK_NULL_HANDLE) {
+      uint32_t format_count;
+      vkGetPhysicalDeviceSurfaceFormatsKHR(physical_device, m_surface, &format_count, NULL);
+
+      uint32_t present_count;
+      vkGetPhysicalDeviceSurfacePresentModesKHR(physical_device, m_surface, &present_count, NULL);
+
+      /* For now anything will do. */
+      if (format_count == 0 || present_count == 0) {
+        DEBUG_PRINTF("  - Device does not support presentation.\n");
+        continue;
+      }
+    }
+
+    if (!features.geometryShader) {
+      /* Needed for wide lines emulation and barycentric coords and a few others. */
+      DEBUG_PRINTF("  - Device does not support geometryShader.\n");
+    }
+    if (!features.dualSrcBlend) {
+      DEBUG_PRINTF("  - Device does not support dualSrcBlend.\n");
+    }
+    if (!features.logicOp) {
+      /* Needed by UI. */
+      DEBUG_PRINTF("  - Device does not support logicOp.\n");
+    }
+
+#if STRICT_REQUIREMENTS
+    if (!features.geometryShader || !features.dualSrcBlend || !features.logicOp) {
+      continue;
+    }
+#endif
+
+    int device_score = 0;
+    switch (device_properties.deviceType) {
+      case VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU:
+        device_score = 400;
+        break;
+      case VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU:
+        device_score = 300;
+        break;
+      case VK_PHYSICAL_DEVICE_TYPE_VIRTUAL_GPU:
+        device_score = 200;
+        break;
+      case VK_PHYSICAL_DEVICE_TYPE_CPU:
+        device_score = 100;
+        break;
+      default:
+        break;
+    }
+    if (device_score > best_device_score) {
+      m_physical_device = physical_device;
+      best_device_score = device_score;
+    }
+    DEBUG_PRINTF("  - Device suitable.\n");
+  }
+
+  if (m_physical_device == VK_NULL_HANDLE) {
+    fprintf(stderr, "Error: No suitable Vulkan Device found!\n");
+    return GHOST_kFailure;
+  }
+
+  return GHOST_kSuccess;
+}
+
+static GHOST_TSuccess getGraphicQueueFamily(VkPhysicalDevice device, uint32_t *r_queue_index)
+{
+  uint32_t queue_family_count = 0;
+  vkGetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, NULL);
+
+  vector<VkQueueFamilyProperties> queue_families(queue_family_count);
+  vkGetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, queue_families.data());
+
+  *r_queue_index = 0;
+  for (const auto &queue_family : queue_families) {
+    if (queue_family.queueFlags & VK_QUEUE_GRAPHICS_BIT) {
+      return GHOST_kSuccess;
+    }
+    (*r_queue_index)++;
+  }
+
+  fprintf(stderr, "Couldn't find any Graphic queue familly on selected device\n");
+  return GHOST_kFailure;
+}
+
+static GHOST_TSuccess getPresetQueueFamily(VkPhysicalDevice device,
+                                           VkSurfaceKHR surface,
+                                           uint32_t *r_queue_index)
+{
+  uint32_t queue_family_count = 0;
+  vkGetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, NULL);
+
+  vector<VkQueueFamilyProperties> queue_families(queue_family_count);
+  vkGetPhysicalDeviceQueueFamilyProperties(device, &queue_family_count, queue_families.data());
+
+  *r_queue_index = 0;
+  for (int i = 0; i < queue_family_count; i++) {
+    VkBool32 present_support = false;
+    vkGetPhysicalDeviceSurfaceSupportKHR(device, *r_queue_index, surface, &present_support);
+
+    if (present_support) {
+      return GHOST_kSuccess;
+    }
+    (*r_queue_index)++;
+  }
+
+  fprintf(stderr, "Couldn't find any Present queue familly on selected device\n");
+  return GHOST_kFailure;
+}
+
+static GHOST_TSuccess create_render_pass(VkDevice device,
+                                         VkFormat format,
+                                         VkRenderPass *r_renderPass)
+{
+  VkAttachmentDescription colorAttachment = {};
+  colorAttachment.format = format;
+  colorAttachment.samples = VK_SAMPLE_COUNT_1_BIT;
+  colorAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+  colorAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+  colorAttachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+  colorAttachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
+  colorAttachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+  colorAttachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+
+  VkAttachmentReference colorAttachmentRef = {};
+  colorAttachmentRef.attachment = 0;
+  colorAttachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+
+  VkSubpassDescription subpass = {};
+  subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
+  subpass.colorAttachmentCount = 1;
+  subpass.pColorAttachments = &colorAttachmentRef;
+
+  VkRenderPassCreateInfo renderPassInfo = {};
+  renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
+  renderPassInfo.attachmentCount = 1;
+  renderPassInfo.pAttachments = &colorAttachment;
+  renderPassInfo.subpassCount = 1;
+  renderPassInfo.pSubpasses = &subpass;
+
+  VK_CHECK(vkCreateRenderPass(device, &renderPassInfo, NULL, r_renderPass));
+
+  return GHOST_kSuccess;
+}
+
+static GHOST_TSuccess selectPresentMode(VkPhysicalDevice device,
+                                        VkSurfaceKHR surface,
+                                        VkPresentModeKHR *r_presentMode)
+{
+  uint32_t present_count;
+  vkGetPhysicalDeviceSurfacePresentModesKHR(device, surface, &present_count, NULL);
+  vector<VkPresentModeKHR> presents(present_count);
+  vkGetPhysicalDeviceSurfacePresentModesKHR(device, surface, &present_count, presents.data());
+  /* MAILBOX is the lowest latency V-Sync enabled mode so use it if available */
+  for (auto present_mode : presents) {
+    if (present_mode == VK_PRESENT_MODE_FIFO_KHR) {
+      *r_presentMode = present_mode;
+      return GHOST_kSuccess;
+    }
+  }
+  /* FIFO present mode is always available. */
+  for (auto present_mode : presents) {
+    if (present_mode == VK_PRESENT_MODE_MAILBOX_KHR) {
+      *r_presentMode = present_mode;
+      return GHOST_kSuccess;
+    }
+  }
+
+  fprintf(stderr, "Error: FIFO present mode is not supported by the swap chain!\n");
+
+  return GHOST_kFailure;
+}
+
+GHOST_TSuccess GHOST_ContextVK::createCommandBuffers()
+{
+  m_command_buffers.resize(m_swapchain_image_views.size());
+
+  VkCommandPoolCreateInfo poolInfo = {};
+  poolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
+  poolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
+  poolInfo.queueFamilyIndex = m_queue_family_graphic;
+
+  VK_CHECK(vkCreateCommandPool(m_device, &poolInfo, NULL, &m_command_pool));
+
+  VkCommandBufferAllocateInfo alloc_info = {};
+  alloc_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
+  alloc_info.commandPool = m_command_pool;
+  alloc_info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
+  alloc_info.commandBufferCount = static_cast<uint32_t>(m_command_buffers.size());
+
+  VK_CHECK(vkAllocateCommandBuffers(m_device, &alloc_info, m_command_buffers.data()));
+
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::createSwapchain()
+{
+  m_swapchain_id++;
+
+  VkPhysicalDevice device = m_physical_device;
+
+  uint32_t format_count;
+  vkGetPhysicalDeviceSurfaceFormatsKHR(device, m_surface, &format_count, NULL);
+  vector<VkSurfaceFormatKHR> formats(format_count);
+  vkGetPhysicalDeviceSurfaceFormatsKHR(device, m_surface, &format_count, formats.data());
+
+  /* TODO choose appropriate format. */
+  VkSurfaceFormatKHR format = formats[0];
+
+  VkPresentModeKHR present_mode;
+  if (!selectPresentMode(device, m_surface, &present_mode)) {
+    return GHOST_kFailure;
+  }
+
+  VkSurfaceCapabilitiesKHR capabilities;
+  vkGetPhysicalDeviceSurfaceCapabilitiesKHR(device, m_surface, &capabilities);
+
+  m_render_extent = capabilities.currentExtent;
+  if (m_render_extent.width == UINT32_MAX) {
+    /* Window Manager is going to set the surface size based on the given size.
+     * Choose something between minImageExtent and maxImageExtent. */
+    m_render_extent.width = 1280;
+    m_render_extent.height = 720;
+    if (capabilities.minImageExtent.width > m_render_extent.width) {
+      m_render_extent.width = capabilities.minImageExtent.width;
+    }
+    if (capabilities.minImageExtent.height > m_render_extent.height) {
+      m_render_extent.height = capabilities.minImageExtent.height;
+    }
+  }
+
+  /* Driver can stall if only using minimal image count. */
+  uint32_t image_count = capabilities.minImageCount;
+  /* Note: maxImageCount == 0 means no limit. */
+  if (image_count > capabilities.maxImageCount && capabilities.maxImageCount > 0) {
+    image_count = capabilities.maxImageCount;
+  }
+
+  VkSwapchainCreateInfoKHR create_info = {};
+  create_info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
+  create_info.surface = m_surface;
+  create_info.minImageCount = image_count;
+  create_info.imageFormat = format.format;
+  create_info.imageColorSpace = format.colorSpace;
+  create_info.imageExtent = m_render_extent;
+  create_info.imageArrayLayers = 1;
+  create_info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+  create_info.preTransform = capabilities.currentTransform;
+  create_info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
+  create_info.presentMode = present_mode;
+  create_info.clipped = VK_TRUE;
+  create_info.oldSwapchain = VK_NULL_HANDLE; /* TODO Window resize */
+
+  uint32_t queueFamilyIndices[] = {m_queue_family_graphic, m_queue_family_present};
+
+  if (m_queue_family_graphic != m_queue_family_present) {
+    create_info.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
+    create_info.queueFamilyIndexCount = 2;
+    create_info.pQueueFamilyIndices = queueFamilyIndices;
+  }
+  else {
+    create_info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
+    create_info.queueFamilyIndexCount = 0;
+    create_info.pQueueFamilyIndices = NULL;
+  }
+
+  VK_CHECK(vkCreateSwapchainKHR(m_device, &create_info, NULL, &m_swapchain));
+
+  create_render_pass(m_device, format.format, &m_render_pass);
+
+  /* image_count may not be what we requested! Getter for final value. */
+  vkGetSwapchainImagesKHR(m_device, m_swapchain, &image_count, NULL);
+  m_swapchain_images.resize(image_count);
+  vkGetSwapchainImagesKHR(m_device, m_swapchain, &image_count, m_swapchain_images.data());
+
+  m_in_flight_images.resize(image_count, VK_NULL_HANDLE);
+  m_swapchain_image_views.resize(image_count);
+  m_swapchain_framebuffers.resize(image_count);
+  for (int i = 0; i < image_count; i++) {
+    VkImageViewCreateInfo view_create_info = {};
+    view_create_info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+    view_create_info.image = m_swapchain_images[i];
+    view_create_info.viewType = VK_IMAGE_VIEW_TYPE_2D;
+    view_create_info.format = format.format;
+    view_create_info.components = {
+        VK_COMPONENT_SWIZZLE_IDENTITY,
+        VK_COMPONENT_SWIZZLE_IDENTITY,
+        VK_COMPONENT_SWIZZLE_IDENTITY,
+        VK_COMPONENT_SWIZZLE_IDENTITY,
+    };
+    view_create_info.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+    view_create_info.subresourceRange.baseMipLevel = 0;
+    view_create_info.subresourceRange.levelCount = 1;
+    view_create_info.subresourceRange.baseArrayLayer = 0;
+    view_create_info.subresourceRange.layerCount = 1;
+
+    VK_CHECK(vkCreateImageView(m_device, &view_create_info, NULL, &m_swapchain_image_views[i]));
+
+    VkImageView attachments[] = {m_swapchain_image_views[i]};
+
+    VkFramebufferCreateInfo fb_create_info = {};
+    fb_create_info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
+    fb_create_info.renderPass = m_render_pass;
+    fb_create_info.attachmentCount = 1;
+    fb_create_info.pAttachments = attachments;
+    fb_create_info.width = m_render_extent.width;
+    fb_create_info.height = m_render_extent.height;
+    fb_create_info.layers = 1;
+
+    VK_CHECK(vkCreateFramebuffer(m_device, &fb_create_info, NULL, &m_swapchain_framebuffers[i]));
+  }
+
+  m_image_available_semaphores.resize(MAX_FRAMES_IN_FLIGHT);
+  m_render_finished_semaphores.resize(MAX_FRAMES_IN_FLIGHT);
+  m_in_flight_fences.resize(MAX_FRAMES_IN_FLIGHT);
+  for (int i = 0; i < MAX_FRAMES_IN_FLIGHT; i++) {
+
+    VkSemaphoreCreateInfo semaphore_info = {};
+    semaphore_info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+
+    VK_CHECK(vkCreateSemaphore(m_device, &semaphore_info, NULL, &m_image_available_semaphores[i]));
+    VK_CHECK(vkCreateSemaphore(m_device, &semaphore_info, NULL, &m_render_finished_semaphores[i]));
+
+    VkFenceCreateInfo fence_info = {};
+    fence_info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+    fence_info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
+
+    VK_CHECK(vkCreateFence(m_device, &fence_info, NULL, &m_in_flight_fences[i]));
+  }
+
+  createCommandBuffers();
+
+  return GHOST_kSuccess;
+}
+
+const char *GHOST_ContextVK::getPlatformSpecificSurfaceExtension() const
+{
+#ifdef _WIN32
+  return VK_KHR_WIN32_SURFACE_EXTENSION_NAME;
+#elif defined(__APPLE__)
+  return VK_EXT_METAL_SURFACE_EXTENSION_NAME;
+#else /* UNIX/Linux */
+  switch (m_platform) {
+    case GHOST_kVulkanPlatformX11:
+      return VK_KHR_XLIB_SURFACE_EXTENSION_NAME;
+      break;
+#  ifdef WITH_GHOST_WAYLAND
+    case GHOST_kVulkanPlatformWayland:
+      return VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME;
+      break;
+#  endif
+  }
+#endif
+  return NULL;
+}
+
+GHOST_TSuccess GHOST_ContextVK::initializeDrawingContext()
+{
+#ifdef _WIN32
+  const bool use_window_surface = (m_hwnd != NULL);
+#elif defined(__APPLE__)
+  const bool use_window_surface = (m_metal_layer != NULL);
+#else /* UNIX/Linux */
+  bool use_window_surface = false;
+  switch (m_platform) {
+    case GHOST_kVulkanPlatformX11:
+      use_window_surface = (m_display != NULL) && (m_window != (Window)NULL);
+      break;
+#  ifdef WITH_GHOST_WAYLAND
+    case GHOST_kVulkanPlatformWayland:
+      use_window_surface = (m_wayland_display != NULL) && (m_wayland_surface != NULL);
+      break;
+#  endif
+  }
+#endif
+
+  auto layers_available = getLayersAvailable();
+  auto extensions_available = getExtensionsAvailable();
+
+  vector<const char *> layers_enabled;
+  if (m_debug) {
+    enableLayer(layers_available, layers_enabled, "VK_LAYER_KHRONOS_validation");
+  }
+
+  vector<const char *> extensions_device;
+  vector<const char *> extensions_enabled;
+
+  if (use_window_surface) {
+    const char *native_surface_extension_name = getPlatformSpecificSurfaceExtension();
+
+    requireExtension(extensions_available, extensions_enabled, "VK_KHR_surface");
+    requireExtension(extensions_available, extensions_enabled, native_surface_extension_name);
+
+    extensions_device.push_back(VK_KHR_SWAPCHAIN_EXTENSION_NAME);
+  }
+
+  VkApplicationInfo app_info = {};
+  app_info.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
+  app_info.pApplicationName = "Blender";
+  app_info.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
+  app_info.pEngineName = "Blender";
+  app_info.engineVersion = VK_MAKE_VERSION(1, 0, 0);
+  app_info.apiVersion = VK_MAKE_VERSION(m_context_major_version, m_context_minor_version, 0);
+
+  VkInstanceCreateInfo create_info = {};
+  create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
+  create_info.pApplicationInfo = &app_info;
+  create_info.enabledLayerCount = static_cast<uint32_t>(layers_enabled.size());
+  create_info.ppEnabledLayerNames = layers_enabled.data();
+  create_info.enabledExtensionCount = static_cast<uint32_t>(extensions_enabled.size());
+  create_info.ppEnabledExtensionNames = extensions_enabled.data();
+
+  VK_CHECK(vkCreateInstance(&create_info, NULL, &m_instance));
+
+  if (use_window_surface) {
+#ifdef _WIN32
+    VkWin32SurfaceCreateInfoKHR surface_create_info = {};
+    surface_create_info.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
+    surface_create_info.hinstance = GetModuleHandle(NULL);
+    surface_create_info.hwnd = m_hwnd;
+    VK_CHECK(vkCreateWin32SurfaceKHR(m_instance, &surface_create_info, NULL, &m_surface));
+#elif defined(__APPLE__)
+    VkMetalSurfaceCreateInfoEXT info = {};
+    info.sType = VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT;
+    info.pNext = NULL;
+    info.flags = 0;
+    info.pLayer = m_metal_layer;
+    VK_CHECK(vkCreateMetalSurfaceEXT(m_instance, &info, nullptr, &m_surface));
+#else
+    switch (m_platform) {
+      case GHOST_kVulkanPlatformX11: {
+        VkXlibSurfaceCreateInfoKHR surface_create_info = {};
+        surface_create_info.sType = VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR;
+        surface_create_info.dpy = m_display;
+        surface_create_info.window = m_window;
+        VK_CHECK(vkCreateXlibSurfaceKHR(m_instance, &surface_create_info, NULL, &m_surface));
+        break;
+      }
+#  ifdef WITH_GHOST_WAYLAND
+      case GHOST_kVulkanPlatformWayland: {
+        VkWaylandSurfaceCreateInfoKHR surface_create_info = {};
+        surface_create_info.sType = VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR;
+        surface_create_info.display = m_wayland_display;
+        surface_create_info.surface = m_wayland_surface;
+        VK_CHECK(vkCreateWaylandSurfaceKHR(m_instance, &surface_create_info, NULL, &m_surface));
+        break;
+      }
+#  endif
+    }
+
+#endif
+  }
+
+  if (!pickPhysicalDevice(extensions_device)) {
+    return GHOST_kFailure;
+  }
+
+  vector<VkDeviceQueueCreateInfo> queue_create_infos;
+
+  {
+    /* A graphic queue is required to draw anything. */
+    if (!getGraphicQueueFamily(m_physical_device, &m_queue_family_graphic)) {
+      return GHOST_kFailure;
+    }
+
+    float queue_priorities[] = {1.0f};
+    VkDeviceQueueCreateInfo graphic_queue_create_info = {};
+    graphic_queue_create_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
+    graphic_queue_create_info.queueFamilyIndex = m_queue_family_graphic;
+    graphic_queue_create_info.queueCount = 1;
+    graphic_queue_create_info.pQueuePriorities = queue_priorities;
+    queue_create_infos.push_back(graphic_queue_create_info);
+  }
+
+  if (use_window_surface) {
+    /* A present queue is required only if we render to a window. */
+    if (!getPresetQueueFamily(m_physical_device, m_surface, &m_queue_family_present)) {
+      return GHOST_kFailure;
+    }
+
+    float queue_priorities[] = {1.0f};
+    VkDeviceQueueCreateInfo present_queue_create_info = {};
+    present_queue_create_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
+    present_queue_create_info.queueFamilyIndex = m_queue_family_present;
+    present_queue_create_info.queueCount = 1;
+    present_queue_create_info.pQueuePriorities = queue_priorities;
+
+    /* Eash queue must be unique. */
+    if (m_queue_family_graphic != m_queue_family_present) {
+      queue_create_infos.push_back(present_queue_create_info);
+    }
+  }
+
+  VkPhysicalDeviceFeatures device_features = {};
+#if STRICT_REQUIREMENTS
+  device_features.geometryShader = VK_TRUE;
+  device_features.dualSrcBlend = VK_TRUE;
+  device_features.logicOp = VK_TRUE;
+#endif
+
+  VkDeviceCreateInfo device_create_info = {};
+  device_create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
+  device_create_info.queueCreateInfoCount = static_cast<uint32_t>(queue_create_infos.size());
+  device_create_info.pQueueCreateInfos = queue_create_infos.data();
+  /* layers_enabled are the same as instance extensions.
+   * This is only needed for 1.0 implementations. */
+  device_create_info.enabledLayerCount = static_cast<uint32_t>(layers_enabled.size());
+  device_create_info.ppEnabledLayerNames = layers_enabled.data();
+  device_create_info.enabledExtensionCount = static_cast<uint32_t>(extensions_device.size());
+  device_create_info.ppEnabledExtensionNames = extensions_device.data();
+  device_create_info.pEnabledFeatures = &device_features;
+
+  VK_CHECK(vkCreateDevice(m_physical_device, &device_create_info, NULL, &m_device));
+
+  vkGetDeviceQueue(m_device, m_queue_family_graphic, 0, &m_graphic_queue);
+
+  if (use_window_surface) {
+    vkGetDeviceQueue(m_device, m_queue_family_present, 0, &m_present_queue);
+
+    createSwapchain();
+  }
+  return GHOST_kSuccess;
+}
+
+GHOST_TSuccess GHOST_ContextVK::releaseNativeHandles()
+{
+  return GHOST_kSuccess;
+}

intern/ghost/intern/GHOST_ContextVK.h

@@ -0,0 +1,205 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup GHOST
+ */
+
+#pragma once
+
+#include "GHOST_Context.h"
+
+#ifdef _WIN32
+#  include "GHOST_SystemWin32.h"
+#elif defined(__APPLE__)
+#  include "GHOST_SystemCocoa.h"
+#else
+#  include "GHOST_SystemX11.h"
+#  ifdef WITH_GHOST_WAYLAND
+#    include "GHOST_SystemWayland.h"
+#  else
+#    define wl_surface void
+#    define wl_display void
+#  endif
+#endif
+
+#include <vector>
+
+#ifdef __APPLE__
+#  include <MoltenVK/vk_mvk_moltenvk.h>
+#else
+#  include <vulkan/vulkan.h>
+#endif
+
+#ifndef GHOST_OPENGL_VK_CONTEXT_FLAGS
+/* leave as convenience define for the future */
+#  define GHOST_OPENGL_VK_CONTEXT_FLAGS 0
+#endif
+
+#ifndef GHOST_OPENGL_VK_RESET_NOTIFICATION_STRATEGY
+#  define GHOST_OPENGL_VK_RESET_NOTIFICATION_STRATEGY 0
+#endif
+
+typedef enum {
+  GHOST_kVulkanPlatformX11 = 0,
+#ifdef WITH_GHOST_WAYLAND
+  GHOST_kVulkanPlatformWayland,
+#endif
+} GHOST_TVulkanPlatformType;
+
+class GHOST_ContextVK : public GHOST_Context {
+ public:
+  /**
+   * Constructor.
+   */
+  GHOST_ContextVK(bool stereoVisual,
+#ifdef _WIN32
+                  HWND hwnd,
+#elif defined(__APPLE__)
+                  /* FIXME CAMetalLayer but have issue with linking. */
+                  void *metal_layer,
+#else
+                  GHOST_TVulkanPlatformType platform,
+                  /* X11 */
+                  Window window,
+                  Display *display,
+                  /* Wayland */
+                  wl_surface *wayland_surface,
+                  wl_display *wayland_display,
+#endif
+                  int contextMajorVersion,
+                  int contextMinorVersion,
+                  int m_debug);
+
+  /**
+   * Destructor.
+   */
+  ~GHOST_ContextVK();
+
+  /**
+   * Swaps front and back buffers of a window.
+   * \return  A boolean success indicator.
+   */
+  GHOST_TSuccess swapBuffers();
+
+  /**
+   * Activates the drawing context of this window.
+   * \return  A boolean success indicator.
+   */
+  GHOST_TSuccess activateDrawingContext();
+
+  /**
+   * Release the drawing context of the calling thread.
+   * \return  A boolean success indicator.
+   */
+  GHOST_TSuccess releaseDrawingContext();
+
+  /**
+   * Call immediately after new to initialize.  If this fails then immediately delete the object.
+   * \return Indication as to whether initialization has succeeded.
+   */
+  GHOST_TSuccess initializeDrawingContext();
+
+  /**
+   * Removes references to native handles from this context and then returns
+   * \return GHOST_kSuccess if it is OK for the parent to release the handles and
+   * GHOST_kFailure if releasing the handles will interfere with sharing
+   */
+  GHOST_TSuccess releaseNativeHandles();
+
+  /**
+   * Gets the Vulkan context related resource handles.
+   * \return  A boolean success indicator.
+   */
+  GHOST_TSuccess getVulkanHandles(void *r_instance,
+                                  void *r_physical_device,
+                                  void *r_device,
+                                  uint32_t *r_graphic_queue_familly);
+  /**
+   * Gets the Vulkan framebuffer related resource handles associated with the Vulkan context.
+   * Needs to be called after each swap events as the framebuffer will change.
+   * \return  A boolean success indicator.
+   */
+  GHOST_TSuccess getVulkanBackbuffer(void *image,
+                                     void *framebuffer,
+                                     void *command_buffer,
+                                     void *render_pass,
+                                     void *extent,
+                                     uint32_t *fb_id);
+
+  /**
+   * Sets the swap interval for swapBuffers.
+   * \param interval The swap interval to use.
+   * \return A boolean success indicator.
+   */
+  GHOST_TSuccess setSwapInterval(int /* interval */)
+  {
+    return GHOST_kFailure;
+  }
+
+  /**
+   * Gets the current swap interval for swapBuffers.
+   * \param intervalOut Variable to store the swap interval if it can be read.
+   * \return Whether the swap interval can be read.
+   */
+  GHOST_TSuccess getSwapInterval(int &)
+  {
+    return GHOST_kFailure;
+  };
+
+ private:
+#ifdef _WIN32
+  HWND m_hwnd;
+#elif defined(__APPLE__)
+  CAMetalLayer *m_metal_layer;
+#else /* Linux */
+  GHOST_TVulkanPlatformType m_platform;
+  /* X11 */
+  Display *m_display;
+  Window m_window;
+  /* Wayland */
+  wl_surface *m_wayland_surface;
+  wl_display *m_wayland_display;
+#endif
+
+  const int m_context_major_version;
+  const int m_context_minor_version;
+  const int m_debug;
+
+  VkInstance m_instance;
+  VkPhysicalDevice m_physical_device;
+  VkDevice m_device;
+  VkCommandPool m_command_pool;
+
+  uint32_t m_queue_family_graphic;
+  uint32_t m_queue_family_present;
+
+  VkQueue m_graphic_queue;
+  VkQueue m_present_queue;
+
+  /* For display only. */
+  VkSurfaceKHR m_surface;
+  VkSwapchainKHR m_swapchain;
+  std::vector<VkImage> m_swapchain_images;
+  std::vector<VkImageView> m_swapchain_image_views;
+  std::vector<VkFramebuffer> m_swapchain_framebuffers;
+  std::vector<VkCommandBuffer> m_command_buffers;
+  VkRenderPass m_render_pass;
+  VkExtent2D m_render_extent;
+  std::vector<VkSemaphore> m_image_available_semaphores;
+  std::vector<VkSemaphore> m_render_finished_semaphores;
+  std::vector<VkFence> m_in_flight_fences;
+  std::vector<VkFence> m_in_flight_images;
+  /** frame modulo swapchain_len. Used as index for sync objects. */
+  int m_currentFrame = 0;
+  /** Image index in the swapchain. Used as index for render objects. */
+  uint32_t m_currentImage = 0;
+  /** Used to unique framebuffer ids to return when swapchain is recreated. */
+  uint32_t m_swapchain_id = 0;
+
+  const char *getPlatformSpecificSurfaceExtension() const;
+  GHOST_TSuccess pickPhysicalDevice(std::vector<const char *> required_exts);
+  GHOST_TSuccess createSwapchain();
+  GHOST_TSuccess destroySwapchain();
+  GHOST_TSuccess createCommandBuffers();
+  GHOST_TSuccess recordCommandBuffers();
+};

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -18,6 +18,10 @@
 
 #include "GHOST_ContextCGL.h"
 
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
+
 #ifdef WITH_INPUT_NDOF
 #  include "GHOST_NDOFManagerCocoa.h"
 #endif
@@ -750,6 +754,18 @@ GHOST_IWindow *GHOST_SystemCocoa::createWindow(const char *title,
  */
 GHOST_IContext *GHOST_SystemCocoa::createOffscreenContext(GHOST_GLSettings glSettings)
 {
+#ifdef WITH_VULKAN_BACKEND
+  if (glSettings.context_type == GHOST_kDrawingContextTypeVulkan) {
+    const bool debug_context = (glSettings.flags & GHOST_glDebugContext) != 0;
+    GHOST_Context *context = new GHOST_ContextVK(false, NULL, 1, 0, debug_context);
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return NULL;
+    }
+    return context;
+  }
+#endif
+
   GHOST_Context *context = new GHOST_ContextCGL(false, NULL, NULL, NULL, glSettings.context_type);
   if (context->initializeDrawingContext())
     return context;

intern/ghost/intern/GHOST_SystemWayland.cpp

@@ -20,6 +20,10 @@
 
 #include "GHOST_ContextEGL.h"
 
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
+
 #ifdef WITH_INPUT_NDOF
 #  include "GHOST_NDOFManagerUnix.h"
 #endif
@@ -6014,7 +6018,7 @@ static GHOST_Context *createOffscreenContext_impl(GHOST_SystemWayland *system,
   return nullptr;
 }
 
-GHOST_IContext *GHOST_SystemWayland::createOffscreenContext(GHOST_GLSettings /*glSettings*/)
+GHOST_IContext *GHOST_SystemWayland::createOffscreenContext(GHOST_GLSettings glSettings)
 {
 #ifdef USE_EVENT_BACKGROUND_THREAD
   std::lock_guard lock_server_guard{*server_mutex};
@@ -6022,6 +6026,31 @@ GHOST_IContext *GHOST_SystemWayland::createOffscreenContext(GHOST_GLSettings /*g
 
   /* Create new off-screen window. */
   wl_surface *wl_surface = wl_compositor_create_surface(wl_compositor());
+
+#ifdef WITH_VULKAN_BACKEND
+  const bool debug_context = (glSettings.flags & GHOST_glDebugContext) != 0;
+
+  if (glSettings.context_type == GHOST_kDrawingContextTypeVulkan) {
+    GHOST_Context *context = new GHOST_ContextVK(false,
+                                                 GHOST_kVulkanPlatformWayland,
+                                                 0,
+                                                 NULL,
+                                                 wl_surface,
+                                                 display_->wl_display,
+                                                 1,
+                                                 0,
+                                                 debug_context);
+
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return nullptr;
+    }
+    return context;
+  }
+#else
+  (void)glSettings;
+#endif
+
   wl_egl_window *egl_window = wl_surface ? wl_egl_window_create(wl_surface, 1, 1) : nullptr;
 
   GHOST_Context *context = createOffscreenContext_impl(this, display_->wl_display, egl_window);

intern/ghost/intern/GHOST_SystemWin32.cpp

@@ -37,6 +37,9 @@
 #include "GHOST_WindowWin32.h"
 
 #include "GHOST_ContextWGL.h"
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
 
 #ifdef WITH_INPUT_NDOF
 #  include "GHOST_NDOFManagerWin32.h"
@@ -256,7 +259,20 @@ GHOST_IContext *GHOST_SystemWin32::createOffscreenContext(GHOST_GLSettings glSet
 {
   const bool debug_context = (glSettings.flags & GHOST_glDebugContext) != 0;
 
-  GHOST_Context *context;
+  GHOST_Context *context = nullptr;
+
+#ifdef WITH_VULKAN_BACKEND
+  /* Vulkan does not need a window. */
+  if (glSettings.context_type == GHOST_kDrawingContextTypeVulkan) {
+    context = new GHOST_ContextVK(false, (HWND)0, 1, 0, debug_context);
+
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return nullptr;
+    }
+    return context;
+  }
+#endif
 
   HWND wnd = CreateWindowA("STATIC",
                            "BlenderGLEW",

intern/ghost/intern/GHOST_SystemX11.cpp

@@ -36,6 +36,10 @@
 #include "GHOST_ContextEGL.h"
 #include "GHOST_ContextGLX.h"
 
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
+
 #ifdef WITH_XF86KEYSYM
 #  include <X11/XF86keysym.h>
 #endif
@@ -431,8 +435,20 @@ GHOST_IContext *GHOST_SystemX11::createOffscreenContext(GHOST_GLSettings glSetti
    *   no fall-backs. */
 
   const bool debug_context = (glSettings.flags & GHOST_glDebugContext) != 0;
+  GHOST_Context *context = nullptr;
 
-  GHOST_Context *context;
+#ifdef WITH_VULKAN_BACKEND
+  if (glSettings.context_type == GHOST_kDrawingContextTypeVulkan) {
+    context = new GHOST_ContextVK(
+        false, GHOST_kVulkanPlatformX11, 0, m_display, NULL, NULL, 1, 0, debug_context);
+
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return nullptr;
+    }
+    return context;
+  }
+#endif
 
 #ifdef USE_EGL
   /* Try to initialize an EGL context. */

intern/ghost/intern/GHOST_Window.cpp

@@ -77,6 +77,11 @@ GHOST_TSuccess GHOST_Window::setDrawingContextType(GHOST_TDrawingContextType typ
   return GHOST_kSuccess;
 }
 
+GHOST_IContext *GHOST_Window::getDrawingContext()
+{
+  return m_context;
+}
+
 GHOST_TSuccess GHOST_Window::swapBuffers()
 {
   return m_context->swapBuffers();
@@ -102,6 +107,17 @@ uint GHOST_Window::getDefaultFramebuffer()
   return (m_context) ? m_context->getDefaultFramebuffer() : 0;
 }
 
+GHOST_TSuccess GHOST_Window::getVulkanBackbuffer(void *image,
+                                                 void *framebuffer,
+                                                 void *command_buffer,
+                                                 void *render_pass,
+                                                 void *extent,
+                                                 uint32_t *fb_id)
+{
+  return m_context->getVulkanBackbuffer(
+      image, framebuffer, command_buffer, render_pass, extent, fb_id);
+}
+
 GHOST_TSuccess GHOST_Window::activateDrawingContext()
 {
   return m_context->activateDrawingContext();

intern/ghost/intern/GHOST_Window.h

@@ -232,6 +232,12 @@ class GHOST_Window : public GHOST_IWindow {
    */
   GHOST_TSuccess setDrawingContextType(GHOST_TDrawingContextType type) override;
 
+  /**
+   * Returns the drawing context used in this window.
+   * \return The current drawing context.
+   */
+  virtual GHOST_IContext *getDrawingContext() override;
+
   /**
    * Swaps front and back buffers of a window.
    * \return A boolean success indicator.
@@ -263,6 +269,18 @@ class GHOST_Window : public GHOST_IWindow {
    */
   virtual unsigned int getDefaultFramebuffer() override;
 
+  /**
+   * Gets the Vulkan framebuffer related resource handles associated with the Vulkan context.
+   * Needs to be called after each swap events as the framebuffer will change.
+   * \return  A boolean success indicator.
+   */
+  virtual GHOST_TSuccess getVulkanBackbuffer(void *image,
+                                             void *framebuffer,
+                                             void *command_buffer,
+                                             void *render_pass,
+                                             void *extent,
+                                             uint32_t *fb_id) override;
+
   /**
    * Returns the window user data.
    * \return The window user data.

intern/ghost/intern/GHOST_WindowCocoa.mm

@@ -8,6 +8,10 @@
 
 #include "GHOST_ContextCGL.h"
 
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
+
 #include <Cocoa/Cocoa.h>
 #include <Metal/Metal.h>
 #include <QuartzCore/QuartzCore.h>
@@ -803,6 +807,19 @@ GHOST_TSuccess GHOST_WindowCocoa::setOrder(GHOST_TWindowOrder order)
 
 GHOST_Context *GHOST_WindowCocoa::newDrawingContext(GHOST_TDrawingContextType type)
 {
+#ifdef WITH_VULKAN_BACKEND
+  if (type == GHOST_kDrawingContextTypeVulkan) {
+    GHOST_Context *context = new GHOST_ContextVK(m_wantStereoVisual, m_metalLayer, 1, 0, true);
+
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return NULL;
+    }
+
+    return context;
+  }
+#endif
+
   if (type == GHOST_kDrawingContextTypeOpenGL || type == GHOST_kDrawingContextTypeMetal) {
 
     GHOST_Context *context = new GHOST_ContextCGL(

intern/ghost/intern/GHOST_WindowWayland.cpp

@@ -14,6 +14,9 @@
 
 #include "GHOST_ContextEGL.h"
 #include "GHOST_ContextNone.h"
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
 
 #include <wayland-client-protocol.h>
 
@@ -1211,6 +1214,21 @@ GHOST_Context *GHOST_WindowWayland::newDrawingContext(GHOST_TDrawingContextType
     case GHOST_kDrawingContextTypeNone:
       context = new GHOST_ContextNone(m_wantStereoVisual);
       break;
+
+#ifdef WITH_VULKAN_BACKEND
+    case GHOST_kDrawingContextTypeVulkan:
+      context = new GHOST_ContextVK(m_wantStereoVisual,
+                                    GHOST_kVulkanPlatformWayland,
+                                    0,
+                                    NULL,
+                                    window_->wl_surface,
+                                    system_->wl_display(),
+                                    1,
+                                    0,
+                                    true);
+      break;
+#endif
+
     case GHOST_kDrawingContextTypeOpenGL:
       for (int minor = 6; minor >= 0; --minor) {
         context = new GHOST_ContextEGL(system_,

intern/ghost/intern/GHOST_WindowWin32.cpp

@@ -15,6 +15,9 @@
 #include "utfconv.h"
 
 #include "GHOST_ContextWGL.h"
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
 
 #include <Dwmapi.h>
 
@@ -632,6 +635,19 @@ GHOST_Context *GHOST_WindowWin32::newDrawingContext(GHOST_TDrawingContextType ty
     return context;
   }
 
+#ifdef WITH_VULKAN_BACKEND
+  else if (type == GHOST_kDrawingContextTypeVulkan) {
+    GHOST_Context *context = new GHOST_ContextVK(false, m_hWnd, 1, 0, m_debug_context);
+
+    if (context->initializeDrawingContext()) {
+      return context;
+    }
+    else {
+      delete context;
+    }
+  }
+#endif
+
   return NULL;
 }
 

intern/ghost/intern/GHOST_WindowX11.cpp

@@ -24,6 +24,9 @@
 
 #include "GHOST_ContextEGL.h"
 #include "GHOST_ContextGLX.h"
+#ifdef WITH_VULKAN_BACKEND
+#  include "GHOST_ContextVK.h"
+#endif
 
 /* For #XIWarpPointer. */
 #ifdef WITH_X11_XINPUT
@@ -1228,6 +1231,26 @@ static GHOST_Context *create_glx_context(Window window,
 
 GHOST_Context *GHOST_WindowX11::newDrawingContext(GHOST_TDrawingContextType type)
 {
+#if defined(WITH_VULKAN)
+  if (type == GHOST_kDrawingContextTypeVulkan) {
+    GHOST_Context *context = new GHOST_ContextVK(m_wantStereoVisual,
+                                                 GHOST_kVulkanPlatformX11,
+                                                 m_window,
+                                                 m_display,
+                                                 NULL,
+                                                 NULL,
+                                                 1,
+                                                 0,
+                                                 m_is_debug_context);
+
+    if (!context->initializeDrawingContext()) {
+      delete context;
+      return nullptr;
+    }
+    return context;
+  }
+#endif
+
   if (type == GHOST_kDrawingContextTypeOpenGL) {
 
     /* During development:

source/blender/gpu/CMakeLists.txt

@@ -267,6 +267,8 @@ endif()
 
 if(WITH_VULKAN_BACKEND)
   list(APPEND SRC ${VULKAN_SRC})
+
+  add_definitions(-DWITH_VULKAN_BACKEND)
 endif()
 
 if(WITH_METAL_BACKEND)

source/blender/gpu/vulkan/vk_backend.cc

@@ -5,7 +5,7 @@
  * \ingroup gpu
  */
 
-#include "vk_backend.hh"
+#include "gpu_platform_private.hh"
 
 #include "vk_batch.hh"
 #include "vk_context.hh"
@@ -19,8 +19,36 @@
 #include "vk_uniform_buffer.hh"
 #include "vk_vertex_buffer.hh"
 
+#include "vk_backend.hh"
+
 namespace blender::gpu {
 
+void VKBackend::init_platform()
+{
+  BLI_assert(!GPG.initialized);
+
+  eGPUDeviceType device = GPU_DEVICE_ANY;
+  eGPUOSType os = GPU_OS_ANY;
+  eGPUDriverType driver = GPU_DRIVER_ANY;
+  eGPUSupportLevel support_level = GPU_SUPPORT_LEVEL_SUPPORTED;
+
+#ifdef _WIN32
+  os = GPU_OS_WIN;
+#elif defined(__APPLE__)
+  os = GPU_OS_MAC;
+#else
+  os = GPU_OS_UNIX;
+#endif
+
+  GPG.init(device, os, driver, support_level, GPU_BACKEND_VULKAN, "", "", "");
+}
+
+void VKBackend::platform_exit()
+{
+  BLI_assert(GPG.initialized);
+  GPG.clear();
+}
+
 void VKBackend::delete_resources()
 {
 }

source/blender/gpu/vulkan/vk_backend.hh

@@ -13,6 +13,16 @@ namespace blender::gpu {
 
 class VKBackend : public GPUBackend {
  public:
+  VKBackend()
+  {
+    VKBackend::init_platform();
+  }
+
+  virtual ~VKBackend()
+  {
+    VKBackend::platform_exit();
+  }
+
   void delete_resources() override;
 
   void samplers_update() override;
@@ -37,6 +47,10 @@ class VKBackend : public GPUBackend {
   void render_begin() override;
   void render_end() override;
   void render_step() override;
+
+ private:
+  static void init_platform();
+  static void platform_exit();
 };
 
 }  // namespace blender::gpu

source/blender/windowmanager/CMakeLists.txt

@@ -121,6 +121,10 @@ if(WITH_CYCLES)
   add_definitions(-DWITH_CYCLES)
 endif()
 
+if(WITH_VULKAN_BACKEND)
+  add_definitions(-DWITH_VULKAN_BACKEND)
+endif()
+
 if(WITH_OPENCOLLADA)
   add_definitions(-DWITH_COLLADA)
 endif()

source/blender/windowmanager/intern/wm_window.c

@@ -1626,6 +1626,9 @@ GHOST_TDrawingContextType wm_ghost_drawing_context_type(const eGPUBackendType gp
     case GPU_BACKEND_OPENGL:
       return GHOST_kDrawingContextTypeOpenGL;
     case GPU_BACKEND_VULKAN:
+#ifdef WITH_VULKAN_BACKEND
+      return GHOST_kDrawingContextTypeVulkan;
+#endif
       BLI_assert_unreachable();
       return GHOST_kDrawingContextTypeNone;
     case GPU_BACKEND_METAL:

source/creator/CMakeLists.txt

@@ -50,6 +50,10 @@ if(WITH_CYCLES)
   endif()
 endif()
 
+if(WITH_VULKAN_BACKEND)
+  add_definitions(-DWITH_VULKAN_BACKEND)
+endif()
+
 if(WITH_CODEC_FFMPEG)
   add_definitions(-DWITH_FFMPEG)
 endif()