[gtk+] GDK/Win32: Support Vulkan context creation

[Chun-wei Fan <fanchunwei src gnome org>]

commit c4244ea10408d5a4b6e8c0b4894d71863362559a
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Wed Dec 28 22:25:07 2016 +0800

    GDK/Win32: Support Vulkan context creation
    
    This adds support to the GDK Win32 backend so that we can support Vulkan
    context creation for use in the GSK Vulkan renderer, so that we can test
    it on Windows platforms as well.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=776544

 gdk/win32/Makefile.am              |    2 +
 gdk/win32/gdkdisplay-win32.c       |    7 +++
 gdk/win32/gdkvulkancontext-win32.c |   79 ++++++++++++++++++++++++++++++++++++
 gdk/win32/gdkvulkancontext-win32.h |   62 ++++++++++++++++++++++++++++
 4 files changed, 150 insertions(+), 0 deletions(-)
---
diff --git a/gdk/win32/Makefile.am b/gdk/win32/Makefile.am
index ebd4ae6..4497429 100644
--- a/gdk/win32/Makefile.am
+++ b/gdk/win32/Makefile.am
@@ -55,6 +55,8 @@ libgdk_win32_la_SOURCES = \
        gdkscreen-win32.c \
        gdkselection-win32.c \
        gdktestutils-win32.c \
+       gdkvulkancontext-win32.c \
+       gdkvulkancontext-win32.h \
        gdkwin32cursor.h \
        gdkwin32display.h \
        gdkwin32displaymanager.h \
diff --git a/gdk/win32/gdkdisplay-win32.c b/gdk/win32/gdkdisplay-win32.c
index 03eabd8..10ae262 100644
--- a/gdk/win32/gdkdisplay-win32.c
+++ b/gdk/win32/gdkdisplay-win32.c
@@ -19,6 +19,7 @@
 #include "config.h"
 
 #define _WIN32_WINNT 0x0600
+#define VK_USE_PLATFORM_WIN32_KHR
 
 #include "gdk.h"
 #include "gdkprivate-win32.h"
@@ -30,6 +31,7 @@
 #include "gdkwin32window.h"
 #include "gdkmonitor-win32.h"
 #include "gdkwin32.h"
+#include "gdkvulkancontext-win32.h"
 
 #include <dwmapi.h>
 
@@ -1282,5 +1284,10 @@ gdk_win32_display_class_init (GdkWin32DisplayClass *klass)
   display_class->get_monitor = gdk_win32_display_get_monitor;
   display_class->get_primary_monitor = gdk_win32_display_get_primary_monitor;
 
+#ifdef GDK_RENDERING_VULKAN
+  display_class->vk_context_type = GDK_TYPE_WIN32_VULKAN_CONTEXT;
+  display_class->vk_extension_name = VK_KHR_WIN32_SURFACE_EXTENSION_NAME;
+#endif
+
   _gdk_win32_windowing_init ();
 }
diff --git a/gdk/win32/gdkvulkancontext-win32.c b/gdk/win32/gdkvulkancontext-win32.c
new file mode 100644
index 0000000..edf735d
--- /dev/null
+++ b/gdk/win32/gdkvulkancontext-win32.c
@@ -0,0 +1,79 @@
+/* GDK - The GIMP Drawing Kit
+ *
+ * gdkvulkancontext-win32.c: Win32 specific Vulkan wrappers
+ *
+ * Copyright © 2016  Benjamin Otte
+ * Copyright © 2016  Chun-wei Fan
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gdkconfig.h"
+
+#ifdef GDK_RENDERING_VULKAN
+
+#include "gdkvulkancontext-win32.h"
+
+#include "gdkprivate-win32.h"
+#include "gdkwin32misc.h"
+
+extern HINSTANCE        _gdk_dll_hinstance;
+
+G_DEFINE_TYPE (GdkWin32VulkanContext, gdk_win32_vulkan_context, GDK_TYPE_VULKAN_CONTEXT)
+
+static VkResult
+gdk_win32_vulkan_context_create_surface (GdkVulkanContext *context,
+                                         VkSurfaceKHR     *surface)
+{
+  GdkWindow *window = gdk_draw_context_get_window (GDK_DRAW_CONTEXT (context));
+  GdkDisplay *display = gdk_draw_context_get_display (GDK_DRAW_CONTEXT (context));
+  VkWin32SurfaceCreateInfoKHR info;
+
+  info.sType = VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR;
+  info.pNext = NULL;
+  info.flags = 0;
+  info.hinstance = _gdk_dll_hinstance;
+  info.hwnd = GDK_WINDOW_HWND (window);
+
+  /* This is necessary so that Vulkan sees the Window.
+   * Usually, vkCreateWin32SurfaceKHR() will not cause a problem to happen as
+   * it just creates resources, but futher calls with the resulting surface
+   * do cause issues.
+   */
+  gdk_display_sync (display);
+
+  return GDK_VK_CHECK (vkCreateWin32SurfaceKHR,
+                       gdk_vulkan_context_get_instance (context),
+                       &info,
+                       NULL,
+                       surface);
+}
+
+static void
+gdk_win32_vulkan_context_class_init (GdkWin32VulkanContextClass *klass)
+{
+  GdkVulkanContextClass *context_class = GDK_VULKAN_CONTEXT_CLASS (klass);
+
+  context_class->create_surface = gdk_win32_vulkan_context_create_surface;
+}
+
+static void
+gdk_win32_vulkan_context_init (GdkWin32VulkanContext *self)
+{
+}
+
+#endif /* GDK_RENDERING_VULKAN */
+
diff --git a/gdk/win32/gdkvulkancontext-win32.h b/gdk/win32/gdkvulkancontext-win32.h
new file mode 100644
index 0000000..f93c45c
--- /dev/null
+++ b/gdk/win32/gdkvulkancontext-win32.h
@@ -0,0 +1,62 @@
+/* GDK - The GIMP Drawing Kit
+ *
+ * gdkvulkancontext-win32.h: Win32 specific Vulkan wrappers
+ *
+ * Copyright © 2016  Benjamin Otte
+ * Copyright © 2016  Chun-wei Fan
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GDK_WIN32_VULKAN_CONTEXT__
+#define __GDK_WIN32_VULKAN_CONTEXT__
+
+#include "gdkconfig.h"
+
+#ifdef GDK_RENDERING_VULKAN
+
+#define VK_USE_PLATFORM_WIN32_KHR
+
+#include "gdkvulkancontextprivate.h"
+
+G_BEGIN_DECLS
+
+#define GDK_TYPE_WIN32_VULKAN_CONTEXT            (gdk_win32_vulkan_context_get_type ())
+#define GDK_WIN32_VULKAN_CONTEXT(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), 
GDK_TYPE_WIN32_VULKAN_CONTEXT, GdkWin32VulkanContext))
+#define GDK_IS_WIN32_VULKAN_CONTEXT(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), 
GDK_TYPE_WIN32_VULKAN_CONTEXT))
+#define GDK_WIN32_VULKAN_CONTEXT_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), 
GDK_TYPE_WIN32_VULKAN_CONTEXT, GdkWin32VulkanContextClass))
+#define GDK_IS_WIN32_VULKAN_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), 
GDK_TYPE_WIN32_VULKAN_CONTEXT))
+#define GDK_WIN32_VULKAN_CONTEXT_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), 
GDK_TYPE_WIN32_VULKAN_CONTEXT, GdkWin32VulkanContextClass))
+
+typedef struct _GdkWin32VulkanContext      GdkWin32VulkanContext;
+typedef struct _GdkWin32VulkanContextClass GdkWin32VulkanContextClass;
+
+struct _GdkWin32VulkanContext
+{
+  GdkVulkanContext parent_instance;
+};
+
+struct _GdkWin32VulkanContextClass
+{
+  GdkVulkanContextClass parent_class;
+};
+
+GDK_AVAILABLE_IN_3_90
+GType gdk_win32_vulkan_context_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* !GDK_RENDERING_VULKAN */
+
+#endif /* __GDK_WIN32_VULKAN_CONTEXT__ */