gallium/vl: Add vl_winsys_win32 support

Acked-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19063>

src/gallium/auxiliary/meson.build

@@ -438,8 +438,12 @@ files_libgalliumvl = files(
 )
 
 vlwinsys_deps = []
-files_libgalliumvlwinsys = files('vl/vl_winsys.h',
-                                 'vl/vl_winsys_drm.c')
+files_libgalliumvlwinsys = files('vl/vl_winsys.h')
+if host_machine.system() == 'windows'
+  files_libgalliumvlwinsys += files('vl/vl_winsys_win32.c')
+else
+  files_libgalliumvlwinsys += files('vl/vl_winsys_drm.c')
+endif
 if with_dri2 and with_platform_x11
   files_libgalliumvlwinsys += files('vl/vl_winsys_dri.c')
   if with_dri3

src/gallium/auxiliary/vl/vl_winsys.h

@@ -35,6 +35,9 @@
 #ifdef HAVE_X11_PLATFORM
 #include <X11/Xlib.h>
 #endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
 #include "pipe/p_defines.h"
 #include "pipe/p_format.h"
 
@@ -92,6 +95,9 @@ static inline struct vl_screen *
 vl_dri3_screen_create(void *display, int screen) { return NULL; };
 #endif
 
+#ifdef _WIN32
+struct vl_screen *vl_win32_screen_create(LUID *adapter);
+#else
 /* Always enable the DRM vl winsys */
 struct vl_screen *
 vl_drm_screen_create(int fd);
@@ -107,5 +113,6 @@ vl_vgem_drm_screen_create(int fd);
 static inline struct vl_screen *
 vl_xlib_swrast_screen_create(void *display, int screen) { return NULL; }
 #endif
+#endif
 
 #endif

src/gallium/auxiliary/vl/vl_winsys_win32.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright © Microsoft Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#include "pipe-loader/pipe_loader.h"
+#include "pipe/p_screen.h"
+
+#include "util/u_memory.h"
+#include "vl/vl_winsys.h"
+
+#include "gallium/winsys/sw/gdi/gdi_sw_winsys.h"
+#include "gallium/drivers/d3d12/d3d12_public.h"
+
+struct vl_win32_screen
+{
+   struct vl_screen base;
+   LUID *adapter_luid;
+};
+
+static void
+vl_win32_screen_destroy(struct vl_screen *vscreen)
+{
+   if (vscreen == NULL)
+      return;
+
+   struct vl_win32_screen *win32_screen = (struct vl_win32_screen *) vscreen;
+
+   if (vscreen->pscreen)
+      vscreen->pscreen->destroy(vscreen->pscreen);
+
+   if (vscreen->dev)
+      pipe_loader_release(&vscreen->dev, 1);
+
+   FREE(vscreen);
+}
+
+struct vl_screen *
+vl_win32_screen_create(LUID *adapter)
+{
+   struct vl_win32_screen *vscreen = CALLOC_STRUCT(vl_win32_screen);
+   if (!vscreen)
+      return NULL;
+
+   struct sw_winsys* winsys = gdi_create_sw_winsys();
+   if (!winsys)
+      goto release_pipe;
+
+   /* If adapter is null, d3d12_create_dxcore_screen will choose one */
+   vscreen->base.pscreen = d3d12_create_dxcore_screen(winsys, adapter);
+
+   if (!vscreen->base.pscreen)
+      goto release_pipe;
+
+   vscreen->adapter_luid = adapter;
+
+   vscreen->base.destroy = vl_win32_screen_destroy;
+   vscreen->base.get_private = NULL;
+   vscreen->base.texture_from_drawable = NULL;
+   vscreen->base.get_dirty_area = NULL;
+
+   return &vscreen->base;
+
+release_pipe:
+   vl_win32_screen_destroy(&vscreen->base);
+   return NULL;
+}