gallium, windows: Use HANDLE instead of FD for external objects

Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Bill Kristiansen <billkris@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13054>

src/gallium/drivers/llvmpipe/lp_texture.c

@@ -1103,7 +1103,7 @@ llvmpipe_resource_get_param(struct pipe_screen *screen,
 
       if (!llvmpipe_resource_get_handle(screen, context, resource, &whandle, handle_usage))
          return false;
-      *value = whandle.handle;
+      *value = (uint64_t)whandle.handle;
       return true;
    default:
       break;

src/gallium/drivers/zink/zink_resource.c

@@ -668,6 +668,7 @@ resource_object_create(struct zink_screen *screen, const struct pipe_resource *t
       mai.pNext = &emai;
    }
 
+#ifdef ZINK_USE_DMABUF
    VkImportMemoryFdInfoKHR imfi = {
       VK_STRUCTURE_TYPE_IMPORT_MEMORY_FD_INFO_KHR,
       NULL,
@@ -685,6 +686,7 @@ resource_object_create(struct zink_screen *screen, const struct pipe_resource *t
       imfi.pNext = mai.pNext;
       mai.pNext = &imfi;
    }
+#endif
 
    struct wsi_memory_allocate_info memory_wsi_info = {
       VK_STRUCTURE_TYPE_WSI_MEMORY_ALLOCATE_INFO_MESA,
@@ -931,6 +933,7 @@ zink_resource_get_param(struct pipe_screen *pscreen, struct pipe_context *pctx,
    case PIPE_RESOURCE_PARAM_HANDLE_TYPE_SHARED:
    case PIPE_RESOURCE_PARAM_HANDLE_TYPE_KMS:
    case PIPE_RESOURCE_PARAM_HANDLE_TYPE_FD: {
+#ifdef ZINK_USE_DMABUF
       memset(&whandle, 0, sizeof(whandle));
       if (param == PIPE_RESOURCE_PARAM_HANDLE_TYPE_SHARED)
          whandle.type = WINSYS_HANDLE_TYPE_SHARED;
@@ -944,6 +947,10 @@ zink_resource_get_param(struct pipe_screen *pscreen, struct pipe_context *pctx,
 
       *value = whandle.handle;
       break;
+#else
+      (void)whandle;
+      return false;
+#endif
    }
    }
    return true;

src/gallium/include/frontend/winsys_handle.h

@@ -2,6 +2,10 @@
 #ifndef _WINSYS_HANDLE_H_
 #define _WINSYS_HANDLE_H_
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -9,6 +13,8 @@ extern "C" {
 #define WINSYS_HANDLE_TYPE_SHARED 0
 #define WINSYS_HANDLE_TYPE_KMS    1
 #define WINSYS_HANDLE_TYPE_FD     2
+/* Win32 handles serve the same purpose as FD, just on Windows, so alias the value */
+#define WINSYS_HANDLE_TYPE_WIN32_HANDLE WINSYS_HANDLE_TYPE_FD
 #define WINSYS_HANDLE_TYPE_SHMID   3
 #define WINSYS_HANDLE_TYPE_D3D12_RES 4
 
@@ -38,7 +44,11 @@ struct winsys_handle
     * Input to texture_from_handle.
     * Output for texture_get_handle.
     */
+#ifdef _WIN32
+   HANDLE handle;
+#else
    unsigned handle;
+#endif
    /**
     * Input to texture_from_handle.
     * Output for texture_get_handle.

src/mesa/state_tracker/st_cb_memoryobjects.c

@@ -70,6 +70,7 @@ st_import_memoryobj_fd(struct gl_context *ctx,
                        GLuint64 size,
                        int fd)
 {
+#if !defined(_WIN32)
    struct st_memory_object *st_obj = st_memory_object(obj);
    struct st_context *st = st_context(ctx);
    struct pipe_screen *screen = st->screen;
@@ -85,7 +86,6 @@ st_import_memoryobj_fd(struct gl_context *ctx,
                                                       &whandle,
                                                       obj->Dedicated);
 
-#if !defined(_WIN32)
    /* We own fd, but we no longer need it. So get rid of it */
    close(fd);
 #endif

src/mesa/state_tracker/st_extensions.c

@@ -844,7 +844,9 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(EXT_disjoint_timer_query),         PIPE_CAP_QUERY_TIMESTAMP                  },
       { o(EXT_draw_buffers2),                PIPE_CAP_INDEP_BLEND_ENABLE               },
       { o(EXT_memory_object),                PIPE_CAP_MEMOBJ                           },
+#ifndef _WIN32
       { o(EXT_memory_object_fd),             PIPE_CAP_MEMOBJ                           },
+#endif
       { o(EXT_multisampled_render_to_texture), PIPE_CAP_SURFACE_SAMPLE_COUNT           },
       { o(EXT_semaphore),                    PIPE_CAP_FENCE_SIGNAL                     },
       { o(EXT_semaphore_fd),                 PIPE_CAP_FENCE_SIGNAL                     },