wined3d: Introduce wined3d_rendertarget_view_create_from_sub_resource().

dlls/d3d9/surface.c

@@ -428,8 +428,8 @@ struct wined3d_rendertarget_view *d3d9_surface_get_rendertarget_view(struct d3d9
     if (surface->wined3d_rtv)
         return surface->wined3d_rtv;
 
-    if (FAILED(hr = wined3d_rendertarget_view_create_from_surface(surface->wined3d_surface,
-            surface, &d3d9_view_wined3d_parent_ops, &surface->wined3d_rtv)))
+    if (FAILED(hr = wined3d_rendertarget_view_create_from_sub_resource(surface->wined3d_texture,
+            surface->sub_resource_idx, surface, &d3d9_view_wined3d_parent_ops, &surface->wined3d_rtv)))
     {
         ERR("Failed to create rendertarget view, hr %#x.\n", hr);
         return NULL;

dlls/wined3d/view.c

@@ -160,6 +160,28 @@ HRESULT CDECL wined3d_rendertarget_view_create_from_surface(struct wined3d_surfa
     return wined3d_rendertarget_view_create(&desc, &surface->container->resource, parent, parent_ops, view);
 }
 
+HRESULT CDECL wined3d_rendertarget_view_create_from_sub_resource(struct wined3d_texture *texture,
+        unsigned int sub_resource_idx, void *parent, const struct wined3d_parent_ops *parent_ops,
+        struct wined3d_rendertarget_view **view)
+{
+    struct wined3d_resource *sub_resource;
+
+    TRACE("texture %p, sub_resource_idx %u, parent %p, parent_ops %p, view %p.\n",
+            texture, sub_resource_idx, parent, parent_ops, view);
+
+    if (!(sub_resource = wined3d_texture_get_sub_resource(texture, sub_resource_idx)))
+        return WINED3DERR_INVALIDCALL;
+
+    if (sub_resource->type != WINED3D_RTYPE_SURFACE)
+    {
+        FIXME("Not implemented for %s resources.\n", debug_d3dresourcetype(texture->resource.type));
+        return WINED3DERR_INVALIDCALL;
+    }
+
+    return wined3d_rendertarget_view_create_from_surface(surface_from_resource(sub_resource),
+            parent, parent_ops, view);
+}
+
 ULONG CDECL wined3d_shader_resource_view_incref(struct wined3d_shader_resource_view *view)
 {
     ULONG refcount = InterlockedIncrement(&view->refcount);

dlls/wined3d/wined3d.spec

@@ -187,6 +187,7 @@
 
 @ cdecl wined3d_rendertarget_view_create(ptr ptr ptr ptr ptr)
 @ cdecl wined3d_rendertarget_view_create_from_surface(ptr ptr ptr ptr)
+@ cdecl wined3d_rendertarget_view_create_from_sub_resource(ptr long ptr ptr ptr)
 @ cdecl wined3d_rendertarget_view_decref(ptr)
 @ cdecl wined3d_rendertarget_view_get_parent(ptr)
 @ cdecl wined3d_rendertarget_view_get_resource(ptr)

include/wine/wined3d.h

@@ -2430,6 +2430,9 @@ HRESULT __cdecl wined3d_rendertarget_view_create(const struct wined3d_rendertarg
         struct wined3d_rendertarget_view **view);
 HRESULT __cdecl wined3d_rendertarget_view_create_from_surface(struct wined3d_surface *surface,
         void *parent, const struct wined3d_parent_ops *parent_ops, struct wined3d_rendertarget_view **view);
+HRESULT __cdecl wined3d_rendertarget_view_create_from_sub_resource(struct wined3d_texture *texture,
+        unsigned int sub_resource_idx, void *parent, const struct wined3d_parent_ops *parent_ops,
+        struct wined3d_rendertarget_view **view);
 ULONG __cdecl wined3d_rendertarget_view_decref(struct wined3d_rendertarget_view *view);
 void * __cdecl wined3d_rendertarget_view_get_parent(const struct wined3d_rendertarget_view *view);
 struct wined3d_resource * __cdecl wined3d_rendertarget_view_get_resource(const struct wined3d_rendertarget_view *view);