wined3d: Add support for buffers in wined3d_device_copy_sub_resource().

dlls/wined3d/device.c

@@ -3922,6 +3922,14 @@ HRESULT CDECL wined3d_device_copy_sub_resource_region(struct wined3d_device *dev
             device, dst_resource, dst_sub_resource_idx, dst_x, dst_y, dst_z,
             src_resource, src_sub_resource_idx, debug_box(src_box));
 
+    if (src_box && (src_box->left >= src_box->right
+            || src_box->top >= src_box->bottom
+            || src_box->front >= src_box->back))
+    {
+        WARN("Invalid box %s specified.\n", debug_box(src_box));
+        return WINED3DERR_INVALIDCALL;
+    }
+
     if (src_resource == dst_resource && src_sub_resource_idx == dst_sub_resource_idx)
     {
         WARN("Source and destination are the same sub-resource.\n");
@@ -3944,6 +3952,46 @@ HRESULT CDECL wined3d_device_copy_sub_resource_region(struct wined3d_device *dev
         return WINED3DERR_INVALIDCALL;
     }
 
+    if (dst_resource->type == WINED3D_RTYPE_BUFFER)
+    {
+        unsigned int src_offset, size;
+
+        if (dst_sub_resource_idx)
+        {
+            WARN("Invalid dst_sub_resource_idx %u.\n", dst_sub_resource_idx);
+            return WINED3DERR_INVALIDCALL;
+        }
+        if (src_sub_resource_idx)
+        {
+            WARN("Invalid src_sub_resource_idx %u.\n", src_sub_resource_idx);
+            return WINED3DERR_INVALIDCALL;
+        }
+
+        if (src_box)
+        {
+            src_offset = src_box->left;
+            size = src_box->right - src_box->left;
+        }
+        else
+        {
+            src_offset = 0;
+            size = src_resource->size;
+        }
+
+        if (src_offset > src_resource->size
+                || size > src_resource->size - src_offset
+                || dst_x > dst_resource->size
+                || size > dst_resource->size - dst_x)
+        {
+            WARN("Invalid range specified, dst_offset %u, src_offset %u, size %u.\n",
+                    dst_x, src_offset, size);
+            return WINED3DERR_INVALIDCALL;
+        }
+
+        return wined3d_buffer_copy(buffer_from_resource(dst_resource), dst_x,
+                buffer_from_resource(src_resource), src_offset, size);
+    }
+
     if (dst_resource->type != WINED3D_RTYPE_TEXTURE_2D)
     {
         FIXME("Not implemented for %s resources.\n", debug_d3dresourcetype(dst_resource->type));
@@ -3967,19 +4015,9 @@ HRESULT CDECL wined3d_device_copy_sub_resource_region(struct wined3d_device *dev
     src_surface = surface_from_resource(tmp);
 
     if (src_box)
-    {
-        if (src_box->front >= src_box->back)
-        {
-            WARN("Invalid box %s specified.\n", debug_box(src_box));
-            return WINED3DERR_INVALIDCALL;
-        }
-
         SetRect(&src_rect, src_box->left, src_box->top, src_box->right, src_box->bottom);
-    }
     else
-    {
         SetRect(&src_rect, 0, 0, src_surface->resource.width, src_surface->resource.height);
-    }
 
     SetRect(&dst_rect, dst_x, dst_y, dst_x + (src_rect.right - src_rect.left),
             dst_y + (src_rect.bottom - src_rect.top));