wined3d: Assign a read buffer when discarding a new texture.

stefand · stefand · commit a3b0ab48b13f · 2016-05-25T20:07:37.000+01:00
Otherwise we'll try to call glDeleteBuffers(1, NULL). Alternatively I
could check for NULL in wined3d_texture_changed, but I prefer to keep
buffer and map_buffer consistent instead.
diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
@@ -1644,6 +1644,8 @@ void *wined3d_texture_map_internal(struct wined3d_texture *texture, unsigned int
             case WINED3D_LOCATION_BUFFER:
                 sub_resource->map_buffer = wined3d_device_get_bo(device, sub_resource->size,
                         GL_STREAM_DRAW, GL_PIXEL_UNPACK_BUFFER, context);
+                if (!sub_resource->buffer)
+                    sub_resource->buffer = sub_resource->map_buffer;
                 ret = !!sub_resource->map_buffer;
                 break;
 
