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Create a helper function qxl_dirty_one_surface() to mark a single qxl surface as dirty. Use the new qxl_get_check_slot_offset function and lookup the memory region from the slot instead of assuming the surface is stored in vram. Use the new helper function in qxl_dirty_surfaces, for both primary and off-screen surfaces. For off-screen surfaces this is no functional change. For primary surfaces this will dirty only the memory actually used instead of the whole surface0 region. It will also work correctly in case the guest places the primary surface in vram instead of the surface0 region (linux kms driver does that). https://bugzilla.redhat.com/show_bug.cgi?id=1235732 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-id: 1466597244-5938-3-git-send-email-kraxel@redhat.com
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