-- v3: d2d1/tests: Test IsSupported() for bitmap render targets. d2d1: Implement d2d_bitmap_render_target_IsSupported(). d2d1/tests: Test IsSupported() for DC render targets. d2d1: Implement d2d_dc_render_target_IsSupported(). d2d1/tests: Test IsSupported() for hwnd render targets. d2d1: Implement d2d_hwnd_render_target_IsSupported().