Matteo Bruni (@Mystral) commented about dlls/d3dx9_36/tests/surface.c:
} info_tests[] = { /* 15 bpp true color. */ { { 0, COLORMAP_TYPE_NONE, IMAGETYPE_TRUECOLOR, 0, 0, 0, 0, 0, 4, 4, 15, 0 },
{ D3D_OK, 4, 4, D3DFMT_X1R5G5B5 }, .todo_hr = TRUE
I haven't checked but, if there are no more of these tests coming, we could get rid of the `todo_` fields entirely.