float chroma_offset_0[] = { -0.5f / global_flags.width, 0.0f };
set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
float chroma_offset_0[] = { -0.5f / global_flags.width, 0.0f };
set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);