Just to document the convertion between rgb24 and planar rgb..

R0  G0  B0  R1  G1  B1  R2  G2  B2  R3  G3  B3  R4  G4  B4  R5 
G5  B5  R6  G6  B6  R7  G7  B7  R8  G8  B8  R9  G9  B9  R10 G10
B10 R11 G11 B11 R12 G12 B12 R13 G13 B13 R14 G14 B14 R15 G15 B15
R16 G16 B16 R17 G17 B17 R18 G18 B18 R19 G19 B19 R20 G20 B20 R21
G21 B21 R22 G22 B22 R23 G23 B23 R24 G24 B24 R25 G25 B25 R26 G26
B26 R27 G27 B27 R28 G28 B28 R29 G29 B29 R30 G30 B30 R31 G31 B31

R0  R16 G0  G16 B0  B16 R1  R17 G1  G17 B1  B17 R2  R18 G2  G18
B2  B18 R3  R19 G3  G19 B3  B19 R4  R20 G4  G20 B4  B20 R5  R21
G5  G21 B5  B21 R6  R22 G6  G22 B6  B22 R7  R23 G7  G23 B7  B23
R8  R24 G8  G24 B8  B24 R9  R25 G9  G25 B9  B25 R10 R26 G10 G26
B10 B26 R11 R27 G11 G27 B11 B27 R12 R28 G12 G28 B12 B28 R13 R29
G13 G29 B13 B29 R14 R30 G14 G30 B14 B30 R15 R31 G15 G31 B15 B31

R0  R8  R16 R24 G0  G8  G16 G24 B0  B8  B16 B24 R1  R9  R17 R25
G1  G9  G17 G25 B1  B9  B17 B25 R2  R10 R18 R26 G2  G10 G18 G26
B2  B10 B18 B26 R3  R11 R19 R27 G3  G11 G19 G27 B3  B11 B19 B27
R4  R12 R20 R28 G4  G12 G20 G28 B4  B12 B20 B28 R5  R13 R21 R29
G5  G13 G21 G29 B5  B13 B21 B29 R6  R14 R22 R30 G6  G14 G22 G30
B6  B14 B22 B30 R7  R15 R23 R31 G7  G15 G23 G31 B7  B15 B23 B31

R0  R4  R8  R12 R16 R20 R24 R28 G0  G4  G8  G12 G16 G20 G24 G28
B0  B4  B8  B12 B16 B20 B24 B28 R1  R5  R9  R13 R17 R21 R25 R29
G1  G5  G9  G13 G17 G21 G25 G29 B1  B5  B9  B13 B17 B21 B25 B29
R2  R6  R10 R14 R18 R22 R26 R30 G2  G6  G10 G14 G18 G22 G26 G30
B2  B6  B10 B14 B18 B22 B26 B30 R3  R7  R11 R15 R19 R23 R27 R31
G3  G7  G11 G15 G19 G23 G27 G31 B3  B7  B11 B15 B19 B23 B27 B31

R0  R2  R4  R6  R8  R10 R12 R14 R16 R18 R20 R22 R24 R26 R28 R30
G0  G2  G4  G6  G8  G10 G12 G14 G16 G18 G20 G22 G24 G26 G28 G30
B0  B2  B4  B6  B8  B10 B12 B14 B16 B18 B20 B22 B24 B26 B28 B30
R1  R3  R5  R7  R9  R11 R13 R15 R17 R19 R21 R23 R25 R27 R29 R31
G1  G3  G5  G7  G9  G11 G13 G15 G17 G19 G21 G23 G25 G27 G29 G31
B1  B3  B5  B7  B9  B11 B13 B15 B17 B19 B21 B23 B25 B27 B29 B31

R0  R1  R2  R3  R4  R5  R6  R7  R8  R9  R10 R11 R12 R13 R14 R15
R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31
G0  G1  G2  G3  G4  G5  G6  G7  G8  G9  G10 G11 G12 G13 G14 G15
G16 G17 G18 G19 G20 G21 G22 G23 G24 G25 G26 G27 G28 G29 G30 G31
B0  B1  B2  B3  B4  B5  B6  B7  B8  B9  B10 B11 B12 B13 B14 B15
B16 B17 B18 B19 B20 B21 B22 B23 B24 B25 B26 B27 B28 B29 B30 B31