NEC µPD72257 Preliminary User's Manual page 246

Chapter 8
Mode
SRC_ONE DST_ONE
SRC_ONE
SRC_ONEDST_ALPHA
SRC_ONE DST_ONE_MINUS_ALPHA
SRC_ZERO DST_ONE
SRC_ZERO DST_ZERO
SRC_ZERO DST_ALPHA
SRC_ZERO DST_ONE_MINUS_ALPHA
SRC_ALPHA DST_ONE
SRC_ALPHA
SRC_ALPHA DST_ALPHA
SRC_ALPHA DST_ONE_MINUS_ALPHA
SRC_ONE_MINUS_ALPHA DST_ONE
SRC_ONE_MINUS_ALPHA
SRC_ONE_MINUS_ALPHA DST_ALPHA
SRC_ONE_MINUS_ALPHA
DST_ONE_MINUS_ALPHA
246
All possible blend modes are listed here:
BSF BSI BDF BDI Blend equation
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Preliminary User's Manual S19203EE1V3UM00
0 0 0 SRC + DST
0 0 1 SRC
0 1 0 SRC + DST*ALPHA
0 1 1 SRC + DST * ( 1 - ALPHA )
1 0 0 DST
1 0 1 0
1 1 0 DST * ALPHA
1 1 1 DST * ( 1 - ALPHA )
0 0 0 SRC * ALPHA + DST
0 0 1 SRC * ALPHA
0 1 0 SRC * ALPHA + DST * ALPHA
0 1 1 SRC * ALPHA + DST * ( 1 - ALPHA )
1 0 0 SRC * ( 1 - ALPHA ) + DST
1 0 1 SRC * ( 1 - ALPHA )
1 1 0 SRC * ( 1 - ALPHA ) + DST * ALPHA
1 1 1 SRC * ( 1 - ALPHA ) + DST * ( 1 - ALPHA )
Drawing Engine