Graphic Orders
BLT2UB_XD
13-36
MC68322 USER’S MANUAL
MOTOROLA
BLT2UB_XD
Expanded Source, Destination bitBLT to Unbanded Bitmap
The BLT2UB_XD graphic order transfers a low resolution source frame to a destination
unbanded bitmap. Before being combined with the destination, the source frame is scaled
to match the resolution of the destination bitmap. This results in an intermediate expanded
source bitmap. The pixels of the expanded source and destination bit maps are combined
as specified by the Boolean code set in the last SET_BOOL_SD order. The SET_UBMAP
graphic order must previously define the destination bitmap warp.
The DA parameter specifies the physical bit address of the area or transfer frame within the
destination unbanded bitmap. The entire transfer frame must be within the bounds of the
banded bitmap. DA must point to the upper left corner of the transfer frame. The warp of the
destination unbanded bitmap is set by the SET_UBMAP graphic order, which allows the
bitmap to be packed or unpacked.
The FW and FH parameters define the area of the destination bitmap on which the operation
is performed. FW is the frame width in bits and at a maximum equals the quantity
W
× (XMUL + 1) where W is the width of the unexpanded source bitmap. FH is the frame
height in scanlines and at a maximum equals the quantity H
× (YMUL + 1) where H is the
height of the unexpanded source bitmap. Specifying FW and FH as defined above causes
the entire expanded source image to be combined with the destination bitmap. Specifying
an FW and/or FH value less than the values defined by the above equations causes only a
portion of the expanded source frame to be applied to the destination. When used in
combination with XOFF and YOFF, clipping can be affected at any or all extents of the
expanded source bitmap.
The SA parameter defines the unexpanded source bitmap bit address. It must point to the
upper left corner of the bitmap. The warp of the bitmap is set by the SW operand. This value
is added to SA to locate the beginning of each successive scanline. Note that the source
warp set by the SET_SBMAP graphic order has no effect on this graphic order.
PARAMETERS
SIZE
DESCRIPTION
0x26
0x00
DA
FW
FH
SA
SW
XOFF:XMUL
YOFF:YMUL
Byte
Long Word
Word
Long Word
Word
Two 4-bit Fields
BLT2UB_XD Opcode.
Reserved.
Destination physical bit address.
Destination frame width in bits.
Destination frame height in scanlines.
Unexpanded source physical bit address.
Unexpanded source frame warp in bits.
X offset and X multiplier in bits.
Y offset and Y multiplier in scanlines.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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