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MB86R02 'Jade-D' Hardware Manual V1.64
BLT/Rectangle drawing
This function draws a rectangle using logic operations. It is used to draw pattern and copy the
image pattern within the drawing frame. It is also used for clearing drawing frame and Z buffer.
Attribute
Raster operation
Transparent processing
Alpha blending
Pattern (Text) drawing
This function draws a binary pattern (text) in a specified color.
Attribute
Enlarge
Shrink
Drawing clipping
This function sets a rectangular area in the drawing frame to prohibit drawing outside the frame.
18-6
BLT Attributes
Description
Selects dual source logical operation mode
Performs BLT without drawing pixel consistent with the
transparent color.
The alpha map and source in the memory is subjected to alpha
blending and then copied to the destination.
Pattern (Text) Drawing Attributes
Description
Vertically × 2
Horizontally × 2
Vertically and Horizontally × 2
Vertically × 1/2
Horizontally 1/2
Vertically and Horizontally 1/2
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