Epson S1D13506 Technical Manual page 185

Epson Research and Development
Vancouver Design Center
Pattern Fill
Note
Transparent Pattern Fill
Note
Transparent Write BitBLT
Hardware Functional Specification
Issue Date: 02/03/26
The Pattern Fill BitBLT fills a specified BitBLT area with an 8 pixel by 8 line pattern in
full color defined in off-screen display buffer. The pattern data has to be stored in a
contiguous address (i.e. for 8 and 16 bpp, the pattern data will occupy 64 and 128 bytes
respectively starting from the base address).
Any pixel within the 8x8 pattern can be used to start the fill area. The least significant bits
of the source address start register are used to specify the starting pixel.
The 2D engine can detects the end of each line and continues from the beginning of the next
line. When the last line of pattern is encountered, the first line of the pattern will be drawn
on the following line.
Supports two full 16-bit operand ROP functions.
The BitBLT operation Pattern Fill with ROP requires a BitBLT width ≥ 2. The BitBLT
width is set in REG[110h], REG[111h].
The Transparent Pattern Fill fills a specified BitBLT area with an 8 pixel by 8 line pattern
in full color defined in off-screen display buffer. The pattern data has to be stored in a
contiguous address (i.e. for 8 and 16 bpp, the pattern data will occupy 64 and 128 bytes
respectively starting from the base address).
When the pattern color is equal to the key color, which is defined in Background Color
Register, the destination area is not updated. In 8 bpp mode, only the low byte of the key
color is used for comparison.
For this BitBLT no raster operation is applied.
The BitBLT operation Pattern Fill with transparency requires a BitBLT width ≥ 2. The
BitBLT width is set in REG[110h], REG[111h].
The Transparent Write BitBLT supports bit block transfers from the host to display buffer.
When the source color is equal to key color, which is defined in Background Color
Register, the destination area is not updated. In 8 bpp mode, only the low byte of the key
color is used for comparison.
For this BitBLT no raster operation is applied.
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S1D13506
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