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atimach64gx: Add offset to cursor X position.

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CUR_HORZ_OFF becomes non-zero when the cursor needs to be drawn to the left of the left edge of the frame buffer.

CUR_VERT_OFF is handled differently. When CUR_VERT_OFF is non-zero, CUR_OFFSET is changed to point to the first line of the cursor that will be drawn, so CUR_VERT_OFF is the number of lines to remove from the total height of the cursor.
Alternatively, we could handle CUR_VERT_OFF the same way as CUR_HORZ_OFF by leaving the cursor height constant, drawing the cursor starting from the CUR_VERT_OFF line, and adjusting cursor Y position by negative CUR_VERT_OFF.
This commit is contained in:
joevt 2024-03-20 04:56:11 -07:00 committed by dingusdev
parent 1d5502dc3c
commit 6462ceef24
1 changed files with 2 additions and 1 deletions
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3
devices/video/atimach64gx.cpp
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@ -726,7 +726,8 @@ void AtiMach64Gx::draw_hw_cursor(uint8_t *dst_buf, int dst_pitch) {
}
void AtiMach64Gx::get_cursor_position(int& x, int& y) {
x = extract_bits<uint32_t>(this->regs[ATI_CUR_HORZ_VERT_POSN], ATI_CUR_HORZ_POSN, ATI_CUR_HORZ_POSN_size);
x = extract_bits<uint32_t>(this->regs[ATI_CUR_HORZ_VERT_POSN], ATI_CUR_HORZ_POSN, ATI_CUR_HORZ_POSN_size) -
extract_bits<uint32_t>(this->regs[ATI_CUR_HORZ_VERT_OFF ], ATI_CUR_HORZ_OFF , ATI_CUR_HORZ_OFF_size );
y = extract_bits<uint32_t>(this->regs[ATI_CUR_HORZ_VERT_POSN], ATI_CUR_VERT_POSN, ATI_CUR_VERT_POSN_size);
}