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c64: graphics.horizontal_line() is romable

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Irmen de Jong
2025-04-17 00:02:17 +02:00
parent 4fbd67ff99
commit 1a07129865
2 changed files with 20 additions and 24 deletions
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34
compiler/res/prog8lib/c64/graphics.p8
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@@ -192,8 +192,8 @@ graphics {
}
if length!=0 {
; TODO: Romable
%asm {{
_pixeladdr = P8ZP_SCRATCH_W1
lda p8v_length
and #7
sta p8v_separate_pixels
@@ -204,37 +204,35 @@ graphics {
lsr p8v_length+1
ror p8v_length
lda p8v_pixaddr
sta _modified+1
sta _pixeladdr
lda p8v_pixaddr+1
sta _modified+2
sta _pixeladdr+1
lda p8v_length
ora p8v_length+1
beq _zero
ldy p8v_length
sty P8ZP_SCRATCH_B1 ; length
ldx #$ff
_modified stx $ffff ; modified
lda _modified+1
_more txa
ldy #0
sta (_pixeladdr),y
lda _pixeladdr
clc
adc #8
sta _modified+1
sta _pixeladdr
bcc +
inc _modified+2
+ dey
bne _modified
inc _pixeladdr+1
+ dec P8ZP_SCRATCH_B1 ; length
bne _more
_zero
ldy p8v_separate_pixels
beq hline_zero2
lda _modified+1
sta P8ZP_SCRATCH_W1
lda _modified+2
sta P8ZP_SCRATCH_W1+1
beq _end
lda hline_filled_right,y
ldy #0
ora (P8ZP_SCRATCH_W1),y
sta (P8ZP_SCRATCH_W1),y
jmp hline_zero2
ora (_pixeladdr),y
sta (_pixeladdr),y
_end rts
hline_filled_right .byte 0, %10000000, %11000000, %11100000, %11110000, %11111000, %11111100, %11111110
hline_zero2
}}
}
}